Helical Solutions 87641 Corner Rounding End Mill 3 Flute

Product Description

The HELICAL SOLUTIONS 87641 is a solid carbide corner rounding end mill designed to produce consistent radius profiles on workpiece edges in precision machining applications. With a 1/8-inch (0.1250-inch decimal) corner radius and a 7/16-inch mill diameter, this tool generates smooth, uniform edge breaks without secondary deburring operations. The Zplus coating provides enhanced surface hardness and heat resistance, extending tool life in demanding cutting conditions. Three helical flutes in a right-hand cut configuration promote efficient chip evacuation and stable cutting action. This single-end tool is used by machinists and tool-and-die professionals in CNC milling operations across job shops, aerospace, and general manufacturing environments.

The 87641 is suited for corner rounding operations on ferrous and non-ferrous materials where a controlled 1/8-inch radius edge profile is required. The cylindrical shank diameter of 7/16 inches matches the mill diameter, allowing straightforward collet or end mill holder retention on standard CNC machining centers and manual knee mills. With an overall length of 2.75 inches, the tool fits standard reach requirements for most open-setup milling operations. It is a single-end design, meaning the tool is replaced rather than flipped when the cutting end is worn.

Key Features

• 1/8-inch corner radius for consistent, repeatable edge profiling
• Solid carbide construction for rigidity and wear resistance
• Zplus coating enhances hardness and thermal resistance at the cutting edge
• Three helical flutes promote smooth chip flow and stable cutting forces
• Right-hand flute direction compatible with standard CNC spindle rotation
• Cylindrical shank seats securely in collet chucks and end mill holders

Compatibility

Designed as an OEM-style replacement corner rounding end mill for use in standard 7/16-inch collet or end mill holder setups on CNC machining centers and manual milling machines.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer's setup procedures. Ensure the spindle is fully stopped and locked out before inserting or removing the tool from the holder. Seat the shank fully into the collet or holder to the recommended engagement depth and torque the retention mechanism per the tool holder manufacturer's specification. Inspect the cutting edges for chips or coating damage before each use.