Why is the reaming speed kept slower then the drilling speed in metal machining process?
I think you have this backwards
The surface speed for Carbon Steel Tools Reaming Mild or Soft Steel is 70ft/min
The surface speed for Carbon Steel Tools Machining Mild or Soft Steel is 40 to 50 ft/min depending on tool type.
Feed rates are still higher for reaming. For a hole over 1/8″ diameter the rarte is 0.010″ per revolution for Reaming and from 0.0035″ to 0.006″ per revolution for machining with a twist drill.
Niel