How Geometry Dictates Your Drilling Costs
The Hidden Science of Twist Drills: How Geometry Dictates Your Drilling Costs
Industry Shock: 68% of manufacturing downtime stems from drill bit failures. Discover how proper selection can reduce your per-hole cost by 53% (NASA-funded study).
Material Showdown: Data-Driven Selection Guide
| Material | Hardness (HV) | Heat Resistance | Best Drill Type | Max SFM* |
|---|---|---|---|---|
| Aluminum | 40-60 | 400°F (204°C) | Polished Flute HSS | 600-1000 |
| Stainless 304 | 175-200 | 1500°F (816°C) | M35 Cobalt (8% Co) | 60-100 |
| Titanium | 250-350 | 1100°F (593°C) | TiAlN-Coated Carbide | 30-70 |
| Cast Iron | 200-300 | 1000°F (538°C) | TiN-Coated HSS | 80-150 |
Coatings Exposed: Lab-Tested Performance
▶ TiAlN (Aluminum Titanium Nitride)
-45% friction vs uncoated Withstands 1470°F (800°C) Best for: High-temp alloys
▶ Diamond-Like Carbon (DLC)
Hardness: 4000 HV +400% life in composites
▶ ZrN (Zirconium Nitride)
Non-stick for aluminum Reduces built-up edge by 80%