Dapra's high-performance 90-degree Square Shoulder cutters work best when allowed to perform within their designed operating parameters. Adhering to the following steps will ensure that you are getting the most from your investment.
After determining the percentage of WOC for the tool diameter, multiply the desired feed rate by the corresponding factor shown in the chart. This will be the Adjusted Feed per Tooth (AFPT) resulting in a true chip thickness of the desired amount.
If using a 1" dia. end mill @ .100" WOC, the WOC = 10% of the cutter diameter. Using the chart above, the factor for the chip thickness = 1.7. If a chip thickness of .005" is desired, a feed rate of .0085" (.005 x 1.7) should be programmed into the machine tool.
Adjusted Feed per Tooth (AFPT) = desired chip thickness x chip thinning factor (from chart).