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Transparent rubber shaft seal with black metal case and spring visible inside

SKF

SKF 17386 Shaft Seal 1.75 x 2.502 x .313 in CRW1 NBR

SKU CH-1AFX-GCRDY

Rotary shaft seal with 1.75 in inside diameter and 2.502 in outside diameter, NBR lip, carbon steel spring, rated to 10 psi and 3,180 RPM

  • ColorTransparent
  • Width5/16"
  • Reliable sealing up to 10 psi pressure
  • Nitrile rubber lip resists oils and fuels
  • Single-lip CRW1 design for rotary shafts
  • Carbon-steel spring maintains consistent contact force
  • Fits 1.75 in shaft with 2.502 in bore

Shaft Seal 1.75 x 2.502 in

The SKF 17386 rotary shaft seal fits a 1.75 inch shaft inside a 2.502 inch bore with a .313 inch width. It uses a CRW1 design code with a single nitrile rubber lip and carbon steel spring for standard industrial sealing tasks.

Capacity and pressure limits

The seal handles fluids such as mineral oils, gasoline, diesel, greases, hot water, and animal or vegetable oils at pressures up to 10 psi. Rotational speed is rated to 3,180 RPM with a maximum surface speed of 7.36 mps before lip wear accelerates.

Nitrile lip and acrylic coating

The lip material is nitrile rubber and the metal case carries an acrylic coating for corrosion resistance during installation and service. Buyers needing higher pressure ratings, dual-lip designs, or fluoroelastomer lips for aggressive chemicals should select a different specification.

Highlights

  • Reliable sealing up to 10 psi pressure
  • Nitrile rubber lip resists oils and fuels
  • Single-lip CRW1 design for rotary shafts
  • Carbon-steel spring maintains consistent contact force
  • Fits 1.75 in shaft with 2.502 in bore

Specifications

BrandSKF
ColorTransparent
Width5/16"

Questions about this item

Will the 1.75 in inside diameter match my existing 1.75 in shaft without machining?

Yes — the seal is manufactured to a 1.75 in inside diameter and 2.502 in outside diameter for a direct press fit on standard shafts of that size.

How can I confirm the CRW1 lip is sealing correctly after installation?

Run the shaft up to its normal speed and check for oil weep at the lip; the single nitrile lip with carbon-steel spring is rated to 10 psi and 3 180 RPM, so a dry seal face under those conditions shows it is working.

Does the box include the acrylic-coated case or must I supply a housing separately?

The seal ships as a complete CRW1 assembly — nitrile lip, carbon-steel spring and acrylic-coated metal case are all in one piece; you only need a clean 2.502 in bore to press it into.

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