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SKF 20079 nitrile shaft seal transparent ring 2 by 3.15 by .375 in

SKF

SKF 20079 Shaft Seal CRW1 Nitrile 2 x 3.15 x .375 in

SKU CH-QRJG-821HA

Rotary shaft seal with nitrile lip rated for 3,000 RPM and 7.9 m/s surface speed

  • ColorTransparent
  • Width3/8"
  • Seals at up to 3,000 RPM with CRW1 design
  • Single nitrile lip resists oil, fuel and grease
  • Carbon-steel spring maintains constant lip pressure
  • Acrylic-coated case protects against corrosion
  • Compact 2 × 3.15 × .375 in profile fits tight housings

SKF 20079 Shaft Seal CRW1 Nitrile

The SKF 20079 is a rotary shaft seal designed for engine and industrial applications requiring reliable fluid retention. It suits mechanics and maintenance teams replacing worn seals on rotating shafts where nitrile rubber compatibility matches the operating fluids. The CRW1 design features a single lip with a carbon steel spring for consistent sealing pressure.

Upgrade from hardened or leaking seals

Replace this seal when the original shows cracking, hardening, or leakage at the shaft interface. The jump is worth it when the equipment runs up to 3,000 RPM and surface speeds reach 7.9 mps with compatible fluids such as mineral oils, gasoline, diesel, greases, animal and vegetable oils, or hot water. Maximum pressure rating is 10 psi.

Press-fit installation with standard tools

Installation is a straight press-fit into a 3.15 in bore using a seal driver or suitable sleeve to avoid lip damage. The 0.375 in width and 2 in shaft diameter must match the housing and shaft exactly. What usually goes wrong is cocking the seal during entry, damaging the nitrile lip, or fitting onto a shaft with grooves or corrosion that prevents sealing.

Highlights

  • Seals at up to 3,000 RPM with CRW1 design
  • Single nitrile lip resists oil, fuel and grease
  • Carbon-steel spring maintains constant lip pressure
  • Acrylic-coated case protects against corrosion
  • Compact 2 × 3.15 × .375 in profile fits tight housings

Specifications

BrandSKF
ColorTransparent
Width3/8"

Questions about this item

What housing bore diameter fits the 3.15 in outside diameter of this SKF 20079 seal?

The seal has a 3.15 in outside diameter and a 0.375 in overall width, so the housing bore must match 3.15 in and accommodate the full width for a proper press fit.

What tool and orientation prevent damage when pressing the CRW1 nitrile lip into place?

Use a flat driver that contacts only the steel case, not the nitrile lip, and press the seal squarely until the case sits flush with the housing shoulder.

At what shaft-speed condition should the 3 000 RPM nitrile lip be inspected for replacement?

Inspect the lip for hardening or leakage when shaft speed regularly approaches 3 000 RPM or after extended runs with diesel, gasoline or hot water above 10 psi.

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