Carmex S0250C791.0ISO Thread Mill Internal M6 X 1.00 Carbide

Product Description

The CARMEX S0250C791.0ISO is a solid carbide helical flute thread mill designed for cutting internal metric coarse threads in demanding machining applications. Built to the Mini thread mill type classification, it features three flutes and a TiAlN coating that extends tool life under high-heat cutting conditions. The shank diameter is 0.25 inches, the cutting diameter is 0.183 inches, and the overall length is 2.5 inches. The tool is rated to Material Grade MT7, making it suitable for use in hardened steels, stainless steels, and other difficult-to-machine materials. Installation is performed by qualified machinists in CNC milling environments.

This thread mill is intended for internal thread milling of M6 x 1.00 metric coarse threads, with a minimum nominal diameter rating of M6 and M8. The helical flute geometry supports both left-hand and right-hand flute direction use, giving machinists flexibility in programming approach. Typical applications include threading operations in aerospace, automotive, mold-and-die, and precision job shop environments where tap breakage risk must be minimized and thread quality must be consistent across harder workpiece materials.

Key Features

• Solid carbide construction rated to Material Grade MT7 for machining hardened and abrasion-resistant workpieces
• TiAlN coating provides heat and wear resistance during high-speed internal threading
• Three-flute helical design supports efficient chip evacuation in blind and through-hole applications
• Compatible with both left-hand and right-hand flute direction programming
• Mini thread mill type profile allows access to small-diameter internal threads starting at M6
• No coolant-through design - suitable for external flood or mist coolant delivery setups

Compatibility

Designed for M6 x 1.00 metric coarse internal thread milling with a minimum nominal diameter of M6 and M8, as specified by the manufacturer for this tool geometry and grade.

Installation Notes

This tool is installed and operated by qualified machinists using CNC milling machines programmed for helical interpolation thread milling cycles. The machine spindle and tool holder must be verified for runout before use, as excessive runout will degrade thread quality and shorten tool life. Ensure the workpiece is fully secured and the machine program uses the correct pitch, lead, and diameter offset values for M6 x 1.00 metric coarse thread specifications. Do not use this tool in hand-held or non-CNC operations.