Press releases on Bornemann Gewindetechnik
Please find the latest press releases on Bornemann Gewindetechnik here.
Diamond threads for offshore winches
Since more than 25 years Bornemann Gewindetechnik manufactures self reversing screw shafts also known as diamond screw shafts and spooling nuts as parts for so called spooling shafts or level winders of large winches for the offshore industry.
Released by Bornemann Gewindetechnik 09/2010
Avoiding the stick-slip effect
Bornemann Gewindetechnik GmbH & Co. KG, based in Delligsen, Lower Saxony, has been producing threaded spindles and screw conveyors for more than 25 years. One of their main products is ready-to-install trapezoidal spindle drives for heavy-duty lifting gear, as used to lift rail vehicles. Constant lubrication of the load-bearing flanks of the thread profiles is essential for spindle lift drives, as insufficient lubrication can lead to increased wear and overheating as well as the so-called stick-slip effect.
Released in InnoTrans daily 09/2010
Excellent spindles for lifting jacks
Nowadays lifting jacks are usually used for lifting rolling stock for maintenance purposes. This is done either by mobile or underfloor screw jacks all of which use trapezoidal spindles to carry the load. For the reliable operation of these threaded spindles, several factors need to be considered right from the start in order to avoid the dreaded stick-slip in the aftermath. The stick-slip is caused by two surfaces alternating between sticking to each other and sliding over each other, with a corresponding change in the force of friction. This can lead to vibrations that are emitted as noise ("squeaky" spindles) and in the worst case it can even lead to cold welding of the lifting nut and spindle – completely destroying the lifting jack.
Released by Bornemann Gewindetechnik 09/2010
How to avoid the stick-slip effect in spindle lifting jacks?
The avoidance of the dreaded stick-slip effect is key when heavy loads are lifted. In mechanical lifting systems where trapezoidal spindles are used it is important to consider certain factors already in the design phase in order to avoid serious problems in the aftermath.
Released by Bornemann Gewindetechnik 09/2010
