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SKF 29866 rotary shaft seal, transparent nitrile rubber with carbon steel spring, 3 in inner diameter, 3.751 in outer diameter

SKF

SKF 29866 Rotary Shaft Seal 3 x 3.751 x .375 in CRWA1 Nitrile

SKU CH-REV5-B101K

Rotary shaft seal with 3 in inside diameter, 3.751 in outside diameter and .375 in width, nitrile lips rated for 10 psi and 2,400 RPM

  • ColorTransparent
  • Width3/8"
  • Seals against 10 psi pressure with nitrile rubber lips
  • Handles rotational speeds up to 2,400 RPM
  • Spring-loaded carbon steel lip maintains contact at 9.55 m/s surface speed
  • Resists animal oils, diesel, gasoline, greases and mineral oils
  • Acrylic-coated case protects seal in harsh fluid environments

SKF 29866 Rotary Shaft Seal

This SKF 29866 rotary shaft seal is designed for industrial and automotive maintenance where a 3 inch inside diameter is required. It suits technicians replacing worn seals on rotating equipment handling common lubricants and fuels.

3.751 in outside diameter and 2,400 RPM limit

The seal fits a 3.751 inch bore and handles surface speeds up to 9.55 mps at a maximum rotational speed of 2,400 RPM. It operates within a 10 psi pressure limit and is not suited for high-pressure hydraulic systems or speeds beyond the rated maximum.

Dual nitrile lips with carbon steel spring

Two nitrile rubber lips and a carbon steel spring maintain consistent contact against the shaft. The acrylic case coating eases installation into the housing, while the nitrile material resists mineral oils, greases, gasoline, diesel, animal and vegetable oils, and hot water.

Highlights

  • Seals against 10 psi pressure with nitrile rubber lips
  • Handles rotational speeds up to 2,400 RPM
  • Spring-loaded carbon steel lip maintains contact at 9.55 m/s surface speed
  • Resists animal oils, diesel, gasoline, greases and mineral oils
  • Acrylic-coated case protects seal in harsh fluid environments

Specifications

BrandSKF
ColorTransparent
Width3/8"

Questions about this item

Will this 3 in inside-diameter seal fit the existing 3 in shaft on my older engine without machining?

The seal is manufactured to a 3 in inside diameter and 3.751 in outside diameter, so it matches a standard 3 in shaft and housing bore without modification.

How can I verify the CRWA1 nitrile seal is seated and sealing correctly after installation?

Check that the 0.375 in wide seal sits flush in the bore, the dual lips contact the shaft evenly, and no fluid leaks appear at speeds up to 2,400 RPM.

Does the box include the carbon-steel garter spring and acrylic-coated case, or must I supply them separately?

The spring and coated case are integral to the CRWA1 design; the seal ships as a complete assembly ready to install.

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