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Transparent nitrile shaft seal with black spring visible inside circular metal case

SKF

SKF 12458 Shaft Seal 1.25 x 2 x .25 in CRWA1 Nitrile

SKU CH-KKXX-J1YRX

Rotary shaft seal with 1.25 in inside diameter, 2 in outside diameter and 0.25 in width, nitrile lip rated to 10 psi and 100 Degrees C

  • ColorTransparent
  • Seals at up to 3,600 RPM with nitrile lips
  • Withstands 100 °C continuous temperature limit
  • Handles 10 psi maximum pressure rating
  • Fits 1.25 in shaft and 2 in bore
  • Twin lips and carbon-steel spring retain lubrication

SKF 12458 Rotary Shaft Seal

This SKF 12458 rotary shaft seal is built for machinery that requires a reliable barrier on a 1.25 in shaft. It suits maintenance technicians and engineers working with rotating equipment in automotive or industrial settings. The nitrile rubber lips handle animal and vegetable oils, diesel, gasoline, greases, hot water, light heating oil and mineral oils.

Critical size match 1.25 in ID x 2 in OD x .25

The single specification that decides fit is the exact dimensional set: 1.25 in inside diameter, 2 in outside diameter and .25 in overall width. The CRWA1 design code confirms a double-lip contact seal with a carbon steel spring. Maximum rotational speed is rated at 3 600 RPM with a surface speed limit of 6 mps.

Press-fit into a 2 in bore for 10 psi sealing

The seal presses into a 2 in housing bore and grips a 1.25 in shaft, delivering a 10 psi pressure rating at up to 100 Degrees C. The acrylic-coated case eases installation and resists corrosion. No additional sealing compounds are required, freeing up assembly time for other tasks.

Highlights

  • Seals at up to 3,600 RPM with nitrile lips
  • Withstands 100 °C continuous temperature limit
  • Handles 10 psi maximum pressure rating
  • Fits 1.25 in shaft and 2 in bore
  • Twin lips and carbon-steel spring retain lubrication

Specifications

BrandSKF
ColorTransparent

Questions about this item

What does the 10 psi maximum pressure rating mean for my engine rebuild?

The seal is designed to hold up to 10 psi differential pressure across the lip, typical for crankcase or gearbox splash environments rather than pressurised hydraulic circuits.

How does the CRWA1 design code affect interchangeability with other seals?

CRWA1 identifies a single-case, double-lip rotary shaft seal with a carbon-steel garter spring and acrylic-coated metal case to the SKF standard.

Will the 1.25 in inside diameter and 0.25 in width fit my shaft and housing bore?

The seal fits a 1.25 in shaft and a 2 in housing bore with an installed width of 0.25 in; verify shaft tolerance and bore finish before installation.

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