12B-2 duplex Taper-Lock sprockets

12B-2 Taper-Lock sprockets are duplex sprockets for 12B-2 chain of 3/4" (19.05 mm) pitch to DIN 8187 / ISO 606. A duplex drive transmits high forces while keeping sprocket diameters moderate.

12B-2 duplex Taper-Lock sprockets - fitting with no turning or slotting

A sprocket with a Taper-Lock seat is fitted to the shaft without turning or slotting, and after years of service it comes off without a puller. Smaller driving sprockets are available with hardened teeth, and large driven sprockets in grey cast iron, which reduces cost and dampens vibration well.

12B-2 taper bush sprockets in C45 steel, hardened and in grey cast iron

12B-2 duplex sprockets in C45 steel, selected ones also with hardened teeth, and large sprockets in grey cast iron.

Aligning the sprocket with the chain - questions about 12B-2 duplex sprockets

How do I align the sprocket with the chain?

Before finally tightening the bush, place a straight edge against the faces of both drive sprockets and slide the sprocket along the shaft until the tooth rims lie in one plane. Only then tighten the screws alternately.