14383, SKF, Radial shaft seal with metal case and SKF Wave lip
Radial shaft seal, Metal-cased, Nitrile rubber (NBR), Single lip, 36.53, 63.55, 7.95, 7.95, EAN code:85311014144
145X180X12 HMS5 V, SKF, Radial shaft seal with rubber outside diameter and single sealing lip
Radial shaft seal, Rubber (Metal reinforced), Fluoro rubber (FKM), Single lip, 145, 180, 12, 12, EAN code:07316574897605
14855, SKF, Radial shaft seal with metal case and SKF Wave lip
Radial shaft seal, Metal-cased, Nitrile rubber (NBR), Single lip, 38.1, 50.8, 7.95, 7.95, EAN code:85311014779
16054, SKF, Radial shaft seal with metal case and SKF Wave lip
Radial shaft seal, Metal-cased, Nitrile rubber (NBR), Single lip, 41.28, 53.98, 6.35, 6.35, EAN code:85311016612
162100025-R21, Neutral, Radial shaft seal
Seal, Rubber (Metal reinforced), Nitrile rubber (NBR), Single lip, 25.4, 41.275, 6.35, 1, 1.625, 0.25
16338, SKF, Seal with a single steel case, SKF WAVE lip and a carbon steel garter spring.
Seal, Metal-cased with sealant coating on the outside diameter, Fluoro rubber (FKM), Single lip, 0, EAN code:ERROR: #N/A
168118037-R23, Neutral, Radial shaft seal
Seal, Rubber (Metal reinforced), Nitrile rubber (NBR), Double lip, 30.1625, 42.8625, 9.525, 1.1875, 1.6875, 0.375
20X28X6-BAFUD1X7-902, Freudenberg Sealing Technologies, Radial Shaft Seal - Simmerring®
FST Code : 40413497, Rubber (Metal reinforced), Nitrile rubber (NBR), Single lip, 20, 28, 6
20X30X5-BAUM1SLX27-585, Freudenberg Sealing Technologies, Radial Shaft Seal - Simmerring®
FST Code : 40413322, Rubber (Metal reinforced), Fluoro rubber (FKM), Double lip, 20, 30, 5
20X32X6-BABSL05F-595, Freudenberg Sealing Technologies, Radial Shaft Seal - Simmerring®
FST Code : 40413258, Rubber (Metal reinforced), Fluoro rubber (FKM), Double lip, 20, 32, 6
20X32X7-BAB1SL05-902, Freudenberg Sealing Technologies, Radial Shaft Seal - Simmerring®
FST Code : 40413720, Rubber (Metal reinforced), Nitrile rubber (NBR), Double lip, 20, 32, 7
20X32X7-BAU2X2-902, Freudenberg Sealing Technologies, Radial Shaft Seal - Simmerring®
FST Code : 40413835, Rubber (Metal reinforced), Nitrile rubber (NBR), Single lip, 20, 32, 7
20X34X7 HMSA10 V, SKF, Radial shaft seal with rubber outside diameter and single sealing lip
Radial shaft seal, Rubber (Metal reinforced), Fluoro rubber (FKM), Double lip, 20, 34, 7, 7, EAN code:07316572542699
20X36X7-R21, Neutral, Radial shaft seal
Seal, Rubber (Metal reinforced), Nitrile rubber (NBR), Single lip, 20, 36, 7
20X38X8-BA-902, Freudenberg Sealing Technologies, Radial Shaft Seal - Simmerring®
FST Code : 40411159, Rubber (Metal reinforced), Nitrile rubber (NBR), Single lip, 20, 38, 8
20X40X7-BAB1SL05-595, Freudenberg Sealing Technologies, Radial Shaft Seal - Simmerring®
FST Code : 40412997, Rubber (Metal reinforced), Fluoro rubber (FKM), Double lip, 20, 40, 7
20X40X7-BAB2SL05-902, Freudenberg Sealing Technologies, Radial Shaft Seal - Simmerring®
FST Code : 40413626, Rubber (Metal reinforced), Nitrile rubber (NBR), Double lip, 20, 40, 7
20X40X7-BAU2X2-902, Freudenberg Sealing Technologies, Radial Shaft Seal - Simmerring®
FST Code : 40413464, Rubber (Metal reinforced), Nitrile rubber (NBR), Single lip, 20, 40, 7
20X42X7 HMS5 RG, SKF, Radial shaft seal with rubber outside diameter and single sealing lip
Radial shaft seal, Rubber (Metal reinforced), Nitrile rubber (NBR), Single lip, 20, 42, 7, 7, EAN code:07316572032046
20X42X7 HMSA10RG, SKF, Radial shaft seal
Seal, Rubber (Metal reinforced), Nitrile rubber (NBR), Double lip, 20, 42, 7, 7, EAN code:ERROR: #N/A
Radial shaft seals
Radial shaft seals are used between rotating and stationary machine components or between two components in relative motion and consist of two main parts:
- A cylindrical outer covering of sheet steel (case) or an elastomer that has the requisite interference fit to seal statically against the housing bore.
- A sealing lip made of an elastomeric or thermoplastic material that seals dynamically and statically against the shaft. The lip has a sealing edge that is formed by moulding, cutting or grinding. It is normally pressed against the counterface surface of the shaft, with a defined radial load, by a garter spring. The edge of the sealing lip and the shaft counterface surface form the most important functional area of a radial shaft seal. The sealing effect of the lip can be enhanced by designing the contact area of the lip with hydrodynamic features.
Some radial shaft seal designs have an auxiliary lip that protects the primary sealing lip from dust and other contaminants. A suitable lubricant in the space between the primary sealing lip and the auxiliary lip can reduce wear and delay corrosion. Contaminants that have passed the auxiliary lip will eventually cause damage in the counterface surface area. A build-up of heat can also occur between the two lips, resulting in premature wear.
Radial shaft seals are used in a multitude of applications. Because of the importance of radial shaft seals for the operational reliability and service life of machines and equipment, both seal manufacturers and users are equally interested, to some degree, in standardization. These cover boundary dimensions, tolerances, material specifications, test methods and terminology as well as the basic outside diameter constructions and sealing lip arrangements.
The terminology used in this chapter is listed for metal-cased seal and for rubber outside diameter seal.
Maintenance:
- Regularly inspect seals for signs of wear or damage.
- Ensure proper installation to avoid leaks and premature failure.
- Replace seals as part of routine maintenance to maintain system performance.