Drill Angles (हिन्दी), Cutting Angle, Clearance Angle, Helix Angle, Rake Angle 

Different types of Drill Angles (ड्रिल कोण)
1. Cutting Angle, Point Angle
2. Clearance Angle
3. Helix Angle
• H-Type
• N-Type
• S-Type
4. Rake Angle
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