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Pillow Blocks (Bearing Blocks)

Pillow Blocks (Bearing Blocks)

Pillow blocks (also called bearing blocks) hold a shaft bearing in a ready-made housing, so a shaft can be positioned and supported without machining a bearing bore into your own frame or structure. Our aluminium pillow blocks come with the ball bearing already fitted, in 6mm and 8mm bore sizes.

Flexible mounting

Each block has both vertical and horizontal mounting holes, so you can bolt it down in whichever orientation suits your assembly. The bearing itself is mounted asymmetrically on the block's vertical centre-line, giving you a choice of shaft mounting heights from the same part. Zinc-plated M5 fixings are supplied for mounting through either set of holes.

Bearing Block Example

Features

Bearing Block Example
Dimensions for Blocks with 6mm and 8mm bore bearings
Part Number Bearing Internal Diameter Bearing Type
"b"		 Max Radial Load Kgf Max Axial Load Kgf Max RPM (x1000)
Dynamic Static
BB06M 6mm 626ZZ 233 89 22 40
BB08M 8mm 698ZZ 221 89 22 43

Mounting and alignment

Each pillow block should be fixed to a flat, rigid surface using the M5 fixings supplied — through either the vertical or horizontal mounting holes, depending on which orientation your assembly needs. Because the bearing is mounted asymmetrically on the block's centre-line, rotating the block between its two mounting options also changes the shaft height, so you can fine-tune alignment without adding shims or spacers. For multi-shaft assemblies, make sure all pillow blocks supporting the same shaft are mounted at the same height and are square to the shaft's axis — a shaft under load will bind or wear unevenly if the supporting blocks aren't aligned.

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