081 (1/2") hub sprockets

081 hub sprockets work with 081 roller chain of 1/2" (12.7 mm) pitch, described in DIN 8187 / ISO 606. This chain has a small inner width, so the sprocket has a thinner tooth rim than an 08B sprocket and is not interchangeable with it.

081 hub sprockets - narrow chain drives and parts for older machines

A narrow chain lets you build a drive where width is limited, and the 081 sprocket is often the only spare part that fits older machines and vehicles. You bore out the pilot bore for your shaft, and C45 steel ensures durability.

081 hub sprockets in C45 steel with unhardened teeth

081 simplex hub sprockets in C45 steel, with unhardened teeth, in a wide choice of tooth counts. Hub and rim dimensions are given on the product page.

How to tell 081 chain from 08B - frequently asked questions about 081 sprockets

How do I tell 081 chain from 08B?

Both have a 12.7 mm pitch, but 081 chain has a smaller roller and a clearly narrower inner plate spacing. The simplest way is to measure the inner width of the chain.