Drill bit Tvardy HSS M2 3.5 mm extended black-gold for metal

Tvardy HSS M2 3.5 mm extended drill bit with black-gold coating is designed for drilling metal components where extra reach is required. Made of high-speed steel (HSS M2), this extended-length bit combines wear resistance and improved heat tolerance for sustained performance during through-hole and deeper drilling operations. The black-gold finish provides additional surface protection and helps reduce friction when cutting metal sheets, profiles and machine parts.

Advantages

The HSS M2 construction offers a balance of hardness and toughness that supports repeated use in metalworking applications. The extended length enables drilling through thicker materials or reaching confined areas without changing to a specialized tool. The black-gold coating helps reduce galling and improves chip evacuation, contributing to longer tool life and more consistent hole quality. The 3.5 mm diameter provides a precise core size suitable for pilot holes, fastening prep and small-precision through holes.

Suitable for

• Drilling metal sheets and plates
• Creating through holes in profiles and frames
• Preparing pilot holes for tapping and fastening
• Working on machinery parts and assemblies

Key specifications

• Material: High-speed steel (HSS M2)
• Diameter: 3.5 mm
• Length type: Extended length for deeper drilling
• Coating: Black-gold surface finish for reduced friction
• Intended material: Metal (sheets, profiles, machine parts)
• Compatible with: Handheld drills and drill presses

How to use

Secure the workpiece firmly and select an appropriate speed for HSS bits when drilling metal—moderate to high rpm depending on material thickness. Use cutting fluid or coolant for improved heat dissipation and chip removal, especially during prolonged drilling. Align the extended bit carefully to avoid deflection, and apply steady, even feed pressure until the hole is complete. Retract periodically if drilling deep holes to clear chips and reduce heat buildup.

Usage recommendations

For best results, use with proper clamping and recommended cutting fluid; select a suitable drill speed and avoid excessive lateral force to maintain drill geometry and extend service life.