SPZ pilot bore V-belt pulleys

SPZ pilot bore V-belt pulleys are pulleys for SPZ and XPZ belts with a pilot bore that you bore out to the shaft diameter and add a keyway to. They solve the problem of a non-standard shaft - you can match the pulley to it exactly without searching for a bush with the right bore.

SPZ pilot bore pulley - simple and durable keyed mounting

After machining, you mount the pulley directly on the shaft with a key, without any additional parts, creating a simple and durable connection. It is a good solution when repairing older machines and where the pulley is to run for years without being removed. Grooves made to the standard accept SPZ or XPZ belts from any manufacturer.

SPZ V-belt pulleys with a bore for machining, single and multi-groove

Single and multi-groove SPZ pilot bore pulleys in various diameters. The diameter and number of grooves are given in the pulley name, and exact dimensions - on the product page. Pulleys mounted without machining can be found in the SPZ Taper-Lock pulleys group.

Questions and answers: SPZ pilot bore V-belt pulleys

How do I prepare the pulley for installation?

Bore out the hole on a lathe concentric with the belt grooves so that the pulley does not run out, then cut a keyway for the key on the shaft. Finally, secure the pulley against moving along the shaft, e.g. with a set screw.