When it comes to improving your CNC milling, you will want to optimize both your depth of cut and your stepover. A depth of cut is simply the length of the sides of the flutes that do the cutting. Cut width is known as a stepover and it’s the total thickness of the cut when viewing from above. Material Removal Rate is what we are trying to optimize and it’s calculated by multiply the Axial depth of cut by the radial depth of cut by the feed rate.
- Depth of cut is simply the length of the sides of the flutes that are doing the cutting. Cut width is the thickness of the cut.
- When you are roughing you want to optimize the material removal rate. This removal rate is a function of the tool shape, depth of cut, stepover and feed rate.
- The formula for a typical MRR calculation is Axial Depth of Cut times Radial Depth of Cut times Feed Rate. Both depth of cut and stepover have a major affect on machining time.
“If you can get a higher Material Removal Rate, you can shorten the machining time.”