CCMT 09T304-HMP OS8225 Carbide Turning Insert

The CCMT 09T304-HMP OS8225 is a positive-rake carbide turning insert designed for finishing and semi-finishing operations on CNC and conventional lathes. Featuring an 80° diamond (C-shape) geometry with a positive clearance angle, it ensures low cutting forces, smooth chip flow, and precise dimensional accuracy. The 0.4 mm corner radius is optimized for fine finishing, making it suitable for applications where high surface quality is required.

Produced in OS8225 grade, this insert combines a fine-grained carbide substrate with a black PVD coating engineered for high wear resistance and toughness. It is primarily optimized for machining steels under medium cutting conditions, offering stable performance and extended tool life. The HMP chipbreaker provides reliable chip evacuation and stability during semi-finishing cuts, enhancing surface quality and cutting efficiency.

The CCMT 09T304-HMP OS8225 is compatible with SCLCR and SCBCR holders, designed for positive-rake C-shaped inserts. It is widely applied in general engineering, automotive, and mechanical industries where precision and durability are required for machining steels.

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

• 04 – Corner radius: 0.4 mm

• HMP – Chipbreaker for finishing/semi-finishing

• OS8225 – Grade optimized for steels

Key Features:

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

• Size: 9 mm, thickness 3.97 mm, radius 0.4 mm

• OS8225 grade – wear-resistant black PVD coating for steels

• HMP chipbreaker for finishing and semi-finishing

• Positive rake for smooth cutting and reduced forces

• Six cutting edges for cost efficiency

• Fits holders: SCLCR, SCBCR

• Best for precision machining of steels

Grade Information (OS8225):

• Coating: PVD, black color

• Application: turning and milling of steels (general purpose)

• Best for: medium machining of steels

• Material hardness: HRC <30

• Cutting speed: 180–250 m/min