No load running torque

The no load running torque is the torque required to maintain rotation of the input element (high speed side) at a defined input speed with no load applied to the output.

No load starting torque

The no load starting torque is the quasi­static torque required to commence rotation of the input element (high speed side) with no load applied to the output element (low speed side).

Rated torque

The rated torque is a reference torque for the calculation of the gear's lifetime. When loaded with the rated torque and running at rated speed the gear will achieve the lifetime.

Peak torque

The peak torque is the allowable output torque that can be developed during acceleration or deceleration. The peak torque that occurs during starting or stopping can be calculated if the static load, load moment of inertia and acceleration (or deceleration) time are known. This torque limit must not be exceeded during the normal operating cycle.

Momentary peak torque

The momentary peak torque is close to the ratcheting torque. The magnitude and frequency of such peak torques must be kept to a minimum and they should under no circumstance occur during the normal operating cycle but only in the event of collision or emergency stop.