TNMG 160408-MF3 OS9201S Carbide Turning Insert

The TNMG 160408-MF3 OS9201S is a negative-rake carbide turning insert designed for semi-finishing operations on CNC and conventional lathes. Featuring a 60° triangular geometry, it provides strong cutting edges and six usable edges per insert, ensuring excellent cost efficiency. The 0.8 mm corner radius improves insert strength and durability, enabling stable machining at higher feed rates while maintaining consistent surface quality.

Produced in the advanced OS9201S grade, this insert combines a fine-grained carbide substrate with a silver-colored PVD coating. This combination provides superior wear and heat resistance, making the insert an excellent choice for stainless steels, titanium alloys, and high-temperature alloys. The MF3 chipbreaker is optimized for semi-finishing, ensuring controlled chip flow, reduced cutting forces, and smooth cutting performance under continuous machining conditions.

The TNMG 160408-MF3 OS9201S is compatible with MTJNR and TTJNR holders, designed for triangular inserts. It is widely applied in aerospace, medical, and precision engineering industries where machining efficiency and stability on hard-to-cut materials are essential.

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

• 08 – Corner radius: 0.8 mm

• MF3 – Chipbreaker for semi-finishing

• OS9201S – Grade optimized for stainless steels, titanium, and high-temp alloys

Key Features:

• TNMG-style 60° triangular carbide insert

• Size: 16×16 mm, thickness 4.76 mm, radius 0.8 mm

• Grade OS9201S – excellent wear and heat resistance

• MF3 chipbreaker for semi-finishing and chip control

• Six cutting edges for cost efficiency

• Negative rake geometry for durability and stability

• Fits holders: MTJNR, TTJNR

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

Grade Information (OS9201S):

• Coating: PVD, silver color

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

• Best for: continuous cutting of stainless steels and titanium

• Material hardness: HRC <45

• Cutting speed: 40–220 m/min