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SKF 13676 rotary shaft seal transparent rubber ring 1.375 2.25 .313

SKF

SKF 13676 Rotary Shaft Seal CRWA1 NBR 1.375 2.25 .313

SKU CH-A68N-5XXQX

Rotary shaft seal with 1.375 in inside diameter, 2.25 in outside diameter and .313 in width for oil and grease retention up to 3,480 RPM

  • ColorTransparent
  • Width5/16"
  • Seals 1.375 in shafts with 2.25 in bore
  • NBR lip resists oil, fuel, grease and hot water
  • Twin-lip design with carbon-steel spring holds 10 psi max
  • Rated for 3,480 RPM and 6.38 m/s surface speed
  • Acrylic-coated case protects against corrosion during installation

Precision Engine Seal

The SKF 13676 is a CRWA1 rotary shaft seal built for engines and rotating equipment. It uses nitrile rubber lips and a carbon steel spring to seal oil, fuel, grease and hot water in automotive and industrial applications.

Fits 1.375 Inch Shafts

This seal presses into a 2.25 inch bore with a .313 inch width. The acrylic coated case helps installation and resists corrosion. It handles surface speeds up to 6.38 mps and rotational speeds to 3, 480 RPM at pressures up to 10 psi.

Replaces Worn Lip Seals

Upgrade when an original seal leaks or hardens from heat and chemical exposure. The dual lip design improves contamination exclusion compared to single lip units. It is not for buyers who need higher pressure ratings or larger shaft diameters.

Highlights

  • Seals 1.375 in shafts with 2.25 in bore
  • NBR lip resists oil, fuel, grease and hot water
  • Twin-lip design with carbon-steel spring holds 10 psi max
  • Rated for 3,480 RPM and 6.38 m/s surface speed
  • Acrylic-coated case protects against corrosion during installation

Specifications

BrandSKF
ColorTransparent
Width5/16"

Questions about this item

How long will the 10 psi pressure rating hold before the seal starts to leak under continuous operation?

The 10 psi maximum pressure is a design limit; running at or below this rating with proper installation and compatible fluids will maintain sealing performance for the intended service life.

Does the carbon-steel spring and nitrile lip generate noticeable heat or friction when running at 3 480 RPM all day?

At 3 480 RPM the surface speed reaches 6.38 m/s, which the NBR lip and carbon-steel spring are rated for; heat build-up stays within normal limits for oil or grease lubrication.

What shaft diameter and housing bore must I already have for the 1.375 in ID and 2.25 in OD to fit correctly?

You need a shaft of 1.375 in diameter and a housing bore of 2.25 in diameter; the seal installs with a press fit into the bore and rides on the shaft.

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