Plug-in holder for centering drill bit

Details Plug-in holder for centering drill bit Plug-in holder for centering drill bit

1991-08-28

1992-12-29

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having axial, core-receiving central portion

279 22, 279 79, 279905, 408240, B23B 5104

Patent

active

051746964

ABSTRACT:
A plug-in holder (2) of a drilling tool has an axially extending central bore for receiving a centering drilling bit. The holder (2) has an opening (5) extending from the bore to its outer surface. A latching element (6) is radially displaceably supported in the opening (5). The bore (4) has inwardly projecting entrainment ridges (9). The latching element (6) holds the centering drill bit in the axial direction while the entrainment ridges (9) engage the bit for rotational displacement.

REFERENCES:
patent: 1858276 (1932-05-01), Miller
patent: 1862337 (1932-06-01), Emrick
patent: 3243924 (1966-04-01), Peters
patent: 4900202 (1990-02-01), Wienhold

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