How do the angle and number of cutting edges of engraving tools affect the machining effect? — In-de

introduction

Milling cutters with the same 3.175 mm diameter can have different cutting edges, some with one and some with two; and even among flat-bottomed pointed cutters, the angle can range from 15° to 90°. How exactly do these parameters affect engraving quality and efficiency? This article, from the perspective of tool geometry, helps you develop a scientific approach to tool selection.

I. The Influence of the Number of Edges

II. The Core Parameter of Pointed Cutters: The Angle

For pointed cutters (v-bit), the angle determines the level of detail and structural strength of the engraving.

1. 15° - 25° (Small Angle)

• Advantage: The tip is extremely sharp, allowing for the engraving of hair-thin lines.
• Applicable: PCB circuit boards, extremely small character engraving, seal carving.
• Constraint: The tool strength is low, and the feed rate (F) must be strictly controlled; otherwise, the tip is easily broken.

2. 30° - 45° (Medium Angle)

• Advantage: Good versatility, balancing detail and strength.
• Applicable: Two-color boards, PVC, fine font relief.

3. 60° - 90° (Large Angle)

• Advantage: High strength, good structural stability.
• Applicable: Deep carving of hard materials (like marble or hard mahogany), or coarse processing of large reliefs.

III. How to Match Angle and Number of Edges?

1. Detail Priority: Choose a small-angle pointed cutter (single edge or double edge, depending on material hardness).
2. Efficiency Priority: Choose a larger diameter double-edge milling cutter (larger angle).
3. Safety Priority (Material Hardness): The harder the material, the larger the angle of the cutter should be, and the more edges are needed (for vibration reduction).

IV. Practical Selection Tips

• Small Font (less than 1cm): Use a pointed cutter with an angle of 30° or less.
• Large Areas of Relief: Use a double-edge ball-nose cutter for finishing.
• Cutting Acrylic: Use a single-edge spiral cutter to prevent melting and sticking.

Conclusion

There is no such thing as the "best" tool, only the "most suitable" configuration. By deeply understanding the influence of angle and the number of edges, you can avoid unnecessary tool waste and significantly improve your workpiece finish. If you are unsure which parameter to choose for your project, please contact WAT technical support for professional selection advice.