CNC Machining Reference Chart

This chart can be used as a reference for determining a depth of cut, spindle speed and feed rates based on the tool diameter and the material being machined. These values are based on the use of High Speed Steel cutting tools.

Material / 1/8 / 3/16
Acrylic / 6 / 2000 / .06 / 6 / 2000 / .1 / 6 / .125
Aluminum / 3 / 2000 / .03 / 2.5 / 2000 / .03 / 2 / .03
Brass / 4 / 2000 / .03 / 3.5 / 2000 / .03 / 3 / .03
Delrin / 5 / 2000 / .1 / 5 / 2000 / .1 / 5 / .1
Machinable Wax / 9 / 2000 / .2 / 9 / 2000 / .2 / 9 / .2
Steel / 1 / 1500 / .015 / .7 / 1000 / .015 / .5 / .015
Wood / 5 / 2000 / .15 / 5 / 2000 / .15 / 5 / .15
Feed
In/Min. / Speed
RPM / Depth / Feed
In/Min. / Speed
RPM / Depth / Feed
In/Min. / Depth

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CIM – Appendix Activities – CNC Machining Reference Chart – Page 1