Drill sharpening tool

Details Drill sharpening tool Drill sharpening tool

B - Operations, Transporting

24

B

51/84

B24B 19/16 (2006.01)

Patent

CA 1249129

ABSTRACT OF THE DISCLOSURE A twist drill sharpening tool comprises a body housing a cylindrical rotatable grindstone of small diameter and a drill holder which can be fitted into a bore in the body so as to hold the tip of a twist drill in contact with the curved surface of the grindstone at a position which is offset from the centreline and inclined at between 10° and 12° from a diametral plane of the grindstone passing through the drill tip contact line with the grindstone. A cam on the body is engaged by a cam follower of the drill holder so as to vary the projection distance of the drill as it is turned about its own axis, carried by the holder. The bore for the drill holder may be formed in part of the body which can be moved to different positions to vary the drill tip angle. - 1 -

515569

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