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Wheel bearing

If you require more information or assistance in finding the precise specifications needed for your application, please contact our sales professionals at Tel:-01425-477787, or email sales@hendersonbearings.co.uk.

There are various designs based on the type of lip used in these seals, such as the R21 which features a single lip for standard sealing, R23 which includes a wiper lip providing additional protection against external contaminants, and R4 which has a metal single lip suitable for heavier duty applications.

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Wheel Bearing Hubassembly

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The materials typically used for Rotary Shaft Seals include Nitrile (NBR) and Viton (FPM). Nitrile is the most common choice due to its excellent compatibility with most mineral oils and greases, operating effectively within temperatures ranging from -65° to 225°F (-54° to 107°C) and generally comes in black. Viton, renowned for its premium qualities, offers a broader temperature range and superior chemical resistance, stretching from -40° to over 400°F (-40° to over 204°C). It effectively resists many lubricants and chemicals that degrade other materials, ensures exceptional wear and abrasion resistance, and is typically coloured brown.

The ideal seal for a rotating shaft largely depends on specific operational factors such as shaft speed, environmental conditions, system pressure and temperature, and the fluid type involved. Popular options include:

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The most commonly used seal for rotating shafts is the lip seal, or radial shaft seal. Characterized by a rubberized layer with a metal insert and a spring to maintain tension, these seals handle moderate speeds and temperatures effectively. Lip seals are preferred in various settings, from automotive engines to industrial machines, due to their affordability, ease of installation, and wide availability.

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O-rings are generally not recommended for sealing rotating shafts due to their suitability for static or slow-moving joints. High-speed rotations can cause O-rings to wear out rapidly due to friction and heat buildup. For such applications, different types of seals should be considered.

A rotary shaft seal is designed to maintain the functionality and efficiency of machinery by sealing the area where a rotating shaft extends through a component's housing. Its key roles are:

These seals are indispensable in systems where maintaining a robust seal between rotating and stationary parts is crucial. They find widespread application across various machinery including motors, pumps, bearings, and gearboxes.

Rotary Shaft Seals, also known as oil seals or lip seals, are critical components designed to prevent lubricant leakage and keep out contaminants, thereby ensuring the smooth operation and longevity of machinery.