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Transparent rotary shaft seal with metal case and dual nitrile rubber lips, spring visible inside, 1.438 in inner diameter

SKF

SKF 14247 Rotary Shaft Seal CRWA1 NBR

SKU CH-BJJQ-VN26G

Rotary shaft seal with 1.438 in inner diameter, 2.25 in outer diameter and 0.313 in width, rated for 3,420 RPM and 10 psi maximum pressure

  • ColorTransparent
  • Reliable sealing up to 10 psi with nitrile rubber lips
  • Handles 3,420 RPM rotational speed for demanding applications
  • Compatible with diesel, gasoline, oils and greases
  • CRWA1 design with carbon steel spring maintains contact
  • 438 in ID fits standard shaft dimensions

Shaft seal for 1.438 in shafts

The SKF 14247 rotary shaft seal fits a 1.438 in inside diameter and a 2.25 in outside diameter with a .313 in overall width. It uses a CRWA1 design code and nitrile rubber lips on a carbon steel spring. The seal suits animal and vegetable oils, diesel, gasoline, greases, hot water, light heating oil and mineral oils. It is rated for 10 psi maximum pressure and 3,420 RPM maximum rotational speed.

Dual-lip design with acrylic coating

Two sealing lips and an acrylic case coating help retain lubricant and exclude contaminants in the listed fluid types. The carbon steel spring maintains lip contact through the 6.56 mps maximum surface speed. These features address leakage and wear in rotating equipment without requiring additional components or software.

Press-fit installation into 2.25 in bore

The seal installs by pressing the acrylic-coated case into a 2.25 in housing bore until flush. A uniform press prevents case distortion that can cause leaks. Common issues include nicked lips during insertion and misalignment that accelerates wear at the 3,420 RPM limit.

Highlights

  • Reliable sealing up to 10 psi with nitrile rubber lips
  • Handles 3,420 RPM rotational speed for demanding applications
  • Compatible with diesel, gasoline, oils and greases
  • CRWA1 design with carbon steel spring maintains contact
  • 438 in ID fits standard shaft dimensions

Specifications

BrandSKF
ColorTransparent

Questions about this item

When will the NBR lip material on this CRWA1 seal need replacement?

The nitrile rubber lips handle animal and vegetable oils, diesel, gasoline, greases, hot water, light heating oil and mineral oils; plan replacement when leakage appears or during scheduled shaft maintenance.

What rotational speed limit appears first during continuous operation?

Maximum rotational speed is 3,420 RPM and maximum surface speed is 6.56 mps; exceeding either limit will cause premature lip wear.

How much heat and power loss should I expect from the seal running all day?

The 10 psi pressure rating and 0.313 in width keep frictional heat low; the carbon-steel spring maintains lip contact without adding measurable power draw.

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