Drill Speed and Feed Tool

Author: John Thornton

Download: drill-speed.py

This tool helps you to calculate the speeds and feeds for drilling.

Instructions

Select a material to get the SFM Range (Surface Feet per Minute)
Enter the Drill Diameter and RPM
Press Calculate to see the results
Start with speeds that are in the low end of the SFM range
Using Chip Load per Inch of Diameter of the drill bit keeps the load even as you change diameters. Default is 0.012.