Value Collection 33039 T-slot Cutter 21/32 in Cobalt M42

Product Description

The VALUE COLLECTION 33039 is a cobalt M42 T-slot cutter designed for machining T-slots in ferrous and non-ferrous workpieces on milling machines and machining centers. The cutter measures 21/32 inches in diameter with a 17/64-inch cutting width, making it sized for standard 5/16-inch bolt T-slots. The 1/2-inch shank diameter fits common milling machine collets and arbors. With 8 straight teeth and a bright uncoated finish, this cutter is suited for general-purpose T-slot milling where high-speed steel performance is required but cobalt-grade heat resistance is preferred. Machinists and tool-and-die professionals are the primary users.

This T-slot cutter is used in manual mills, knee mills, and CNC machining centers for cutting T-slots in machine tables, fixtures, and workholding components. The 39/64-inch neck length provides clearance for the slot walls during the cut, and the 2-11/16-inch overall length accommodates standard tool holders. The M42 cobalt steel construction handles the elevated cutting temperatures common in interrupted cuts and harder steels. This style of cutter is a standard tool in job shops, maintenance facilities, and production machine shops.

Key Features

• M42 cobalt steel construction for improved heat and wear resistance over standard HSS
• 21/32-inch cutter diameter sized for 5/16-inch bolt T-slots
• 17/64-inch cutting width for accurate slot dimension
• 8 straight teeth for clean, consistent chip load per pass
• Bright uncoated finish — suitable for use with cutting fluids on a wide range of materials
• 39/64-inch neck length provides clearance in deep or narrow slot entries

Compatibility

Designed as a standard T-slot cutter for use in milling machines and machining centers accepting a 1/2-inch shank, suitable for cutting 5/16-inch bolt T-slots in workholding fixtures, machine tables, and similar components.

Installation Notes

Installation is performed by qualified machinists. Secure the 1/2-inch shank in a collet or arbor rated for the shank diameter and confirm runout before cutting. Power down and lock out the machine spindle before loading or removing the cutter. Use appropriate cutting fluid for the workpiece material to manage heat buildup during the T-slot pass.