Carbide Drill Bit VHM MasterDrill DIN 6537, Ø5.10 mm, 28/66 mm, 3xD, HA6 coating

Solid carbide drill bit MasterDrill manufactured to DIN 6537 with a diameter of 5.10 mm, overall length 66 mm and working length 28 mm (3xD). The VHM construction and HA6 surface coating provide increased wear resistance and thermal stability for high-speed drilling of hardened steels and general metalworking. The geometry is optimised for precise centring, stable chip evacuation and consistent hole quality in industrial and workshop applications.

Advantages

The carbide body ensures rigidity and minimal deflection during drilling, while the HA6 coating reduces abrasive wear and extends tool life. The 3xD length ratio balances reach and stiffness for controlled drilling depths. Ground flutes and point geometry improve centring accuracy and reduce thrust, enabling faster cycle times and repeatable hole diameters.

Suitable for

• High-speed drilling in hardened and alloyed steels
• General-purpose metalworking in production and toolrooms
• Precision drilling where tight diameter tolerances are required
• Short- to medium-depth holes up to three times the diameter

When it may not be suitable

This solid carbide 3xD drill is not intended for deep-hole drilling beyond the specified 3xD range; for deeper holes, specialized long-reach or gun drills are more appropriate. It may not be the best choice for extremely interrupted cuts or highly abrasive cast materials unless machining parameters are adjusted and coolant is applied.

Key specifications

• Material: solid carbide (VHM)
• Diameter: 5.10 mm
• Overall length: 66 mm
• Working length: 28 mm (3xD)
• Coating: HA6 surface treatment
• Standard: DIN 6537

How to use

Secure the drill in a suitable collet or drill chuck with adequate runout control. Use appropriate cutting speeds and feeds for carbide tooling and the workpiece material; apply coolant or cutting fluid when machining steels to control temperature and improve chip evacuation. Start with conservative feed rates and increase gradually while monitoring hole quality. Retract periodically on long runs to clear chips and maintain coolant flow to the cutting edge.

What to consider before purchase

• Confirm compatibility of diameter and working length with required hole depth and machine spindle
• Check machine speed and feed capability for carbide tooling
• Consider workpiece material and whether HA6 coating matches the intended application

Usage recommendations

Use steady spindle speeds and consistent feed; prefer through-coolant or external flood coolant for steel machining, and replace the drill at the first signs of excessive wear to maintain hole accuracy. For best life, avoid heavy pecking cycles with high impact and inspect tool runout regularly.