SPMT inserts are square-shaped, positive rake carbide inserts designed for milling applications. The designation SPMT is derived from ISO standards:

• S – Square shape (4 cutting edges)

• P – Positive rake angle

• M – Tolerance class (medium)

• T – Type of insert with through-hole

These inserts are commonly used in face milling, shoulder milling, and general-purpose milling of steels, stainless steels, cast iron, and non-ferrous materials.

⚙️ Applications of SPMT Inserts

SPMT carbide inserts are versatile and widely adopted in CNC machining for:

• Face Milling – Producing flat surfaces with superior finish.

• Shoulder Milling – Achieving 90° shoulders with high accuracy.

• Slot Milling – Cutting precise slots and grooves.

• General Milling – Suitable for steels, stainless steel, aluminum, and cast iron.

• High-Speed Milling – Positive rake design reduces cutting forces, enabling smooth operation.

🔍 Types of SPMT Inserts

SPMT inserts are available in multiple grades, coatings, and chipbreakers to suit different machining needs:

1. Uncoated SPMT Inserts – Ideal for aluminum and non-ferrous machining.

2. PVD-Coated SPMT Inserts – Excellent for stainless steel and finishing operations.

3. CVD-Coated SPMT Inserts – Optimized for steel and cast iron with longer tool life.

4. High-Performance Grades – Brands like Kennametal, Korloy, Taegutec, and Widia offer specialized SPMT inserts for demanding operations.

5. Different Nose Radii (R0.4, R0.8, R1.2, etc.) – Depending on the finish and cutting depth required.

⭐ Advantages of Using SPMT Inserts

• ✅ 4 Cutting Edges per insert → Cost-effective machining

• ✅ Positive Rake Geometry → Reduced cutting forces and power consumption

• ✅ Superior Surface Finish → Especially in face and shoulder milling

• ✅ Versatility → Suitable for a wide range of materials

• ✅ Brand Availability → CNC Tools Depot stocks SPMT inserts from Korloy, Widia, Kennametal, Taegutec, and more

📌 Why Buy SPMT Inserts from CNC Tools Depot?

CNC Tools Depot is the world’s largest marketplace for carbide inserts and cutting tools, ensuring:

• 🔹 Largest Inventory – All major brands under one roof

• 🔹 Competitive Prices – Direct supply from manufacturers

• 🔹 Global Shipping – Fast and reliable delivery

• 🔹 Expert Support – Get the right insert for your application