NBR Design AO Rotary Shaft Seal 21x29x4mm [10 Pieces]

This rotary shaft seal has an internal diameter of 21 mm, an external diameter of 29 mm and a 4 mm width. It is used to seal rotating machine components.

This seal consists of an NBR ring with a reinforcement plate. It is designed without the worm spring, intended for minor sealing cases only. Suitable for a shaft circumferential speed of up to 14 m/s.

Changing the seal frequently prevents damage to the housing hole. The seal must be assembled according to DIN 3760 to function optimally.

Pros:

• Suitable for temperatures from -30 to 100°C (-22 to 212°F)
• There is no frictional corrosion thanks to the rubber-elastic jacket

Cons:

• Designed only for minor sealing cases

series

Specifications

Internal diameter (mm) : 21
Seal material : NBR (nitrile rubber)
Outer diameter (mm) : 29
Retaining ring width (mm) : 4
Rotary shaft seal design DIN 3760 : AO (without worm spring)
Min temperature (°C) : -30
Max temperature (°C) : 100
Max circumferential speed (m/s) : 14
Metal reinforcement : Open