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vibration problem in coal mill gearbox

Nov 06 2013 I recently took a call from a customer at a coalfired power plant in Arkansas He was performing a precision laser shaft alignment of a 450 HP 1750 RPM electric motor coupled by a fluid drive coupling to a gearbox on a coal conveyor Similar to the one pictured above This conveyor is one of two side by side conveyors each is 60 wide by 500 yards long

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