Cleveland C44630 M42 Cobalt Tool Bit Blank 4 in Rectangle

Product Description

The CLEVELAND C44630 is a rectangle-ground tool bit blank manufactured from M42 cobalt high-speed steel. It measures 3/8 inches wide, 5/8 inches high, and 4 inches in overall length. M42 cobalt material provides elevated hardness and heat resistance compared to standard M2 high-speed steel, making this blank well suited for machining harder workpiece materials and interrupted cuts. The ground finish ensures dimensional consistency across the blank, allowing machinists and tool grinders to profile custom cutting geometries with predictable stock removal. This blank is intended for use by machinists, toolmakers, and precision grinding shops that require a starting blank for lathe tooling, form tools, or specialty cutting applications.

This tool bit blank is appropriate for manual and CNC lathe tooling applications where a custom-ground cutting edge is required. The rectangle cross-section fits standard tool holders and rocker-style tool posts commonly found on engine lathes and turret lathes. The M42 cobalt grade is a common choice when machining stainless steel, nickel alloys, titanium, and other work-hardening materials that generate elevated cutting temperatures. Toolrooms and job shops typically keep a selection of cobalt blanks on hand for rapid tooling fabrication between setups.

Key Features

• M42 cobalt high-speed steel construction for increased hot hardness and wear resistance
• Rectangle cross-section fits standard lathe tool holders and rocker tool posts
• Ground finish provides dimensional accuracy for consistent stock removal during tool grinding
• 4 inches overall length offers sufficient material for profiling and regrinding
• Single-piece packaging for individual toolroom procurement

Compatibility

Designed as an OEM-style replacement or direct-use blank for standard rectangle tool bit holders accepting a 3/8 inches wide by 5/8 inches high cross-section in manual and CNC lathe applications.

Installation Notes

Tool bit blanks require profiling on a bench or surface grinder before use as cutting tools. Wear appropriate eye protection and use grinding wheels rated for high-speed steel when shaping the cutting geometry. Secure the blank firmly in a tool holder or grinding fixture before any machining or grinding operation. Follow shop safety procedures and applicable OSHA standards when operating grinding equipment.