Masterdrill Solid Carbide Drill Bit 4.00 mm, 5xD, Internal Coolant, DIN 6537 L, AlTiN Coated

Precision drilling in tough materials demands a tool that stays sharp, stable, and accurate. The Masterdrill solid carbide drill bit with 4.00 mm diameter and 5xD depth ratio is engineered for CNC machining centres and high-performance drilling in steel, stainless steel, cast iron, and non-ferrous metals. Its internal coolant channels deliver coolant directly to the cutting zone, reducing heat and improving chip evacuation for longer tool life and better hole quality.

Key specifications

• Drill diameter: 4.00 mm
• Flute length: 36 mm
• Overall length: 74 mm
• Depth ratio: 5 x D
• Material: solid carbide (VHM)
• Coating: AlTiN (Aluminium Titanium Nitride)
• Shank: cylindrical, DIN 6535 HA, h6 tolerance
• Coolant: internal (IK)
• Standard: DIN 6537 L
• Point angle: 140°
• Helix angle: 30°
• Number of flutes: 2
• Series: Masterdrill

Why choose it

The AlTiN coating provides high heat resistance and hardness, allowing higher cutting speeds and feed rates compared to uncoated drills. The solid carbide construction ensures excellent rigidity and wear resistance, while the internal coolant supply keeps the cutting edges cool, preventing thermal cracking and extending tool life. The precise h6 shank tolerance guarantees secure clamping and minimal runout for accurate hole positioning.

Ideal use cases

• CNC milling and drilling operations in steel and stainless steel
• High-volume production drilling in cast iron components
• Precision hole making in non-ferrous metals like aluminium and copper
• Applications requiring deep holes up to 5 times the diameter
• Use with through-tool coolant systems for optimal performance

Good to know

This drill bit is manufactured to DIN 6537 L standards, ensuring compatibility with standard tool holders and collets. The 140° point angle provides excellent self-centring and reduces cutting forces. For best results, use with a rigid setup and proper coolant pressure as recommended for internal coolant drills. The Masterdrill series is known for consistent quality and performance in demanding industrial environments.