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Oil seal OS-N34



  • Pressure loadable radial shaft seal
  • Elastomer-coated OD, flat
  • Short spring-loaded sealing lip

Special features

  • Pressure loadable due to special sealing lip design
  • Reliable static sealing inside housing
  • For housings with high thermal expansion, e.g., light metal housing
  • For split housings
  • For housings with increased surface roughness
  • For sealing thin-body and gaseous media
  • No risk of fretting corrosion

Applications e.g.:

  • Rotating / pressurized applications
  • Pressurized units such as pumps or hydraulic motors

Rotating / pressurized applicationsPressurized units such as pumps or hydraulicmotors


Standard material

Elastomer NBR 80 blue
Spring Spring steel according to DIN EN 10270-1
Metal case Carbon steel according to DIN EN 10139

Special materials

Elastomer FKM
Spring Stainless steel 1.4301
Metal case Stainless steel 1.4301

Application parameters

For the standard materials combination

Temperature  -40°C to +100°C                                                                                           
Pressure acc. to table „Operating parameters for rotary shaft seals“
Shaft speed acc. to chart „Operating parameters for rotary shaft seals“
Media Mineral oil based lubricants, synthetic lubricants

When synthetic lubricants are used for which there is no empirical experience, test the compatibility in the laboratory or - better even - in practical trials. The operating temperature should not exceed 80°C.

Design information


Tolerance ISO h11
Hardness min. 45 HRC
Roughness Ra = 0,2 - 0,8 μm
Rz 1-5 μm 
Rmax ≤ 6,3 μm
Surface finish free of orientation (lead free)

Housing bore

Tolerance ISO H8
Roughness Ra = 1,6 - 6,3 μm 
Rz = 10 - 20 μm 
Rmax ≤ 25 μm


Please read our installation instructions.