Iscar 5603915 Helical Flute Thread Mill 1/4 in Internal

Product Description

The ISCAR 5603915 is a helical flute thread mill designed for cutting internal threads in a range of materials. It operates on a 1/4-inch thread size with a cutting diameter of 0.18 inches and a shank diameter of 0.25 inches. The 3-flute helical design promotes smooth chip evacuation and stable cutting action during thread milling operations. With a length of cut of 0.5 inches and an overall length of 2.5 inches, this tool fits standard CNC machining centers and milling machines. It is intended for use by machinists and tooling professionals working to UNC, UNF, or UNEF thread standards at 20 teeth per inch.

This thread mill is suited for internal thread applications in precision machining environments, including job shops, production facilities, and toolrooms. It produces 1/4-inch internal threads in a helical milling path, which reduces tool pressure compared to traditional tapping and allows a single tool to produce threads in a range of hole diameters. Compatible with standard CNC machining centers equipped with helical interpolation capability. Typical applications include threading in ferrous and non-ferrous workpiece materials where accurate thread form and finish are required.

Key Features

• 3-flute helical geometry for smooth chip flow and consistent thread form
• Cutting diameter of 0.18 inches with a 0.25-inch shank for secure toolholder engagement
• Supports UNC, UNF, and UNEF thread standards at 20 TPI
• Length of cut of 0.5 inches accommodates standard 1/4-inch thread depth requirements
• Overall length of 2.5 inches provides clearance in typical milling setups

Compatibility

Designed for use in CNC machining centers with helical interpolation capability for cutting 1/4-inch internal threads per UNC, UNF, and UNEF thread standards.

Installation Notes

Installation and use of this thread mill should be performed by qualified machinists familiar with CNC thread milling cycles and helical interpolation programming. Secure the shank firmly in a compatible collet or toolholder rated for the shank diameter before use. Verify spindle speed, feed rate, and coolant supply settings against the tool manufacturer recommendations prior to cutting. Inspect the cutting edges for wear or chipping before each use and replace the tool if damage is present.