Drill Breakage and Solutions

During drilling operation, problems with drills broken are often encountered. Now, PURROS Machinery lists the solutions of drill breakage as below:

During drilling operation, problems with drills broken are often encountered. PURROS Machinery lists the solutions of drill breakag.

Drill Breakage and Solutions

  1. Causes: In accurate machine; processedmaterials are deformation
    Solutions: Increase the rigidity of machine, drill and work clamping
  2. Causes: Relief angle (Clearance Angle) is too small
    Solutions: Regrind correctly that means enlarge the relief angle
  3. Causes: Feed rate is too high
    Solutions: Decrease the feed rate
  4. Causes: Excessive cutting tool wear
    Solutions: Regrind it as new before (Note: Drill bit Grinder for regrind drill bit is a good choice. More grinders view products page: http://www.drillbitgrinder.com/products/)
  5. Causes: Chip packing (Chip Removal)
    Solutions: Select suitable drill (wide flute, high helix oil hole-drill). Change cutting conditions (feed rate or adopt step drilling).
  6. Causes: Difficulty entering the material (drill hardly for selecting drill bit)
    Solutions:
    ① Select high rigid cutting tool & rigid drill machine
    ② Increase work clamping rigidity, maybe the workpiece clamp loosely
    ③ Select a low cutting resistance thinning
    ④ Use centering, which will increase stability
    ⑤ Work piece should be horizontal
    ⑥ Use bush drill (Drill Jig Bush is a special device that will guide the drill bit to drill in the setmachining path)
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