@2:03 Why is the cut deeper when workpiece RPM is slower? Plunge speed is the same, then the cut deep is the same, and slower RPM makes the chip smaller?
its a brain bender... try and picture it as gears. if the grindstone is spinning faster than the work, its drawing an arc through the work. vice versa, if the work is turning faster, its the work drawing the arc through the grindstone. only when two gears are the right size and pitch do they contact at the ideal pitch line... obviously the stone is spinning much faster than the work. the difference in arc length is minute but its there.
@2:03
Why is the cut deeper when workpiece RPM is slower?
Plunge speed is the same, then the cut deep is the same, and slower RPM makes the chip smaller?
Because the depth of the plunge will be more per each rotation of the work piece since it is moving slower.
its a brain bender... try and picture it as gears. if the grindstone is spinning faster than the work, its drawing an arc through the work. vice versa, if the work is turning faster, its the work drawing the arc through the grindstone. only when two gears are the right size and pitch do they contact at the ideal pitch line...
obviously the stone is spinning much faster than the work. the difference in arc length is minute but its there.
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