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Transparent nitrile rotary shaft seal, thin circular ring with single lip

SKF

SKF 19748 Rotary Shaft Seal 2 x 2.5 x .25 in HM1 R Nitrile

SKU CH-HXG4-C6KD7

Rotary shaft seal with 2 in inside diameter, 2.5 in outside diameter and .25 in width for grease-lubricated agricultural machinery up to 970 RPM

  • ColorTransparent
  • Width1/4"
  • SKF quality for reliable sealing performance
  • Nitrile lip handles oils, greases and fuels
  • HM1 R design suits grease-lubricated farm machinery
  • 2 970 RPM rating matches high-speed shafts
  • 2 in ID, 2.5 in OD, .25 in width fits standard housings

SKF 19748 Rotary Shaft Seal

The SKF 19748 is a nitrile rotary shaft seal built for grease-lubricated agricultural machinery. It fits a 2 inch shaft inside a 2.5 inch bore with a 0.25 inch width. The single-lip HM1 R design handles animal and vegetable oils, diesel, gasoline, greases, hot water, light heating oil and mineral oils. It is not for buyers who need higher pressure ratings or multi-lip sealing.

Nitrile Lip and Uncoated Case

Nitrile rubber resists the listed fluids while the uncoated metal case presses into standard housings without extra surface treatments. The contact-type seal rides directly on the shaft and the design omits a garter spring, simplifying installation. Maximum rotational speed is 2,970 RPM at a pressure limit of 3 psi. Builders who need spring-loaded lips or coated cases for corrosion protection should look elsewhere.

Ready-to-Install Single Seal

The package contains the seal only; no installation tools, lubricants or additional hardware are bundled. Technicians must supply their own press or driver and compatible grease for initial lubrication. No software or digital assets accompany this mechanical component. Shops requiring kits with multiple sizes or assembly aids will need separate purchases.

Highlights

  • SKF quality for reliable sealing performance
  • Nitrile lip handles oils, greases and fuels
  • HM1 R design suits grease-lubricated farm machinery
  • 2 970 RPM rating matches high-speed shafts
  • 2 in ID, 2.5 in OD, .25 in width fits standard housings

Specifications

BrandSKF
ColorTransparent
Width1/4"

Questions about this item

What does the HM1 R design code mean for the 19748 seal's pressure limit?

The HM1 R design is a single-lip contact seal rated for a maximum of 3 psi in grease-lubricated applications.

What bore and shaft diameters does the 19748 seal fit?

It fits a 2.5 in bore and seals on a 2 in shaft with a 0.25 in overall width.

How do I install the 19748 nitrile seal without damaging the lip?

Lubricate the lip and shaft, then press the seal squarely into the bore using a driver that contacts only the outer case.

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