Timing belt pulley PolyChain GT PC 14M 68 z=38 Steel

Product Description

Timing belt pulley PolyChain GT PC 14M 68 z=38 Steel - for HTD 14M / PolyChain GT belts with a pitch of 14 mm (HTD). Made of C45 steel with a profile optimised for Gates PolyChain GT polyurethane belts.

The pilot bore allows the pulley to be bored precisely to the shaft size and the fit required by the machine, to H7 tolerance. The keyway is cut on a slotting machine according to DIN 6885.

Typical applications: heavy industrial drives, presses, agricultural and construction machinery.

When ordering, please check the lead time - it is shown directly next to the product's stock level.

PolyChain GT pulley 8M 68 mm, 38 teeth - pilot bore

FAQ

How does PolyChain GT differ from an HTD 8M pulley?

The pitch is identical (8 mm), so the pulleys have the same overall dimensions - but the tooth profile is optimised for the Gates PolyChain GT polyurethane belt. PolyChain and HTD 8M pulleys are not interchangeable - use only PolyChain pulleys with a PolyChain belt.

Can I use an HTD 8M belt on a PolyChain GT pulley?

We do not recommend it. The tooth profile of a PolyChain pulley differs from that of a conventional HTD pulley - the belt will fit on the pulley but will not sit optimally in the teeth, which will shorten its service life and may lead to tooth skipping under load.

What is a pilot bore and how is it rebored?

A pilot bore is a technological bore smaller than the target shaft diameter - a turner rebores it precisely to the specific shaft, to H7 tolerance. The keyway is cut on a slotting machine according to DIN 6885.

How do you align pulleys correctly?

The grooves of both pulleys must lie in one plane. Check this with a straightedge or a laser alignment tool. Even a slight lateral misalignment causes rapid wear of the belt's side edges.