Cutting by use of rotating axially moving tool – Tool-support – With tool-retaining means
Patent
1988-09-08
1990-02-13
Howell, Daniel
Cutting by use of rotating axially moving tool
Tool-support
With tool-retaining means
279 1B, 279 22, 279 75, B23B 3104
Patent
active
049002023
ABSTRACT:
A chuck assembly for a tool bit includes a spindle with a quick release mechanism and is adapted to prevent undesired axial extraction of the tool bit from the spindle. The tool bit includes a shank portion with a circumferential groove. A longitudinally extending bore is provided in the spindle for receiving the shank portion of the tool bit. The shank is retained in the bore by detent balls extending into the bore and against the circumferential groove. The balls are disposed around the shank in an opposing manner to help center the shank. Attempted axial extraction of the tool bit from the bore without release of the balls locks the balls against a retaining face and a biased locking shoulder preventing extraction of the tool bit from the bore.
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