# US 5,003,852 A · Button die holder

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- Number: US 5,003,852 A
- Document ID: US5003852A
- Status: Granted
- Kind: A
- Application number: 07/078,168
- Filed: 1987-07-27
- Granted: 1991-04-02
- Earliest claimed: 1987-07-27
- Inventors: Michael J. Kelly
- Web page: https://patentgrep.com/patent/US5003852A

## CPC

- B23G 1/48: for guiding the threading tools
- B23G 2210/08: External threads
- B23G 2240/32: Threading devices designed to be mounted in the tailstock of a lathe
- Y10T 82/20: Lathe for screw cutting
- Y10T 82/2585: Tool rest
- B23G: THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH (making helical grooves by turning B23B5/48, by milling B23C3/32, by forging, pressing, or hammering B21K1/56, by grinding B24B19/02; arrangements for copying or controlling B23Q; thread-forming by corrugating tubes B21D15/04, by rolling B21H3/02)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A die holder comprises a die housing and a guide bar. The guide bar is designed to be retained within a Jacob's chuck retained within a lathe tailstock, and the die housing is slidably movable along the guide bar. A button die is retained within the die housing and with the guide bar aligned with the bar stock workpiece held by the lathe headstock, the die housing may be brought into engagement with the workpiece so that the button die engages the same. A user may then grasp the die holder while the headstock and workpiece are rotating so as to effect a cutting of threads. A reverse rotation of the headstock will result in a disengagement of the die holder.

## Claims

### Claim 1

A new and improved button die holder for use with a metal cutting lathe, said die holder comprising:
die housing means for holding a button die:
and
guide bar means upon which die housing means is slidably positioned, said guide bar means serving to guide said die housing means and said button die into a thread cutting engagement with a workpiece operably mounted in said lathe, said guide bar means being slidably positionable through substantially an entire length portion of said die housing means, thereby to provide maximum stability to said die during said thread cutting engagement, and wherein said guide bar means is selectively abutable against said button die retained within said die housing means, and wherein said die housing means is of a cylindrical construction and includes a through-extending axially aligned aperture in which said guide bar means is positioned, and wherein said guide bar means is of a cylindrical construction and is designed to be retained within a tailstock associated with said lathe, and wherein said workpiece is retained within a headstock associated with said lathe, and wherein said workpiece extends into an interior portion of said die housing means during said thread cutting engagement, and wherein said interior portion comprises said aperture, and wherein said guide bar means is provided for with an axially aligned forwardly positioned bore which defines a hollow interior portion of said guide bar means, and wherein said guide bar means remains substantially positioned within an entire length portion of said aperture.