LMT Onsrud 63-610 Solid Carbide Upcut Spiral O Flute Cutting Tool, Inch, Uncoated (Bright) Finish, 22 Degree Helix, 1 Flute, 2.0000" Overall Length, 0.1250" Cutting Diameter, 0.2500" Shank Diameter

Performs great

I just finished making some parts for my 3d printer out of aluminum and it was flawless. Went extra slow to see what it could do. I started with contours at 50mm a min, then went to 100mm a min with no problems. Plunging for holes went at 40mm a min with no chatter at all. was very impressed with this bit. will have to get some more for different cuts

It done a nice cut on 3mm ACP, I tried a 30mm test cut and it came out beautiful. Then I ran a gcode test pattern and broke the bit about 15mm in the cut. I was trying a new gcode sender at the same time, which may have been my mistake, not the bits fault. Pretty sure I was at same speed as test cut though. Debating if I should try ordering again, but pretty expensive at that rate. Will be $100cdn down the drain if it is so brittle.

Using in a DIY CNC. Cuts aluminum better than all my other endmills. Plunges well and does deep cuts well. Would love if they sold more of their cutters on Amazon. One note: I clean my endmills and parts in isopropyl alcohol and the endmill got spots on it after I let it soak overnight. Weird looking but still cuts well.

Très bonne qualité de bit. la coupe reste très longtemps. je coupe du laiton avec cette bit.