+1 440.834.5400
Duramax Marine
Johnson Cutless
Bearing Systems,
Rudder Bearings & Stern Tube Filler
. Advanced
Water-Lubricated Strut, Stern Tube & Rudder Bearing Systems
. Duramax Heat
Exchange Systems
. Duramax Shaft
Seal Systems
. Duramax Impact
Protection Systems
. Duramax
Industrial Products

Duramax “Maintenance-Free” Mechanical
Face Seal Systems.

The Duramax Shaft Seal Systems are available for shafts from 3/4 inch to 6-3/4 inch diameter. The design features of this system eliminate problems that other systems experience, and with no lip seals or packing to change there is no maintenance. It is easy to install, with no need for constant adjustments once properly installed. Removal and replacement of the system is simple.

Key design features of the Duramax Shaft Seal Systems:
Shaft Seal
Stationary Friction Ring

Oil-impregnated nylon sea ring with hose barb connection for air venting or water injection.
Covered Spring Chamber

Provides a secondary water seal for extra backup protection.
Versatile Adapter Ring

Makes it easy to adapt the shaft seal system to your boat.
Self-Centering Shaft Clamp

Split C clamp for non-marring, perfect-aligned grip of propeller shaft.
Rotating Seal Ring

Marine grade, non-corrosive stainless steel, electrically isolated from the shaft by an O-ring.

1786 . Duramax BRZ Shaft Seal System

Economical Choice for Pleasure or Commercial Vessels Mega yacht or passenger ferry.

It comes with a choice of an aluminum or bronze adapter ring housing with an integral mounting flange and back-up Air seal. You can inflate the back-up Air Seal while the shaft is stationary-allowing you to make minor adjustments to the seal and stop water flow in case of catastrophic failure of the seal. The integral mounting flange is un-drilled to make attachment simple-you can use your own bolt pattern.

For shaft diameters 2-1/2” inches to 6-3/4 inches.
1786   Duramax FRP Shaft Seal System

Designed With The Fiberglass Builder In Mind.

Perfect for new fiberglass vessel construction. Features the “Maintenance-Free” Shaft Seal System with an integrated FRP stern tube and a Johnson Cutless bearing. The factory-tested bond between the shaft seal and FRP tube verifies seal attachment to the stern tube. The FRP stern tube saves production time by allowing you to fiberglass the engineered system directly into your boat.
1786   Duramax Weld-On Shaft Seal System

Designed with the Aluminum Builder In Mind.

Ideal when constructing an aluminum vessel. Features the “Maintenance-Free” Shaft Seal System with an aluminum adapter ring. The ring saves production time by allowing the installer to weld the seal assembly directly to the aluminum stern tube-thus eliminating the need for a shaft seal adapter, hose and hose clamps The compression clips pre-compress the tension spring for easier installation.

pdf   Duramax Mechanical Face Seal Brochure



Series Of Mounting Adapters Available.

They make installation of the Duramax Shaft Seal System easy for your vessel. They are designed to simplify installation and reduce retrofit costs.


Duramax Shaft Seal Systems are available for pleasure boat builders and commercial applications.

Shaft Seal Application
Shaft Seal Application
Shaft Seal Application


  Duramax® is a trademark of Duramax Marine® LLC.  

Duramax Marine LLC is an ISO 9001:2008 certified company.
17990 Great Lakes Parkway, Hiram, Ohio 44234 U.S.A.  |  PHONE +1 440.834.5400  |  FAX +1 800.497.9283 USA & Canada or +1 440.834.4950 
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