Patent ID: 8308405

Claim:
A cutter holder configured for attachment to a rotary tool spindle, the cutter holder comprising: a holder body having: a first end; a second end; a middle; an insert part formed on the first end and having a conically-shaped peripheral surface configured for being inserted in and mated with a corresponding conically-shaped inner surface of the tool spindle; a mounting part formed on the middle of the holder body, connected with the insert part and having: an outer thread formed around the mounting part; the cutter holder also comprising a sleeve mounted around the mounting part of the holder part and having: two ends; an inner surface; an abutting face formed on one of the ends of the sleeve and facing the insert part and configured for abutting an end face of the tool spindle when the conical outer surface of the insert part is mated with the inner surface of the tool spindle when the sleeve is mounted around the mounting part; an inner thread formed in the inner surface of the sleeve and screwed with the outer thread of the mounting part to make the sleeve adjustable in position relative to the holder body; multiple screw holes separately defined through the sleeve; multiple setscrews mounted in corresponding screw holes and abutting the mounting part.