Sprocket 12B-3 (3/4") z=25 with hub, C45 steel

Product Description

Sprocket 12B-3 (3/4") z=25 with hub, C45 steel is designed for 12B-3 roller chain (European standard DIN 8187 / ISO 606), triple-strand (triplex), with a pitch of 19.05 mm (3/4"). It has 25 teeth and is made of C45 steel.

The sprocket has a one-sided hub with a diameter of 120 mm and a pilot bore of Ø20 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 70 mm.

Technical data

Applications

It works well in roller and belt conveyor drives and on packaging 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 the 12B-3 z=25 sprocket fit?

12B-3 roller chain to European standard DIN 8187 / ISO 606, with a pitch of 19.05 mm. A triplex sprocket requires a triple-strand (triplex) chain.

Does it fit ASA 60 chain?

No. ASA 60 chain (American standard) has the same pitch, but a different roller diameter (11.91 mm instead of 12.07 mm) and a different inner width (12.7 mm instead of 11.68 mm). The 12B sprocket is designed for European-standard chain, so the two systems should not be mixed.

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.

How do I check sprocket run-out after installation?

A dial indicator on a magnetic stand is used. Place the tip against the rim or side of the sprocket and turn the shaft, reading the deviations. Excessive run-out usually means a crooked bore or a damaged shaft.

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.