Speed & Feed Calculators and Common Formulas

Speed & Feed CalculatorsSpeed & Feed Calculators

Dapra's Speed and Feed calculators will automatically provide the necessary speed and feed for your application. Click on the desired product line to begin:


DAPRA Speed/Feed Calculators
Tool Line
EDGE2 SBN
EDGE2 DTB
Ball Nose
RHINO-FEED
Toroid
Square Shoulder

Common Formulas for Milling Operations

Download these formulas as a printable PDF file (100k).

Variables (Abbreviation)
Speed – Surface Feet per Minute (SFM)
Feed – Inches per Minute (IPM)
Feed per Tooth (FPT)
Adjusted Feed per Tooth – Chip Thinning (AFPT)
Feed per Revolution (FPR)
Depth of Cut (DOC)
Width of Cut (WOC)
Tool Diameter (D)
# of Teeth in Cutter (Z)
Metal Removal Rate – Cubic Inches per Minute (MRR)

For lead angle (chip thinning) and effective cutting diameter compensation, see corresponding tool reference page / catalog.