Patent attributes
A tool holder assembly includes a tool holder with a shank and a key slot having a surface with an angled portion that forms a non-zero angle with respect to a longitudinal axis of the tool holder assembly. A clamping mechanism includes a support block, a ball canister including a key, and a lock rod. An interference fit key arrangement is provided between the tool holder and the clamping mechanism by an abutment surface located along the first side wall of the key. The abutment surface contacts the angular portion of the key slot to cause the key slot to undergo elastic deformation and allow simultaneous contact between the abutment surface and the angular portion of the key slot and the second side wall of the key and the second surface of the key slot, thereby providing for an interference fit key arrangement between the tool holder and the clamping mechanism when the tool holder assembly is placed in the locked position.
