Rotary Shaft Seals - 41mm

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:

• Keeping lubricants in: It prevents oils or greases from leaking out of the machine, avoiding excessive wear and potential failure of machinery.
• Keeping contaminants out: It blocks dirt, water, or other environmental contaminants from entering the machinery, protecting the shaft and internal components from damage.

For more sealing solutions, explore our full range of Sealing Products.

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:

• Mechanical seals: Best for high-pressure environments and when minimal leakage is crucial. These feature two flat surfaces, aligned with the rotating shaft and stationary housing, pressed tightly together.
• Lip seals: Also known as radial shaft seals, these are widely used across various sectors for their cost-effectiveness and reliable performance, suitable for moderate pressures and speeds.

Looking for more sealing products? Check out our Hydraulic Damper Fork Seals or O Ring Selection Kits for additional options.

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.

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.