Mechanical Engineering - Production Engineering - Discussion
Discussion Forum : Production Engineering - Section 4 (Q.No. 10)
10.
Low helix angle drills are preferred for drilling holes in
Discussion:
11 comments Page 2 of 2.
Ayush Asthana said:
2 days ago
Explanation:
Helix angle of a drill refers to the angle between the leading edge of the flute and the drill axis.
A low helix angle (15°–20°) means the flutes are less twisted.
Material Preferred: Helix Angle - Reason.
Plastics : Low helix angle - Prevents excessive cutting and reduces the tendency to grab or chip the soft material.
Copper/Aluminium (soft, ductile metals) : High helix angle (35°–45°) - Improves chip removal.
Cast steel/Carbon steel (hard materials): Medium helix angle (25°–30°) - Balanced cutting and chip evacuation.
Therefore, low helix angle drills are best for plastics.
Helix angle of a drill refers to the angle between the leading edge of the flute and the drill axis.
A low helix angle (15°–20°) means the flutes are less twisted.
Material Preferred: Helix Angle - Reason.
Plastics : Low helix angle - Prevents excessive cutting and reduces the tendency to grab or chip the soft material.
Copper/Aluminium (soft, ductile metals) : High helix angle (35°–45°) - Improves chip removal.
Cast steel/Carbon steel (hard materials): Medium helix angle (25°–30°) - Balanced cutting and chip evacuation.
Therefore, low helix angle drills are best for plastics.
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