Helix Angle of Drills
Helix angle in drills is basically the measure of twist in the drill flutes.
Most twist drills have about 30 Degree helix angle. And this is also known as the standard helix angle of drills which optimizes chip ejection, drill rigidity and drill’s cross-sectional strength.
There are High Helix Drills, which are also know as Fast Spiral Angle Drills and have 40 Degree Helix. They are used for high feed rates under low spindle speeds usually on softer non-ferrous metals like aluminium, brass and in some plastics.
High Helix Drills are used for Deep Hole Drilling. In General the deeper the hole, the higher the Helix angle should be for chip removal.
Low Helix Drills or Slow Spiral Angle Drills, typically have about 12 Degree Helix. They are used with High Spindle Speeds and Hard to Drill Materials.These low Helix Drills have increased cutting edge strength and work well on materials with a tendency to Gall or Clog the Drill Hole.
In a Non-Production setting though, the standard helix angle is satisfactory for nearly every Drilling task.
Post time: Jan-26-2024
