Hello friends! here is another problem i have to discuss. usually motors have 2,3 or four holes on front face to fasten them on their mounts. i have a maxon dc motor of dia 1mm which does not have holes to mount rather it has threads on its one step just coincident with shaft but having dia greater than its shaft. i have to mount the motor by fastening through its outer threads and inner threads on motor housing. will the motor loosen during working? how to avoid its loosening?