We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Transparent rotary shaft seal with carbon steel spring, 1.375 in inner diameter, 2.441 in outer diameter

SKF

SKF 13812 Shaft Seal 1.375 x 2.441 x .313 in CRWA1 NBR

SKU CH-5TMG-60M27

Rotary shaft seal with 1.375 in inner diameter, 2.441 in outer diameter, .313 in width, NBR lip material and carbon-steel spring for up to 3,480 RPM

  • ColorTransparent
  • Width5/16"
  • Reliable sealing with NBR lips resisting oils and fuels
  • Low-pressure performance rated to 10 psi for general applications
  • High-speed capability up to 3,480 RPM in rotating equipment
  • Dual-lip design with carbon-steel spring maintains consistent contact
  • Acrylic-coated case protects against corrosion in harsh environments

SKF 13812 Rotary Shaft Seal

The SKF 13812 is a CRWA1-design rotary shaft seal built for 1.375 in inside diameter and 2.441 in outside diameter. Its nitrile rubber lip material resists mineral oils, gasoline, diesel, greases, animal and vegetable oils, hot water and light heating oil. The dual-lip construction with a carbon steel spring suits maintenance technicians and engine rebuilders who need reliable fluid retention.

Replaces worn original seals

This seal installs directly in place of a damaged or leaking unit with matching dimensions. The upgrade is worthwhile when the original lip has hardened, the spring has lost tension or the case coating has deteriorated. It restores sealing at up to 10 psi pressure and 3,480 RPM without requiring housing modifications.

Limited to 6.38 mps surface speed

The CRWA1 standard caps usable surface speed at 6.38 mps, so high-speed shafts beyond 3,480 RPM at this diameter exceed the design envelope. The acrylic case coating and nitrile lips are not rated for aggressive chemicals or extreme temperatures outside the listed fluid types. Buyers needing higher pressure, speed or chemical resistance must select a different seal profile.

Highlights

  • Reliable sealing with NBR lips resisting oils and fuels
  • Low-pressure performance rated to 10 psi for general applications
  • High-speed capability up to 3,480 RPM in rotating equipment
  • Dual-lip design with carbon-steel spring maintains consistent contact
  • Acrylic-coated case protects against corrosion in harsh environments

Specifications

BrandSKF
ColorTransparent
Width5/16"

Questions about this item

What bore diameter does the SKF 13812 shaft seal require for installation?

The SKF 13812 shaft seal requires a bore diameter of 2.441 inches for proper installation into the housing.

How do you install the SKF 13812 seal correctly and what common mistake should be avoided?

Press the seal evenly into the 2.441 inch bore using a suitable driver tool; avoid hammering directly on the seal case which can damage the acrylic coating and distort the nitrile lips.

When should the SKF 13812 seal be replaced based on its operating limits?

Replace the seal if shaft speed exceeds 3,480 RPM, surface speed exceeds 6.38 m/s, pressure exceeds 10 psi, or if nitrile lips show wear, hardening, or leakage with compatible fluids like mineral oils or gasoline.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.