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SKF 14938 shaft seal 1.5 x 2.25 x .313 in transparent nitrile rubber

SKF

SKF 14938 Shaft Seal 1.5 x 2.25 x .313 in CRW1 NBR

SKU CH-GA5N-FB6E1

Rotary shaft seal with 1.5 in ID, 2.25 in OD, .313 in width, nitrile rubber lip, carbon steel spring, rated to 10 psi and 3,360 RPM

  • ColorTransparent
  • Protects bearings with 1.5 in bore seal
  • Resists oil and fuel using NBR lip material
  • Handles 360 RPM shaft speeds reliably
  • Limits pressure to 10 psi for low-load use
  • Fits 2.25 in housing with .313 in width

Shaft Seal 14938 Dimensions

The SKF 14938 is a rotary shaft seal built to CRW1 design code with an inside diameter of 1.5 in, an outside diameter of 2.25 in and an overall width of .313 in. It uses a single nitrile rubber lip retained by a carbon-steel spring and an acrylic-coated case. The seal suits animal and vegetable oils, diesel, gasoline, greases, hot water, light heating oil and mineral oils.

Installation Checks

Before ordering, verify that the shaft diameter matches the 1.5 in bore and the housing bore matches the 2.25 in outside diameter. Confirm the groove width can accommodate the .313 in seal width and that the running surface finish is suitable for a contact-type nitrile lip. Ensure the application pressure does not exceed 10 psi and the shaft speed stays within 3, 360 RPM.

Sustained Load Behaviour

Under continuous operation the nitrile lip maintains sealing up to the rated 6.74 mps surface speed and 10 psi pressure limit. The carbon-steel spring provides consistent radial force over time while the acrylic case coating resists corrosion from the approved fluid types. Performance remains stable within the stated rotational speed envelope without the degradation seen in short-term test bursts.

Highlights

  • Protects bearings with 1.5 in bore seal
  • Resists oil and fuel using NBR lip material
  • Handles 360 RPM shaft speeds reliably
  • Limits pressure to 10 psi for low-load use
  • Fits 2.25 in housing with .313 in width

Specifications

BrandSKF
ColorTransparent

Questions about this item

What does the SKF 14938 shaft seal include and is any installation tool sold separately?

The box contains the single CRW1 rotary shaft seal with nitrile rubber lip, carbon steel spring and acrylic-coated case. No installation tool is included; a suitable driver or press must be sourced separately.

How do I choose between the listed dimensions for this seal?

The seal is a single size: 1.5 in inside diameter, 2.25 in outside diameter and .313 in overall width. Match these three figures to the shaft and housing bore before ordering.

What does the 3,360 RPM rating mean once the seal is fitted?

It is the maximum rotational speed the lip can sustain at 6.74 m/s surface speed under 10 psi pressure. Exceeding this limit in service will accelerate lip wear and leakage.

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