(22.7kg)(BELL-HMR-ACT-50)For driving existing mechanical bell hammers. For 10lbs (4.5kg) and less hammer weight see BELL-HMR-ACT-10 MECHANICAL SPECIFICATIONS Up to 50lb (22.7kg) bell hammer. 2 sec min between bell strikes. Pull distance 5"(12.7cm) -10"(25.4cm) ELECTRICAL SPECIFICATIONS 115VAC 60 HZ 8 Amp (240/50HZ available) 24VAC Trigger signal. Gear motor with Electronic Brake.