08B-1 hardened hub sprockets

08B-1 hardened hub sprockets are simplex sprockets for 08B-1 chain of 1/2" (12.7 mm) pitch to DIN 8187 / ISO 606, with induction-hardened teeth. This is one of the most popular sizes of hardened sprockets.

Hardened 08B-1 sprocket - a transmission ratio matched almost tooth for tooth

A wide choice of tooth counts lets you match a hardened driving sprocket almost exactly to the required transmission ratio. Hard teeth wear more slowly, while the C45 steel hub remains unhardened - you bore the hole to the shaft size and cut a keyway to DIN 6885.

08B-1 simplex sprockets in C45 steel with hardened teeth

08B-1 simplex sprockets in C45 steel with teeth hardened to 45-55 HRC. Equivalents with unhardened teeth can be found in the Hub sprockets group, and sprockets with a finished bore - in the Finished bore sprockets group.

08B-1 hardened simplex sprockets - customer questions

How can I tell that a sprocket is hardened?

Information about hardening is given in the product name. On the sprocket itself, the hardened zone may be visible as discoloration at the base of the teeth.