... Clamping type, 2 screws for clamping 2.High torque capacity & excellent response IBEST manufactures high quality flexible coupling, which function in in ... steel spring flexible coupling, clamping type, 2 screws for clamping. * High torque capacity and excellent response. * Zero backlash. * Spring action bellows ... Standard hole 4mm, 5mm. 6mm, 6.35mm, 8mm, 10mm. * Torque <4.0Nm for D=23mm, <12.0 Nm for D ...