Jena Tec Ballscrews, Spindles and Linear Motion Systems and Components

Jena Tec Wins EON Team National Safety Award

2011-03-12T00:39:00.000-08:00

Avingtrans plc has announced that their operating company, Jena Tec has been recognised within the E.ON ‘SHE’ awards relating to safety, health and the environment for their work with the Connah’s Quay E.ON engineering team on a significant technical engineering development.

The SHE award Team Category was made to the E.ON Connah’s Quay team for their work with Jena Tec in developing an actuation system which offers greater safety in operation (than the traditional hydraulically operated actuators).

The Jena Tec team’s work involved development of an electro-mechanical solution to overcome the dangers of using hydraulics for operation of high force actuators (used to control turbine safety bypass valves for high pressure steam pipes).

Temperatures of 500°C are encountered and hydraulic fluid leakage was a known fire risk with the potential of causing major damage to the turbine installations.
Installation of nine replacement units took place at the E.ON Power Station in Connah’s Quay, United Kingdom following design and development by the Jena Tec team technicians over the previous three years. E.ON report increased levels of operational safety and decrease in maintenance costs relating to the actuation systems.

Paul Ward, Managing Director of Avingtrans Industrial Division maintains that the successful application of automation grade mechanical precision actuation to the arduous E.ON application is a great case study for a multi-disciplinary approach to engineering solutions. And this approach is enabling engineers to take advantage of modern control system technology to combat safety and environmental issues. He says that the Jena Tec’s investment in this sector of technology has great growth potential worldwide not only in hydraulic replacement but also pneumatic, fuel valve regulation, fire arrestment technology and many related fields.

For further information go to www.jena-tec.co.uk or www.valve-actuator.net

€2.2 m contract win for Jena Tec Medical Components

2011-02-10T03:11:00.000-08:00

Jena Tec, the designer, manufacturer and supplier of critical components and associated services to the energy, medical, industrial and global aerospace sectors, announces that it has signed a 3 year agreement with a leading European medical equipment manufacturer, where Jena Tec will supply high precision miniature ballscrews for use within a range of equipment by the customer.

The total contract value is approximately Euro 2.2m over three years and will commence in Q4 2011 before full production volumes are added in 2012.

The components within specialised medical equipment require suppliers of exceptional quality and delivery reliability and this agreement further bolsters Jena Tec’s planned growth in this high tech area. Jena Tec continues to invest in this growing area of medical instrumentation through increased testing and production facilities at its state of the art German facility.

Paul Ward, Managing Director of Jena Tec commented: “This is another example of Jena Tec’s transformation to a full service industrial partner to our major customers and it clearly demonstrates the long-term commitment to world-class quality and delivery”.

New Face Joins Jena Tec in Business Development

2011-02-10T02:48:00.000-08:00

February sees a new member to the team in Dave Cloake appointed as Business Development Manager to Jena Tec UK focusing on the MRO sector (Maintenance Repair and Overhaul). Having worked in the Automotive industry both with Ford and Toyota, Dave moved into the service sector in the field of asset repair for critical machine tool electronic components and assemblies servicing the major automotive OEM's and 1st tier suppliers. Now with Jena Tec UK, Dave brings a wealth of experience to the company to expand our service capability and support for our growing customer base.

Dual Grinding Spindle Offers High Productivity and Small Footprint

2010-06-18T11:52:00.000-07:00

The remit from the customer was simple, design and produce a grinding spindle that can do two jobs in one with 2 different grade fixed wheels. Sounds easy, but the solution to develop a grinding spindle able to grind with two different wheel grades without the use of an expensive tool changer mechanism demanded the combination of the experience of the customer (A leading player in the manufacture of grinding machines for the renewable energy sector) as well as the full linear and rotary motion background of Jena Tec working as a team to develop a highly customised spindle suitable for a demanding grinding operation.

Jena Tec's solution was to develop a motorised spindle capable of grinding speeds up to 6,000RPM with a special splined dual shaft arrangement utilising a highly effective seal and bearing arrangement which allows a static position rotating outer shaft to hold a large diameter grinding wheel while maintaining a smaller diameter inner grinding wheel maintained in a fixed rotational position from inner to outer wheel. Utilising Jena Tec's precision linear motion components, the system uses a servo drive and gearbox arrangement to extend the inner shaft and wheel very precisely when required while keeping very accurate run out and stability. Through spindle coolant was also required and achieved through the use of a specialist Deublin coupling. Another customer demand was to use spring water cooling which meant providing specific elements of the machine tool spindles in corrosion resistant materials.

The key benefit to the customer was that they can combine roughing and finishing operations with 2 different wheels on the same machine tool spindle thus saving the number of fixed position spindles needed within the machine layout, reducing handling time in between operations and also machine footprint. This contributes to the customer being able to offer a much more competitively priced machine tool system with higher productivity compared to their existing competition.

The Jena Tec dual spindle was designed and delivered in adherence to demanding customer build schedules and is another clear example of Jena Tec's specialist area of product development to support OEM machine tool makers product introduction and technology development.

For more information please go to www.jena-tec.com or email sales@jena-tec.com

Jena Tec Systematic Contract to Automotive Tier 1 Supplier

2010-06-18T11:46:00.000-07:00

The Systematic Multi Head range now exclusively manufactured by Jena Tec provides a wide range of engineered solutions for High Productivity Machining. Our experienced engineers can design or retro-fit our multi head components into your machining centre to maximise the productivity demands of today's environment, offering you time and cost savings in the manufacturing process.

In June 2010 Jena Tec is pleased to announce a significant value contract win to a leading UK tier 1 supplier to an automotive OEM for diesel engine components. The Jena Tec remit was to re-design a range of multi head systems and replace an aging Marwin 3 machine transfer line of rotary transfer systems with new slideways and multi head drilling systems to enable a new diesel engine variant component to be produced using an existing line. As space was at a premium, investment in additional machine tools to satisfy production and also the high capital cost meant that Jena Tec's Systematic upgrade option was the preferred option in terms of timing, cost and floorspace to allow the customer to meet rising demand for production of new engine types.

The scope of supply includes the design, manufacture and retrofit of a complete series of CNC machine tool systems with more modern technology and machine tool components allowing faster productivity and throughput. The complete project will be designed, installed and commissioned by January 2011. Jena Tec's investment in the brand name of Systematic, a well known respected name in the automotive industry has secured their position in the niche engineering sector and takes advantage of a shrinking skill set for this type of work available in the UK. Export potential of this high precision sector of the machine tool industry is showing positive indications as Jena Tec capitalise on their global distribution network and group companies particularly in mainland Europe, USA and Asia.

For more information contact the Jena Tec team on +44 (0)1623 726010 or email at sales@jena-tec.com

Jena Tec Systematic Multi Head Spindles

2010-03-05T12:50:00.000-08:00

Jena Tec Miniature Ballscrews Deliver High Precision and Low Drag Torque

2010-03-05T12:46:00.001-08:00

Jena Tec Miniature ballscrews can be manufactured from 6mm diameter with 1mm pitch with exacting precision grades less than 6 microns over the stroke length and very precise drag torques of 0,002 to 0,005 Nm. Jena Tec experiences a wide range of demanding customer applications in the fields of medical, aerospace actuation and instrumentation. Customer specifications vary depending on the use of the ballscrew and Jena Tec designers know how to accomodate important parameters such as motor torque, long life lubrication, low noise, elevated temperatures and extended life time calculations into specifying a product that fits for each request.

As well CF53 controlled case depth or through hardended material, Jena Tec can accomodate materials including aerospace standard and corrosion resistant materials in their range including those suitable for vacuum applications.

All Miniature ballscrews undergo rigourous testing to ensure compliance with drag torque and accuracy requirements on our well equipped test facilities in Jena.

For more information on the miniature ballscrew range, contact Jena Tec on sales@jena-tec.co.uk or +44 (0)1623 726010.

Jena Tec Raydent coating extends linear rail life

2010-01-25T13:54:00.001-08:00

Developed in Japan in the 1960's and well proven in industry, Raydent coating is a proprietary technology deposited by low temperature electrochemical bonded chrome ceramic particles diffusion bonded to provide a layer up to 1mm thick on the surface of the metallic substrate.

The Jena Tec SBC range of linear rail uses this proprietary technology to great effect for corrosion protection making it suitable for corrosive environments, food grade applications and clean room standard machinery such as that used in semi conductor manufacturing.

The method of coating deposition ensures no hydrogen embrittlement takes place while a high degree of elasticity is maintained in the coating such that even while the steel substrate is flexed and placed under repeated external deformation or bending, the coating maintains its appearance and performance and is free from flakes, chips and cracks which may appear in other anti-corrosion treatments such as chrome or nickel plating.

Tests conducted on linear rail within materials testing institutes showed that for a variety of tests, SBC rail Raydent coated outperformed alternative electro chemical methods with no evidence of rust whereas traditional coatings such as chrome plating corroded significantly. Raydent was effective in concentrated sulphuric acid environments, sodium hydroxide and salt water spray tests with no evidence of degradation.

Specially treated to order, the Jena Tec SBC Raydent treated range provides a superior lifetime performance in excess of 10 years.

For information contact the Jena Tec team on +44 (0)1623 726010 or email at sales@jena-tec.co.uk

Jena Tec SBI Linear Rail offers 40% increase in capacity

2010-01-12T09:01:00.001-08:00

The SBI range available from Jena Tec provides multiple benefits compared to those offered by the competition in relation to low noise, high rigidity and load coupled with a smooth movement and self adjusting mechanism. Increase of load carrying capacities of up to 40% can be achieved compared to standard block and rail systems.

Compared to conventional linear rail cross sections, the SBI range is approximately 10% lower in height with a wider through section of nearly 20%. Its improved lower cross sectional centre point offer greater structural rigidity, improved straightness during manufacturing and therefore a higher level of straightness in application which benefits the customer for smooth running. Heat treated to HRC60 the SBI range is extremely stable and shorter cross sectional areas mean grinding time and plastic deformation are reduced.

Similarly, Linear blocks are constructed from a hardened steel rigid structure with the same lower cross section centre as the rail and slightly longer block length meaning a greater number of balls with a smooth circular angular motion. This improved track profile and angle results in a smoother and quieter operation.

Standard across the range of SBC products is the heat and chemical resistant end plate with moulded return systems and a self aligning retained designed to ensure the end plate is correctly fitted in line with the main steel block. Despite an increased load carrying capability the additional length attributable to the SBI range is approximately only 3-4 mm longer than standard types dependant on carriage model made possible by an improved end plate design. When considering the advantage of 40% increase on load, the additional length is very modest.

Upper and bottom retainer plates fitted to each block ensure that loose steel balls are eliminated as well as skidding and poor rolling performance within the load zone. Additionally, this benefits the cleanliness of the block by preventing ingress of foreign substances. Advocating a simple design philosophy, the SBI retainers are snap assembled and self aligning. The moulded return plate contributes to the smooth running operation of the SBC range as well as keeping running noise low.

The SBI range achieve this through an improved contact angle of 52% versus the industry standard of 53%. The lower radius of curvature provides a broader contact surface compared to the relevant ball size possible and therefore improves the rigidity.
The improved angular ball re-circulation system with 4 row 2 point contact and 45 degree angular orientation ensure that excellent rolling performance is maintained with low noise even at all grades of pre-load.

For further information, contact the Jena Tec sales team at www.jena-tec.co.uk or on +44 (0)1623 726010.

Jena Tec MF option linear guides keep going and going...........

2009-12-15T19:51:00.000-08:00

Expensive lubrication systems become a thing of the past and for machines without lubrication, Jena Tec's SBC MF series linear rail option extends the life and performance of your linear system by a significant factor.

The MF Lubricating Seal now offers longer life for SBC Linear Rail Systems, eliminating the necessity for periodical greasing. The MF Unit contains high quality ,grease filled fiber seals which will guarantee total surface lubrication and long maintenance free bearing life. The polymer housing containing the surface contact seals are tolerance matched to the guide rail to ensure perfect sealing and smooth motion.

MF Seal Units are grease filled and the lubricant is contained , spread and absorbed by the fiber seals. Using grease rather than oil ensures that the lubricant is retained within the MF seal units for a much longer working life than oil would remain. The grease used would be compatible with most standard industrial grades recommended for use in bearing blocks and provides excellent thermal stability and water proofing characteristics.

Tests conducted by SBC show a clear advantage of MF type seals, despite a modest increase in overall length through the slim line design of the fiber seal housing. Results show that for a standard theoretical distance life time calculation of a heavy pre-loaded guide block that the distance for an MF type under heavy load can be increased by 40% up to a 1000Km with no sign of degradation or wear affecting performance or accuracy. For light pre-loads the life extension can be up to a factor of 10 times. Even then replenishment with new MF end caps is a very simple straightforward procedure to give a further period of un-interrupted service.

For more information, contact the Jena Tec team on +44 (0)1623 726010 or email sales@jena-tec.co.uk or visit http://www.jena-tec.co.uk/

Intelligent GMN UHS Spindles from Jena Tec UK

2009-11-30T01:46:00.000-08:00

In addition to our own manufactured range of high quality B&T customised spindles for milling, turning, boring and grinding, Jena Tec represents a high quality German brand GMN Nuernberg in the UK market for high speed and high frequency machining spindles.

In this issue, we've provided some detail information about GMN's capability in ultra high speed grinding spindles. Conventionally supplied by air bearng spindles which have some limitations and disadvantages in terms of cost and running efficiency, GMN's UHS series provides a robust oil lubricated grinding spindle for exceptionally high speeds up to 250,000RPM coupled with an exacting stability and geometric tolerance. A minimised oil/air dosing system means just the right amount of lubrication gets to the spindle and reduces maintenance and running costs throughout the life of the spindle.

Jena Tec's automation division can offer the UHS series from GMN including integration or retrofit to existing machines. If you would like to discuss how we can offer you the advantage of higher speed and better process performance from your grinding machine, then give our UK office a call on +44 (0)1623 726010 or by email to sales@jena-tec.co.uk

Intelligent Spindles from GMN**

Processing small internal diameters with optimum cutting speeds requires high rotational speeds. New GMN spindle ball bearings with very high speed characteristics permit 250,000 revolutions per minute, for instance, with comparatively high spindle rigidity and load capacity. Optimized lubrication of high speed spindles offers great potential for increasing performance. Furthermore on-demand minimal lubrication lowers oil consumption and increases service life. In future integrated data loggers will monitor the condition of the spindle, store the operating parameters and guarantee high availability. GMN has a long track record of supplying a wide range of high frequency spindles of up to 180,000 rpm. However, around two-thirds of the spindles supplied for internal grinding operate with maximum speeds in the 30,000 to 90,000 RPM range.

250,000 RPM for small bores
To operate efficiently, a machine tool spindle must have the appropriate load capacity, rigidity and dynamic run out. In order to guarantee these characterisitcs even for extremely high speeds, the GMN development department was faced extraordinary challenges. Breaking points are reached due to the high centrifugal forces, a compact design has to ensure subcritical operation with sufficient distance to the first critical speed, high precision hybrid ceramic bearings have to be designed specifically for the demands of high speed spindles. These challenges were met wth the the help of current advances in motor technology and the use of further developed GMN spindle ball bearings. It is now possible to efficiently grind small internal geometries with up to 250,000RPM. The GMN grinding spindles used for this purpose have a comparatively large and rigid mounting and a powerful sychronous motor. Consequently, they are not only suitable for special applications at maximum speeds but can also be used flexibly and efficiently in a relatively large rotational speed range.

Integrated lubrication module
These days, ball bearings with permanent grease lubrication or oil/air lubrication are predominantly used in machine tool spindles. Yet both methods have their disadvantages which can be overcome by an innovative micro-dosing system combined with appropriate lubrication strategies. Compared with today's oil/air lubrication method, a significant reduction of the lubricant quantity necessary can be achieved and the systematic performance limits of grease lubrication. I.E. Limited usable life of grease at high temperatures and speed, are to be exceeded. Minimizing lubricant quantities makes ecological and economic sense. It facilitates the inegration of an oil reservoir in to the spindles and ideally requires no more external components. The problems associated with waste oil disposal are also defused. Operating costs of machine tools can exceed acquisition costs several times over if calculated over a normal life cycle. These costs are therefore a decisive factor for many users when making an investment decision. An integrated lubricant cartridge means that high maintenance external components can be dispensed with. The lubricant reservoir only needs to be replaced at relatively long intervals. An almost instant dosage of lubricant ensures that the adjustment of the lubricant quantity matches demand based on the exact measurements of the bearing. This increases reliability and efficiency of the bearing and reduces the quantity of the lubricant needed.

Third generation spindles for machine tools
Spindles are also becoming more and more intelligent. Miniaturised electronics which are integrated in the spindle stores the sensor signals, processes them and reports any exceeding of critical values to the overall machine control system. Important operating data can be accessed during the entire running time of the spindle and can also be analyszed with regard to optimising the process, machine and spindle. In addition, the aim is to go for bearing condition monitoring and consequently early damage detection,based on these intelligent systems is possible. Evaluating temperature sensors, position sensors and vibration sensors will increase precision and productivity of the production process. Additional sensors, on the other hand, harbor the risk of reducing the availability of the spindle system further, therefore, as few additional sensors as possible should be employed and for the time being, a more intelligent analysis of available signals should be aimed for.

** Reproduced from an article by Dr. Bernd Moeller, Head of Engineering Spindle Technology Division at GMN Paul Mueller Industrie GmbH & Co. KG in Nuernberg, Germany.

For service and support on design, selection, repair and replacement of spindles from GMN in the UK from Jena Tec go to www.jena-tec.co.uk or call our UK office on +44 (0)1623 726010

Principles of Ballscrew Repair

2009-11-25T09:20:00.000-08:00

Principles of Ballscrew Repair

What exactly does happen to a ballscrew when it fails and what are the principles and procedures to repair a ballscrew from a company such as Jena Tec?

The most frequent cause of failure of a ballscrew is either loss of pre-load or rough running typically characterised by a fault flagged by a CNC control system of a machine tool or dimensional inaccuracy or poor surface finish. This in turn is caused by gradual degradation of the ballscrew surface through metal to metal contact of the re-circulating balls to the hardended metal surface of the ballscrew shaft. This repeated contact over an extended period of time leads to a worsening of the ballscrew surface and ultimately erosion and wear.

Lubrication can therefore have an obvious impact on the lifetime of the ballscrew as well as protection from debris from the machining processes. Over time as a machine condition worsens, axis covers and bellows can be damaged and allow machining debris to enter the ballscrew nut even through wiper seals. Over lubrication can also be problematic particularly with grease lubricated systems where too much lubrication can cause pressure on the ballnut return system causing the tube to literally burst with excess grease.

The second most frequent cause of ballscrew failure is catastrophic failure due to an exceptional shock load, which is more commonly recognised as a machine crash. The abrupt excessive load and rapid decceleration from a machine crash can cause buckling of the ballscrew shaft and damage to the ballnut itself including splitting some of the re-circulating balls within the ballnut meaning even if the machine runs afterwards the ballscrew will very quickly fail after a short period of running.

Typical Ballscrew Failure Points

A - Metal Fatigue & Wear to Bearing Surfaces
B - Surface Brinelling
C - Wear & Damage to Balltrack
D - Loss of Squareness to PCD
E - Ball Wear/Breakage
F - Loss of Pre-Load
G - Shaft Bent
H - Damaged Threads
I - Uneven wear over Balltrack
J - Poor System Concentricity
K - Wiper Seals Worn Leaking Lubricant
L - Excessive Backlash
M - Return Mechanism Worn/Broken

The good news is that for routine wear, a ballscrew life can be extended for a further period of service by a very straightforward procedure of repair of the ballscrew by a company such as Jena Tec. Firstly, the ballscrew is checked for its initial condition, this includes checking its free running condition and the "as received" pre-load or drag torque. The ballscrew then undergoes a 32 point healthcheck to check the major points contributing to the ballscrew performance. You can see some of the major areas of inspection referred to above.

After extensive cleaning and checking, the ballscrew, if repairable, is polished along the length of the ballscrew track and undergoes ultrasonic cleaning of the ballnut coupled with high pressure washing to remove baked on grease and grime. The ballscrew assembly is then re-built with oversized micron graded precision ball bearings to achieve a satisfactory level of pre-load along the length of the ballscrew according to DIN specifications.

The unit is then put on extended test and Jena Tec facilities include the ability to document and test the ballscrew running performance on motorised testing rigs. Where a ballscrew passes, a complete documented test report is provided for the customer detailing the received condition and the pass criteria with drag torque graphs and certificates of conformance. Based on Jena Tec's expert assessment, the unit is warrantied with recommendations for the customer on the extended life period.

While many claim to offer ballscrew track re-grinding, Jena Tec advise that due to a weakening of the induction hardened surface and also the cost to re-grind, that in most cases it does not make economic sense to re-grind the ballscrew track form. It is however feasible to re-furbish bearing end journals by hard chrome plating or metal spraying and then re-grinding with a precision universal grinder to exacting bearing fit tolerances. Fixing thread forms are always checked, cleaned and re-furbished where possible as well as wiper seals, fixing key ways and a variety of related small details.

What happens when the ballscrew is not in a repairable condition? Not all is lost, as most ballscrews can be repaired to give a shorter extended life, but in this instance Jena Tec would not offer a warranty but strongly recommend the customer buys a new replacement unit. Jena Tec's extensive stock of precision ground, rolled and whirled product means that we can offer a matched replacement sometimes within the same working day to provide an OEM quality replacement ballscrew.

This means that Jena Tec has the ability to support not only your repair requirements but also your spare parts backed up by our highly trained linear motion technicians, high stock levels and capable precision machine shop.

Typical makes and types of ballscrew repaired by Jena Tec include;

THK NSK Steinmeyer Mannesmann
Hiwin PMI ABBA Comtop
20th Century TCM Blis Berger Bosch
SKF PSI Saginaw Nook
Rockford Nachi Thompson IBL Star
Shuton Iperanga Korta LSI
Barnes American Ballscrew Warner Electric

For service and support on design, selection, repair and replacement of ballscrews and linear motion from Jena Tec go to www.jena-tec.co.uk or call our UK office on +44 (0)1623 726010

Jena Tec 50% Ballscrew Repair Discount

2009-11-18T06:08:00.000-08:00

We all know the current economic situation, times are tough and maintenance budgets slashed but some machines just have to keep going and need to be repaired. Let us ease the current economic chill just a little and make you aware of our fantastic winter offer for ballscrew repairs.
Send us your failed ballscrew for repair assessment and we will give you a 50% discount off the repair price. All prices are quoted on a standard length and diameter matrix meaning you get a great genuine discount coupled with the outstanding service from Jena Tec.
But don't delay, this offer lasts until January 2010, ring our UK sales office on +44 (0)1623 726010 and ask for your free discount voucher code**.
Then next time you have a ballscrew failure, ship it in, we'll check it over and provide our detailed repair report and commercial offer. If you decide to go ahead place your purchase order and quote your voucher reference, it's that simple, a great discount of 50% on your next repair.
Contact Jena Tec on +44 (0)1623 726010 or email to sales@jena-tec.co.uk
Jena Tec repairs ballscrews of any make, type or configuration with whichever type of ballscrew transfer system. Our specialized repair and ballscrew testing facilities mean we can repair ballscrews up to 15m in length and 200mm in diameter. Because Jena Tec design and manufacture ballscrews, we like to think we know a thing or two about ballscrew repair to give the you the customer a first class 1A ballscrew repair. We can offer express ballscrew repair out of hours and while you wait. We can collect your failed ballscrew needing repair or be available to accept your delivery 24/7. Upon receipt of your ballscrew, we log your ballscrew onto our repair system and provide our free of charge assessment report. Measuring critical parameters and conducting a 32 point ballscrew repair check means we offer an unrivalled service for ballscrew repair internationally. Additionally, Jena Tec’s ballscrew repair service technicians can assist with removal and refitting of your ballscrew at your request. Backed up by extensive OEM precision ground, rolled and whirled ballscrew stock designed specifically for the ballscrew repair market, Jena Tec offer rapid reverse engineering and emergency replacement of your failed ballscrew should repair not be possible. Not only that but Jena Tec’s ballscrew upgrade service means that often we can diagnose the failure mode of your ballscrew and offer a drop in replacement with our XLF series precision ballscrews.
Jena Tec offers International, European, UK and USA ballscrews repairs so just give our hotline a call to make arrangements now. It’s as simple as A B C for linear motion and ball screw repair services from Jena Tec. Keep an eye out for our special offers relating to Jena Tec ballscrew repair.
Not only can Jena Tec repair ballscrews, we can also repair your ballscrew and belt driven linear actuators, gearboxes and lifting jacks. Jena Tec’s repair capabilities include hard chrome, re-grinding, reverse engineering and replacement engineering of spare parts within the ballscrew, actuator or gearbox range.
Ballscrews and Actuators Makes & Manufacturers we can repair include;

THK
NSK
Steinmeyer
Mannesmann
Hiwin
PMI
ABBA
Comtop
20th Century TCM
Blis
Berger
Bosch Rexroth
SKF
PSI
Saginaw
Nook
Rockford
Nachi
Thompson IBL
Star
Shuton
Iperanga
Korta
LSI
Barnes
American Ballscrew
Warner Electric

**Terms and conditions apply. Excludes shipping and transportation costs to/from Jena Tec UK. Voucher is valid until 31st January 2010 against new valid purchase orders placed in this period for a single ballscrew repair. Discount is subject to credit and account status. This value is not transferable or available as a cash/credit refund.

Jena Tec joins European Power Transmission Distributors Association (EPTDA)

2009-09-08T13:28:00.000-07:00

Jena Tec, a leading supplier and manufacturer of ballscrews, linear rail, actuators and machine tool spindles has raised its profile with the membership of the European Power Transmission Distributors Association http://www.eptda.org/ . EPTDA is one of the leading distributor trade associations in Europe and provides highly professional membership based services for distributors and manufacturers in the power transmission field. Jena Tec will commence with exhibiting at the EPTDA annual conference in September 2009. EPTDA is an ideal fit for Jena Tec as a manufacturer member is one of a limited number of manufacturers offering a complete range of linear and rotary motion components and assemblies through distibutor channels worldwide. For further information go to http://www.jena-tec.co.uk/ or www.eptda.org . Jena Tec company details are listed on EPTDA also. Alternatively contact Jena Tec on +44 (0)1623 726010 or by email at sales@jena-tec.co.uk

Jena Tec joins Bearing Net Supplier Network

2009-09-08T13:20:00.000-07:00

Jena Tec a leading supplier of precision machine tool components including ballscrews, linear rail, actuators and machine tool spindles has joined the Bearing Net network to offer its customers a complete service including precision spindle bearings. By keeping extensive stocks for popular sizes in precision grades Jena Tec can offer a wide range of bearings grease packed, oil/air lubricated and hybrid ceramic from GMN, NSK, FAG, INA, SKF, SNFA for the OEM, distributor and MRO markets. For more information go to http://www.jena-tec.co.uk/ or http://www.bearingnet.net/

For further information, visit our website or alternatively call our UK office on +44 (0)1623 726010 or email at sales@jena-tec.co.uk

Jena Tec WBSVH Grinding Attachment for Vertical Lathes & Turning Machines

2009-05-06T14:54:00.000-07:00

Adaption of a vertical turret lathe or turning centre into having a grinding capability couldn't be easier with the use of a Jena Tec WBSVH grinding head. Jena Tec design and manufacture the B&T WBSVH range to be customised to provide a range of extension lengths with 1.5 or 3HP versions at speeds of up to 6000RPM. The WBSVH motorised grinding spindle range is ideally suited to retrofit or periodic use as a grinding attachment for vertical lathes. The unit can be easily fitted by directly mounting onto a tool post turret position or by a suitable adaptor plate to allow the operator to remove when not required. Jena Tec also provide its range of CT portable inverters to allow speed control and constant torque through a suitable drive system supplied with cubicle and customer specified length of armoured cabling. The robust Jena Tec WBSVH spindle has a rugged cast iron body and durable AC motor. The extension sleeve is made from excellent quality steel and the entire unit is finished in a 2 pack epoxy paint coat to a high standard. Irrespective of extension sleeve length, the wheel location taper is ground accurately to within a few microns runout providing customers with the assurance of a high quality accurate grinding process. The Jena Tec WBSVH range is particularly suitable for grinding of honeycomb in aerospace, grinding of abradeable coatings, ceramics, hard facing, stellite coating and can be adapted to a wide range of vertical machining centres including Webster & Bennett. for further information go to http://www.jena-tec.co.uk/ or contact Jena Tec on +44(0)1623 726010 or by email at sales@jena-tec.co.uk .

Jena Tec Launches Precision Rotary Tables

2009-03-25T01:23:00.000-07:00

Jena Tec announces two further models to its linear and rotary motion ranges in the field of precision rotary tables. The first model, the MRT230 is a lightweight ring grinding unit driven by a pancake segmented motor via a gearbox and toothed belt. The cast alloy base plate allows bolting directly to a grinding machine table.

Mounted on the rotary axes employing ABEC 7 angular contact bearings is a magnetic chuck, 230mm diameter providing load capability of up to 30kg. The central 40mm location spigot allows location of fixturing and the unit can be supplied with a variety of 3 jaw chucks and t-slotted face plates on request. The unit is supplied complete with an electrical control box providing infinitely variable speed control up to 120RPM. The MRT230 is an ideal solution for rotary grinding of bearing spacers and other applications where constant surface finish is important combined with accurate parallelism.

The second series is the ABRT Series Air Bearing Rotary Table. This expansive range provides a highly accurate rotational motion in either manual or CNC mode with minimal effort through the provision of an air bearing cushion. The unique hydraulic clamping mechanism allows rigid clamping for heavy duty machining. With table diameters from 500mm to 2000mm and table loading up to 10,000kg with repeatability of +/-0.2 arcsecs, the range is an exceptional high quality attachment suitable for a variety of applications in boring, milling, grinding and inspection.

The ABRT series can be provided with a torque motor option, encoder feedback and digital readout and can be fully integrated within a CNC control. Jena also offer an industrialised PC based CNC control allowing retrofitting to existing manual machine tools. Customised designs of ABRT rotary axes can be provided on request relating to higher loading, diameter, acceleration and tolerances.

For further information, go to http://www.jena-tec.co.uk/ or alternatively contact our sales office on +44(0)1623 726010 or by email sales@jena-tec.co.uk

Jena Tec secures long term contract in China

2009-01-26T00:37:00.000-08:00

Jena Tec, a UK based designer and manufacturer of precision machine tool ballscrews, linear motion and spindles with facilities in England, USA and Germany, has secured a long term contract with a customer in China for the supply of a high precision spindle used in an accurate CNC turning machine. The Asian customer will be producing highly accurate machine tools principally for export to Europe and North America and will utilise Jena Tec’s high performance spindle to satisfy the demanding requirements of small precision turned components.
Manufactured using carefully selected materials including nitride hardened rotating parts and precision grade rolling element bearings, the spindle is guaranteed to provide a concentric run out within 0,001mm (1 micron) with excellent thermal stability and low noise running at up to 6,000RPM. The spindle product is accurately ground using the latest precision equipment and assembled by hand by skilled machine tool personnel to attain the highest levels of accuracy. Each spindle is closely inspected and certificated as meeting the required standard which is documented to the customer.

Jena Tec, part of the Avingtrans plc Engineering Technology Group, was selected on the basis that it could design and manufacture a high precision product rapidly for prototype testing followed by volume production ensuring the customers’ product development programme was supported adequately.
The contract in total represents £1.8m for Jena Tec and was won against strong competition from Japan and Korea and further supports Jena Tec’s continued success in the niche sector of high precision linear and rotary motion components.
The name of Jena Tec is closely linked to the town of Jena in Germany where it has maintained one of its manufacturing facilities for over 30 years. The name of Jena is closely associated with Carl Zeiss and high precision scientific, medical and engineering industries with companies such as Carl Zeiss Jena, Jenoptik and Schott Jenaer resident in this famous University town.
Jena Tec is justifiably proud of its heritage and ability to adapt to the changing global economy by continuing to design and develop high precision products.
For further information on Jena Tec, go to http://www.jena-tec.co.uk/ or for Avingtrans plc, go to http://www.avingtrans.plc.uk/

2008-12-05T01:42:00.000-08:00

Complimenting its high quality precision ballscrews, Jena Tec is pleased to announce the introduction of a specialist gear and transmission component manufacturing service to the UK and USA markets.
Produced in Germany within the main Jenaer Gewindetechnik production facilities, the ZRF division of Jena Tec produces a wide range of specialist components such as bevel gears, worm and wheel shafts, rack and pinion and special miniature lead screws for a wide variety of high tech industries including optical, medical, automotive and precision automation and machinery.
Gears with diameters from 3mm to 160mm can be produced on modern production equipment with internal gear hobbing, planning and grinding on machines from Schaublin, Koepfer, Mikron, Reishauer and Lambert machines. Tooth accuracy can be provided up to IT4 quality with certified inspection results.
Jena Tec can provide specialist engineering know how in the design and selection of your gear design and welcome the opportunity to offer their customers a design appraisal service along with production facilities from prototype to commercial quantities produced strictly in accordance with DIN ISO 9001. For full details of this range, contact the sales office on +44 (0)1623 726010 or by email sales@jena-tec.co.uk or at the website www.jena-tec.co.uk

Jena Tec extends UK, EU and USA stocking policy for precision ballscrews

2008-10-06T04:18:00.000-07:00

Jena Tec, part of the Avingtrans plc Engineering Technology Group, has substantially increased its finished and part finished ballscrew stocking to allow more effective servicing of its respective markets.

Following substantial capital investment in the latest thread whirling, grinding and process machinery, Jena Tec is able to provide ex-stock availability of precision rolled, ground and hard whirled ballscrew assemblies from grades IT1 to IT10. Special sizes and make to print services are also available.

The increased size ranges include from diameter 16mm through to 80mm in stock in a variety of precision grades and up to 6m in length.

Ballnuts are able to be offered to DIN standards as insert design or through the nut transfer but also due to the Jena Tec unique ballnut design are able to be offered made to sample or drawing through Jena Tec rapid manufacturing service, whereby ballscrew shafts will be cut to length, turned, ground, machined and assembled.

The improved stocking policy makes Jena Tec a leading manufacturer and distributor of ballscrews able to offer short delivery times to a high standard satisfying both the demanding aftermarket and also the requirements of the OEM.

As part of its enhanced service, Jena Tec can provide call off agreements, scheduled deliveries and customisation to suit the OEM’s actual machine build. The ballscrew range is complimentary to the complete linear motion and rotary motion product range provided by Jena Tec including linear rail, end supports, linear guides, machine tool spindles and linear actuators.

For more information, contact the Jena Tec team on +44 (0)1623 726010 or email sales@jena-tec.co.uk or visit http://www.jena-tec.co.uk/

Jena Tec SBC C Type Linear Guide Improved Rolling Performance

2008-09-24T15:07:00.000-07:00

Jena Tec is pleased to introduce the new SBG(S) - C type linear guides adopt existing 4 row circular arc internal geometry and can therefore interchange with any carriage now operating on SBC standard rail profile. The C type design incorporates ball return tubes and reversing end plates now moulded together as a single component . This offers smoother operation than all previous internal designs for linear bearing motion in any plane whether vertical or horizontal. The C type single component mould achieves great reduction in ball direction reversing and “no-load return tube” noise, allowing better lubricant flow . Lubrication is simpler, as the grease nipple can be inserted in multiple orientations ( Front, Left and Right ).

For more information, go to http://www.jena-tec.co.uk/ or contact via +44(0)1623 726010 or email sales@jena-tec.co.uk

Jena Tec Precision Ballscrews and Spindles

2008-09-16T05:45:00.000-07:00

Jena Rotary Technology Ltd (Jena Tec) is a company dedicated to supplying high quality repairs and OEM replacement spindles and ballscrews whilst also incorporating distribution of many other linear and rotary motion products. Jena Tec is a daughter company of Avingtrans plc engineering technology group.
Our extensive product range offers broad application of possibilities connected with customized designs and solutions. The products manufactured by Jena are used in the automotive industry, precision technology industry, in medical and robotic systems and many other technical applications. For more information go to http://www.jena-tec.co.uk/ or call our sales team at +44(0)1623 726010

XLF Ballscrews Extend Machine Tool Life

2008-09-16T05:24:00.000-07:00

Ball Screws are mechanical devices for converting rotary motion into linear motion and vice versa. Ball Screws have become an integral part in modern machine tools due to their positional accuracy, load bearing characteristics and low friction when compared with lead screws, however little has changed in design since the first use of the ball screw in machine tools some decades ago. A common misconception is that to improve a ball screw all that is necessary is to improve lead accuracy, whilst improvement in lead accuracy is important, there are many areas in which design improvements can have significant impact on overall machine performance.

Therefore, the ball screw cannot be considered in isolation but as one element influencing servo loop performance. In developing their new XLF™range ball screws, Jena Rotary Technology Ltd have recognised the importance of the ball screw in servo loop performance, and designed a ball screw to meet the demands of modern machine tool controls. One important factor to consider is reversal error, (reversal error occurs when lost motion is apparent during change of rotational direction in the ball screw) which can affect positioning and surface finish in the work piece. The reaction of the mechanical elements in a system can have a significant effect on reversal error.
The unique design of the XLF™ has produced a ball screw with extremely low coefficient of friction whilst retaining high system rigidity and eliminating reversal error. Due to the design and materials used, it has also been possible to reduce the preload in the ball nut whilst retaining rigidity. Ball Screw life, and wear accuracy have also been significantly improved, the ball screw is also extremely quiet compared with traditional designs. Another benefit is thermal stability of the assembly due to the reduced preload, improved rigidity and low coefficient of friction, producing a ball screw with extraordinarily low levels of heat generation.
These improvements have been achieved using hybrid materials and changes in the design of the raceway profile in the ball screw and the ball nut, the changes are not noticeable to the eye with the exception of the blue/grey appearance of the ball screw, and the reduced preload and super smooth run can be felt when the ball nut is turned by hand.
Clearly these benefits are not restricted to the machine tool industry; any applications where high accuracy, extended life and low levels of noise are required would benefit from the advantages the XLF™ range ball screws offer.

For more information on the Jena Tec range of ballscrews, spindles and linear motion products and services, contact our sales team on +44 (0)1623 726010 or sales@jena-tec.co.uk or http://www.jena-tec.co.uk/

Linear Actuators cross the Atlantic

2008-09-16T05:17:00.000-07:00

Jena Tec has introduced its VT and HD ballscrew-driven linear actuators to Europe. The products are already available in the US where they have been used in military, medical, hydraulic and pneumatic replacement, metal forming and flight simulation applications.

Precision ballscrew manufacturer Jena-Tec has launched a custom nut leadscrew design and manufacturing service for high speed positioning leadscrews, used in light duty applications.
Jena Tec provides ballscrew assemblies and repair services for ballscrews, spindles and linear actuators.
Its HD and VT are for a heavy duty ballscrew drive powered by any motor provided or specified by the customer.
With a heavy steel wall construction, the actuators provide from 17,000 to 178,000N for the HD range or from 1880 to 8900N for the VT range.
The heart of the actuator is powered by the firm's ballscrew assembly.
Sealed chambers extend longevity for the unit along with anti rotation devices and adjustable limit switch positions.
With travel distances up to 1200mm and velocities of 1m/s, the actuators can be customised to fit within existing production line or machine constraints, or to fit a user preference of motor type which can be adapted through the use of spacer plates.
While external cylinders are made with a hard chrome coating for corrosion resistance, special units to operate in food or corrosive environments can also be manufactured to request. For more information on this or other Jena Tec products, call us on +44(0)1623 726010

New Directions for Linear Motion

2008-09-16T04:53:00.000-07:00

Jena Tec is pleased to announce the introduction of a new range of high performance linear modules to the UK market to complement its existing range of heavy duty HD & VT linear actuators, precision ground and rolled JT series ballscrews and spindle assemblies.
The new Kinetic range of linear modules is based on the Jena Tec philosophy of providing custom options for linear module length on a quick lead time at a competitive price. 3D models are available on request for customers to evaluate and build into their CAD system design.

The Kinetic range can provide linear motion of over 6metres in length and with a choice of drive system options, both pneumatic, ballscrew, planetary roller screw, belt or high speed linear motor.
The construction uses rugged anodised aluminium extrusions which are designed within a family of sizes enabling Jena Tec to supply a modular system specifically to the customer requirements in terms of drive system, dimensions, accuracy, load capacity and speed requirements. Each range independent of drive system has multi sided T slots to allow the maximum flexibility for fixing units in position.

While this is of benefit to the factory automation and systems designers and builders, it also a key factor to satisfy the requirements of the aftermarket where Jena Tec has made its name in terms of service and performance. Jena Tec are able to offer and match an equivalent unit to replace existing linear actuators of a similar construction.
The most exciting development is the introduction of packaged linear motor modules and digital motor and drive card options which make the Jena Tec Kinetic modules a one stop shop for precision motion systems.

Highly successful in the field of pharmaceutical, medical, electronics and process industries, the Jena Tec Kinetic range provides Designers, Process and Maintenance Engineers with limitless possibilities for improving system performance.

For more information on the Jena Tec range of ballscrews, spindles and linear motion products and services, contact our sales team on +44 (0)1623 726010 or sales@jena-tec.co.uk or visit http://www.jena-tec.co.uk/

HFES Series Engraving Spindles

2008-09-16T02:16:00.000-07:00

Jena Tec is pleased to announce the introduction of the HFES high speed engraving series to complement its existing range of motorised and belt driven spindles.
Water cooled for efficiency and with manual collet tool change for economy and simplicity, the HFES range provides a modular range of high performance units for engraving, drilling and routing.
Constructed from high quality materials and bearing specifications, the units are extremely accurate and rugged for demanding applications.

SBC Linear Range Launched in UK Market

2008-09-16T01:55:00.000-07:00

Having achieved considerable success with precision ground and rolled ballscrews and machining spindles to the UK market, Jena Tec is pleased to announce its latest association representing SBC Linear Co. Ltd of Korea for the provision of high quality linear rail components and assemblies. An ideal partnership, Jena Tec is now stocking and distributing to its existing and new customers a complete range of linear motion components and assemblies including linear actuators, ballscrews, end supports, linear rails and spindles.
SBC are an established high quality Korean manufacturer of linear rail assemblies to the machine tool and automation industries. Including the C type caged ball design of carriage block for exceptional smooth running and noise reduction, additional designs are available with spacer balls for noise reduction and corrosion resistant Raydent coatings for hostile environments. Maintenance and lubrication becomes a forgotten topic with the SBC Self lube carriages utilising an impregnated fibrous media to retain lubrication within the carriage for the life of the rail.
Offering ex-stock availability of most sizes and ranges, SBC is an exciting new entrant to the UK market assisted ably by the Jena Tec team. For a high quality product offering competitive pricing and availability without compromising quality, the SBC range provides one of the best solutions in the market.

Turn Your Lathe into A Grinding Machine!

2008-09-16T00:33:00.000-07:00

Turn Your Lathe into A Grinding Machine!
Jena Tec’s range of Duplex Tool post grinding systems offer users a greatly expanded capability to adapt existing plant and equipment to have grinding capability. Offering one of the most extensive ranges, Jena Tec’s products are inherently flexible and cost effective to give all the benefits of a precision grinding process without the high cost of a cylindrical grinding machine.

Blade Tip Grinding
Aero engine and Gas Turbine repair shops are a favourite customer of Tool post grinding units where there is recognition of the cost effective method of grinding assembled rotating blades within shafts or casings using Jena Tec equipment.

We offer a range of units comprising either external, internal or dual use systems able to cope with a variety of sizes and bore depths.

Deep Hole Grinding
These quills have solved many awkward production problems, and are an invaluable accessory. They provide a means of machining a work piece without the deflection that might be caused by a cutting tool. The massive bases of the larger Duplex grinders provide adequate anchorage. They are readily interchangeable with the standard quills. High precision races are used throughout, the longer sizes having supporting bearings or bearings in the centre.

Precision Machine Shops
Boring, facing and external cylindrical grinding to precise tolerances can be achieved with the Duplex range. It makes economic sense for Precision Machine Shops to hold a Tool post unit to make maximum utilisation of existing equipment.

Abrasive Band Grinders
Abrasive Band Grinders compliment the Tool Post Grinder range to provide a range of finishing options including;
•Roll Grinding
•Surface Grinding
•Welding Boom Mounted Tank Grinding
•Robot Mounted Abrasive Grinder

Jena Tec launches new woodworking spindle range to UK market

2008-09-16T00:20:00.000-07:00

Jena Tec launch into the UK market a complete range of compact, collet mounted electric spindles and accessories by Jena Rotary Technology Ltd (Jena Tec), a worldwide leader in the design and manufacture of machining spindles and ballscrews.

The machining of wood, plastics, glass, marble and light alloys become more readily available with the use of the GCR range of modular, square bodied spindles from Jena Tec.

The fan air cooled RV & RS series are manual tool change collet units with maximum speeds of 24,000RPM and up to 16 HP at a 60% duty cycle. Robust and lightweight in a rigid extruded alunimum body the lightest unit weighs in at 1.6Kg (3.6lbs). Collet size ranges from ER11 up to ER40 with a maximum tool shaft diameter up to 25mm. This spindle range is ideal for use in machinery for processing aluminium window frame extrusions, machines for routing of plastics and wood and robotic systems for deburring where weight and ruggedness are key considerations.

Moving up to the RC series, RPM’s of 60,000 can be achieved with compressed air cooling at 90% duty cycles with similar tool diameters at much higher speeds for more intensive machining operations. Again weight considerations are paramount with a base unit starting at 3Kg (6.7lbs).
The specification and application of ceramic bearings within the GCR series allows much higher operating RPM up to 100,000.

The vast majority of the GCR spindle range is also available with auto tool changer options for ISO and HSK tool interfaces. Due to the modular nature of the spindle units, it is normally easy for existing users of machines to change an existing spindle from another manufacturer for a GCR spindle with little or no modification which is of key benefit for the end user and machine tool re-building industry.

In addition to Jena Tec’s design capability in spindle technology, they also support the product range within its manufacturing plant for service and repair of the GCR range and that of other spindle manufacturers. The launch of this exciting new product range into the UK market signals a key strengh of Jena Tec to sell, design, develop and support its product range unrivalled by competition within its field.

The GCR product line for softer materials compliments the already extensive range of units produced and supplied by Jena Tec for milling, turning and grinding of traditionally harder metals. Jena Tec supply units for a wide range of machine tool, machinery and special purpose automation. For more information contact Jena Tec at mailto:sales@jena-tec.co.uk tec.co.uk or on +44 (0)1623 726010 or visit our website at http://www.jena-tec.co.uk/

Jena Tec Assures OEM Spindle Test Quality

2008-09-15T14:18:00.000-07:00

Jena Rotary Technology Ltd (Jena Tec), part of the Avingtrans plc Technology Group, saw the final installation and commissioning of a state of the art PC based Bosch test facility for motorised spindles in its Nottingham facility in May 2006.
Jena Tec is a leading UK supplier of ballscrews and machine tool spindle repair and replacement services to the aftermarket, OEM and factory automation industries and through the investment will be able to provide customers with a quality assured documented test programme.

Conventionally, machine tool spindles are tested using individual manually operated test equipment which requires operator intervention and is laborious to document, limited in scope and can be subjective in terms of interpretation and operator recording.
The new Jena Tec Bosch test rig allows for each spindle to have a unique record and test programme which is automatically programmed through a range of test cycles unmanned. Specific data can be captured and functionality of the spindle tested including;

•Motor Current logging
•Automated run in procedure
•Bearing Temperature & Lubrication
•Vibration Monitoring
•Encoder Performance
•Tool Clamp/Unclamp either hydraulic or pneumatic
•Drawbar switch setting
•Hydraulic actuation
•Cooling efficiency
•Air purge operation

What this means to machine tool customers, be they in the Aerospace, Automotive, Woodworking, Oil/Gas or precision engineering industries is that they can be assured of an OEM standard quality test programme for their repaired spindle. This can be subsequently audited and tracked to their specific test programme providing a higher level of assurance in the work conducted by the spindle repairer.

Jena Tec supply spindle and ballscrew repair services for a wide range of machine tool, machinery and special purpose automation. For more information contact Jena Tec at sales@jena-tec.co.uk or on +44 (0)1623 726010 or go to http://www.jena-tec.co.uk/