Cleveland C44638 M42 Cobalt Tool Bit Blank 4 Inches

Product Description

The CLEVELAND C44638 is a rectangle-ground tool bit blank manufactured from M42 cobalt high-speed steel. It is designed for use in custom tooling applications where machinists grind the cutting geometry to suit a specific operation. The blank measures 3/8 inches wide, 3/4 inches high, and 4 inches in overall length. M42 cobalt material grade provides elevated heat resistance and hardness retention compared to standard M2 high-speed steel, making it suitable for harder workpiece materials and higher cutting speeds. The ground finish ensures consistent dimensional accuracy across the blank profile, reducing setup time when forming a custom tool profile.

This tool bit blank is used in manual and CNC metalworking environments where shop-ground lathe tools, boring bars, or form tools are required. It is a common choice for job shops, toolrooms, and maintenance machining operations. Machinists select blanks of this type when standard insert tooling does not fit the geometry or clearance requirements of a specific turning, facing, or threading operation. The rectangle cross-section suits standard tool holders and tool posts sized for 3/8 inches x 3/4 inches shank stock.

Key Features

• M42 cobalt high-speed steel construction for improved wear resistance and hot hardness
• Ground finish provides precise dimensional control across width, height, and length
• Rectangle cross-section fits standard tool posts and holders sized for this shank profile
• 4 inches overall length provides sufficient stock for grinding multiple tool profiles over the blank's service life
• Single-piece packaging suited for individual toolroom or job shop procurement

Compatibility

Designed as a general-purpose tool bit blank for use in standard tool holders and tool posts that accept 3/8 inches x 3/4 inches rectangular shank stock. Confirm holder geometry before ordering.

Installation Notes

Tool bit blanks are ground to final geometry by a qualified machinist using a bench or pedestal grinder fitted with an appropriate grinding wheel for high-speed steel. Proper eye protection and work-rest adjustment are required during grinding operations. Ensure the tool holder or tool post is securely clamped and the machine spindle is fully stopped before seating or adjusting the ground tool. Follow shop safety standards and applicable OSHA guidelines for grinding and turning operations.