Carmex S0250C220.45ISO Thread Mill M2.5x0.45 Solid Carbide

Product Description

The CARMEX S0250C220.45ISO is a solid carbide helical flute thread mill designed for cutting internal metric coarse threads in precision machining applications. Built to the M2.5 x 0.45 ISO metric standard, this mini thread mill features a 0.077-inch cutting diameter and a 3-flute geometry that supports efficient chip evacuation in tight bores. The TiAlN coating extends tool life in harder workpiece materials by improving thermal resistance at the cutting edge. With an overall length of 2.5 inches and a 0.25-inch shank diameter, the tool is sized for use in CNC machining centers where small-diameter internal threading is required.

This thread mill is suited for machining small metric internal threads in ferrous and non-ferrous materials across aerospace, medical device, and general precision manufacturing environments. The mini thread mill form factor makes it appropriate for confined bore geometries where standard-length tooling will not fit. Material grade MT7 solid carbide provides the rigidity needed for accurate thread form at this scale. Both left-hand and right-hand flute direction capability is supported, allowing flexibility in climb and conventional milling strategies depending on machine setup and material requirements.

Key Features

• M2.5 x 0.45 metric coarse internal thread profile per ISO standard
• Solid carbide construction, material grade MT7, for rigidity and dimensional stability
• TiAlN coating for improved heat resistance and extended tool life in harder materials
• 3-flute helical geometry promotes chip flow in small-diameter blind and through bores
• Mini thread mill classification suits confined bore and small-diameter threading operations
• Left-hand and right-hand flute direction compatible for flexible CNC programming strategies

Compatibility

Designed as an OEM-style thread mill for CNC machining centers capable of helical interpolation and accepting a 0.25-inch straight shank; intended for cutting M2.5 x 0.45 ISO metric coarse internal threads.

Installation Notes

Thread milling with this tool requires a CNC machining center with helical interpolation capability. Secure the 0.25-inch shank in a collet or end mill holder rated for the shank diameter before operation. Verify spindle speed, feed rate, and helical pitch programmed in the CAM or G-code routine match the M2.5 x 0.45 thread specification before the first cut. This tool does not support coolant-through delivery; external or flood coolant should be directed at the cutting zone to manage chip evacuation and heat in the bore.