Sprocket 20B-2 z=76 for Taper-Lock bush 3535, cast iron

Product Description

Sprocket 20B-2 z=76 for Taper-Lock bush 3535, cast iron fits 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 76 teeth and is made of EN-GJL-250 cast iron.

The sprocket has a seat for a Taper-Lock 3535 clamping bush, so it can be mounted on the shaft without boring the hole or cutting a keyway in the sprocket - simply choose a 3535 bush with a bore that matches the shaft. The hub diameter is 175 mm and the total width of the sprocket is 89 mm. The bush is not included - the 3535 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. 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-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.

How does the number of teeth affect the drive ratio?

The ratio is the number of teeth of the driven wheel divided by the number of teeth of the driving wheel. If this sprocket drives a wheel with twice as many teeth, the driven shaft turns twice as slowly but with roughly twice the torque.

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.

When does a sprocket need replacing?

When the teeth start to look like pointed shark fins or are clearly bent to one side. Running on such a profile quickly destroys even a new chain, so a worn sprocket must be replaced. Thanks to the Taper-Lock bush, replacement is quick.

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.