CNC router bits and carbide cutting tools with tutorials and technical guides

O-flute Single Flute Square Thermoplastic Cutters (MP104) - 1/4 in. (0.2500") shank

The "O" flute geometry introduced more than a decade ago is one of the most efficient flute designs for cutting thermoplastics that has yet been invented. With a high rake angle and relatively low helix, O-flute cutters manage to cut acrylic, polycarbonate, ABS, PVC and a host of other sheet polymers at very high chiploads without raising a burr or fracturing the edges of the kerf. All of this while leaving a remarkably clean surface finish. The real surprise is that this revolutionary geometry also works incredibly well in wood and aluminum.

Manufactured in the USA, every tool is:

  • 100% measured / optically inspected to insure that EVERY tool meets, or exceeds, our published specifications
  • available with depth rings precisely positioned to ±0.0015 in. (0.038mm), virtually eliminating the need for resetting Z-axis zero between tool changes (with bits of same overall length)
  • made from premium grade submicrograin tungsten carbide (HRa 92, HRc 80)

This attention to detail and the use of top quality materials result in tools with dependable cutting characteristics and one of the longest tool lives in the market. Combined with comprehensive customer support, our cutters have become the tools of choice for sign makers, model makers, artists and instrument builders around the world.

  • Geometry - O-flute®, 1-flute, up-cut, center cutting
  • Length - 2.5 in. ±0.010 in.
  • Diameter - 0.2498 in. +0.000, -0.002 in.
  • Shank dia. - 0.2500 in. (6.35 mm) +0.00, -0.0005 in.
  • Max. depth of cut - EFL varies by diameter ±0.005 in.
  • Material - solid submicrograin carbide
  • Ring Set - variable, depends on application (optional)
  • Operating RPM - CNC certified operation 3k RPM to 40k RPM

Carbide O-flute for softwoods and thermoplastics

Diameter LOC Flutes Coating Shank OAL Depth Rings Reviews Part Number Price
0.2500" (6.35mm) 1.00" (25.40mm) 1 1/4" 2.50" (63.5mm) Available MP104-2500-100F


0.2500" (6.35mm) 1.00" (25.40mm) 1 ZrN 1/4" 2.50" (63.5mm) Available MP104-2500-100FC