L&I 533.4640 12.039mm M2 HSS Straight Flute Chucking Reamer

This is a new L&I (Leavitt & Inwood, Winooski, VT) straight-flute chucking reamer, part number 533.4640, ground to 12.039mm diameter in M2 high-speed steel with a tolerance class of D (ISO/ANSI designation indicating a specific plus-tolerance finish diameter for reaming to close fits). M2 HSS provides good wear resistance and toughness for reaming steel, cast iron, and non-ferrous alloys in production drilling and boring operations. The tool features a straight round shank for mounting in drill chucks or collet holders, a multi-flute straight-flute cutting geometry visible at the leading end, and a through-coolant hole at the tip for internal coolant or oil delivery. The 12.039mm ground diameter targets interference or transition fit bores where a standard 12mm reamer would leave insufficient material for a press or locational fit, making this a precision application-specific tool for fixture, jig, or close-tolerance assembly work.

Product Specifications