DH+ Series Unequal 4 Flute High Speed Steel Endmill [Diameter: 4.0mm]

Williams Tool Co DH+ Series Un-Equal Flute High Speed Steel Endmill 

Key Features

• Optimised Cutting Edge Geometry – The extended cutting edge passes through the centre, providing a large chip evacuation space. Designed specifically for slot machining and ramp milling applications.
• High Helix Design (35°–38°) – Delivers excellent anti-vibration performance and is ideal for high-speed, high-efficiency machining of steels and cast iron.
• Unequal Flute Spacing – Reduces vibration during cutting, improving machining stability and extending tool life.
• Eccentric Relief Angle – Increases blade strength, allowing more stable cutting performance and higher feed rates while maintaining longer tool life.
• Built-Up Edge Resistance – Special coating helps prevent built-up edge during cutting, improving surface finish and tool life.
• High-Speed Machining Capability – Suitable for both dry and wet cutting conditions in high-speed machining environments.

Coating Technology

• High Performance Coating – Light golden coating designed for durability and heat resistance.
• Hardness: 2800–3000 HV
• Coefficient of Friction: 0.3
• Oxidation Temperature: 800–900°C
• Excellent Stainless Steel Performance – Designed to perform efficiently when machining stainless steel materials.

Applications

• Carbon steels (up to ~HB225)
• Alloy steels (HB225–325)
• Pre-hardened steels (up to HRC45)
• Hardened steels (HRC40–45)
• Cast iron
• Stainless steel