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Transparent nitrile rubber shaft seal with metal spring, 1.125 in ID 1.752 in OD 0.25 in wide

SKF

SKF 11138 Shaft Seal 1.125 in ID 1.752 in OD CRW1 Nitrile

SKU CH-JXPB-X99Z9

Rotary shaft seal with 1.125 in ID, 1.752 in OD and 0.25 in width handles oil, fuel and grease at up to 3,720 RPM

  • ColorTransparent
  • Handles diverse fluids with nitrile rubber lip
  • Seals at 1.125 in shaft diameter
  • Withstands 10 psi system pressure
  • Operates up to 720 RPM shaft speed
  • Carbon steel spring maintains lip tension

Rotary Shaft Seal CRW1

The SKF 11138 is a new rotary shaft seal designed for equipment with a 1.125 in shaft diameter. It fits housings bored to 1.752 in and uses a single nitrile rubber lip to retain lubricants and exclude contaminants.

Build integration 0.25 in width

The seal installs into a bore that accepts its 1.752 in outside diameter and 0.25 in overall width. Its acrylic-coated case resists corrosion while the carbon-steel spring maintains lip contact. It frees the assembly from leakage of mineral oils, diesel, gasoline, greases, animal and vegetable oils, and hot water.

Sustained operation 3 720 RPM

Under continuous rotation the seal is rated for 3 720 RPM with a maximum surface speed of 5.57 mps. Pressure capability is limited to 10 psi so it suits low-pressure splash or gravity-fed circuits rather than pressurised systems. The single lip and nitrile material maintain sealing through extended duty cycles within these limits.

Highlights

  • Handles diverse fluids with nitrile rubber lip
  • Seals at 1.125 in shaft diameter
  • Withstands 10 psi system pressure
  • Operates up to 720 RPM shaft speed
  • Carbon steel spring maintains lip tension

Specifications

BrandSKF
ColorTransparent

Questions about this item

At what rotational speed does the 11138 seal reach its 3,720 RPM limit?

The seal is rated for a maximum of 3,720 RPM and a surface speed of 5.57 mps.

How hot does the nitrile lip get when the seal runs continuously at 3,720 RPM?

Nitrile rubber handles typical engine temperatures; the seal is rated for fluids including hot water and mineral oils up to its 10 psi pressure limit.

What shaft diameter and housing bore does the 11138 seal require for installation?

The seal fits a 1.125 in shaft inside a 1.752 in bore with a 0.25 in overall width.

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