Cleveland C44660 M42 Cobalt Tool Bit Blank 6 Inch Rectangle

Product Description

The CLEVELAND C44660 is a rectangle ground tool bit blank manufactured from M42 cobalt high-speed steel. It measures 3/4 inch wide, 1 inch high, and 6 inches in overall length. M42 cobalt HSS offers higher red hardness and wear resistance compared to standard M2 grades, making this blank suitable for machining tough, abrasive, or heat-resistant alloys. The blank arrives ground and ready for the toolmaker or machinist to profile and sharpen to the required cutting geometry. It is used in production toolrooms, job shops, and maintenance departments where custom single-point lathe tools, form tools, or specialty cutters are ground in-house.

This tool bit blank is suited for applications involving hard-to-machine materials such as stainless steels, titanium alloys, and nickel-based superalloys where standard HSS grades lose hardness at elevated cutting temperatures. The 6-inch length provides sufficient stock for grinding multiple profiles or for use in boring bars and toolholders that accept 3/4-inch blanks. It is a standard choice for manual and CNC lathe tool grinding operations in both light manufacturing and heavy-duty production environments.

Key Features

• M42 cobalt HSS construction provides superior red hardness for cutting difficult alloys
• Rectangle ground profile allows precise in-house tool geometry grinding
• 3/4 inch width by 1 inch height cross-section fits standard toolholders and grinding fixtures
• 6-inch overall length offers generous stock for multiple regrinds
• Ground finish ensures dimensional accuracy and consistent seating in toolholders

Compatibility

Designed as an OEM-style replacement or shop-ground tool blank for lathes and boring applications requiring a 3/4 inch by 1 inch rectangular HSS bit blank up to 6 inches in overall length.

Installation Notes

Tool bit blanks are ground by a qualified toolmaker or machinist using a bench or surface grinder fitted with an appropriate grinding wheel for high-speed steel. Secure the blank in a proper tool grinding fixture to maintain accurate rake and relief angles. Always wear eye protection and follow shop safety procedures when grinding. Verify the finished tool geometry and edge condition before mounting in the toolholder and bringing the machine to operating speed.