Gearboxes

Rollstar planetary gearboxes are space-saving drives for high torques at low weight and minimum dimensions. Built on modular basis and with different ratios for almost every design size, thus nearly infinite possibilities of combinations which enable to realize the from customer requested gearbox ratio.

Planetary gearboxes are adapted to mount onto Rollstar hydraulic motors. However, even mounting of any brand of motor, hydraulic or electric and according your specification is possible.

Furthermore, it does exist a large number of design variants for output side, do not hesitate to contact us concerning specific requirement.

Rollstar planetary gearboxes are available up to maximum output torque of 6.5 million Nm.

Shiftable planetary gearboxes are available in combination with our hydraulic motors as well as gearbox only. These types of planetary gearbox are shiftable only while standstill and available in two or three stage version. Gear shift version can be hydraulic or manual. Our standard shiftable gearboxes are available up to maximum output torque of approx. 7’500 Nm. Thanks to their compact design, shiftable gearboxes are often applied in earth drilling application such as the top drive of drilling rigs.

Moreover Rollstar continuously develops solutions for shiftable planetary gearboxes of heavy duty size, currently up to maxmimum output torque of 300’000 Nm.

Do not hesitate to contact us concerning specific requirement.