A method and means of locating parts on revolving arbors or mandrels

1,014,410. Mandrels. F. HURTH, and H. HURTH. Nov. 24, 1964 [Feb. 4, 1964], No. 47711/64. Headings B3B and B3K. An arbor or mandrel comprises means for applying an eccentric force to a tool or workpiece if it is not running true. A hob 15 is secured by a nut 17 and a collar 16 to an arbor 11 clamped between centres by a draw-bar 14. Due to clearances and lack of complete contact between the faces of the nut and hob, a force may be applied to the tool which causes the arbor to be slightly bowed. The bow is corrected by the rotation of adjusting screws passing axially through the nut. The hob may be clamped solely by the screws. In a modification, the screws 21, Fig. 3, are carried by a collar 22 which is secured by a nut 24 and a spacing sleeve 23. In a further modification, screws 31, Fig. 4, are provided in the collar 30 also. In a further modification, only one screw is provided. In a final modification, the screws are replaced by wedges or keys.