Fixed ratio 42mm epicyclic geared motors re 975 mfa 975d5041 epicyclic metal gearbox 5041 gear ratio planetary gear 6 to 12v voltage rating 413w power rating 7000rpm no load speed 5700rpm maximum speed 55a load current 30000g cm maximum continuous torque 90000g cm stall torque 446mm diameter 8mm shaft diameter 150mm long 683g weight robust unit boasts a powerful high quality motor sintered bronze bearings high torque transfer from the motor to the gearbox efficiency can