The clutch assembly of the Disk Power Hammer utilizes two automotive disk brake rotors as friction surfaces with clutch friction material between. The front [right above] brake rotor disk is fastened to the drive shaft. The rear [left above] brake rotor freely rotates and slides on the drive shaft on a bronze bushing. The automotive clutch throw out bearing [far left above] will apply pressure to the powered disk forcing it against the clutch friction material and the fixed disk, thus engaging the clutch.
An "AX" size V-belt grove was cut in the outside surface of the brake rotor. The 1140 RPM drive motor powers the rear brake rotor directly.
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