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SKF 9838 nitrile rotary shaft seal, 1 x 1.437 x .25 in, black rubber with metal case

SKF

SKF 9838 Shaft Seal CRWA1 Nitrile 1 x 1.437 x .25 in

SKU CH-JSHW-VA1ZB

Rotary shaft seal with 1 in bore, 1.437 in OD, .25 in width, nitrile lips and carbon-steel spring

  • Seals rotating shafts up to 3,840 RPM with nitrile lips
  • Contains diesel, gasoline, oil and grease with 10 psi pressure rating
  • Dual-lip CRWA1 design blocks contaminants at 5.09 m/s surface speed
  • Carbon-steel spring maintains lip force across 1 in to 1.437 in diameters
  • Acrylic-coated case resists corrosion in animal, vegetable and mineral fluids

Rotary Shaft Seal CRWA1

The SKF 9838 is a nitrile rubber rotary shaft seal built to the CRWA1 design code. It suits automotive and RV drivetrain positions where a reliable lip seal is required for fluids such as engine oil, diesel, gasoline, grease or hot water.

Verify dimensions and fluid compatibility

Confirm the shaft diameter is exactly 1 in and the housing bore is 1.437 in before ordering. The seal runs up to 3,840 rpm with a maximum surface speed of 5.09 m/s and handles pressures up to 10 psi, so ensure the application stays within those limits.

For maintenance on compatible shafts

Mechanics servicing equipment with a 1 in shaft and 1.437 in bore will find this seal a direct fit. It is not intended for higher-pressure systems, larger shaft diameters or fluids outside the listed compatibility range.

Highlights

  • Seals rotating shafts up to 3,840 RPM with nitrile lips
  • Contains diesel, gasoline, oil and grease with 10 psi pressure rating
  • Dual-lip CRWA1 design blocks contaminants at 5.09 m/s surface speed
  • Carbon-steel spring maintains lip force across 1 in to 1.437 in diameters
  • Acrylic-coated case resists corrosion in animal, vegetable and mineral fluids

Specifications

BrandSKF

Questions about this item

What comes with the SKF 9838 shaft seal and do I need to buy anything else for installation?

The box contains the CRWA1 nitrile seal with 1 in inside diameter, 1.437 in outside diameter and 0.25 in width. No additional parts are included; you may need a suitable installation tool or driver depending on the housing.

Which version of this seal should I choose for my application?

The SKF 9838 is a single specification: CRWA1 design, nitrile rubber lip, carbon-steel spring, acrylic-coated case, rated for 10 psi and 3,840 rpm. Select it when those exact dimensions and fluid compatibilities match your shaft and housing.

What does the 3,840 rpm rating mean once the seal is fitted on the shaft?

It is the maximum rotational speed the lip can sustain while maintaining a reliable seal against the listed fluids. Exceeding it can cause overheating, lip wear and leakage, so verify your shaft speed stays below this limit.

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