BELL-HMR-ACT-10)For driving existing mechanical bell hammers. For greater than 10lbs (4.5kg) hammer weight see BELL-HMR-ACT-50 MECHANICAL SPECIFICATIONS Up to 10lb (4.53kg) bell hammer. 1 sec min between bell strikes. Pull Distance 4.5" (11.43cm) ELECTRICAL SPECIFICATIONS 115VAC 60 HZ 1 Amp. (240/50HZ available) 24VAC Trigger signal. Gear motor with Electronic Brake