Kuroda Jena Tec : Principles of Ballscrew Repair

Kuroda Jena Tec's ball screw repair technicians can recondition or repair ballscrews of any make or configuration with a range of transfer systems. At our specialised repair and testing facilities, we can recondition ballscrews up to 15m in length and 200mm in diameter. Additionally, we can replace ballscrews, offering a re-engineered matched replacement utilizing our existing inventory, up to 80mm in diameter.

Every repair evaluation includes a health check and free of charge assessment report. Our skilled technicians will disassemble, clean, inspect and determine cause of failure. The ballscrew is initially inspected for shaft straightness, bearing journal total indicated runout (TIR), fine thread and journal condition and wear to the shaft.

The ballscrew is then stripped and all parts are vapour de-greased and checked internally for Ball transfer system damage, Brinelling, fatigue, corrosion and damage to raceways. Each individual ballscrew shaft raceway is then polished, fine threads are cleaned and dressed out if necessary. The ballscrew is reassembled using new, high quality chrome steel balls to the correct pre-load specification. Lastly, the ballscrew is put through a series of tests and one final inspection to ensure precision and quality. If it is predetermined that the ballscrew is beyond economical repair, Kuroda Jena Tec offers reverse engineering and will quote for a replacement ballscrew manufactured in accordance with the sample. This should also be considered if the ballscrew is in a poor but running condition. Ballscrew sizes in diameter up to 80mm and in precision grade are held in stock in the UK and USA which can be retrofitted for replacements. Sizes over this diameter are supplied through Kuroda Jena Tec's German facility supported by the regional technical office. Warranties offered on repair services are dependent on repair assessment, ranging from zero warranty (where a replacement is recommended) to 6 months maximum. For more details on how Kuroda Jena Tec can supply your requirements please visit our websites on www.jena-tec.com www.jena-tec.co.uk www.jena-tec.de

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

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/