Boring tool for boring holes of substantial length

Details Boring tool for boring holes of substantial length Boring tool for boring holes of substantial length

1979-06-25

1981-04-28

Bray, W. Donald

Cutting by use of rotating axially moving tool

With work-engaging structure other than tool or tool-support

Frictionally engaging sides of opening in work

175384, 175408, 408705, B23B 5104

Patent

active

042642469

ABSTRACT:
The present boring head is constructed for drilling or boring deep holes or bores of substantial axial length whereby so-called veering off from the longitudinal boring axis is to be prevented. For this purpose three cutting members are distributed about the circumference of a base in such a manner that the cutting members are located at 0.degree., 95.degree., and 190.degree. with a position tolerance of .+-.5.degree. for each cutting member relative to a polar coordinate system. At least one guide rod is arranged at an angle of 55.degree. and another guide rod is located at an angle of 305.degree.. Each guide rod position may have a tolerance of .+-.10.degree. in said polar coordinate system.

REFERENCES:
patent: 4133399 (1979-01-01), Herrmann

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