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SKF 18545 shaft seal, transparent nitrile rubber ring with metal spring, 1.875 x 2.471 x .313 in

SKF

SKF 18545 Shaft Seal 1.875 x 2.471 x .313 in

SKU CH-3E5X-QB1NZ

Shaft seal with 1.875 in inside diameter, 2.471 in outside diameter and .313 in width handles oils, fuels, greases and hot water up to 3,060 RPM

  • ColorTransparent
  • Width5/16"
  • Reliable sealing up to 10 psi pressure
  • Dual-lip design blocks leaks at 3,060 RPM max speed
  • Nitrile rubber resists oil, fuel, grease and water
  • Carbon-steel spring maintains constant lip contact
  • Compact 1.875 in ID fits standard shafts

SKF 18545 Shaft Seal Specifications

The SKF 18545 is a rotary shaft seal designed for industrial and automotive sealing tasks. It fits a shaft diameter of 1.875 in and a bore of 2.471 in with an overall width of .313 in. Mechanics and maintenance engineers use it to retain lubricants and exclude contaminants in rotating equipment.

Capacity and Operating Limits

The seal handles a maximum pressure of 10 psi and a maximum rotational speed of 3,060 RPM with a surface speed up to 7.64 mps. Its nitrile rubber lips are compatible with mineral oils, gasoline, diesel, greases, animal and vegetable oils, and hot water. It is not suited for high-pressure hydraulic systems or shaft speeds beyond the rated limit.

CRWA1 Design and Dual-Lip Benefit

The CRWA1 design incorporates two sealing lips and a carbon steel garter spring to maintain consistent radial load. The acrylic-coated case eases installation and resists bore corrosion. This configuration improves sealing reliability compared to single-lip alternatives in the listed fluid types.

Highlights

  • Reliable sealing up to 10 psi pressure
  • Dual-lip design blocks leaks at 3,060 RPM max speed
  • Nitrile rubber resists oil, fuel, grease and water
  • Carbon-steel spring maintains constant lip contact
  • Compact 1.875 in ID fits standard shafts

Specifications

BrandSKF
ColorTransparent
Width5/16"

Questions about this item

Will the 1.875 in inside diameter and 2.471 in outside diameter match the worn shaft and housing on my older engine?

The seal is built to 1.875 in inside diameter and 2.471 in outside diameter; compare those dimensions directly with the shaft and bore on the existing engine to confirm fit.

How can I verify the CRWA1 design with its two nitrile lips and carbon-steel spring is sealing correctly after installation?

After fitting, run the engine up to 3,060 RPM and check for leaks; the dual-lip NBR seal rated for 10 psi and 7.64 mps surface speed should show no weep at the shaft.

Does the box include the acrylic-coated case and spring, or must I supply any hardware separately?

The CRWA1 assembly ships complete with the acrylic-coated case, carbon-steel spring and dual NBR lips — no extra components are required for installation.

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