High speed drill system

Details High speed drill system High speed drill system

1976-04-14

1977-04-12

Hinson, Harrison L.

Cutting by use of rotating axially moving tool

Tool-support

With tool-retaining means

279 1C, B23B 3110, B23B 522

Patent

active

040172031

ABSTRACT:
The system includes a spindle for holding a high speed drill, the spindle being provided with longitudinal slots permitting its exterior side walls to be biased inwardly and grip the drill. Eccentric weights surround the spindle in such a manner that upon rotation of the spindle at a high speed, the weights are thrown radially outwardly to contract the side walls of the spindle by centrifugal force, thereby gripping the drill shank, the gripping force increasing with the speed of rotation of the spindle. For larger drills, a special collar is provided on the drill shank for engaging flats provided on the spindle to result in a positive locking of the drill shank for rotation with the spindle.

REFERENCES:
patent: 3692319 (1972-09-01), Taylor
patent: 3709508 (1973-01-01), Dudley
patent: 3837661 (1974-09-01), Phillippi

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