Custom Size 4 Flute Carbide End Mill Bits For 62HRC Hardened Steel Machining

When machining hard metal materials like mold steel exceeding 62HRC, standard tools often experience rapid wear. Our D12 air-avoiding milling cutter solves this challenge with specialized design for deep hole and groove machining in hard metals, delivering smoother operation and superior precision.

Constructed from high-strength carbide with specialized surface treatment, this tool maintains dimensional stability under high temperatures. The unique thin neck ("air-avoiding") design prevents workpiece contact during operation, eliminating friction, vibration, and tool damage. Ideal for extended machining in deep holes, grooves, and confined spaces.

• Tool Type: Relief End Mill (Reduced Neck End Mill)
• Diameter: D12 (customizable D2-D20)
• Material: Ultra-fine grain carbide
• Coating: Nano coating (optional TiAlN / DLC / customizable)
• Flutes: 2 or 4 flutes (customizable per request)
• Helix Angle: 30° (optimized chip evacuation)
• Applicable Machines: CNC machining centers, high-speed milling machines

• Machining hard metals including mold steel, stainless steel, and tool steel
• High-precision industries: mold making, automotive components, medical devices, aerospace parts
• Deep hole, deep slot, and confined space machining