Cleveland C44617 M42 Cobalt Tool Bit Blank 3 Inches

Product Description

The CLEVELAND C44617 is a rectangle-ground tool bit blank machined from M42 cobalt high-speed steel. It measures 5/16 inches wide, 1/2 inches high, and 3 inches in overall length. Designed as a raw blank, it is intended for machinists and tool grinders who require a starting workpiece to profile, grind, and finish to a specific cutting geometry. M42 cobalt steel offers elevated heat resistance and hardness retention compared to standard M2 HSS, making it well suited for demanding cutting applications on harder workpiece materials. This blank ships ground to consistent dimensions for predictable stock removal during tool grinding.

Tool bit blanks like the C44617 are used in manual and CNC lathe operations, screw machines, and custom tooling setups where standard insert tooling is not practical. Machinists in job shops, tool rooms, and production environments select this blank when a specific nose radius, relief angle, or profile is needed that off-the-shelf tooling cannot provide. The ground finish reduces the amount of material a tool grinder must remove before the blank reaches usable geometry.

Key Features

• M42 cobalt HSS material grade for improved hardness and heat resistance over standard HSS
• Ground finish on all faces for consistent dimensional accuracy out of the box
• Rectangle profile allows versatile custom grinding to a wide range of cutting geometries
• 3 inches overall length provides sufficient stock for multiple regrinds over the tool life
• Single-piece packaging suitable for individual tool room or bench use

Compatibility

Designed as a standard-dimension rectangle tool bit blank compatible with tool holders and grinder fixtures that accept 5/16 inches wide by 1/2 inches high HSS blank stock.

Installation Notes

Grinding and profiling of tool bit blanks should be performed by a qualified machinist or tool grinder using appropriate wheel grades for cobalt HSS. Eye protection and proper ventilation are required during grinding operations. Secure the blank firmly in a tool grinder fixture before contact with the wheel to prevent kickback. Allow the blank to cool adequately between grinding passes to avoid thermal damage to the cutting edge being formed.