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Oil seal OS-N21

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  1. Hattemerbroek 807 items
  2. Central warehouse 16 items
  1. Oil Seal FKM (Pressure version) Type: OS-N21
    Dimensions: 10 x 19 x 7
    Part number: 135138
    In Stock
    More Details
  2. Oil Seal NBR (Pressure version) Type: OS-N21
    Dimensions: 10 x 19 x 7
    Part number: 326860
    In Stock
    More Details
  3. Oil Seal FKM (Pressure version) Type: OS-N21
    Dimensions: 10 x 20 x 6
    Part number: 6525912
    In Stock
    More Details
  4. Oil Seal NBR (Pressure version) Type: OS-N21
    Dimensions: 10 x 20 x 6
    Part number: 198609
    In Stock
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  5. Oil Seal NBR (Pressure version) Type: OS-N21
    Dimensions: 10 x 20.7 x 4
    Part number: 6525916
    Delivery time: 4 weeks
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  6. Oil Seal FKM (Pressure version) Type: OS-N21
    Dimensions: 10 x 22 x 5
    Part number: 720921
    In Stock
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912 items

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OS-N21

Description

  • Pressure loadable radial shaft seal
  • Elastomer-coated OD, flat
  • Short spring-loaded sealing lip
  • Protective lip against entry of contamination from outside (dust, dirt,...)


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
  • Efficient protection against air side contaminations


Applications e.g.:

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

For housings with increased surface roughness


Materials

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
Silicone
ACM
HNBR
CR
EPDM
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

Shaft

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



Installation

Please read our installation instructions.

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