DCMT 11T304-HMP OS4011 Carbide Turning Insert

The DCMT 11T304-HMP OS4011 is a precision-engineered carbide turning insert designed for finishing operations on CNC and conventional lathes. With its 55° diamond (D-shape) geometry and positive rake design, it offers excellent accessibility for intricate profiles, fine turning, and applications where high dimensional accuracy is required. The 0.4 mm corner radius ensures sharp cutting action, superior surface finishes, and minimal cutting resistance, making it ideal for finishing delicate components.

Produced in OS4011 grade, the insert is built from a fine-grained carbide substrate with a durable PVD coating that enhances wear resistance and toughness. It performs reliably on steels and stainless steels under continuous and light interrupted cuts. The HMP chipbreaker is optimized for finishing and semi-finishing, ensuring smooth chip evacuation, reduced cutting forces, and extended tool life.

The DCMT 11T304-HMP OS4011 is compatible with SDJCR and SCLCR tool holders, designed for positive-rake D-shaped inserts. It is widely used in industries such as precision machining, automotive, and mold-making, where fine surface quality and repeatability are essential.

Code Breakdown:

• D – Insert shape: 55° diamond

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

• M – Tolerance class (medium)

• T – Insert with hole and chipbreaker

• 11 – Insert size: 11 mm

• T3 – Insert thickness: 3.97 mm

• 04 – Corner radius: 0.4 mm

• HMP – Chipbreaker for finishing and semi-finishing

• OS4011 – Grade for steels and stainless steels

Key Features:

• DCMT-style 55° diamond positive-rake insert

• Size: 11 mm, thickness 3.97 mm, radius 0.4 mm

• OS4011 grade – PVD-coated for steels and stainless steels

• HMP chipbreaker for precise finishing operations

• Sharp cutting edge for smooth surfaces and low cutting forces

• Compatible with SDJCR, SCLCR holders

• Best for finishing steels and stainless steels

Grade Information (OS4011):

• Coating: PVD

• Application: turning steels and stainless steels

• Best for: finishing and semi-finishing

• Cutting speed: 120–220 m/min

• Material hardness: HRC <35