Device for tapping bores

Details Device for tapping bores Device for tapping bores

1974-10-11

1976-06-29

Lanham, C. W.

Cutting by use of rotating axially moving tool

Tool-support with means to move tool relative to tool-support

To move radially

10129R, 10139R, B23G 104, B23G 148

Patent

active

039663485

ABSTRACT:
A spindle carrying at its free end one or more transversely extending thread cutters is coaxially inserted into a bore of a workpiece, so that the cutter or cutters will be spaced from the bore wall. An arrangement is provided for rotating the spindle, and another arrangement for tilting the spindle to a position in which it extends skew to the axis of the bore so that the cutter engages and cuts into the bore wall. A further arrangement gradually axially retracts the rotating spindle outwardly of the bore, so that during such retraction the cutter cuts threads into the bore wall.

REFERENCES:
patent: 521922 (1894-06-01), Stevenson
patent: 1782633 (1930-11-01), Schlitz
patent: 1791532 (1931-02-01), Oberly et al.
patent: 2157248 (1939-05-01), Swanson
patent: 2295135 (1942-09-01), Smith
patent: 2734402 (1956-02-01), Hoern
patent: 3661470 (1972-05-01), O'Pry
patent: 3812763 (1974-05-01), Neshumaev et al.

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