03-1 (5 mm) hub sprockets

03-1 hub sprockets are the smallest sprockets in our range. They work with 03 simplex roller chain of 5 mm pitch, described in DIN 8187 / ISO 606, which is used in light mechanisms of compact design.

03-1 (5 mm) hub sprockets - a miniature drive without slip

A miniature chain drive transmits motion without slip, like a toothed belt, but copes better with dirt and elevated temperature. C45 steel sprockets are durable, and the pilot bore is easy to bore out for a small shaft - so you can match the sprocket to a motor or mechanism without looking for non-standard parts.

03-1 hub sprockets in C45 steel for automation and models

03-1 simplex hub sprockets in C45 steel, with unhardened teeth, in a wide choice of tooth counts. They are used in measuring equipment, automatic machines, models and precision mechanics. Hub dimensions are given on the product page.

03 sprocket vs 04 chain - customer questions about small sprockets

Does an 03 sprocket fit 04 chain?

No. 03 chain has a 5 mm pitch, while 04 chain has a 6 mm pitch. Sprockets for 04 chain can be found in the 04-1 group.