Tapping collet

Chucks or sockets – Socket type – Spring biased jaws

Patent

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Details

279156, 408222, 470103, B23B 3120

Patent

active

056368518

ABSTRACT:
A tapping collet is actuated by engagement with a mating surface of a collet holder for holding a tap having a round shank portion and a square shank portion. The collet has a plurality of independent gripping jaws circumferentially disposed at essentially 90 degree intervals about a centerline axis through the collet. The gripping jaws have an inner face parallel to the centerline axis and an outer face which defines an outer surface for engaging a collet holder mating surface. Resilient material is disposed between the gripping jaws for holding the jaws in the desired spaced relation. The gripping jaws comprise a step portion which extends radially inward and defines a second inner diameter opening to engage the flat sides of the square shank portion of a tap inserted into the collet. The continuous outer diameter seal is disposed circumferentially about the outer surface of the collet and a continuous inner diameter seal is disposed circumferentially within a first inner diameter opening of the collet.

REFERENCES:
patent: Re19312 (1934-09-01), Glenzer
patent: 1252335 (1918-01-01), Foote
patent: 2346706 (1944-04-01), Stoner
patent: 2829899 (1958-04-01), Drew et al.
patent: 3246903 (1966-04-01), Sattler
patent: 3583714 (1971-06-01), Weltzer et al.
patent: 4795292 (1989-01-01), Dye
patent: 4989887 (1991-02-01), Jordan
patent: 5324050 (1994-06-01), Kanaan
patent: 5383673 (1995-01-01), Mogilnicki
patent: 5405155 (1995-04-01), Kanaan et al.
British Standards Institution --Specification for Machine Tool Components Part 7: 1973.
Entwurf, Aug., 1989 --Deutsche Norm.
Deutsche Normen --Apr., 1961 --Push Out Collets.
Deutsche Norm --Nov., 1957-Drawback Collets and Taper Sleeves for Collets.
Deutsche Normen --May, 1977.
Advertisement --Kennametal --Erickson Rotating NC Tooling.
Advertisement --Jacobs Tap Chucks.
Deutsche Norm --Jul., 1986.
Japanese Industrial Standard --Spring Collets.

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