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SKF 9997 nitrile shaft seal, CRW1 design, 1 inch inner diameter, 1.752 inch outer diameter, 0.25 inch width, carbon steel spring

SKF

SKF 9997 Shaft Seal CRW1 Nitrile 1 x 1-25/32 x 1/4

SKU CH-D73N-TVY49

Rotary shaft seal with 1 in inside diameter, 1.752 in outside diameter and 0.25 in width for oil and grease retention up to 3,840 RPM

  • Nitrile rubber lip resists oil and fuel
  • CRW1 contact seal blocks contaminants at 10 psi
  • Carbon-steel spring maintains lip pressure up to 3 840 RPM
  • 1 in bore fits standard shafts with 1.752 in housing
  • Acrylic-coated case protects against corrosion during installation

SKF 9997 Rotary Shaft Seal

The SKF 9997 is a CRW1 design rotary shaft seal built for a 1 inch shaft diameter and a 1.752 inch bore. Its nitrile rubber lip and carbon steel spring suit automotive engine and chassis maintenance where reliable fluid retention is required.

Suits standard inch-dimension housings

This seal fits equipment specifying a 1 in inside diameter, 1.752 in outside diameter and 0.25 in overall width. It is not for applications needing higher than 10 psi pressure capability, speeds above 3,840 RPM, or surface speeds exceeding 5.09 mps.

Handles common lubricants up to rated limits

The nitrile lip manages mineral oils, gasoline, diesel, greases, animal and vegetable oils, light heating oil and hot water within the 10 psi and 5.09 mps limits. Beyond those pressure or speed thresholds the seal will not maintain effective contact.

Highlights

  • Nitrile rubber lip resists oil and fuel
  • CRW1 contact seal blocks contaminants at 10 psi
  • Carbon-steel spring maintains lip pressure up to 3 840 RPM
  • 1 in bore fits standard shafts with 1.752 in housing
  • Acrylic-coated case protects against corrosion during installation

Specifications

BrandSKF

Questions about this item

What shaft diameter does the 1 in inside diameter of the SKF 9997 seal fit?

The seal is designed for a 1 in shaft, so the shaft must measure 1 in at the sealing surface for the nitrile lip to seat correctly.

Can the CRW1 nitrile lip handle the same fluids as an older leather seal I might be replacing?

The nitrile rubber lip is rated for mineral oils, gasoline, diesel, greases, animal and vegetable oils, light heating oil and hot water, covering most fluids a leather seal would see.

How do I confirm the seal is seated at the correct depth after pressing it into the 1.752 in bore?

Measure the installed face-to-face width; it should match the 0.25 in overall width, and the spring should sit squarely behind the single sealing lip.

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