28B-1 simplex hub sprockets

28B-1 hub sprockets are simplex sprockets for 28B-1 chain of 1 3/4" (44.45 mm) pitch to DIN 8187 / ISO 606. The large pitch allows very high forces to be transmitted with a single chain strand, which simplifies the drive design.

28B-1 sprocket - the widest choice of tooth counts in the 28B size

It is among the simplex sprockets that you will find the widest choice of tooth counts in the 28B size, which makes it easy to select the transmission ratio. You bore out the pilot bore for your shaft, and the massive C45 steel hub reliably transmits high torque.

28B-1 simplex sprockets in C45 steel with a massive hub

28B-1 simplex hub sprockets in C45 steel with unhardened teeth. 28B simplex sprockets with hardened teeth can be found in the Hardened hub sprockets group, and plate wheels - in the Plate sprockets group.

28B-1 simplex sprockets - customer questions

How do I check whether a 28B-1 sprocket is already worn?

Worn teeth are pointed, have clearly worn flanks or are hook-shaped. If the chain rides up onto the tooth tips or jumps teeth, the sprocket must be replaced.