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Oil seal OS-B12

52 items

per page
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Inside diameter
Outside diameter
Material sealing lip
Stock Indicator
  1. Zwolle 41 items
  2. Central warehouse 3 items
  1. Oil Seal NBR Type: OS-B12
    Dimensions: 10 x 15 x 3
    Part number: 27199
    In Stock
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  2. Oil Seal NBR Type: OS-B12
    Dimensions: 12 x 16 x 3
    Part number: 85377
    Delivery time: ± 16 weeks
    More Details
  3. Oil Seal NBR Type: OS-B12
    Dimensions: 12.7 x 17.46 x 3.17
    Part number: 68174
    In Stock
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  4. Oil Seal NBR Type: OS-B12
    Dimensions: 14 x 22 x 3
    Part number: 118139
    In Stock
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  5. Oil Seal NBR Type: OS-B12
    Dimensions: 15 x 21 x 3
    Part number: 56357
    In Stock
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  6. Oil Seal NBR Type: OS-B12
    Dimensions: 15 x 32 x 5.5
    Part number: 27013
    Delivery time: ± 20 weeks
    More Details

52 items

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  • Metal OD
  • Non-spring-loaded sealing lip

Special features

  • Non-spring-loaded lip design for secondary sealing jobs e.g., grease sealing
  • Low friction
  • Compact design
  • Little installation space
  • Firm and exact fit inside the housing
  • Be careful when using the product in connection with light metal housings, housings with increased surface roughness and applications with overpressure: Apply sealing aid to the outside diameter if necessary. A version with outside diameter coated with bore sealant is available on request.

Applications e.g.:

  • Secondary sealing jobs
  • Mechanical and apparatus engineering
  • Drive systems
  • Electric motors


Standard material

Elastomer NBR 70 black
Metal case Carbon steel according to DIN EN 10139

Special materials

Elastomer FKM
Metal case Stainless steel 1.4301

Application parameters

For the standard materials combination

Temperature  -40°C to +100°C                                                                                           
Pressure depressurized
Shaft speed max. 6 m/s (and 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 = 0,8 - 3,2 μm 
Rz = 6,3 - 16 μm 
Rmax ≤ 16 μm


Please read our installation instructions.

Mineral oil based lubricants,