DCMT 11T308-HMP OS4011 Carbide Turning Insert

The DCMT 11T308-HMP OS4011 is a high-precision carbide turning insert designed for semi-finishing and finishing operations on CNC lathes and conventional machines. Its 55° diamond (D-shape) geometry offers excellent accessibility for intricate profiles and fine machining, making it ideal for applications where dimensional accuracy and surface quality are critical. The 0.8 mm corner radius provides balanced edge strength and smooth surface finishes.

Produced in OS4011 grade, this insert is built on a fine-grained carbide substrate with a PVD coating that delivers excellent wear resistance, toughness, and thermal stability. It is optimized for steels and stainless steels, offering reliable performance in both continuous and light interrupted cutting. The HMP chipbreaker is engineered for stable chip evacuation in semi-finishing operations, reducing cutting forces and enhancing tool life while ensuring consistent part quality.

The DCMT 11T308-HMP OS4011 is compatible with SDJCR and SCLCR tool holders, designed for positive-rake D-shaped inserts. It is widely applied in precision engineering, automotive, and general machining where reliable finishing 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

• 08 – Corner radius: 0.8 mm

• HMP – Chipbreaker for semi-finishing and finishing

• OS4011 – Grade for steels and stainless steels

Key Features:

• DCMT-style 55° diamond positive-rake carbide insert

• Size: 11 mm, thickness 3.97 mm, radius 0.8 mm

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

• HMP chipbreaker for semi-finishing and finishing operations

• Positive rake for smooth cutting and reduced forces

• Fits holders: SDJCR, SCLCR

• Ideal for precise machining of steels and stainless steels

Grade Information (OS4011):

• Coating: PVD

• Application: turning of steels and stainless steels

• Best for: finishing and semi-finishing operations

• Cutting speed: 120–220 m/min

• Material hardness: HRC <35