Helical Solutions 87643 Corner Rounding End Mill 3 Flute Carbide

Product Description

The HELICAL SOLUTIONS 87643 is a solid carbide corner rounding end mill designed to produce precise convex radius profiles on machined workpieces. Built with a 0.187-inch radius and a 0.625-inch mill diameter, this single-end tool cuts a 0.240-inch tip diameter and runs a right-hand helical flute geometry for smooth chip evacuation. The Zplus coating improves wear resistance and heat dissipation during high-speed cutting operations. This tool is intended for use by machinists and CNC operators working in job shops, production facilities, and toolrooms where consistent edge-breaking and radius profiling are required.

The 87643 fits standard CNC machining centers and manual mills with a 5/8-inch cylindrical shank holder. At 3.0 inches overall length with a 5/8-inch shank diameter, it suits a wide range of setups without excessive overhang. The three-flute helical design balances material removal rate against surface finish quality, making it well suited for profiling aluminum, steel, stainless, and similar machinable alloys. It is sold as a single-end tool, so orientation is fixed and there is no reversing the cutting end.

Key Features

• 0.187-inch corner radius produces a clean 3/16-inch convex profile in a single pass
• Solid carbide construction provides rigidity and wear life superior to high-speed steel alternatives
• Zplus coating reduces friction and extends tool life in ferrous and non-ferrous materials
• Right-hand helical flutes promote upward chip flow and reduce heat buildup at the cutting edge
• 5/8-inch cylindrical shank fits standard collet chucks and end mill holders without adapters
• 3.0-inch overall length gives adequate reach while maintaining tool stiffness

Compatibility

Designed for use in CNC machining centers and manual milling machines equipped with a 5/8-inch collet or end mill holder. Part of the Helical Solutions Specialty Profiles Corner Rounding End Mills Helical Flute 3 and 5 Flute High Performance series.

Installation Notes

Installation is performed by a qualified machinist or CNC operator. Secure the 5/8-inch cylindrical shank in a properly sized collet or end mill holder and torque the retention mechanism per the toolholder manufacturer specification. Inspect the cutting edges and coating for chips or damage before mounting. Verify spindle direction is set to right-hand rotation before engaging the cut, and confirm all axis movements are clear of fixturing before starting the program.