Originally Posted by
MychesterCNC
Yes, but will a slow speed in itself cause major problems? I'm not looking for efficiency, I am already expecting to take of minimal amounts at a time, I'm wondering if the fact that the wheel will only turn 200 rpms or so will cause some obvious problems that I'm not aware of yet...?
Thanks!
You want a cutting tool to cut and running a SFM that is to low will cause the tool to rub rather than cut. With a tool of any material if it isn't cutting then excessive heat is being generated. Excess heat will cause the tool tip to overheat and break down. Surface finish will suffer and some materials will harden. The excessive heat in the work piece can cause it to move after it cools leading to run out. The heat can cause the part to grow so after cutting it to dimension it will shrink after it cools, how much depends on a few factors, material; temperature; how deep the heat has soaked into the work piece; etc. The idea is to cut at a recommended SFM range based on work piece and tool material, RPM is how you achieve that SFM, so that heat is carried out of the cut to allow the tool bit tip to remain at a temperature that it is stable and below it's plastic state temperature.
Suppose you were an idiot and suppose you were a member of Congress. But I repeat myself.
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