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Transparent rubber rotary shaft seal with metal spring, 1.125 in ID 1.828 in OD 0.25 in width

SKF

SKF 11171 Rotary Shaft Seal 1.125 in ID 1.828 in OD 0.25 in CRWA1 NBR

SKU CH-AB6Q-WZ6J4

Rotary shaft seal with 1.125 in inside diameter, 1.828 in outside diameter and 0.25 in width, rated for 10 psi and 3,720 RPM

  • ColorTransparent
  • Seals up to 10 psi with twin nitrile lips
  • Handles 3,720 RPM and 5.57 m/s surface speed
  • Fits 1.125 in shaft and 1.828 in bore precisely
  • Compatible with diesel, gasoline, oils, grease and hot water
  • CRWA1 design with carbon-steel spring and acrylic-coated case

Rotary Shaft Seal CRWA1

The SKF 11171 rotary shaft seal fits shafts with a 1.125 in inside diameter and seats in a 1.828 in bore. Its nitrile rubber lips and carbon steel spring suit engines, pumps or gearboxes handling mineral oils, gasoline, diesel, greases, animal or vegetable oils and hot water. The acrylic-coated case installs in inch-dimensioned housings.

Pressure and speed limits

Rated for 10 psi maximum pressure and 3,720 RPM maximum rotational speed, the seal reaches a 5.57 mps surface-speed ceiling. The dual-lip contact design handles splash and low-pressure sealing but cannot withstand high-pressure hydraulic systems or sustained speeds beyond the stated limit.

Shaft and bore dimensions

Correct fit depends on the 1.125 in shaft diameter and 1.828 in housing bore matching the seal exactly. A shaft outside this tolerance or a bore that differs will cause leakage or premature wear, so verify both dimensions before ordering.

Highlights

  • Seals up to 10 psi with twin nitrile lips
  • Handles 3,720 RPM and 5.57 m/s surface speed
  • Fits 1.125 in shaft and 1.828 in bore precisely
  • Compatible with diesel, gasoline, oils, grease and hot water
  • CRWA1 design with carbon-steel spring and acrylic-coated case

Specifications

BrandSKF
ColorTransparent

Questions about this item

Should I choose the 1.125 in ID or the 1.828 in OD version?

The seal has a single size: 1.125 in inside diameter and 1.828 in outside diameter. Both figures belong to the same part, so there is no alternative version to select.

What does the 3,720 RPM limit mean when the seal is installed?

It is the maximum shaft speed the two-lip NBR design can handle without overheating or losing contact pressure. Exceeding it shortens seal life and risks leakage.

How does the CRWA1 design code affect the sealing performance?

CRWA1 identifies a double-lip, spring-loaded radial seal with an acrylic-coated case. The carbon-steel spring keeps both lips loaded against the shaft up to 10 psi pressure.

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