Carmex S0250C2048UN Thread Mill 3 4 Internal 3 Flute

Product Description

The CARMEX S0250C2048UN is a solid carbide helical flute thread mill designed for internal thread milling of number 3 and number 4 UNC and UNF threads. It features a 0.075 inch cutting diameter, a 0.25 inch shank diameter, and a 0.2 inch length of cut, making it a mini thread mill suited for small-diameter internal threading operations. The TiAlN coating provides thermal resistance during high-speed cutting. With 3 flutes and 48 teeth per inch, it produces accurate thread profiles in a single helical pass. Licensed machinists and CNC programmers install this tool in vertical or horizontal machining centers.

This thread mill is used in precision machining environments where small internal threads must be cut in hard or abrasive materials. It is appropriate for production and job-shop settings machining components that require number 3 or number 4 UNC or UNF internal threads. The left-hand and right-hand flute direction compatibility and mini thread mill classification make it suitable for tight-clearance bore applications in both prototype and production runs. Material grade MT7 supports use in a range of workpiece materials common to general and precision machining.

Key Features

• Solid carbide construction with TiAlN coating for wear and heat resistance
• Cuts number 3 and number 4 UNC and UNF internal threads at 48 TPI
• Mini thread mill classification for small-diameter and tight-clearance bores
• 3-flute design supports chip evacuation in confined internal features
• Compatible with left-hand and right-hand helical flute directions
• No coolant-through requirement simplifies toolholder setup

Compatibility

Designed for internal thread milling of number 3 and number 4 UNC and UNF threads in CNC machining center applications. Confirmed thread standards from input data are UNC and UNF.

Installation Notes

Installation is performed by a qualified CNC machinist or tooling technician. The machine spindle must be stopped and the tool changer in a safe state before loading or unloading the tool. Verify runout with a dial indicator after seating in the collet or toolholder before running a program. Follow the tool manufacturer and machine builder guidelines for feed rate and spindle speed based on workpiece material and thread size.