BEARING ITALIA S.P.A

NSK 30bd5222dum6 Bearing

 

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 2000238 Radial shaft seals for heavy industrial applications
skf 2000238 Radial shaft seals for heavy industrial applications
7/16-20
0.5620 in
skf 1150250 Radial shaft seals for heavy industrial applications
skf 1150250 Radial shaft seals for heavy industrial applications
1024 mm
13200 kN
skf 650x710x25 HDS2 R Radial shaft seals for heavy industrial applications
skf 650x710x25 HDS2 R Radial shaft seals for heavy industrial applications
Female Threaded
Alloy Steel Heat Tre
skf 1550550 Radial shaft seals for heavy industrial applications
skf 1550550 Radial shaft seals for heavy industrial applications
1830 kgf
40 mm
skf 920x984x25 HDS1 V Radial shaft seals for heavy industrial applications
skf 920x984x25 HDS1 V Radial shaft seals for heavy industrial applications
Plain
Lead, PTFE
skf 3125544 Radial shaft seals for heavy industrial applications
skf 3125544 Radial shaft seals for heavy industrial applications
111000 lbf
42500 lbf
skf 440x480x20 HDS1 V Radial shaft seals for heavy industrial applications
skf 440x480x20 HDS1 V Radial shaft seals for heavy industrial applications
52100 Bearing Steel
5.5625 in
skf 1525250 Radial shaft seals for heavy industrial applications
skf 1525250 Radial shaft seals for heavy industrial applications
5700 lbf
Non-Expansion Bearin
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