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Black rubber shaft seal with metal spring visible inside lip, 1.938 in inner diameter 2.875 in outer diameter 0.313 in wide

SKF

SKF 19301 Shaft Seal CRWA1 NBR 1.938x2.875x.313 in

SKU CH-C306-S8ARZ

Rotary shaft seal with 1.938 in inside diameter, 2.875 in outside diameter and 0.313 in width, rated to 10 psi and 3,000 RPM

  • CRWA1 design ensures reliable rotary sealing
  • Nitrile rubber lips resist oils, fuels and greases
  • 938 in bore fits 1-15/16 inch shafts precisely
  • Dual-lip construction with carbon-steel spring maintains contact
  • Rated for 3,000 RPM and 7.77 m/s surface speed

Engine Shaft Seal for Rotating Assemblies

The SKF 19301 is a rotary shaft seal built for engine assemblies that require a CRWA1 design. It fits bores with a 2.875 in outside diameter and shafts measuring 1.938 in inside diameter. Mechanics and rebuilders use it to retain lubricants and exclude contaminants in rotating equipment.

Critical Dimensions and Pressure Limit

The seal has an overall width of .313 in and a maximum pressure rating of 10 psi. Its non-contact, dual-lip design with a carbon steel spring is engineered for surface speeds up to 7.77 mps and rotational speeds up to 3,000 RPM. Verify these exact figures against your housing and shaft specifications before installation.

Nitrile Rubber Lip and Acrylic-Coated Case

The lip material is nitrile rubber compatible with mineral oils, gasoline, diesel, greases, animal and vegetable oils, light heating oil and hot water. The acrylic case coating aids installation and corrosion resistance. Buyers needing seals for aggressive chemicals, higher pressures or non-standard fluids should confirm compatibility separately.

Highlights

  • CRWA1 design ensures reliable rotary sealing
  • Nitrile rubber lips resist oils, fuels and greases
  • 938 in bore fits 1-15/16 inch shafts precisely
  • Dual-lip construction with carbon-steel spring maintains contact
  • Rated for 3,000 RPM and 7.77 m/s surface speed

Specifications

No published specifications for this item yet.

Questions about this item

What does the 1.938 in inside diameter mean when the seal is installed?

The 1.938 in inside diameter fits a shaft of that exact size, so the sealing lips contact the shaft surface directly.

How does the 10 psi maximum pressure limit actual use?

The seal is rated for 10 psi maximum pressure, making it suitable only for low-pressure or splash-lubricated rotary applications.

What housing bore and shaft clearance does the 2.875 in outside diameter and 0.313 in width require?

The 2.875 in outside diameter presses into a matching bore, while the 0.313 in width determines the axial space the seal occupies in the housing.

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