Type DO in Bearing Steel

Also known as Heavy Duty Seals, these seals are used in rotating applications. They function well in harsh environments where they have to withstand the ingress of rough and abrasive external media. Type DO is the most common form that uses an O-Ring as a secondary sealing element. Depending on seal type the following standard elastomers are used: - Type DO - Cast Iron and Acrylonitrile Butadiene Rubber (NBR) - Type DO - Bearing Steel (1.3505) Acrylonitrile Butadiene Rubber (NBR)

Seal Capabilities

  • Size Range: 90 mm to 429,2 mm
  • Temperature: -30 °C to 150 °C
  • Pressure (max): 0,15 MPa
  • Speed (max) 2,2 m/s

Material Information for the product(s) on this page 


Basic Material
Commercial Description
A forged roller bearing steel(100CR6). Seals made from this material are manufactured by copy turning followed by induction or salt bath hardening. The hardness is 58 to 63 HRC. The seal faces of these parts are also lapped and polished.
Product No. Material dmax. (mm) Outer diameter Da (mm) Width L (mm) Price
(per piece)