Value Collection 460-10394 M42 Cobalt Tool Bit Blank 1/4x6in

Product Description

The VALUE COLLECTION 460-10394 is a square tool bit blank ground from M42 cobalt high-speed steel, intended for machinists and tool grinders who need to profile custom cutting tools. Measuring 0.25 inches wide by 0.25 inches high with a 6-inch overall length, this blank provides ample stock for grinding lathe tools, boring bars, and specialty cutters. M42 cobalt alloy delivers higher red hardness than standard M2 HSS, making it well suited for interrupted cuts and harder workpiece materials. The square cross-section allows consistent regrinding on all four sides.

This tool bit blank is used in machine shops, toolrooms, and maintenance departments where operators grind their own single-point cutting tools to custom geometries. It is appropriate for use in engine lathes, turret lathes, and similar metal-cutting setups where a brazed or custom HSS tool is preferred over an indexable insert. Typical users include machinists, tool and die makers, and industrial maintenance technicians working with ferrous and non-ferrous materials.

Key Features

• M42 cobalt HSS construction for improved red hardness and wear resistance over standard M2 grade
• Square cross-section allows regrinding on all four sides to extend service life
• 0.25 inch x 0.25 inch profile fits standard tool holders and grinder fixtures for that size range
• 6-inch overall length provides substantial stock for multiple grinds or extended tool profiles
• Unground blank format allows full custom geometry to be applied by the end user

Compatibility

Designed as a standard square tool bit blank for use in tool holders and grinder setups that accept 1/4-inch square HSS blanks across a range of manual and semi-automatic lathes.

Installation Notes

Grinding of tool bit blanks should be performed by a qualified machinist or tool grinder using appropriate bench or pedestal grinders fitted with aluminum oxide or CBN wheels rated for HSS. Eye protection and proper wheel guards are required during all grinding operations. Secure the blank firmly in a tool grinding fixture or vise to maintain consistent relief and rake angles. Allow the blank to cool during grinding to avoid drawing the temper of the cobalt steel.