Cleveland C44576 Tool Bit Blank 5/16in Square M42 Cobalt

Product Description

The CLEVELAND C44576 is a square-ground tool bit blank manufactured from M42 cobalt high-speed steel. It measures 5/16 inches wide by 5/16 inches high with an overall length of 2.5 inches. M42 cobalt grade offers higher red hardness and wear resistance compared to standard M2 high-speed steel, making it well suited for interrupted cuts, hard materials, and applications where tool life is a primary concern. This blank arrives ground on all surfaces, providing a consistent starting geometry for machinists who grind custom tool profiles to their own specifications.

Square tool bit blanks are used in single-point turning, boring, threading, and form-tool applications on manual lathes and screw machines. The 5/16-inch cross section fits standard tool holders and lantern-style tool posts common in light to medium-duty turning operations. Machinists select cobalt blanks when cutting alloy steels, stainless steels, titanium, and other work-hardening materials that would accelerate wear on standard high-speed steel tooling.

Key Features

• M42 cobalt high-speed steel construction for improved red hardness and extended tool life in demanding cuts
• Square ground geometry on all faces for consistent stock removal when profiling to a custom edge
• 5/16 inches by 5/16 inches cross section fits standard lathe tool holders and lantern post setups
• 2.5-inch overall length provides adequate shank depth for secure clamping with sufficient grinding stock
• Single-piece packaging — sold individually, ready for immediate grinding and use

Compatibility

Designed as an OEM-style replacement or shop-stock tool bit blank for manual lathes, screw machines, and other single-point tool holders that accept a 5/16-inch square shank.

Installation Notes

Tool bit blanks require grinding to a finished cutting geometry before use; a bench or tool-and-cutter grinder with an appropriate wheel for high-speed steel is standard practice. Secure the blank firmly in the tool holder to the minimum recommended overhang before taking any cut. Always wear eye protection when grinding and dressing wheel edges. Consult your machine tool manual for proper tool height and rake angle recommendations for the workpiece material.