About Duraclutch
Simply put, the Duraclutch kit provides smoother starts, better engine braking and longer belt life.
Duraclutch is currently available for the Polaris Ranger, RZR and General UTV's, Sportsman ATV's, Bobcat and Gravely UTVs.
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The Team Behind Duraclutch
They don’t just build the best clutching system available for your Polaris UTV: They’ve been a big part of the Polaris UTV and ATV’s since they were created. These guys are Rock Stars in the world of off-road vehicles who are dedicated to customer service.
How a Duraclutch Works
About Duraclutch - Engagment around 1450 RPM
Notice the shoes and drums have clearance between them which means the shaft can rotate while the sheaves overrun and allow the system to idle. The red compression springs is what sets the engagement speed which is currently set up for 1450 RPM (± 100 RPM)
This means a much smoother start to your vehicle, and increased starting torque, allowing you to pull more weight from a dead stop than you can with a conventional clutching system.
About Duraclutch - No Initial Scrubbing Results in Prolonged Belt Life
You can now see the clearance between the shoes has been eliminated which means the shaft has reached the 1450 RPM speed required to overcome the spring force and the shaft is now driving the sheaves via the two centrifugal clutches (one on the back face of the stationary sheave and one on the back face of the moveable sheave).
In the condition of an overload (in the low to mid sheave position), the frictional force of the centrifugal clutch shoes is lower then the frictional force between the belt and the sheave faces so the clutch will slip and the belt will not get damaged. In the mid to high sheave shift position, the shoes will be fully locked and there will be no efficiency (performance) lost, making the clutch a seamless transition.
It is also important to note that because the centrifugal clutches act as the overrunning device between the shaft and the sheaves, there is always constant pinch between the sheaves and the belt. This means there is no initial scrubbing every time he CVT starts shifting, resulting in prolonged belt life and a lot less maintenance over the life of the vehicle
About Duraclutch - It's Fully Tunable
About Duraclutch - No Performance Loss at the High End
At this point, the two centrifugal clutches that are located within the moveable and stationary sheaves are fully locked to the drums and will now carry more torque than the belt to sheave interface so there is no loss of performance at the high end (throttle wide open).
