Boring tool for working bores of small diameter

Details Boring tool for working bores of small diameter Boring tool for working bores of small diameter

1974-10-17

1976-06-15

Simpson, Othell M.

Cutting by use of rotating axially moving tool

Tool or tool with support

408713, B23B 5100

Patent

active

039633667

ABSTRACT:
A boring tool for working a small diameter bore in a workpiece having a shaft of circular cross-section comprising a clamping portion for supporting the tool and a neck portion extending forwardly therefrom. The forward end of the neck portion carries a cutting plate. The cutting plate is located entirely within the circular cross-section of the neck portion, except for a cutting point on such cutting plate which extends somewhat laterally beyond the circular cross-section of the neck portion. The neck portion has a channel of semicircular cross-section which spirals from the front end thereof toward the clamping portion of the shaft, the spiral being in the directions of rotation and of feed of the workpiece with respect to the tool. In a modification, a cuttings breaker is mounted to overlie the cutting plate, extends close to the cutting point and has an axially extending cuttings breaking channel running the length thereof parallel to the axis of the neck portion and opening toward the cutting plate. Such cuttings breaking channel conveys cuttings from the cutting point to the spiral, circular cross-section cuttings channel in the neck portion.

REFERENCES:
patent: 1887374 (1932-11-01), Emmons
patent: 3147645 (1964-09-01), Cooper
patent: 3354526 (1967-11-01), Erkfritz
patent: 3376763 (1968-04-01), Welles

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