Question
Download Solution PDFLow helix angle drills are used for drilling holes in
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation :
Helix angle
- It is the angle formed by the leading edge of the land with a plane having the axis of the drill.
- Its usual value is 30°.
- The low-helix drill was developed primarily to drill brass and other thin materials like plastics. Because of its design, the low-helix drill can remove the larger volume of chips formed by high rates of penetration.
- High helix-drills are designed for drilling deep holes in aluminium, copper, die-cast material, and other metals where the chips have a tendency to jam in a hole. The angles vary between (35° - 45°).
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