Radial shaft seals for heavy industrial applications

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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.

In order to exclude contaminants numerous types of dust lips or exclusionary lips may be used. Common elastomers include FKM, ACM, NBR, HNBR, and AEM. In order to resist wear, the compounds' durometer (hardness) is typically 70 to 85 Shore A (between that of an automobile tire and a soft inline-skate wheel).

skf 1400314 Radial shaft seals for heavy industrial applications

Four-Bolt Flange 2.5000 in
Contact with Flinger MUCF200

skf 290x330x18 HDS2 R Radial shaft seals for heavy industrial applications

Cast Iron AISI 52100 Steel
3/4 in 1.5000 in

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

6.7188 in Closed
Powder Coated 3-7/16 in

skf 90019 Radial shaft seals for heavy industrial applications

BHM .664-32
12300 lbs Click here

skf 530x580x22 HDS1 R Radial shaft seals for heavy industrial applications

Maximum of +250 Uncoated
Open 4570 lb

skf 1800257 Radial shaft seals for heavy industrial applications

Open Type 27mm
Steel 3207jc3-qbl

skf 82526 Radial shaft seals for heavy industrial applications

3/8 in Open
11/32 in 430 lbf

skf 1525252 Radial shaft seals for heavy industrial applications

5.5000 in QVVPK
0.8750 in 4.6300 in

skf 290x330x18 HDS2 D Radial shaft seals for heavy industrial applications

17.0000 in Single Row
1.4375 in 053893573618

skf 215x270x23 HDS2 R Radial shaft seals for heavy industrial applications

12mm 3.1
Steel 10mm

skf 82524 Radial shaft seals for heavy industrial applications

UC218-56 Set Screw
Four-Bolt Flange 7.3594 in
2/13