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:
12 comments Page 2 of 2.
Ayush Asthana said:
5 months 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.
Venkatesh said:
1 day ago
Low angles (<30deg) are best for hard, high-rigidity materials, while high angles (>45deg) excel at shearing soft, ductile materials.
But in case of plastic due to higher helix angle chip wrap around the tool. So it is difficult to machine.
Low helix angle is the right answer.
But in case of plastic due to higher helix angle chip wrap around the tool. So it is difficult to machine.
Low helix angle is the right answer.
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