Sprocket 20B-3 z=57 for Taper-Lock bush 5050

Product Description

Sprocket 20B-3 z=57 for Taper-Lock bush 5050 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 57 teeth and is made of C45 steel.

The sprocket has a seat for a Taper-Lock 5050 clamping bush, so it can be mounted on the shaft without boring the hole or cutting a keyway in the sprocket - simply choose a 5050 bush with a bore that matches the shaft. The bush is not included - the 5050 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.

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.

Is this sprocket available in another version?

Yes. Also available: Sprocket 20B-3 z=57 for Taper-Lock bush 4040, cast iron.

How do I mount a sprocket with a Taper-Lock bush?

Insert the bush into the sprocket seat, align the holes and lightly screw in the screws. Then slide the assembly onto the shaft and tighten the screws alternately until the bush is firmly clamped on the shaft.

Can the bush taper be greased before mounting?

No. The bush works by friction, and grease on the tapered surfaces can cause the bush to be drawn in too deep and crack the sprocket hub. The tapered surfaces must be degreased before mounting.

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.