Timing belt pulley H 300 z=70, cast iron

Product Description

Timing belt pulley H 300 z=70, cast iron - for H belts with a pitch of 1/2" (12.7 mm). Made of grey cast iron with a pearlitic structure.

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.

Designed for synchronous drives in: heavy industrial drives, agricultural machinery, machine tools, presses.

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

Cast iron synchronous pulley H 300 mm, z=70

FAQ

What materials do you use for pulleys?

Cast iron dampens vibrations excellently, is resistant to abrasion and dissipates the heat generated by belt friction very well - ideal where quiet and stable drive operation matters.

Does shaft runout damage pulleys?

Yes - shaft runout causes cyclic jerking of the belt, which leads to cracking of the pulley hub and accelerated belt wear. Before mounting the pulley, it is worth checking the shaft runout with a dial indicator.

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.