Sprocket 28B-2 (1 3/4") z=8 with hub, C45 steel

Product Description

Sprocket 28B-2 (1 3/4") z=8 with hub, C45 steel works with 28B-2 roller chain (European standard DIN 8187 / ISO 606), double-strand (duplex), with a pitch of 44.45 mm (1 3/4"). It has 8 teeth and is made of C45 steel.

The sprocket has a one-sided hub with a diameter of 74 mm and a pilot bore of Ø25 mm, which is bored to the shaft size and completed with a keyway or a set screw hole. The total width of the sprocket is 120 mm.

Technical data

Applications

It is found in transmissions of industrial machinery that transfer high torque. The double-strand version carries higher loads than a single-strand one of the same pitch.

Frequently asked questions

Which chain does the 28B-2 z=8 sprocket fit?

28B-2 roller chain to European standard DIN 8187 / ISO 606, with a pitch of 44.45 mm. A duplex sprocket requires a double-strand (duplex) chain.

Does it fit ASA 140 chain?

No. ASA 140 chain (American standard) has the same pitch, but a different roller diameter (25.4 mm instead of 27.94 mm) and a different inner width (25.4 mm instead of 30.99 mm). The 28B sprocket is designed for European-standard chain, so the two systems should not be mixed.

When does a sprocket need replacing?

It should be replaced 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.

Can a new chain be fitted on a worn sprocket?

This should not be done. A worn sprocket has a changed tooth profile, so a new chain runs unevenly and elongates quickly. The rule is: new chain - new sprockets.

What causes wear on the sides of the teeth?

Most often misaligned sprockets. The chain does not run straight and its plates rub against the sides of the teeth. In this case the sprockets must be realigned in one plane.

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.