Timing belt pulley H 300 z=49, cast iron

Product Description

Timing belt pulley H 300 z=49, 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.

The pulley performs well wherever precise motion synchronisation is required: 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.

Timing pulley H z=49 - bore for reboring

FAQ

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.

How do you choose a pulley for a toothed belt?

The key is matching the series (H = pitch 1/2" (12.7 mm)) and the belt width (300 mm). The drive ratio is calculated by dividing the number of teeth of the driven pulley by the number of teeth of the driving pulley.

How can you recognise a worn pulley groove?

If the bottom of the groove is shiny, the belt has bottomed out and no longer wedges against the flanks - the pulley needs replacing. Profile gauges are used for checking.

How does excessive belt tension affect the bearings?

Excessive radial force puts high loads on the bearings, leading to overheating and premature failure. The correct tension is specified by the belt manufacturer.