Sprocket 20B-2 z=21 for Taper-Lock bush 3030 hardened

Product Description

Sprocket 20B-2 z=21 for Taper-Lock bush 3030 hardened works with 20B-2 roller chain (European standard DIN 8187 / ISO 606), double-strand (duplex), with a pitch of 31.75 mm (1 1/4"). It has 21 teeth and is made of C45 steel. The sprocket is hardened, which increases the wear resistance of the teeth.

The sprocket has a seat for a Taper-Lock 3030 clamping bush, so it can be mounted on the shaft without boring the hole or cutting a keyway in the sprocket - simply choose a 3030 bush with a bore that matches the shaft. The bush is not included - the 3030 bush can be purchased separately from our range.

Technical data

Applications

It is designed for heavy-duty drives: aggregate conveyors, construction machinery and mining equipment. The double-strand version carries higher loads than a single-strand one of the same pitch.

Frequently asked questions

Which chain does this sprocket fit?

20B-2 roller chain to European standard DIN 8187 / ISO 606, with a pitch of 31.75 mm. A duplex sprocket requires a double-strand (duplex) 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.

Is this sprocket available in another version?

Yes. Also available: Sprocket 20B-2 z=21 for Taper-Lock bush 3030.

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.

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.