NBR Design B Rotary Shaft Seal 21x30x6.5mm [10 Pieces]

This rotary shaft seal has an internal diameter of 21 mm, an external diameter of 30 mm and a 6.5 mm width. It is used to seal rotating machine components.

This seal consists of an NBR part with an external reinforcement plate and a worm spring made of spring steel. The plate is pressed in slightly during installation. To ensure a seal at the outer casing, tighter tolerances of the hole in the housing are required. Suitable for a shaft circumferential speed of up to 14 m/s.

Pros:

• Suitable for temperatures from -30 to 100°C (-22 to 212°F)

series

Specifications

Internal diameter (mm) : 21
Seal material : NBR (nitrile rubber)
Outer diameter (mm) : 30
Material spring : Steel
Retaining ring width (mm) : 6.5
Rotary shaft seal design DIN 3760 : B (single metal sleeve)
Min temperature (°C) : -30
Max temperature (°C) : 100
Alternative designation : B (B1, (TR)C, BB, 822N, DF, SB, WB)
Max circumferential speed (m/s) : 14
Metal jacket : Steel
Metal reinforcement : Fully enclosed