Page 557 - SKF-bearing-housings

Two-bearing housings

PD series

SKF two-bearing housings were originally
Bearing types developed for fan shafts with an overhung
• Single row deep groove ball bearings impeller, but are also suitable for other appli-
• Single row angular contact ball cations with similar shaft arrangements.
bearings Compared to the conventional shaft arrange-
• Single row cylindrical roller bearings
ment where two self-aligning bearings are
mounted in separate plummer (pillow) block
Bearing dimension series housings, two-bearing housings provide sev-
• 62, 63 eral advantages including improved running
• 72, 73 accuracy and quieter operation.
• NU 22, NU 3, NJ 22, NJ 23, NJ 2, NJ 3
PD two-bearing housings can also be sup-
plied as ready-to-mount units.
Shaft diameter range
• 25 to 120 mm
Shaft-bearing combination
• On a stepped shaft with bearings on a
cylindrical seat
Seals
• Felt strip
• V-ring
Lubrication 12
• Grease
• Oil lubrication (optional)
Materials
• Grey cast iron

Mounting
• Four-bolt mounting
Compliance to standards
• Not standardized

553