CNC router tools for woodworking, metal machining, plastic cutting and composite cutting with precision collets and toolholders
Think & Tinker, Ltd.
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UltraBIT Mother-of-Pearl / Shell  / Soft Stone Cutters (MS3I8) - (0.125" shank )

After years of experimenting with different flute geometries, tip designs and cutting parameters, we finally have a cutter that is optimized for high-speed cutting of natural mother-of-pearl and abalone. Superior bit life and fracture-free edges with no chipping or flaking are the result of a cutter geometry that is precisely tuned to the machining properties of natural shell products. The tools are designed specifically for use in CNC based cutters where relatively high, uniform feed rates can be maintained.

Our older, 3-flute chip-breaker design, which has found a home in tile-cutting and soft-stone carving, as well as the hand shaping of mother of pearl and abalone, will continue to provide a low cost alternative to hobbyists, model makers, and instrument repair professionals.
Carbide 3-flute Reach End Mills for Cutting Mother of Pearl, Ablam, Pearlam and Hardwoods
Natural Shell


  • Geometry - 3 flute, 1/8 in. shank, modified fish tail-point
  • Length - 1.5 in. 0.010 in.
  • Diameter - nominal"  0.0005 in.
  • Shank dia. - 0.1250 in. (3.18 mm) +0.00, -0.0002 in.
  • Max runout (TIR) - < 0.0005 in.
  • Max. depth of cut - EFL varies by diameter 0.005 in.
  • Material - solid submicrograin carbide
  • Ring Set - 0.800 in. 0.002 in. (optional)
  • Operating RPM - CNC certified operation 20k RPM to 100k RPM
  • Go to: Feeds & speeds



  • Modified 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 milling cutter.
  • Optimized cutting edge geometry (shell / stone cutter) designed for efficient debris removal and smooth side wall formation



  • Mother of pearl logos for musical instruments
  • Pool cue inlay parts and pockets
  • Pool table sights
  • Custom cabinetry
  • Intarsia
  • Ceramic tile, marble, and soapstone shaping and carving
MOP Sharp PointShell Tip

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FAX:  866-453-8473
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Updated 10/10/2016 11:07:23 AM