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SKF 21164 nitrile shaft seal, translucent rubber ring with metal spring visible

SKF

SKF 21164 Shaft Seal 2.125x3x.375 in CRWA1 Nitrile

SKU CH-FBWY-5ZX1R

Rotary shaft seal with 2.125 in inside diameter, 3 in outside diameter and 0.375 in width for oils, greases and fuels up to 10 psi and 2,880 RPM

  • ColorTransparent
  • Width3/8"
  • SKF quality shaft seal built for reliable engine sealing
  • CRWA1 design with dual lips handles 10 psi pressure limit
  • Nitrile rubber lip resists oil, fuel, grease and hot water
  • 125 in ID by 3 in OD fits precise shaft dimensions
  • Rated for 880 RPM and 8.15 m/s surface speed

SKF 21164 Shaft Seal

The SKF 21164 is a rotary shaft seal built for engines and rotating equipment that need reliable fluid retention. It suits mechanics and engineers working with inch-dimension shafts where a nitrile lip material is specified.

Capacity and headroom

The seal handles shaft speeds up to 2,880 RPM and surface speeds of 8.15 mps while resisting pressures to 10 psi. Its dual-lip design in nitrile rubber covers animal and vegetable oils, diesel, gasoline, greases, hot water, light heating oil and mineral oils.

Build fit

The CRWA1 design measures 2.125 in inside diameter, 3 in outside diameter and .375 in overall width with an acrylic-coated case and carbon-steel spring. It presses directly into a matching bore, eliminating the need for a separate retaining flange and freeing up axial space in the housing.

Highlights

  • SKF quality shaft seal built for reliable engine sealing
  • CRWA1 design with dual lips handles 10 psi pressure limit
  • Nitrile rubber lip resists oil, fuel, grease and hot water
  • 125 in ID by 3 in OD fits precise shaft dimensions
  • Rated for 880 RPM and 8.15 m/s surface speed

Specifications

BrandSKF
ColorTransparent
Width3/8"

Questions about this item

Will the 2.125 in inside diameter match my existing shaft?

The seal's inside diameter is 2.125 in and outside diameter is 3 in, so it fits shafts of that exact size.

How can I confirm the CRWA1 seal is seated correctly after installation?

The nitrile lips should sit evenly against the shaft with the carbon-steel spring holding uniform contact at up to 10 psi.

Does the 21164 come with any installation hardware or lubricant?

The box contains only the CRWA1 nitrile shaft seal; no tools, lubricant or additional hardware are included.

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