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Boston Gear Centric® Centrifugal Clutch for Mine SAG Mill
A large mine grinding mill OEM required a centrifugal clutch solution for a new
SAG mill. The clutch’s primary role is to allow for smooth, controlled starts during
mill startup. It provides protection against the shock loads which occur during the
starting of a rigidly coupled mill drive. In many cases these starting torque loads are
capable of causing serious damage to the mill’s expensive drivetrain components
including the electric motor and speed reducer.
Boston Gear, working closely with a distribution partner, supplied a large, 24 in.
diameter Centric Centrifugal Clutch (CCC) to meet the demanding mill application
requirements. Spring loaded CCC units are designed to automatically engage and
disengage at customer specified RPMs.
The use of Boston Gear centrifugal clutches also sharply reduces motor starting
current requirements and heat losses inherent in the direct starting of a mill drive.
This adds up to reduced power factors, greater efficiency and therefore, greater
economy in motor drives.
- Controlled soft-start
- Protection against shock
loads during start-up
- Automatic engagement
- Delayed engagement
produces a “no load start”
- 100% efficient at full