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Transparent nitrile rubber rotary shaft seal with metal spring, 1.375 in inner diameter, 2.562 in outer diameter, 0.375 in wide

SKF

SKF 13876 Rotary Shaft Seal 1.375 x 2.562 x .375 in

SKU CH-EFP2-533N7

Seals rotating shafts at 3,480 RPM with twin nitrile lips and carbon-steel spring

  • ColorTransparent
  • Width3/8"
  • Seals shafts up to 3,480 RPM with CRWA1 design
  • Dual NBR lips handle 10 psi across oils, fuels and water
  • 375 in ID fits common shaft sizes
  • Carbon-steel spring maintains lip contact through temperature cycles
  • Acrylic-coated case resists corrosion during installation and service

Product Identity

The SKF 13876 is a new rotary shaft seal designed for engine repair and maintenance tasks. It fits shafts with a 1.375 in inside diameter and a 2.562 in outside diameter. Mechanics and DIY enthusiasts use it to retain lubricants and exclude contaminants in rotating assemblies.

Operating Limits

The seal handles a maximum pressure of 10 psi and a top rotational speed of 3,480 RPM. Its nitrile rubber lips suit animal and vegetable oils, diesel, gasoline, greases, hot water, light heating oil and mineral oils. Surface speed must not exceed 6.38 mps.

Installation Notes

Press the seal squarely into the housing bore to avoid lip damage or case distortion. The carbon steel spring and acrylic-coated case aid retention, but misalignment during fitting often causes immediate leaks. Verify shaft surface finish and chamfer before assembly.

Highlights

  • Seals shafts up to 3,480 RPM with CRWA1 design
  • Dual NBR lips handle 10 psi across oils, fuels and water
  • 375 in ID fits common shaft sizes
  • Carbon-steel spring maintains lip contact through temperature cycles
  • Acrylic-coated case resists corrosion during installation and service

Specifications

BrandSKF
ColorTransparent
Width3/8"

Questions about this item

Which shaft diameter matches the 1.375 in inside diameter of this SKF 13876 seal?

Choose this SKF 13876 seal when your shaft measures exactly 1.375 in (1-3/8 in) in diameter. The inside diameter is made to fit that shaft size with a 2.562 in outside diameter and .375 in width.

What does the 10 psi maximum pressure rating mean once the seal is installed?

The 10 psi rating is the highest fluid pressure the double-lip NBR seal can hold reliably in service. Pressures above that can push past the lips and cause leakage on oil, grease, fuel or water systems.

How does the 3,480 RPM limit affect the seal in a running engine?

At 3,480 RPM the contact lips reach the rated 6.38 m/s surface speed. Running the shaft faster raises lip temperature and wear, so the seal is suited for moderate-speed shafts such as pump, gearbox or accessory drives.

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