CCMT 09T308-MF3 OS9201S Carbide Turning Insert

The CCMT 09T308-MF3 OS9201S is a positive-rake carbide turning insert designed for semi-finishing operations in CNC and conventional lathes. Its 80° diamond (C-shape) geometry with a positive clearance angle ensures smooth cutting, lower cutting forces, and excellent surface quality. The 0.8 mm corner radius increases edge strength, allowing stable machining at higher feed rates while maintaining accuracy.

Made from the advanced OS9201S grade, this insert features a fine-grained carbide substrate with a silver-colored PVD coating that delivers superior wear resistance and thermal stability. It is optimized for machining stainless steels, titanium alloys, and high-temperature alloys. The MF3 chipbreaker ensures efficient chip control and smooth cutting action, particularly in semi-finishing operations where surface quality is critical.

The CCMT 09T308-MF3 OS9201S is compatible with standard SCLCR and SCBCR holders, designed for positive-rake C-shaped inserts. It is widely used in aerospace, medical, and precision engineering industries where machining efficiency, reliability, and consistency on hard-to-cut materials are required.

Code Breakdown:

• C – Insert shape: 80° diamond

• C – Clearance angle: 7° (positive rake)

• M – Tolerance class (medium)

• T – Insert with hole and chipbreaker

• 09 – Insert size: 9 mm

• T3 – Insert thickness: 3.97 mm

• 08 – Corner radius: 0.8 mm

• MF3 – Chipbreaker for semi-finishing

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

Key Features:

• CCMT-style 80° diamond positive-rake carbide insert

• Size: 9 mm, thickness 3.97 mm, radius 0.8 mm

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

• MF3 chipbreaker for semi-finishing and chip control

• Positive rake for lower cutting forces and smoother finishes

• Fits holders: SCLCR, SCBCR

• Ideal for stainless steels, titanium alloys, and high-temp 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