Pillow blocks (also known as Pedestals) are the most common method of mounting Cooper split roller bearings (usually supplied in cartridges).
Cooper standard pillow blocks are shown in the adjacent tabs. Pillow blocks with height-to-centre and bolt hole configurations to match industry standard SN, SD and SAF pillow blocks are shown separately.
Pillow blocks are common between expansion (EX) and fixed (GR) units.
The maximum safe radial load for a pillow block is based on the static rating (Cor) of the corresponding size of roller bearing. The full static rating can be applied if the angle of the load falls within the shaded area of the sketch below.
If the radial load falls outside the shaded area, if the radial load exceeds Cor or if the axial loads exceed 50% of the axial rating (Ca) of the corresponding roller bearing, please consult our technical department. For 100 Series bearings, the maximum axial load is reduced to 35% Ca.
Pillow blocks should be fully supported on a flat, rigid surface to avoid distortion of the pillow block or deflection under load.
For loads within 45° of the horizontal, the base should be chocked or dowelled.
Standard Cooper pillow blocks are manufactured from grey iron. Ductile iron and steel pillow blocks are also available and should be considered for shock or pulsating loads.
Particulars of pillow blocks in alternative materials are available from our technical department.