15rpm
A - Uniform: (Standard Duty:- 1 - 1.1) Screw Feeders for light materials, fans, assembly lines, conveyor belts for light materials, small mixers, lifts, cleaning machines, filters, control machines.
B - Moderate shocks: (Medium Duty:- 1.2 - 1.3) Winding devices, woodworking machine feeders, goods lifts, balancers, threading machines, medium mixers, conveyor belts for heavy materials, winches, sliding doors, fertilizer scrapers, packing machines, concrete mixers, crane mechanisms, milling cutters, folding machines, gear pumps.
C - Heavy shocks: (Heavy Duty:- 1.4+) Mixers for heavy materials, sheers, presses, centrifuges, rotating supports, winches and lifts for heavy materials, grinding lathes, stone mills, bucket elevators, drilling machines, hammer mills, cam presses, folding machines, turntables, tumbling barrels, vibrators, shredders.