By reducing the volume of internal cavities in its new GTM planetary
gearbox, Rexroth has managed to cut the unit's noise output to a minimum
Rexroth's new GTM planetary gearbox range is one its quietest yet, thanks
to a design that has reduced the volume of internal cavities to an
absolute minimum. And thanks to some interesting mechanical features, the
company is claiming exceptionally high reliability for this precision
servomotor gearbox.
The gearbox shafts, for example, run within large taper bearings, which
provide two important benefits. Firstly, they allow the transmission of
higher radial and axial loads, and secondly, they provide a lubricant
pumping action, which is very useful when operating the gearbox in
vertical or angled applications.
A special coupling arrangement with the sun gear, moreover, ensures a
high emergency stop torque. And while most planetary gearboxes will lose
accuracy after just one emergency stop, the GTM will actually endure
1,000 such stops before its accuracy is compromised.