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3-flute Carbide Fret Cutters (MM3I8-0250-010F) - 1/8 in. (0.125 in. shank )

Carbide 3-flute end mills for curring frets hardwood and softwood fingerboards UltraBIT fret cutters were designed specifically for cross-grain cutting in ebony and dry rosewood. They are used for cutting the fret slots (kerfs) in fingerboards and for executing the clean-up pass when cutting inlay pockets. The enhanced rigidity of the three flute design insures minimum point deflection (wander) under high feed rates.
  • Geometry - 3 flute, 1/8 in. shank, fish tail point
  • Length - 1.5 in. 0.010 in.
  • Diameter - nominal  0.0005 in.
  • Max runout (TIR) - < 0.0005 in.
  • Max. depth of cut - nominal 0.005 in.
  • Anticipated Life - 3,000 linear inches (cross-grain ebony, CNC milling)
  • Material - solid submicrograin carbide
  • Ring Set - 0.800 in. 0.002 in. (optional)
  • Operating RPM - CNC certified operation 20k RPM to 100k RPM
  • Feeds/speeds - to determine the optimum Feed/Speed combinations,
    run our Sweet-spot Test.



  • Fish tail point eliminates  backside breakout and splintering
  • High flute volume supports high feed rates / chip loads
  • 3-Flute design eliminates chatter at high feed rates
  • 3-Flute design brings the rigidity and precision of a stub mill to a high-aspect ratio cutter.
  • Cutting edge geometry tuned for cross-grain ebony machining


  • Cutting fret slots in rosewood and ebony finger boards
  • Clean-up cutting of inlay pockets and components


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Updated 10/7/2016 5:35:40 PM