Sprocket 20B-1 (1 1/4") z=20 with hub, bore 48 mm with keyway, C45 steel

Product Description

Sprocket 20B-1 (1 1/4") z=20 with hub, bore 48 mm with keyway, C45 steel fits 20B-1 roller chain (European standard DIN 8187 / ISO 606), single-strand (simplex), with a pitch of 31.75 mm (1 1/4"). It has 20 teeth and is made of C45 steel.

The sprocket has a hub with a finished bore of 48 mm and a keyway, so it can be fitted straight onto a shaft of this diameter - without boring the hole or cutting a keyway. The hub diameter is 120 mm and the total width of the sprocket is 50 mm.

Technical data

Applications

It is found in transmissions of industrial machinery that transfer high torque.

Frequently asked questions

Which chain does the 20B-1 z=20 sprocket fit?

20B-1 roller chain to European standard DIN 8187 / ISO 606, with a pitch of 31.75 mm. A simplex sprocket requires a single-strand (simplex) chain.

Which shaft does this sprocket fit?

The sprocket has a finished bore of 48 mm with a keyway, so it is mounted on a 48 mm shaft with a key. Before ordering, it is worth measuring the shaft carefully with a caliper in several places.

Does it fit ASA 100 chain?

No. ASA 100 chain (American standard) has the same pitch and roller diameter, but a different inner width (19.05 mm instead of 19.56 mm). The 20B sprocket is designed for European-standard chain, so the two systems should not be mixed.

Can a sprocket with hub be welded to the shaft?

Technically it is possible, but we do not recommend it. Welding overheats the material, can bend the shaft and damage nearby bearings, and makes later replacement of a worn sprocket very difficult. It is better to fix the sprocket with a key.

How should sprockets be aligned during installation?

The driving and driven sprockets must lie in one plane. Alignment can be checked with a long steel straightedge placed against the sides of both wheels or with a laser alignment tool. Even a small misalignment wears the sides of the teeth and speeds up chain wear.

What does the lead time depend on?

When ordering, please check the current stock level of this sprocket - the lead time depends on it and is clearly stated according to the quantity available in each warehouse. The stock level is shown above the product price and may vary depending on the warehouse.

Product photos are for illustration purposes only.