Drill bit FANAR Wiertło węglikowy Ø6.80 mm, length 53/91 mm, 5xD, VHM, HA8, DIN 6537

Solid carbide drill bit FANAR Wiertło węglikowy Ø6.80 mm, length 53/91 mm, 5xD, VHM, HA8, DIN 6537 is a precision metalworking tool designed according to DIN 6537. The drill has a nominal diameter of 6.80 mm and two reported lengths — overall length 91 mm and working length 53 mm — with a length-to-diameter ratio of 5xD. Manufactured from VHM (solid carbide) and finished with an HA8 coating, the tool is intended for consistent hole quality and extended wear resistance in demanding drilling operations on a range of metallic materials.

Advantages

The solid carbide construction provides high stiffness and edge retention for accurate, repeatable holes. The HA8 coating improves surface hardness and reduces friction, which helps extend tool life and maintain cutting performance under elevated temperatures and heavy usage. Compliance with DIN 6537 ensures dimensional consistency and suitability for clamping systems and holders designed for that standard. The 5xD geometry balances reach and rigidity, enabling deeper holes without excessive tool deflection.

Suitable for

• Precision drilling in steel, stainless steel, cast iron and non-ferrous metals
• CNC machining centers and drilling machines requiring solid carbide tools
• Manual and production environments where repeatable hole quality is needed
• Operations demanding higher wear resistance and prolonged tool life

Key specifications

• Diameter: 6.80 mm
• Overall length: 91 mm
• Working (cutting) length: 53 mm
• Length-to-diameter ratio: 5xD
• Material: solid carbide (VHM)
• Coating: HA8
• Design standard: DIN 6537

How to use

Select appropriate spindle speed and feed rate based on the workpiece material and machine rigidity; use coolant or cutting fluid where recommended to improve chip evacuation and reduce thermal load. Secure the drill in a compatible DIN 6537 holder or chuck to minimise runout and vibration. Start with a pilot or spot drill if required for exact hole positioning, then drill using steady, controlled feeds. Withdraw periodically to clear chips when drilling deep holes, and inspect hole size and surface finish to verify parameters are correct.

Usage recommendations

For best results, match cutting parameters to the specific metal being machined and monitor tool wear. Use stable clamping, proper coolant flow, and avoid excessive feed rates that can cause premature wear or breakage. Replace the tool once hole quality degrades beyond acceptable tolerances to maintain production consistency.