H 150 pilot bore timing pulleys

H 150 pilot bore timing pulleys work with 1 1/2" (38.1 mm) wide H belts. They have a pilot bore that lets you match the pulley to a shaft of non-standard diameter, including imperial.

H 150 pilot bore timing pulley - fits without adapter bushes

You decide on the bore diameter and fit yourself, so the pulley fits the machine without adapter bushes. It is a good solution when repairing older equipment whose shafts have non-standard dimensions. Smaller pulleys are made of C45 steel, and larger ones of grey cast iron.

H 150 synchronous pulleys with a pilot bore for boring out

H 150 pulleys with a pilot bore, in a wide choice of tooth counts. The bore is machined to the shaft size, and the keyway is made to DIN 6885. With large pulleys running at high speed, it is worth checking runout and balance after machining.

Frequently asked questions about H 150 pilot bore timing pulleys

Is a pilot bore pulley more accurate than a bush-mounted one?

A well-bored hole ensures very low runout. A bush-mounted pulley is installed faster, but requires a bush matching the pulley seat size.