Cleveland HSS M2 Rectangular Tool Bit 851 3/8x1/2x4 in

Rectangular HSS Tool Bit 851

This Cleveland high-speed steel blank is ground to a 3/8 by 1/2 inch rectangular cross-section and measures 4 inches overall. It serves machinists and maintenance technicians who grind custom lathe tools for turning, facing or threading operations. The non-beveled geometry allows the user to shape any relief or rake angle required by the workpiece material. It is not suited for applications that demand pre-ground cutting geometry or indexable inserts.

Capacity and headroom for custom grinding

The 4-inch length provides enough shank engagement for standard tool holders while leaving ample material for repeated regrinds over the tool’s service life. High-speed steel M2 composition retains hardness at elevated cutting temperatures encountered in mild steel, cast iron and non-ferrous alloys. The blank will not satisfy users who need carbide wear resistance for high-volume production or exotic alloys that exceed HSS temperature limits.

No accessories alter the blank

The item ships as a single unground rectangular bar without coatings, handles, holders or grinding jigs. All cutting geometry must be produced by the end user on a bench grinder or tool-room grinder. There is no bundled software, documentation or sharpening guide that changes the preparation workflow. Buyers who want ready-to-cut tooling must look elsewhere.