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Two-bearing housings, PD series

Two-bearing housings, PD series

SKF two-bearing housings were originally developed for fan shafts with an overhung impeller, but are also suitable for other applications with similar shaft arrangements.

Compared to the conventional shaft arrangement where two self-aligning bearings are mounted in separate plummer (pillow) block housings, two-bearing housings provide several advantages including improved running accuracy and quieter operation.

PD two-bearing housings can also be supplied as ready-to-mount units.

Bearing types

Single row deep groove ball bearings

Single row angular contact ball bearings

Single row cylindrical roller bearings

Bearing dimension series

62, 63

72, 73

NU 22, NU 3, NJ 22, NJ 23, NJ 2, NJ 3

Shaft diameter range

25 to 120 mm

Typical shaft-bearing combinations

On a stepped shaft with bearings on a cylindrical seat


Felt strip




Oil lubrication (optional)


Grey cast iron


Four-bolt mounting

Compliance to standards

Not standardized