Iscar 3398986 Square End Mill 1/4in 3 Flute Solid Carbide

Product Description

The ISCAR 3398986 is a solid carbide square end mill designed for precision milling operations in ferrous and non-ferrous materials. It features a 1/4 inch cutting diameter, a 3/8 inch length of cut, and a 2 inch overall length with a matching 1/4 inch shank diameter. The 3-flute geometry combined with a 45-degree helix angle promotes efficient chip evacuation and reduces cutting forces. A DLC (Diamond-Like Carbon) coating provides enhanced surface hardness and lubricity, extending tool life in demanding applications. The submicron carbide grade supports tight tolerances and consistent performance. This end mill is a single-end, centercutting tool intended for use by machinists and CNC operators in production and job shop environments.

This end mill is suited for slot milling, profiling, and finishing passes on a variety of workpiece materials. The right-hand cut and right-hand flute direction make it compatible with standard CNC machining centers and manual vertical mills. The variable index design reduces harmonic vibration during cutting, which is particularly valuable in thin-wall and high-precision workpiece applications. It is appropriate for both light finishing and moderate material removal in shop environments requiring close dimensional control.

Key Features

• 1/4 inch cutting diameter with 3/8 inch length of cut for short-reach precision work
• 3-flute geometry with 45-degree helix angle for efficient chip flow and reduced cutting force
• DLC coating for improved hardness, lubricity, and extended tool life
• Centercutting design allows plunge entry into workpiece material
• Variable index flute spacing reduces chatter and vibration during operation
• Submicron solid carbide grade for dimensional stability and edge retention

Compatibility

Designed as an OEM-style replacement and standard tooling option for CNC machining centers and vertical mills accepting 1/4 inch straight shank end mills.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Secure the shank fully into a collet or end mill holder to the recommended grip depth before tightening. Confirm spindle runout is within acceptable tolerance before engaging the cut. Do not exceed the tool manufacturer's recommended speeds and feeds for the specific workpiece material and coating type.