XH 400 pilot bore timing pulleys

XH 400 pilot bore timing pulleys are steel pulleys for the widest XH belt (4", i.e. 101.6 mm), supplied with a pilot bore.

XH 400 pilot bore timing belt pulleys - a key matched to high torque

You machine the bore exactly for the machine shaft, inch shafts included, and choose the length and type of key for the very high torque the wide belt transmits. C45 steel provides the strength required in the heaviest drives. Accurate seating of the pulley on the shaft reduces runout, which has a major effect on the life of such a wide belt.

XH 400 timing pulleys with a pilot bore - keyway along the full hub length

XH 400 pulleys made of C45 steel with a pilot bore. The bore is machined for the shaft, usually to an H7 tolerance, and the keyway is cut to DIN 6885. With such a wide pulley, it is worth using a key along the full length of the hub.

How do I align a wide XH 400 synchronous pulley? Customer questions

How do I align a wide pulley on the shaft?

The pulley must lie exactly in one plane with the mating pulley. Check this with a straightedge placed against both tooth rims before fitting the belt.