Harvey Tool 900816 Square End Mill 0.25in 3 Flute Carbide

Product Description

The HARVEY TOOL 900816 is a solid carbide square end mill designed for precision milling in metal, composites, and engineering plastics. The cutter measures 0.25 inches in diameter with a 2-inch length of cut, a 0.25-inch shank diameter, and a 4-inch overall length. Three flutes with a 40-degree helix angle and an upcut geometry promote chip evacuation and reduce heat buildup during aggressive material removal. The bright, uncoated finish makes this tool well-suited for applications where coating-related thermal concerns or material adhesion could be a factor. Machinists and CNC operators working in job shops, tool rooms, and production environments are the primary users of this tool.

This end mill is configured as a single-end, right-hand cut tool with right-hand fluting and is intended for general-purpose slotting, profiling, and pocketing operations. The 40-degree helix provides a good balance between cutting efficiency and tool rigidity for a 0.25-inch diameter cutter. It is commonly used on CNC vertical machining centers and manual knee mills where a small-diameter, long-reach carbide end mill is required. The 2-inch length of cut allows access to deeper features without requiring a longer reach extension or specialty toolholder.

Key Features

• 0.25-inch cutter diameter with 2-inch length of cut for deep-feature access
• Solid carbide construction for rigidity and wear resistance
• 3-flute geometry supports efficient chip evacuation in slotting and pocketing
• 40-degree helix angle balances cutting forces and surface finish quality
• Upcut right-hand flute design for standard CNC milling operations
• Bright uncoated finish suitable for non-ferrous metals and plastics where coating is not preferred

Compatibility

Designed as a standard 0.25-inch shank solid carbide square end mill compatible with ER collets, end mill holders, and other toolholding systems accepting a 0.25-inch shank diameter.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle is fully stopped and the control is in an e-stop or tool-change state before installing or removing end mills. Verify collet or holder bore size matches the 0.25-inch shank before tightening. Follow the toolholder manufacturer torque guidelines and confirm runout with a dial indicator before beginning a production cut.