4931 (CR4931CRW1R)

Radial shaft seal with metal case and SKF Wave lip, for oil or grease

A radial shaft seal, also known as a lip seal, rotary shaft seal, or oil seal, is a type of mechanical seal used to prevent the leakage of lubricants or other fluids in rotating machinery.

CRW1 seals feature a metal case, an SKF WAVE lip constructed from elastomeric material designed for enhanced pumping efficiency to minimize heat generation, and a garter spring to optimize the sealing performance against the shaft.

  • For oil or grease
  • With garter spring
  • WAVE lip creates higher pumping rate
  • WAVE lip has less friction between shaft and lip
  • WAVE lip has a lower temperature at the contact point
Type of outside diameter Metal-cased with sealant coating on the outside diameter
Lip material Nitrile rubber (NBR)
Seal design CRW1


Inch mm
Shaft, d1 0.500 12.70
Bore, D 0.875 22.23
Width, b 0.250 6.35

Application and operating conditions

Operating temperature (min.) -40 °C
Operating temperature (max.) 100 °C
Circumferential speed (max.) 2.28 m/s
Rotational speed (max.) 3420 r/min
Pressure differential 0.07 N/mm²
Fast repair of worn shaft 99050 (click to view)


SKU: 4931-SKF Categories: , ,

Additional information

Weight 0.008 kg


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