BEARING ITALIA S.P.A

Radial shaft seals for heavy industrial applications

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 528720 Radial shaft seals for heavy industrial applications
200
Agriculture Bearing
skf 90020 Radial shaft seals for heavy industrial applications
64000 N
Steel
skf 3900564 Radial shaft seals for heavy industrial applications
Round
0.3 mm
skf 270x310x20 HS8 R1 Radial shaft seals for heavy industrial applications
0.020 in
Ambient
skf 340x372x16 HDS1 R Radial shaft seals for heavy industrial applications
118000 lb
16.5000 in
skf 320x360x18 HDS1 R Radial shaft seals for heavy industrial applications
skf
320x360x18 HDS1 R
skf 91235 Radial shaft seals for heavy industrial applications
Four-Bolt Base
4.9375 in
skf 320x380x28 HDSA2 RD Radial shaft seals for heavy industrial applications
5000 lb
1.3440 in
skf 3400534 Radial shaft seals for heavy industrial applications
1.4530 in
Double Sealed
skf 90023 Radial shaft seals for heavy industrial applications
22200
61-1/2 in
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