Carmex SR1180J21-2 Indexable Thread Mill 1.18 in

Product Description

The CARMEX SR1180J21-2 is an indexable thread mill designed for precision internal threading operations in milling applications. It features a 1.18-inch cutting diameter and accommodates a maximum hole depth of 1.97 inches, making it well suited for through and blind-hole threading tasks. The toolholder body is machined from alloy steel for rigidity under cutting loads. It accepts two I/E-style inserts secured by screw-type clamping, and through-coolant capability is built in to support chip evacuation and thermal management at the cutting zone. Licensed machinists and CNC programmers working in job shop or production environments will find this tool consistent with standard indexable tooling workflows.

This thread mill is intended for use in milling machine spindles and CNC machining centers where indexable tooling with through-coolant is required. The 1-inch shank diameter fits standard ER or side-lock toolholders commonly found in vertical and horizontal machining centers. With a neck diameter of 0.95 inches and an overall length of 4.25 inches, the tool provides adequate clearance and reach for most threading applications encountered in general metalworking and precision machining environments.

Key Features

• 1.18-inch cutting diameter for threading operations in matching bore sizes
• Maximum hole depth of 1.97 inches accommodates common thread lengths
• Accepts two I/E-style inserts (size 21 mm) with screw-type insert holding
• Through-coolant design aids chip flushing and extends insert life
• Alloy steel toolholder body provides stability and resistance to deflection
• 1-inch shank diameter for compatibility with standard CNC toolholding systems

Compatibility

Designed for use with I/E-style threading inserts in 21 mm insert size. Compatible insert screw is S21; key designation is K21. Intended for SR-style toolholder configurations as specified by the manufacturer.

Installation Notes

Installation and setup should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the control is in a safe state before loading or changing inserts. Use the correct torque driver for the insert screw (S21) per insert manufacturer guidelines; do not overtighten. Confirm through-coolant passages are clear and that the toolholder is properly seated and torqued in the spindle before running the program.