Solid Carbide Twist Drill Bit 6.8 mm, 3xD, DIN 6535 HA, h7, 140° Point

In a busy CNC machining cell, a toolmaker clamps this 6.8 mm solid carbide drill into a high-speed spindle and starts a batch of stainless steel flanges. The drill plunges 20.4 mm deep in one pass, chips curling away cleanly, and exits without a hint of wander. That is the everyday reality for this W.6040680X — a precision-ground carbide drill built for repeatable, accurate holes in demanding materials.

Key specifications

• Diameter: 6.80 mm (h7 tolerance)
• Working length: 34 mm; total length: 79 mm
• Drilling depth: 3×D (20.4 mm max)
• Shank: Cylindrical, DIN 6535 HA, 8 mm diameter
• Point angle: 140°; 2 flutes; external coolant
• Solid carbide (VHM) for high hardness and wear resistance

Why choose it

The solid carbide construction delivers high rigidity and heat resistance, allowing higher cutting speeds and longer tool life compared to HSS. The 140° point geometry provides excellent self-centering and reduces thrust, while the h7 shank tolerance ensures precise clamping in hydraulic or shrink-fit holders. Suitable for steel, stainless steel, cast iron, and non-ferrous metals, this drill is a versatile performer in general-purpose drilling operations.

Ideal use cases

• CNC milling and drilling centers
• Production drilling in stainless steel and alloy steel
• Precision hole-making in automotive and general engineering
• Job shops needing a reliable 6.8 mm carbide drill for mixed materials

Good to know

The drill is designed for external coolant supply; for deep holes or high-speed applications, consider through-tool coolant if available. Always use proper speeds and feeds for carbide to avoid chipping. The DIN 6535 HA shank is compatible with standard collets and hydraulic chucks. For best results, ensure rigid setup and adequate chip evacuation.