Drill Bit FANAR WIERTLO WĘGLIK Ø8.50 mm, 41/79 mm, 3xD, HA10 VHM Blue Cut

Solid carbide drill bit FANAR WIERTLO WĘGLIK Ø8.50 mm with a total length of 79 mm and a working length of 41 mm, offering a 3xD length ratio for standard-depth metal drilling operations. The tool is manufactured from HA10 grade cemented carbide (VHM) and finished with a Blue Cut coating designed to enhance wear resistance and improve chip evacuation. It is intended for precision drilling in a range of metallic materials and industrial machining environments where dimensional accuracy and repeatable hole quality are required.

Advantages

The FANAR solid carbide design provides high rigidity and thermal stability during cutting, while the HA10 carbide grade balances hardness and toughness for general-purpose metalworking. The Blue Cut coating reduces friction and helps prevent built-up edge, which contributes to longer tool life and more consistent surface finishes. The 3xD flute length supports efficient chip removal and stable drilling at moderate depths.

Suitable for

• Through and blind drilling in steel and cast iron
• Precision machining in CNC and manual drilling machines
• Production runs requiring repeatable hole diameter and surface quality
• Operations where carbide tooling is preferred for wear resistance

Key specifications

• Material: solid cemented carbide (VHM), HA10 grade
• Diameter: 8.50 mm
• Overall length: 79 mm
• Working (cutting) length: 41 mm
• Length ratio: 3×D
• Coating: Blue Cut for enhanced wear resistance and reduced friction
• Flute type: spiral flutes for chip evacuation

How to use

Mount the drill bit securely in a compatible chuck or tool holder and set appropriate spindle speed and feed rate for the workpiece material and diameter. Apply coolant or cutting fluid as required to reduce cutting temperatures and aid chip evacuation. Start drilling with light axial pressure until the drill establishes a stable cutting path, then proceed with consistent feed to full depth. Retract periodically on deep holes to clear chips when necessary and inspect hole quality during production runs.

Usage recommendations

Choose cutting parameters based on the workpiece material: lower speeds for hard or heat-sensitive alloys and higher speeds for softer steels. Use appropriate coolant and ensure rigid tool clamping to maximize tool life and maintain dimensional accuracy.