Carmex SRC0750L18 Indexable Thread Mill 0.54in Internal External

Product Description

The CARMEX SRC0750L18 is an indexable thread mill designed for both internal and external thread milling operations. It accepts C18 and S20 inserts secured by screw-type clamping, and features a CMT toolholder style with through-coolant capability for chip evacuation and tool life in demanding cuts. The SRC0750L18 has a 0.54-inch cutting diameter, a 0.75-inch shank diameter, and an overall length of 5.5 inches, making it suitable for reaching thread depths up to 2.91 inches. Installation and operation require a compatible CNC machining center or milling machine.

This thread mill is used in precision machining environments where a single tool must produce both internal and external threads across a range of thread forms and pitches. The indexable insert design reduces tooling cost compared to solid thread mills by allowing insert replacement rather than full-tool replacement. Typical applications include production threading on ferrous and non-ferrous workpieces in job shop, aerospace, oil and gas, and general manufacturing settings. A licensed machinist or CNC operator performs the setup and run.

Key Features

• Handles both internal and external thread milling with a single tool body
• Compatible with C18 and S20 insert styles for flexibility across thread forms
• Through-coolant design directs fluid to the cutting edge for improved chip clearance and tool life
• Screw-type insert holding method for secure, repeatable insert indexing
• 0.54-inch neck diameter matches cutting diameter for clearance in deep-hole applications
• CMT toolholder style for precise runout control

Compatibility

Compatible with C18 and S20 indexable inserts. Designed for use in CNC milling machines and machining centers accepting a 0.75-inch straight shank toolholder. Verify insert style and thread form requirements before ordering replacement inserts.

Installation Notes

This tool is installed and operated by a qualified CNC machinist or toolroom professional. Ensure the spindle and coolant supply are fully de-energized and locked out before changing inserts or mounting the tool in the holder. Use the appropriate Torx or hex key as specified by the insert screw to seat inserts firmly without overtorquing. Confirm tool reach, shank retention, and coolant-through compatibility with the machine spindle before running the first pass.