brought a new 8mm tool bit which is designed for cutting mdf and partical board
They told me kitchen guys run them at 18m/m at 18000 rpm 18mm depth
done lot tests cant find happy medium running on partical board
running on my router tried 3000mm/m -4000 10000 rpm get good chip and finish between 4-6 doc, prob is its biting to hard and finished panels are 2-3mm to small
if i slow it down to between 1600 -2000 mm/m at 4-6 doc it cuts to size but is chattering and gumping up with glue from the material
Is your core tight? Can you wiggle it by the bit with just hand strength, like rock the core forward and backward and see if it comes off a rail. It’s a lot of vibration so stuff can get loose (ask how I know lol).
What’s your stopover %? If it’s more than 50%, it puts a lot of strain on the bit. I just figured that out last weekend, my default was at 75% and my LR4 was loud and shaky. I dropped it down to 45% and it was a lot happier.
Also after writing the above, I finally converted your mm/m to mm/s (preferred unit here), and realized you’re going really fast! 3,000 mm/min = 50 mm/s! That’s twice as fast as I go when roughing and slotting.. then I do like 45 mm/s on that 0.3 mm finish pass (for now still experimenting lol). Try going 20 mm/s (1,200 mm/min) and see, after making sure your core and tool holder are tight. But like Ryan said, that’s a lot of flutes.. single flutes work best at our rpms, so that could be causing the problem too, but would be an easy fix at least
the visiable lines for the steps , cant feel them when running finger over them , evn that tight corner at 1700 i thought it might not cut cleanly , but pretty happy with it
