CBN Turning Insert TNMG160404/160408 with MTJNR1616H16 Holder – Speed

Description

Product Overview

The Hunricho CBN Turning Insert set is engineered for demanding CNC turning operations where surface integrity and tool life are paramount. It combines two TNMG1604XX CBN inserts with the robust MTJNR1616H16 external turning holder, delivering a mirror‑finish surface (Ra0.4 µm) on hardened steels ranging from 50 to 70 HRC. The inserts are sintered from cubic boron nitride, a material renowned for its low iron affinity, high thermal conductivity, and exceptional resistance to wear. This composition enables continuous high‑speed machining at up to 350 m/min while maintaining minimal flank wear, even on spring steel, ductile iron, and carburized alloys. The holder’s design provides a secure clamping mechanism that eliminates vibration, ensuring consistent dimensional accuracy across long production runs.

Usage

Designed for external turning applications on CNC lathes, this insert‑holder pair excels in machining heat‑treated components such as bearing shafts, automotive crankshafts, and aerospace fasteners. The CBN inserts thrive in interrupted cutting conditions, making them ideal for roughing and finishing passes on hardened steel, cast iron, and ductile iron parts where conventional carbide tools would fracture. Users benefit from reduced setup time because the MTJNR1616H16 holder accommodates both TNMG160404 and TNMG160408 geometries, allowing quick tool changes without compromising rigidity. The system is also suitable for high‑speed production environments where cycle time reduction and surface quality are critical.

Why Choose Us

Hunricho’s commitment to precision engineering is reflected in the rigorous quality controls applied to every insert and holder. Each CBN insert undergoes a multi‑stage sintering process that guarantees uniform grain structure and consistent hardness, delivering three times the fracture toughness of traditional ceramic tools. The MTJNR1616H16 holder is manufactured from hardened steel alloy, providing a long service life and resistance to deformation under high cutting forces. Our after‑sales support includes technical assistance for optimal tool selection, machining parameter recommendations, and a responsive warranty program that underscores confidence in product durability.

Key Features

• CBN inserts deliver a mirror‑finish surface, eliminating the need for secondary grinding operations.
• Three‑fold increase in fracture toughness compared to ceramic inserts, reducing breakage during interrupted cuts.
• Stable performance at 350 m/min enables high‑speed production without excessive flank wear.
• Universal MTJNR1616H16 holder provides secure clamping and vibration‑free operation.
• Dedicated technical support and warranty ensure confidence throughout the tool’s lifecycle.

FAQ

What hardness range can the CBN inserts handle?

The inserts are optimized for hardened steels between 50 HRC and 70 HRC, as well as cast iron and ductile iron, delivering excellent surface finish and tool life.

Can the inserts be used for both roughing and finishing?

Yes. The CBN material’s high wear resistance allows the same insert to perform roughing passes and finish to a Ra0.4 µm surface, reducing tool changes and setup time.

What cutting speed is recommended for optimal performance?

For most applications, a cutting speed of up to 350 m/min provides stable machining while minimizing flank wear. Adjust speed based on material and machine rigidity.

Is the holder compatible with other insert geometries?

The MTJNR1616H16 holder is designed to accept both TNMG160404 and TNMG160408 CBN insert geometries, offering flexibility for different machining strategies.

What warranty does Hunricho provide?

Hunricho offers a one‑year limited warranty covering manufacturing defects, along with access to technical support for machining optimization and troubleshooting.