Sprocket 20B-3 z=45 for Taper-Lock bush 4040, cast iron

Product Description

Sprocket 20B-3 z=45 for Taper-Lock bush 4040, cast iron fits 20B-3 roller chain (European standard DIN 8187 / ISO 606), triple-strand (triplex), with a pitch of 31.75 mm (1 1/4"). It has 45 teeth and is made of EN-GJL-250 cast iron.

The sprocket has a seat for a Taper-Lock 4040 clamping bush, so it can be mounted on the shaft without boring the hole or cutting a keyway in the sprocket - simply choose a 4040 bush with a bore that matches the shaft. The hub diameter is 216 mm and the total width of the sprocket is 102 mm. The bush is not included - the 4040 bush can be purchased separately from our range.

Technical data

Applications

It is used in sawmills, cement plants and bulk material handling lines. The triple-strand version is chosen for very heavily loaded drives where there is no room for a chain with a larger pitch. The cast iron design works well for large sprockets in reduction gears, where rigidity and vibration damping matter.

Frequently asked questions

Which chain does this sprocket fit?

20B-3 roller chain to European standard DIN 8187 / ISO 606, with a pitch of 31.75 mm. A triplex sprocket requires a triple-strand (triplex) chain.

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.

Does the bush connection need to be checked during operation?

Yes. After the first period of operation, and later during inspections, it is worth checking that the bush screws are tight. In drives operating at higher temperatures, a check after the first warm-up is especially important.

Can a Taper-Lock bush be reused?

Yes, if it has not been mechanically damaged. Easy dismounting and remounting is one of the main advantages of this system.

How do I check the pitch of a sprocket?

The sprocket pitch matches the chain pitch - it is the distance between the centres of adjacent teeth measured on the pitch circle. The easiest way to check it is to place a section of matching chain on the sprocket: it should sit on the teeth without tension. This sprocket has a pitch of 31.75 mm (1 1/4").

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.