🔍 What is the tip angle?
The point angle (also called the sharpening angle or face cutting angle) is the angle formed between the two main cutting edges of the drill bit. This angle influences:
- The initial penetration into the material.
- Heat dissipation.
- The precision of the hole.
- The edge resistance.
📐 Drill bits shown in the image
| Drill Bit Type | Tip Angle | Main Application | Technical Advantages |
| Standard drill bit | 118° | Soft materials (wood, aluminum) | Fast cutting, less initial effort |
| Drill bit for steel | 135° | Steels, hard metals | Less wear, better chip evacuation |
| Drill bit for plastics | 82° | Acrylics, PVC, fragile materials | Prevents cracking, more controlled cutting |
| Multipurpose drill bit | 130° | General use in workshops | Good balance between penetration and durability |
⚙️ Additional technical considerations
- Angle of incidence: Not visible in this image, but essential to avoid excessive friction. It is usually between 8° and 15°.
- Helix angle: Varies depending on the type of drill bit; affects chip evacuation.
- Drill bit material: All shown are high-speed steel (HSS), but may have coatings such as black oxide, titanium, or cobalt.