Promax 109-01646 Square End Mill 1/4 in 3-flute Solid Carbide Zrn

Product Description

The PROMAX 109-01646 is a solid carbide square end mill designed for precision milling in metalworking and machining applications. With a 0.25 inch cutting diameter, a 1.5 inch length of cut, and a 3.5 inch overall length, this tool delivers rigid performance in a compact profile. The 40-degree helix angle promotes efficient chip evacuation and reduces cutting forces. A zirconium nitride (ZrN) finish increases surface hardness and wear resistance, extending tool life in demanding cuts. This end mill is part of PROMAX Series 109 and is suited for use by machinists and tooling professionals working in job shops, production facilities, and maintenance environments.

This end mill is intended for milling ferrous and non-ferrous materials where a right-hand cut, right-hand spiral flute configuration is required. The centercutting geometry allows plunge milling in addition to peripheral and slot cutting. With a micrograin carbide substrate, it handles applications requiring tight dimensional tolerances and consistent finish quality. Typical use cases include slot milling, profiling, and shoulder milling on CNC machining centers and manual mills. The 0.25 inch shank diameter fits standard ER and end mill collet holders commonly found in both vertical and horizontal machining setups.

Key Features

• Solid micrograin carbide construction for high rigidity and wear resistance
• ZrN coating increases hardness and extends tool life in abrasive materials
• 40-degree helix angle promotes smooth chip flow and reduces cutting heat
• Centercutting design enables direct plunge entry without pre-drilling
• 3-flute spiral geometry balances chip clearance and cutting edge strength
• Right-hand cut and right-hand flute configuration compatible with standard spindle rotation

Compatibility

Designed as an OEM-style replacement or direct tooling selection for CNC machining centers and manual mills using 0.25 inch collet or end mill holders. Part of PROMAX Series 109.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the spindle is fully stopped and locked out before changing tooling. Seat the shank fully into the collet or tool holder and torque the retention nut to the tool holder specification. Verify runout with a dial indicator before beginning cuts, as excessive runout accelerates edge wear and reduces dimensional accuracy.