- October 16, 2017 at 6:58 am #46074
I was cutting some wood and plywood with 1 flute simple bit and it was working fine.
Some time ago I found that people prefer Diamond Bits for the plywood because they produce more clear cuts on the top. I tried a couple of bits (3.17, 2.4, and 2.1) but comparing to 1 flute 3.17 I am getting serious vibrations.
Do you have any quess what is the reason and what am I doing wrong?
My build is quite stiff, every single bearing is really tightened. But on these bits I am having very serious vibrations. The top of the part is better (no hair), but the cut itself is having slight wobble. (on the screenshot below left was cut by 1 flute, and right ones is Diamond 2.1mm)
Sorry no luck to embed the video from YouTube – Video shows sound I get. Some resonance?
Attachments:October 16, 2017 at 8:04 am #46084
Is the diamond bit a 2 flute? I think you just need to slow down your RPM’s, or cut deeper per pass.
Do you have a link to the bit, I’m not sure what it is.October 16, 2017 at 11:42 am #46099
Ryan, so sorry, due to some reason thought these are called diamond bits, but these are CORN type bits!
Just noticed that price is a bit…mmm.. cheap, even for chinese made)) But the geometry looks fine
Do you think what you said above could be right for these bits?
P.S. I think I had around 10 000 RPM, and 1.5mm depth that timeOctober 16, 2017 at 6:02 pm #46148
Those are drill bits, best for pushing down into wood and not so good for pushing sideways.October 16, 2017 at 11:54 pm #46157
Hmm.. Are you sure you are looking at the right link? (or you’re referring to the name Chinese decided to give to the goods?)
They do not look like a drill ones. I’ve heard they are used for the brittle materials like PCB, Carbon, and Plywood
Attachments:October 17, 2017 at 3:50 am #46166
I wouldn’t use those for plywood, they’re really made for pcb(fiberglass) or carbon fiber panels. The ones you linked to will gum up with wood and glue. Plain old 1 or 2 flute endmills work best for plywood. Plywood really is a shitty material to cut no matter what though. The glues they use are really hard on the end mills.October 17, 2017 at 6:08 am #46168
Seems like I will forget about these, and will contunue to deal with 1 flutes… (and sleep well)
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