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 470x510x20 HDS2 V Radial shaft seals for heavy industrial applications
8483.20.40.80
3/4 Inch
skf 2400560 Radial shaft seals for heavy industrial applications
Cylindrical Roller B
B04144
skf 430x480x25 HDS2 R Radial shaft seals for heavy industrial applications
N/A
QM INDUSTRIES
skf 470x530x25 HDS1 D Radial shaft seals for heavy industrial applications
0.078
Cam Follower and Tra
skf 530x575x20 HS5 R Radial shaft seals for heavy industrial applications
12.5 Inch | 317.5Mil
B22459E7L
skf 1300252 Radial shaft seals for heavy industrial applications
6.4 Inch | 162 Milli
4
skf 1450242 Radial shaft seals for heavy industrial applications
ENPRO INDUSTRIES
0.0
skf 260x320x25 HDS2 R Radial shaft seals for heavy industrial applications
1 Inch | 25.4 Millim
Cone; Class 3 Precis
skf 1900211 Radial shaft seals for heavy industrial applications
2.5 LB
Standard
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