O-flute Corner-radius Single Flute 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)
One of the recurring complaints about O-flute tools, is that the high chipload results in "swirl marks" in the bottoms of pockets. For most applications, this is not a problem but, in the case of side-lit transparent acrylic panels, these artifacts can severely impact the quality of the engraved image. Our radiused O-flute tools virtually eliminate these cutting marks, yielding a smooth, near specular bottom finish.
- Geometry - O-flute®, 1-flute, up-cut, center cutting
- Length - 2.5 in. ±0.010 in.
- Diameter -
nominal"±0.002 in. - Corner radius -
nominal"±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

Diameter | LOC | Flutes | Corner Radius | Coating | Shank | OAL | Depth Rings | Reviews | Part Number | Price | |
---|---|---|---|---|---|---|---|---|---|---|---|
0.2500" (6.35mm) | 1.00" (25.40mm) | 1 | 0.050" (1.27mm) | 1/4" | 2.50" (63.5mm) | Available | MP104-2500-100FR |
$35.51 |
0.2500" (6.35mm) | 1.00" (25.40mm) | 1 | 0.050" (1.27mm) | ZrN | 1/4" | 2.50" (63.5mm) | Available | MP104-2500-100FRC |
$40.81 |