By continuously compensating for all stretching, hopping, fluttering, and excessive pull when starting, thanks to its preloaded suspension system with high self-damping, the Lovejoy ROSTA tensioning motorbase is the ideal answer for belt drives for motors.
Belt drives, in particular V-belt drives with one or more belts, transmits the required torque to the driven equipment only if the belt tension is optimum. Consequently all such drives need a device for adjusting the motor position or a belt tensioner to compensate for normal belt stretch (with V-belts up to 4 to 5% of total length).
Failure to adjust the tension leads to serious loss of power in torque transmission, overheating of belts due to excessive slip, hopping, screeching belts, excessive wear of the pulleys and eventually premature failure. Purely mechanical, rigid adjusting devices like motor slides with screw adjustments or belt tensioners with adjusting slots are intended only for occasional compensation of the belt stretching. They do not provide continuous re-tensioning of the belts or reduction of the excessive starting torques when pulling heavy equipment into operation. They also require frequent adjustments and maintenance, which requires the drive to be shut down.
Please download catalog for sizing and dimensional data.