Ogura Corporation, Ogura Clutch, Ring Spring Clutch, Over Torque Protection Device, electromagnetic clutch, ogura corporation, ogura clutch, over torque protection device, electromagnetic actuating coil, cold forging, ring spring clutch, leaf spring clutch, rivet damper clutch, compact ARTC clutch Ogura utilizes computer aided design, 3D modeling and computer analysis prior to cutting the first piece of metal for prototype components. Computer analysis includes finite element analysis and computer analysis of the magnetic flux circuit.