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SKF 18733 shaft seal, translucent rubber ring with metal case and spring, 1.875 in ID 2.875 in OD .313 in W

SKF

SKF 18733 Shaft Seal 1.875 in ID 2.875 in OD .313 in W CRW1 NBR

SKU CH-2AVB-AP770

Rotary shaft seal with 1.875 in ID, 2.875 in OD, .313 in width, nitrile rubber lip, carbon steel spring, 10 psi max pressure, 3,060 RPM limit, 7.64 mps surface speed

  • ColorTransparent
  • Reliable sealing up to 10 psi with nitrile rubber lip
  • Fits 1.875 in shaft and 2.875 in bore for precise installation
  • Single-lip CRW1 design handles 3,060 RPM rotational speeds
  • Compatible with oils, fuels, greases and hot water applications
  • Carbon steel spring maintains consistent lip pressure over time

Shaft Seal for Rotary Applications

The SKF 18733 is a CRW1 design rotary shaft seal built for equipment requiring a 1.875 in inside diameter and 2.875 in outside diameter. Its nitrile rubber lip handles animal and vegetable oils, diesel, gasoline, greases, hot water, light heating oil and mineral oils. The single lip with carbon steel spring suits general industrial and automotive maintenance tasks.

Thermals, Noise and Power Draw

As a passive sealing component, the seal generates no operational noise and draws no electrical power. Frictional heat at the lip stays within limits for the rated maximum surface speed of 7.64 mps and rotational speed of 3,060 RPM. The acrylic-coated case and nitrile material maintain integrity up to the maximum pressure of 10 psi during normal service.

Bundled Accessories and Software

The product is supplied as a single sealing unit with no additional hardware, lubricants or software included. Installation relies on standard press-fit techniques appropriate for the 0.313 in width and CRW1 profile. No specialised tools or digital resources are provided, so technicians must follow general sealing best practices for the specified fluid types.

Highlights

  • Reliable sealing up to 10 psi with nitrile rubber lip
  • Fits 1.875 in shaft and 2.875 in bore for precise installation
  • Single-lip CRW1 design handles 3,060 RPM rotational speeds
  • Compatible with oils, fuels, greases and hot water applications
  • Carbon steel spring maintains consistent lip pressure over time

Specifications

BrandSKF
ColorTransparent

Questions about this item

How do I press the SKF 18733 CRW1 seal squarely into a 2.875 in bore without cocking the acrylic-coated case?

Use a flat driver plate that contacts the outer case evenly, tap it in until the 0.313 in wide seal sits flush with the housing face, and avoid hammering the nitrile lip directly.

When does the nitrile lip on this 1.875 in ID seal need replacement?

Replace the seal when the single lip shows hardening, cracking, or leakage past the carbon-steel spring, typically after extended exposure to gasoline, diesel, or hot water above the 10 psi pressure limit.

What sustained speed limit appears first on this CRW1 shaft seal?

The 3,060 RPM rotational ceiling or the 7.64 m/s surface-speed limit will be reached before the 10 psi pressure rating becomes the governing factor.

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