Patent ID: 7600951

Claim:
An end mill having a plurality of quick change insert holders for cutter inserts on machine tools, each of the plurality of quick change tool holders comprising: a housing which is adapted to receive and conform to the shape of a cutter insert, a clamping arm mounted in the insert housing, the clamping arm movable in the insert housing, the clamping arm having a clamp portion extending over the cutter insert, the clamp portion adapted to engage the cutter insert, the clamping arm being mounted by axle and an elongated hole wherein when the clamping portion engages the cutter insert the elongated hole acts to pull the cutter insert firmly against the housing to provide a firm clamping position; and a locking mechanism completely contained within the housing, the locking mechanism having a clamp position which forces the clamp portion of the clamping arm to engage the cutter insert, the locking mechanism having a release position which forces the clamp portion to disengage from a cutter insert to allow removal and replacement of said cutter insert, the locking mechanism being movable between the release position and the clamp position.