Finer Power SPB Pilot Bore V-Pulley, 1 / 80

These cast iron SPB pilot bore V-pulleys suit B and SPB V-belts. The range covers 12 models from 80 to 150mm pitch circle diameter (PCD), with 1 to 2 grooves.

A pilot bore pulley has a small starter hole through the hub. You machine the hole out to your shaft size and cut a keyway. The starter hole size, hub diameter and overall length come in each model. The PCD is the diameter the belt runs on and sets the speed ratio of the drive. Use one groove for each belt.

Where this product is used

• Fan, blower and pump drives
• Light machinery and general drives with a custom shaft size
• Replacement pulleys on existing SPB belt drives
• Drives where the shaft does not suit a taper lock bush

Features

• Pilot bore hub for machining to your shaft size
• SPB V-belt grooves, 1 to 2 grooves
• 12 models, 80 to 150mm PCD
• Cast iron construction
• Starter hole, hub diameter, overall length, face width and outside diameter for every model
• Approximate mass for every model

Key specifications

Sizes available

Choosing the right option

Choose the pulley by belt section (SPB), pitch circle diameter and number of grooves. Divide the driven PCD by the driver PCD to find the speed ratio.

The starter hole is machined out to your finished bore size, so check the hub leaves enough wall around the bore and keyway. If your shaft suits a taper lock bush, the taper lock version gives a wider choice of bore sizes: see the SPB Taper Lock V-Pulley, Cast Iron, 1 to 10 Grooves, 75 to 1250mm PCD.

Machine the starter hole to your shaft size with the pulley held true, and cut the keyway to suit. Check the finished bore leaves enough hub wall for the keyway. Fix the pulley to the shaft by the method your drive uses, and align it with its mating pulley before fitting the belts.

Dimensions are for reference.