Method of forming a tapped hole

Details Method of forming a tapped hole Method of forming a tapped hole

1989-02-28

1989-12-26

Combs, E. Michael

Cutting by use of rotating axially moving tool

Processes

Bit detachable

10 1R, B23G 116, B23B 3500

Patent

active

048894532

ABSTRACT:
A tapped hole produced in a metallic material by threading a preselected standard threaded fastener into an untapped hole formed in the material. The diameter of the hole to be formed is determined by using a formula that takes into account the hardness and thickness of the material to be tapped and the basic major diameter and pitch of the preselected threaded fastener to be used to tap the hole. This formula can only be used with threaded fasteners having threads of the Unified Thread Standard type. This formula is particularly useful in tapping a hole formed in a mounting strap of an electrical wiring device.

REFERENCES:
patent: 1909476 (1933-05-01), Trotter
patent: 1963542 (1934-06-01), Bergstrom
patent: 2113600 (1938-04-01), Olson
patent: 3491974 (1970-01-01), Swanquist
patent: 3575313 (1971-04-01), Trachtenberg et al.
patent: 3701837 (1972-10-01), Fork
patent: 4000874 (1977-01-01), Finley et al.
patent: 4472097 (1984-09-01), Kiefer et al.
patent: 4580689 (1986-04-01), Slater
patent: 4637185 (1987-01-01), Bowman
patent: 4666055 (1987-05-01), Lewis
patent: 4706831 (1987-11-01), Williams, Jr.
Robert O. Parmley, Standard Handbook of Fastening and Joining, published by McGraw-Hill, Section 16, pp. 16-25 (1977).

Affiliated with

Also associated with

Rating

Method of forming a tapped hole does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of forming a tapped hole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of forming a tapped hole will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1574734