Quote:
Originally Posted by A930Rocket
Finished the first hub. What’s causing the chatter with the flat cutter on the backside? I used lots of cutting fluid. The RPM’s were as low as I could go. Maybe it needs higher RPM’s? Of course, I only have a drill press, no CNC machine.
I’ll probably go with the .4995 reamer on the next one. I used the .4990 on this one.
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Are you using a counterbore tool to surface the flats? A 4 flute end mill can work quite well in a pinch. Chatter is usually from lack of rigidity but changing the tool geometry can sometimes help. Lower RPM would likely be better.
Without knowing what material that hub is I would not weld it at all, the flat section does not have to be 100%