Screw tap with lubrication and extraction bores

Details Screw tap with lubrication and extraction bores Screw tap with lubrication and extraction bores

1987-03-16

1988-08-09

Weidenfeld, Gil

Cutting by use of rotating axially moving tool

With means to apply transient, fluent medium to work or product

Including tool with duct

10141R, 408 57, 408222, B23B 5106, B23G 506

Patent

active

047624442

ABSTRACT:
A tap for forming threads on the inside of a bore which includes a hexagonal central pilot bore and transverse dihedral shafts constituting means for extracting a tap broken within a bore and also constituting means for depositing lubrication or coolant or introducing pressurized air to the cutting dies of the tap. Slots are formed in the distal end of the tap to allow a flat bladed instrument to be inserted for removal of a broken tap part.

REFERENCES:
patent: 83371 (1868-10-01), Foster
patent: 2335741 (1943-11-01), Contaldi
patent: 4651374 (1987-03-01), Turchan

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