Kyocera THC89161 Indexable Turning Toolholder Mcln

Product Description

The KYOCERA THC89161 is an indexable turning toolholder in the MCLN series, designed for external turning and facing operations on CNC lathes and manual turning centers. It uses a clamp-and-pin holding method to secure negative-rake CN-style inserts, providing rigid clamping and repeatable edge positioning. The shank measures 1 inch wide by 1 inch tall, with an overall length of 6 inches. The head length is 1.26 inches and the back-of-bar to cutting edge dimension is 1.25 inches. The body is machined from steel and configured for right-hand cutting direction. Licensed machinists and CNC setup techs are the primary installers.

This toolholder is suited for facing applications in production turning environments. The MCLN geometry positions the insert at a 0-degree rake angle, making it appropriate for interrupted cuts and hard materials where a negative rake provides edge strength. At 1.5 pounds, it fits standard tool blocks and turret stations sized for 1-inch square shank tooling. It is marked as a multi-use tool, meaning it supports a range of CN-series insert grades and chipbreaker styles within the compatible size range, giving shops flexibility across different workpiece materials.

Key Features

• Clamp-and-pin insert holding method for secure, repeatable seating
• Negative rake geometry with 0-degree rake angle for edge strength on demanding cuts
• 1 inch x 1 inch square shank fits standard turret and tool block stations
• Compatible with multiple CN-type insert styles including CNGA43, CNGG43, CNMA43, CNMG43, and CNMM43
• Right-hand cutting direction for standard OD turning and facing passes
• Steel construction for rigidity and durability under heavy cutting loads

Compatibility

Compatible inserts include CNGA43, CNGG43, CNMA43, CNMG43, and CNMM43 series with a 0.5-inch inscribed circle and 0.1875-inch thickness. Designed for use in any turning center or CNC lathe equipped with a 1-inch square shank tool station.

Installation Notes

Installation is performed by qualified machinists or CNC tooling setup personnel. Power down and lock out the machine spindle before changing or indexing inserts. Ensure the tool block or turret pocket is clean and free of chips before seating the shank. Follow the machine tool manufacturer's torque specifications for clamping screws, and verify tool nose radius and offset in the control after any insert change.