12B-1 simplex hub sprockets

12B-1 hub sprockets are simplex sprockets for 12B-1 chain of 3/4" (19.05 mm) pitch to DIN 8187 / ISO 606. They are a frequent choice in medium-sized agricultural and industrial machine drives.

12B-1 sprocket - a transmission ratio matched exactly to your needs

A wide choice of tooth counts lets you match the transmission ratio exactly to your needs. You bore out the pilot bore for your shaft and cut the keyway to DIN 6885 - the sprocket also fits non-standard diameters. Larger sprockets can be chosen in grey cast iron - they run more quietly.

12B-1 simplex sprockets with a pilot bore

12B-1 simplex hub sprockets in C45 steel with unhardened teeth, and larger grey cast iron sprockets. 12B-1 sprockets with a finished bore can be found in the Finished bore sprockets group.

Frequently asked questions about 12B-1 simplex sprockets

Can I replace a 12B-1 sprocket with a hardened one without changes to the machine?

Yes. Hardened sprockets from the Hardened hub sprockets group have the same tooth profile and are interchangeable - they differ in tooth hardness, not in connection dimensions.