On the ball
Allen wrenches with a ball-shaped tip are particularly practical when it comes to undoing and tightening hex socket screw connections. The BIMERIC servo-controlled production system is used to manufacture this type of Allen wrench at speeds of up to 100 parts per minute. The secret lies in the fact that the ball head is produced without cutting. This is because – unlike machining techniques that involve the removal of material using milling cutters – the grain of the material is not interrupted and the ball neck is therefore particularly strong.
During the manufacturing process, the gripper feed feeds the hexagonal wire to the ring tool which forms a chamfer in the material. The wire is twisted off here, passed on to the hinged multipurpose transfer device and is deburred and smoothed. After the part leaves the turning station, the ball shape is formed in two ring tools before the wrench is then formed and coined with the appropriate markings. Numerous variants and intermediate lengths can be produced depending on the customer’s requirements, while maintaining a constant, high level of machine availability.