Device for making holes

Cutting by use of rotating axially moving tool – Tool-support with means to move tool relative to tool-support – To move radially

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Details

408185, B23B 2903

Patent

active

044640889

ABSTRACT:
A rotary material removing tool wherein an elongated rod supports a carrier for two elongated knife holders between two legs which flank the carrier and can be biased toward each other and against the carrier by a clamping screw extending transversely of the guide groove and at right angles to the axis of the rod. Those surfaces of the holders which abut against each other have elongated shallow recesses which surround the respective ends of the corresponding slots and receive a plate-like intercepting member having a centrally located hole for the shank of the clamping screw. The recesses extend to the inner ends of the respective holders and toward the knives which are mounted at the outer ends of such holders. The legs of the support close the outer ends of the slots, and the intercepting member serves to prevent penetration of chips, shavings and/or other foreign matter into those ends of the slots which are provided in the abutting surfaces of the holders. The extent to which the recesses extend beyond the slots and toward the respective knives equals or exceeds the length of a slot minus the width of such slot, and the length of the intercepting member at least equals the combined length of two slots minus the width of a slot. This ensures that the intercepting member invariably closes such portions of the respective ends of the two slots which are not overlapped by the holders.

REFERENCES:
patent: 2811056 (1957-10-01), Hutto, Jr.
patent: 4006995 (1977-02-01), Gruner
patent: 4164381 (1979-08-01), Lovendahl
patent: 4405268 (1983-09-01), Abe

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