... hydraulic pumps, motors, bearings, etc., are internationally sourced. The Roller features all-drum infinitely variable speed drive, H/L vibratory frequencies ... :Working mass12000kgAxle load, front drum6000kgAxle load, rear drum6000kgStatic linear load, front drum276N/cmStatic linear load, rear drum276N/cmSpeed range0~10km/hTheoretical climbing ...