NTN-SNR BEARING RULMENTI S.R.L.

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 310x370x25 HDS1 R Radial shaft seals for heavy industrial applications
SCHAEFFLER GROUP
FAG BEARING
skf 1600585 Radial shaft seals for heavy industrial applications
Pillow Block
Triple Lip Contact
skf 1260x1300x18 HDS1 R Radial shaft seals for heavy industrial applications
NACHI
8482.10.50.68
skf 1325340 Radial shaft seals for heavy industrial applications
730489
SFC1000EX3
skf 1300283 Radial shaft seals for heavy industrial applications
Double Row
7.062
skf 80088 Radial shaft seals for heavy industrial applications
Roller Bearings
0.0
skf 470x530x25 HDS2 R Radial shaft seals for heavy industrial applications
1 Piece Solid
2 Bolt Pillow Block
skf 1350542 Radial shaft seals for heavy industrial applications
Single Row Ball Bear
6210RSR
skf 780x830x22 HS5 R Radial shaft seals for heavy industrial applications
NTN
N/A
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Radial shaft seals for heavy industrial applications
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