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.

  • 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
Carbide 3-flute Reach End Mills for Cutting Mother of Pearl, Ablam, Pearlam and Hardwoods
MOP Sharp Point
Shell Tip

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Depth setting ring
Item # Description Unit Price Depth Ring Enter Qty.
MS3I8-0100-006F  0.0100 in. (0.254 mm) 3-flute optimized natural shell cutter, 0.020 in EFL, 0.060 in. max reach   $26.99   
MS3I8-0120-007F  0.0120 in. (0.305 mm) 3-flute optimized natural shell cutter, 0.020 in EFL, 0.070 in. max reach   $26.99   
MS3I8-0156-006F  0.0156 in. (0.396 mm) 3-flute optimized natural shell cutter, 0.060 in. max reach   $21.49   
MS3I8-0156-006FC  0.0156 in. (0.396 mm) ZrN coated 3-flute optimized natural shell cutter, 0.031 in. EFL, 0.060 in. max reach   $24.79   
MS3I8-0156-013F  0.0156 in. (0.396 mm) 3-flute optimized natural shell cutter, 0.032in EFL, 0.125 in. max reach   $26.99   
MS3I8-0200-008F  0.0200in. (0.508 mm) 3-flute optimized natural shell cutter, 0.040 in. EFL, 0.080 in. max reach   $20.24   
MS3I8-0200-008FC  0.0200in. (0.51 mm) ZrN coated 3-flute optimized natural shell cutter, 0.040 in. EFL, 0.080 in. max reach   $23.54   
MS3I8-0200-013F  0.0200 in. (0.508mm) 3-flute optimized natural shell cutter, 0.040 in. EFL, 0.125 in. max reach   $24.79   
MS3I8-0200-016F  0.0200 in. (0.508mm) 3-flute optimized natural shell cutter, 0.040 in. EFL, 0.160 in. max reach   $25.89   
MS3I8-0210-008F  0.0210in. (0.533 mm) 3-flute optimized natural shell cutter, 0.040 in. EFL, 0.080 in. max reach   $20.24   
MS3I8-0230-013F  0.0230 in. (0.584 mm) 3-flute optimized natural shell cutter, 0.060 in EFL, 0.125 in. max reach   $23.71   
MS3I8-0250-010F  0.0250in. (0.64mm) 3-flute optimized natural shell cutter, 0.050 in. EFL, 0.100 in. max reach   $22.46   
MS3I8-0250-013F  0.0250in. (0.64mm) 3-flute optimized natural shell cutter, 0.050 in. EFL, 0.125 in. max reach   $23.71   
MS3I8-0280-013F  0.0280in. (0.71mm) 3-flute optimized natural shell cutter, 0.056 in. EFL, 0.125 in. max reach   $22.11   
MS3I8-0313-013F  1/32 in., 0.0313 in. (0.795mm) 3-flute optimized natural shell cutter, 0.063 in. EFL, 0.125 in. max reach   $15.95   
MS3I8-0313-013FC  1/32 in., 0.0313 in. (0.795mm) ZrN coated 3-flute optimized natural shell cutter, 0.063 in. EFL, 0.125 in. max reach   $19.25   
MS3I8-0469-013F  3/64 in., 0.0469 in. (1.19mm) 3-flute optimized natural shell cutter, 0.063 in. EFL, 0.125 in. max reach   $14.95   
MS3I8-0625-013F  1/16 in., 0.0625in. (1.588mm) 3-flute optimized natural shell cutter, 0.125 in. max reach   $12.51   
MS3I8-0625-013FC  1/16 in., 0.0625in. (1.588mm) ZrN coated 3-flute optimized natural shell cutter, 0.125 in. max reach   $15.81   
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