Finest precision for heavy loads

THE EXPANSION OF a high speed rail network is progressing in Europe and Russia. The threaded screws used in the lifting jacks for the maintenance of trains must be able to withstand extreme loads and on the other hand, work precisely in order to prevent jamming.

Here, the whirling manufacturing process has established itself as a superior one for the screws, as proven by the success of Bornemann Gewindetechnik GmbH & Co KG within last few decades. Bornemann developed an expertise in the manufacturing of threaded screws for heavy duty lifting jacks.

“Bornemann screws have an accuracy of 0.5 millimeter over a length of 5,000 millimeter, compared to rolled screws with an accuracy of +/- 2.5 millimeter, therefore they can realize a very good synchronized speed which is required when several lifting jacks are lifted in parallel for train sets or multiple units (DMU''s or EMU''s).”, says Moritz von Soden, Head of Sales at Bornemann Gewindetechnik (www.bornemann.de).

Excellent lubrication characteristics - a critical key point especially when load reserves are getting smaller

Bornemann screws can prevent the dreaded Stick-Slip effect with heavy loads. This effect occurs especially with threads made by rolling process. They require far more lubrication due to the absence of the microscopic lubrication pockets which are always present with threads manufactured by Bornemann.

»Load reserves are getting smaller and lifting systems are increasingly designed for very specific train types with defined loads, therefore it is crucial for us that the performance of our lifting jacks is not compromised by lubrication problems when we reach the maximum contact pressure per unit area." adds Clinton Capelli, Engineer at Vector Lifting.

Bornemann Gewindetechnik GmbH & Co. KG

http://www.bornemann.de

Sergii Goman