Counterbore Drill Bit Set For CNC Milling 5 Piece M3 To M8 Countersink End Mills 4 Flute HSS AL High Speed Steel For Copper Aluminum Steel Cast Iron Machining Ausenzup

5-Piece M3 to M8 Countersink End Mills for CNC Milling
✔️ Set includes M3, M4, M5, M6, M8 sizes for copper to steel

This countersink end mill set is designed for CNC milling and mold work, featuring HSS-AL high speed steel for long life. It is ideal for machining copper, aluminum, steel, and cast iron with precise hole and countersink accuracy in a compact 5-piece pack.

✅ Material: HSS-AL high speed steel, hardness 65-68 HRC
✅ Size range: M3, M4, M5, M6, M8 in metric set
✅ Applications: copper, aluminum, steel, and cast iron milling
✅ 4 flute design for efficient chip removal and finish
✅ Pack: 5 pieces in a compact set for various hole sizes

💡 What is a countersink end mill set used for in CNC milling?

It's a handy set for creating clean countersinks and precise bolt holes across various metals.

- Creates flush countersinks for bolt holes
- Suitable for copper, aluminum, steel, and cast iron
- 4 flute geometry improves chip clearance and finish