Troubleshooting

Carbide Endmills | Carbide Drills | Carbide Reamers

Problem Cause Solution
Heavy Wear at Outer Edge
  • Insufficient coolant,/li>
  • Incorrect speed & feed
    •
  • 5, 6
  • 1, 2, 8
    •
    Chipping at Outer Cutting Edge
  • Loose tool, tool movement
  • Workpiece movement
  • Poor coolant conditions
  • Incorrect speed & feed
    •
  • 8, 10, 11, 12, 14, 16, 17, 21
  • 8, 12, 13, 21
  • 5, 6
  • 1, 2, 3, 4
    •
    Drill Point Chipping
  • Loose tool, tool movement
  • Incorrect speed & feed
  • Drill centering
    •
  • 10, 11, 12, 14
  • 1, 2, 3, 4
  • 8, 10, 11, 12, 21
    •
    Margin Wear
  • Drill margin rubbing wall
  • Poor chip evacuation
  • Poor coolant conditions
  • Workpiece movement
    •
  • 20 (check drill for backtaper)
  • 5, 6, 8, 20
  • 5, 6
  • 8, 13, 21
    •
    Tool Breakage
  • Loose tool, tool movement
  • Workpiece movement
  • Wrong drill type
  • Poor coolant conditions
  • Incorrect speed & feed
    •
  • 8, 10, 11, 12, 14, 16, 17, 21
  • 8, 12, 13, 21
  • 9, 15, 16, 18, 19, 20
  • 5, 6
  • 1, 2, 3, 4
    •
    Poor Tool Life
  • Incorrect speed & feed
  • Poor coolant conditions
  • Wrong drill point
    •
  • 1, 2, 3, 4
  • 5, 6
  • 8, 21
    •
    Drill Walk
  • Incorrect speed & feed
  • Tool wear
  • Wrong drill point
  • Material condition
    •
  • 1, 2
  • 7, 8, 21
  • 8, 10, 11, 21
  • 11, 12, 15, 16, 17
    •
    Chip Welding
  • Poor coolant conditions
  • Wrong drill type
    •
  • 5, 6
  • 19, 20
    •
    Hole Size Inaccuracy
  • Incorrect speed & feed
  • Poor coolant conditions
  • Loose tool
  • Wrong drill type
    •
  • 1, 2, 3, 4
  • 5, 6
  • 14
  • 9, 18
    •
    Non-Cylindrical Hole
  • Loose tool, tool movement
  • Workpiece movement
  • Incorrect speed & feed
  • Wrong drill type
    •
  • 8, 10, 11, 12, 14, 16, 17
  • 13
  • 1, 2
  • 18, 21
    •
    Heavy Burr
  • Incorrect speed & feed
  • Incorrect drill point
    •
  • 1, 2
  • 8, 21
    •
    Blue Chips
  • Poor coolant conditions
  • Tool wear
    •
  • 5, 6
  • 7, 8
    •
    Long Chips
  • Poor point grind
  • Incorrect speed & feed
    •
  • 8
  • 1, 2
    •

    Solutions Key 1) Reduce RPM
    2) Increase feed
    3) Increase RPM
    4) Reduce feed
    5) Increase coolant
    6) Increase mixture
    7) Add negative hone
         		  8) Repoint drill
      9) Correct drill type/size
    10) Use self-centering drill
    11) Spot/center drill
    12) Clean surface
    13) Improve rigidity/clamp
    14) Tighten holder
         		15) Use straight flute
    16) Use stub length
    17) Place further up holder
    18) Use three-flute
    19) Use slower helix
    20) Use parabolic design
    21) Change point style