Value Collection 723-3658 Square End Mill 3/16 in 3 Flute Cobalt

Product Description

The VALUE COLLECTION 723-3658 is a cobalt square end mill designed for milling operations that demand heat resistance and edge retention beyond what standard high-speed steel tooling can provide. Built from M42 cobalt steel, this single-end stub-length tool features a 3/16 inch cutting diameter, a 9/32 inch length of cut, and a 30-degree right-hand spiral helix. The bright/uncoated finish keeps tool preparation straightforward. With three flutes and a right-hand cutting direction, it is suited for slotting, profiling, and peripheral milling in ferrous and harder workpiece materials. Machinists and tool-and-die professionals working on manual mills or CNC machining centers will recognize this as a standard fractional-inch stub end mill.

This end mill is intended for use in metalworking applications where a compact stub-length profile provides added rigidity in tight setups or shallow-depth work. The 1/4 inch shank diameter fits standard ER collets, end mill holders, and Weldon-style holders common on knee mills and VMCs. The cobalt M42 substrate makes this tool a practical choice for cutting alloy steels, stainless steels, cast iron, and similar materials where carbide is not required. It is a single-end tool, so once the cutting end is worn, the tool is replaced rather than reversed.

Key Features

• M42 cobalt steel construction for improved heat and wear resistance over standard HSS
• 3/16 inch cutting diameter with 9/32 inch length of cut in a rigid stub-length body
• 3 flutes with right-hand spiral at 30-degree helix angle for efficient chip evacuation
• Center-cutting geometry allows direct plunge entry into the workpiece
• 1/4 inch shank diameter fits standard collet and end mill holder tooling
• Bright/uncoated finish, Series VCCC-C-3, fractional-inch sizing

Compatibility

Designed as a standard fractional-inch stub-length square end mill compatible with any machine spindle tooling that accepts a 1/4 inch shank, including ER collet chucks, end mill holders, and Weldon-style holders used on manual knee mills and CNC vertical machining centers.

Installation Notes

Installation is performed by a machinist or toolroom technician. Ensure the machine spindle is fully stopped and the tool holder is clean and free of debris before seating the shank. Torque the collet nut or set screw according to the toolholder manufacturer specifications, not a generic value. Verify runout at the cutting diameter before beginning the operation, as excessive runout accelerates wear and reduces surface finish quality on cobalt tooling.