With reduced backlash

Helical gear units, parallel-shaft helical gear units, and helical-bevel gear units with reduced backlash (only K..7) are available as of gear unit size 37.

The rotational clearance of these gear units is significantly smaller than that of the standard designs which means that positioning tasks can be solved with great precision. The rotational clearance φ_(/R) is specified in angular minutes in chapter "Geometrically possible combinations". The rotational clearance for the output shaft is specified without load (max. 1% of the rated output torque); the gear unit input end is blocked. The specified values have a tolerance of ± 2 angular minutes.

For more information, refer to chapter Gear unit dimensions for reduced backlash.