2-50
Engineering Guide CDA3000
2 Drive definition
Circumferential backlash
The circumferential backlash of a gear is the angular tolerance between
the output and the drive, referred to the output shaft with the drive blocked
and a torque of approx. 3 to 5% of the nominal torque of the gear.
➢ Figures are always absolute values and in angle minutes.
➢ Figure is obtained with drive shaft stopped.
➢ Figure relates to the output and is obtained by means of an alterna-
ting load of approx. 3 to 5% M
max
.
Torsional rigidity
Torsional rigidity is the torsion of a gear relative to the loading.
➢ Figure always in Nm per angle minute.
➢ Figure is obtained with drive shaft stopped.
➢ Figure relates to the output and is obtained by means of an alterna-
ting load of approx. 0 to 100% M
max
.
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