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Transparent rubber shaft seal, 3.625 by 4.999 by .375 inches, CRWA1 design

SKF

SKF 36361 Shaft Seal 3.625 x 4.999 x .375 in CRWA1 NBR

SKU CH-4YXF-59R5G

Rotary shaft seal measuring 3.625 by 4.999 by 0.375 inches with dual nitrile lips rated to 10 psi and 2160 RPM

  • ColorTransparent
  • Width3/8"
  • Seals 3.625 in shafts against 10 psi pressure
  • Nitrile rubber lips resist oil, fuel, grease and hot water
  • Dual-lip design with carbon-steel spring maintains contact at 2,160 RPM
  • Acrylic-coated case protects seal during installation and service
  • Width 0.375 in fits standard 3/8 in housing grooves

SKF 36361 Rotary Shaft Seal

This SKF 36361 rotary shaft seal suits maintenance on engines and rotating equipment where a 3.625 in shaft passes through a 4.999 in bore. The CRWA1 design uses nitrile rubber lips and a carbon steel spring to retain lubricants and exclude contaminants. Mechanics and plant engineers specify it for oil, grease, fuel and hot water duties.

Sustained sealing up to 2160 RPM

Under continuous rotation the seal handles surface speeds to 10.31 mps and pressures to 10 psi without losing contact. Two lips and the acrylic-coated case maintain a stable film at the rated speed, while the nitrile compound resists hardening in mineral oils, diesel, gasoline and light heating oil. The 0.375 in width gives enough lip area for long runs between replacements.

Check shaft finish and bore tolerance before

Verify the shaft diameter is 3.625 in with the recommended surface finish and that the housing bore matches 4.999 in. Confirm the fluid is compatible with nitrile rubber and that operating temperature stays within the material limits. The seal installs with the spring side toward the fluid; no special tools are required beyond standard press-in practice.

Highlights

  • Seals 3.625 in shafts against 10 psi pressure
  • Nitrile rubber lips resist oil, fuel, grease and hot water
  • Dual-lip design with carbon-steel spring maintains contact at 2,160 RPM
  • Acrylic-coated case protects seal during installation and service
  • Width 0.375 in fits standard 3/8 in housing grooves

Specifications

BrandSKF
ColorTransparent
Width3/8"

Questions about this item

Does the SKF 36361 shaft seal generate noticeable heat at 2,160 RPM?

At its rated 2,160 RPM the seal runs at a surface speed of 10.31 m/s, which keeps frictional heat low for continuous operation.

What shaft diameter and housing bore must I already have for the 3.625 in × 4.999 in seal to fit?

The seal requires a 3.625 in shaft and a 4.999 in bore, with a 0.375 in groove width, to seat correctly.

Will the NBR lip material handle the same mineral oils and diesel fuel my older engine uses?

Yes, the nitrile rubber lips are rated for mineral oils, diesel, gasoline, greases, animal and vegetable oils, and light heating oil.

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