Device for forming spiral groove on inner wall of cylindrical ca

Details Device for forming spiral groove on inner wall of cylindrical ca Device for forming spiral groove on inner wall of cylindrical ca

1992-08-17

1993-12-14

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

Spherical tool

B21D 1704

Patent

active

052691640

ABSTRACT:
A device for forming a spiral groove on the inner walls of a cylindrical cavity including a rod having a cylindrical recess and pair of through holes, machining balls in the through holes, a tapered support located in the cylindrical recess, whose tapered sides support the machining balls, a spring located between the support and the other end of the cylindrical recess for supporting the support, and a push cap coupled to the aperture of the recess for deciding the location of the support by pressing the support supported by the spring. The device can freely adjust the height of the machining balls protruding from in the through holes according to the inner diameter of a bearing's cylindrical cavity, thereby easily forming spiral grooves of uniform depth.

REFERENCES:
patent: 1273475 (1918-07-01), Foster
patent: 2657733 (1953-11-01), Champion
patent: 4196608 (1980-04-01), Amado, Jr.

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