Value Collection 723-8691 Square End Mill 18mm 4 Flute Cobalt

Product Description

The VALUE COLLECTION 723-8691 is a cobalt square end mill designed for milling ferrous and abrasive materials where high-speed steel falls short. Built from M42 cobalt steel, this single-end tool runs a 4-flute, right-hand spiral configuration with a 30-degree helix angle, making it well-suited for finishing passes and moderate slotting operations. The cutter measures 18 mm (0.7087 inches) in diameter with a 1-5/8 inch length of cut and a 3-3/4 inch overall length. It ships bright and uncoated, ready for use in conventional cutting applications. Machinists and tool-and-die professionals typically reach for this geometry when working stainless, alloy steel, or hardened materials that demand a tougher substrate than standard HSS.

This end mill fits standard milling machine spindles and CNC machining centers accepting a 5/8 inch straight shank. Its regular-length profile suits most knee mills, vertical machining centers, and manual milling setups where clearance is not a limiting factor. The center-cutting design allows plunge entry, adding versatility for pocketing operations. The right-hand cutting direction is compatible with conventional climb-milling setups on typical shop equipment.

Key Features

• M42 cobalt steel construction for improved heat and wear resistance over standard HSS
• 4-flute, right-hand spiral geometry with 30-degree helix angle for efficient chip evacuation
• Center-cutting capable — supports direct plunge entry without pre-drilling
• Bright/uncoated finish — suitable for use with cutting fluids or dry cutting where coatings are not required
• Single-end design with 5/8 inch shank for secure clamping in collets or end mill holders
• Regular length profile reduces deflection risk in standard-depth applications

Compatibility

Designed as an OEM-style replacement or standard tooling selection for milling machines and CNC machining centers equipped with a 5/8 inch collet, end mill holder, or comparable toolholding system accepting straight-shank cutters.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Power down and lock out the spindle drive before seating or removing the tool from the holder. Ensure the shank is fully seated and the collet or set-screw holder is torqued to the machine manufacturer specification before cutting. Inspect the cutting edges and shank for damage before each use; a chipped or worn cutter can pull from the holder or cause workpiece damage.