TNMG 160404-MF3 OS9201S Carbide Turning Insert

The TNMG 160404-MF3 OS9201S is a negative-rake carbide turning insert designed for semi-finishing operations on CNC and conventional lathes. Its 60° triangular geometry provides high edge strength and six cutting edges, delivering excellent cost efficiency. With a 0.4 mm corner radius, it ensures fine surface finishes and dimensional accuracy, making it suitable for applications requiring precision.

Made from the advanced OS9201S grade, this insert combines a fine-grained carbide substrate with a silver-colored PVD coating that provides high wear and heat resistance. It is optimized for machining stainless steels, titanium alloys, and high-temperature resistant alloys. The MF3 chipbreaker is engineered for semi-finishing, offering efficient chip control, stable cutting action, and smooth surface quality under continuous cutting conditions.

The TNMG 160404-MF3 OS9201S fits standard MTJNR and TTJNR holders, designed for 60° triangular inserts. It is commonly used in aerospace, medical, and precision engineering industries where accuracy and performance in machining difficult-to-cut materials are critical.

Code Breakdown:

• T – Insert shape: 60° triangular

• N – Clearance angle: 0° (negative rake)

• M – Tolerance class (medium)

• G – Insert with hole and chipbreaker

• 16 – Insert size: 16 mm

• 04 – Insert thickness: 4.76 mm

• 04 – Corner radius: 0.4 mm

• MF3 – Chipbreaker for semi-finishing

• OS9201S – Grade optimized for stainless steels, titanium alloys, and heat-resistant alloys

Key Features:

• TNMG-style 60° triangular carbide turning insert

• Size: 16×16 mm, thickness 4.76 mm, radius 0.4 mm

• OS9201S grade – wear and heat resistance for stainless steels and alloys

• MF3 chipbreaker for semi-finishing and chip control

• Six cutting edges for cost efficiency

• Negative rake design for strength and durability

• Fits holders: MTJNR, TTJNR

• Ideal for stainless steels, titanium, and heat-resistant alloys

Grade Information (OS9201S):

• Coating: PVD, silver color

• Application: semi-finishing turning of titanium alloys, high-temperature alloys, stainless steels (304, 316)

• Best for: continuous cutting of titanium alloys and stainless steels

• Material hardness: HRC <45

• Cutting speed: 140–220 m/min