Value Collection 460-6090 M42 Cobalt Tool Bit Blank

Product Description

The VALUE COLLECTION 460-6090 is a square tool bit blank ground from M42 high-cobalt steel, intended as raw stock for machinists and toolmakers who grind custom cutting profiles. It measures 7/16 inches wide by 7/16 inches high with a 3.5-inch overall length, providing a solid cross-section with enough stock to regrind multiple times over its service life. M42 cobalt high-speed steel offers increased heat and wear resistance compared to standard M2 HSS, making it well-suited for harder workpiece materials and heavier interrupted cuts. Weighing 0.18 pounds, the blank is compact and easy to handle at the bench grinder or surface grinder.

Square tool bit blanks like the 460-6090 are used in manual and CNC lathe operations, boring bars, and custom toolholder setups where a specific cutting geometry must be hand-ground. This blank is appropriate for production shops, tool rooms, and maintenance environments where machinists need to fabricate single-point turning tools, parting tools, threading tools, or other profiles ground to match a specific operation. It is a standard shop consumable stocked by tool cribs and purchased individually or in small quantities for on-demand toolmaking.

Key Features

• M42 cobalt high-speed steel construction for improved hot hardness and wear resistance
• Square cross-section at 7/16 inches x 7/16 inches fits standard tool bit holders and grinding fixtures
• 3.5-inch overall length provides ample stock for initial grinding and multiple regrinds
• Unground blank format allows machinists to establish any custom cutting geometry
• Minimum order quantity of 1 for flexible bench-stock purchasing

Compatibility

Designed as a standard square tool bit blank for use in tool bit holders accepting 7/16-inch cross-section stock, commonly found on manual engine lathes and toolroom machines.

Installation Notes

Tool bit blanks are ground to shape by a qualified machinist using a bench grinder or surface grinder equipped with an appropriate wheel for high-speed steel. Ensure the grinder is in good working order and that proper eye protection and rest clearances are observed before grinding. The finished tool bit should be inspected for correct relief and rake angles before use in a toolholder. Secure the toolholder rigidly in the machine tool before initiating any cut.