MCMNN Turning Tool Holder | Neutral 50° M-Type Holder for CNMG, CNMA & CNMM Inserts

High-Versatility MCMNN Neutral Tool Holder for Complex Machining

The MCMNN tool holder stands out among various CNC turning tool holder types due to its neutral orientation and 50-degree approach angle. This specialized design allows machinists to perform longitudinal turning and profiling in both directions, reducing the need for frequent tool changes. As a professional-grade lathe turning tool holder, the MCMNN is the go-to solution for optimizing cycle times in complex workpiece geometries.

Optimized for CN-Series Inserts (CNMG, CNMA, CNMM)

One of the core advantages of the MCMNN series is its wide compatibility across the CN-style insert family. While it is most commonly used as a CNMG tool holder, its precision-machined pocket accommodates other variations to suit specific material requirements:

• CNMG: The ideal choice for general-purpose steel and stainless steel turning.

• CNMA: Preferred for machining cast iron (ISO K) due to its flat-top design.

• CNMM: Designed with a reinforced cutting edge for heavy-duty roughing and interrupted cuts.

Unmatched Stability with the M-Type Clamping System

To handle the cutting forces generated during multi-directional turning, the MCMNN utilizes an M-type double-clamping mechanism. By securing the lathe insert holder via both a top clamp and a center pin, it eliminates insert movement. This rigid setup is essential for maintaining tight tolerances and achieving a superior surface finish, even when high feed rates are applied.

Specifications Table

Q: What is the primary benefit of using a neutral MCMNN holder over a standard PCLNR?
A: The MCMNN is a neutral holder, meaning it is mounted centrally. This allows you to cut in both directions and perform intricate profiling that a 95° PCLNR cannot achieve. It is a highly efficient turning tool holder for reducing the total number of tools required for a single setup.

Q: Can I use CNMM inserts for heavy-duty roughing in this holder?
A: Yes. The M-type double-clamping system is specifically designed to handle the increased cutting pressures associated with CNMM inserts. The added security of the top clamp prevents the insert from lifting during heavy-duty indexable turning tool holder operations.

Q: How does the 50° approach angle affect chip flow?
A: The 50° angle provides excellent chip thinning effects and directs cutting forces more evenly. This helps in heat dissipation and protects the carbide edges of your CNMG holder setup, especially when machining heat-resistant alloys.