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Transparent rubber shaft seal with black spring, 1.438 in ID, 2.437 in OD, .313 in wide

SKF

SKF 14363 shaft seal 1.438 x 2.437 x .313 in CRW1 NBR

SKU CH-ZDTW-9GR31

Rotary shaft seal with 1.438 in inner and 2.437 in outer diameters, nitrile lip and carbon-steel spring rated to 10 psi and 3,420 RPM

  • ColorTransparent
  • Width5/16"
  • CRW1 design ensures reliable rotary shaft sealing
  • Nitrile rubber lip resists oil, fuel, grease and hot water
  • 438 in bore fits precise shaft dimensions
  • Spring-loaded carbon steel lip maintains contact up to 3,420 RPM
  • Acrylic-coated case protects against corrosion in harsh environments

Precision Engine Sealing Component

The SKF 14363 rotary shaft seal fits a 1.438 in shaft and seats in a 2.437 in bore with a .313 in width. Its single nitrile rubber lip and carbon steel spring suit engines or gearboxes handling mineral oils, gasoline, diesel, greases or hot water. Mechanics and rebuilders use it to stop leaks at rotating shafts.

CRW1 Design and Material Choices

The CRW1 code defines a metal case with an acrylic coating that resists corrosion during installation and service. Nitrile rubber tolerates animal and vegetable oils plus light heating oil without swelling. A single lip and carbon steel spring maintain contact pressure up to 10 psi while the shaft turns.

Speed and Pressure Boundaries

Maximum rotational speed is rated at 3,420 RPM, which corresponds to a surface speed of 6.56 mps. The seal is limited to 10 psi differential pressure; higher pressures or speeds will cause premature lip wear or extrusion. It does not suit high-pressure hydraulic circuits or ultra-high-speed spindles.

Highlights

  • CRW1 design ensures reliable rotary shaft sealing
  • Nitrile rubber lip resists oil, fuel, grease and hot water
  • 438 in bore fits precise shaft dimensions
  • Spring-loaded carbon steel lip maintains contact up to 3,420 RPM
  • Acrylic-coated case protects against corrosion in harsh environments

Specifications

BrandSKF
ColorTransparent
Width5/16"

Questions about this item

How often should the NBR lip on this CRW1 seal be inspected for wear?

Inspect the nitrile rubber lip at each scheduled service interval; replace it if the lip shows hardening, cracking or a flattened contact band from the 10 psi pressure limit.

What rotational speed marks the practical ceiling for continuous operation?

The seal is rated to 3,420 RPM and 6.56 m/s surface speed; sustained running at or above that limit will accelerate lip wear and heat buildup.

How hot does the seal area get during all-day operation at rated speed?

Friction at 3,420 RPM with a single nitrile lip against carbon-steel spring tension raises local temperature, so monitor housing heat and ensure adequate lubrication to stay within NBR limits.

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