Radial shaft seals for heavy industrial applications

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Radial shaft seals sit between rotating and stationary components, or two components in relative motion. They have two main parts. One is a cylindrical outer covering with an interference fit that seals statically against the housing bore. The second, a sealing lip, seals dynamically and statically against the shaft. Its sealing edge presses against the counterface surface of the shaft with a defined radial load.Radial shaft seals, also known as lip seals, are used to seal rotary elements, such as a shaft or rotating bore. Common examples include strut seals, hydraulic pump seals, axle seals, power steering seals, and valve stem seals. Early radial shaft seals utilized rawhide as the sealing element, and many elastomeric seal companies today once were tanneries. The advent of modern elastomers replaced rawhide, industry also added a garter spring which helps the sealing lip compensate for lip wear and elastomer material changes.

The seal construction will consist of a sprung main sealing lip which has a point contact with the shaft. The point contact is formed by two angles, with the air side angle usually less than the oil side angle. Depending on the seal type these two angles are varied to create a pressure distribution at the seal contact point which has a steeper slope on the oil side of the seal. The shallower the slope on the oil side of the seal the wetter the seal will run. The spring is positioned such that axially the centerline of the spring is biased to the air side of the lip contact point.

skf 2000238 Radial shaft seals for heavy industrial applications

2 mm 2.080 kg
33 mm 77 mm

skf 1150250 Radial shaft seals for heavy industrial applications

419.1 mm 379.89 g
103.188 mm 5/8-11 UNC

skf 610x660x20 HDS2 R Radial shaft seals for heavy industrial applications

25 1.04
0.12 kg 1.12

skf 650x710x25 HDS2 R Radial shaft seals for heavy industrial applications

34.5 kN 29.5 mm
223 kN 2

skf 1550550 Radial shaft seals for heavy industrial applications

38.1 mm SNW 18x3.1/8
49.809 mm 0.625 in

skf 920x984x25 HDS1 V Radial shaft seals for heavy industrial applications

152.797 mm 4500 r/min
44.5 kN 4.763 mm

skf 300x360x25 HDS2 V Radial shaft seals for heavy industrial applications

465,000 N 169 mm
Single Row 68 mm

skf 440x480x20 HDS1 V Radial shaft seals for heavy industrial applications

3600 r/min 0.6 mm
45 mm 39.6 mm

skf 1525250 Radial shaft seals for heavy industrial applications

0.5 mm 69.5 kN
0.4 kg 0.1
1/13