FAMAG HSS pre-drill bits  are engineered to bore accurate pilot holes ahead of counterboring and reaming. With a fully ground flute and robust high-speed steel construction, these bits ensure clean entry, precise guidance, and long-lasting performance in woodworking and metalworking applications.

📏 Technical Specifications

• Drill Ø: 8 mm

  • Shank Ø: 8 mm

  • Overall Length: 75 mm

  • Usable Length: 50 mm

  • HSS pilot drill for Ø 20 - 35 mm

• Drill Ø: 10 mm

  • Shank Ø: 10 mm

  • Overall Length: 75 mm

  • Usable Length: 50 mm

  • HSS pilot drill for Ø 40 - 120 mm

   

• Material: Fully ground high-speed steel (HSS)

• Compatibility: Fits Bormax® Prima Long and standard countersink spindles

🎯 Key Benefits

• Precision Boring: Sharp, brad-point tip creates exact pilot holes without wandering.

• Clean Finish: High-quality HSS flutes evacuate chips for burr-free holes.

• Extended Durability: Hard-wearing steel resists heat and wear under continuous use.

• Seamless Integration: Standard shank sizes allow quick bit changes in common chucks and holders.

⚙️ Application Tips

1. Select Correct Diameter: Match bit size to your counterbore or screw pilot requirements.

2. Secure Workpiece: Clamp material firmly to avoid deflection or slippage.

3. Optimal Speed: Run at 1 500–2 200 rpm for wood; reduce speed for metals.

4. Lubrication: Use light cutting oil on metal to extend bit life and improve finish.

5. Maintain Sharpness: Inspect edges regularly and regrind or replace when dull.