Steel 1.0503 (C45).

Milled toothing, straight teeth.
Engagement angle 20°, bright.

Up to 70 teeth with hub, from 72 teeth disc form.

The spur gears have a centre bore or are pre-drilled (this may vary depending on the manufacturing process). For this reason, the dimension D2 max. given in the table is the maximum diameter of the bore that the spur gears are supplied with. This pilot hole/centre bore can be customised with a reamed hole, reamed hole with keyway or a tapped hole by the customer.
In order to achieve exact concentricity between the toothing and the bore, we recommend enlarging the pilot hole to the required diameter on a lathe. Alternatively, bushes can be fitted by the customer to reduce the diameter.

Form A: with hub
Form B: without hub