New Concepts in Milling Handbook
A practical approach and illustrated guide to milling cutter selection and use
<Table of Contents © 1973 Niagara Cutter Inc.
Selection of Speeds and Feeds and Cutting Tool Materials -
A definition of the formation of the chip, chemical composition of cutting tool materials and engineering charts for setting of speed and feed for a variety of materials
Cutting Speeds and Feeds
Machinability Ratings of Materials
Selecting Speed in (SFM) Surface Feet Per Minute
Selecting Feed in Chip Load per Tooth
Selection of High Speed Steels
Selection of Carbide Grades
Cutting Tool Geometry
Cutting Tool Failures
CHART 3 - SELECTING SPEED IN (SFM) SURFACE FEET PER MINUTE
» View Chart
To determine the proper starting point for milling a specific material, use the Machinability Rating from the Machinability Guide.
To make the correct machine setting in revolutions per minute, go down the chart from the surface speed desired column and across the chart from the cutter diameter column. They will intersect at the correct spindle speed.
Example: If the Machinability Guide shows a machinability rating of 100 for free machining carbon steel and recommends slotting at 120 to 180 surface feet per minute, start somewhere within that range depending on the condition of the machine, part configuration, etc. Select 140 surface feet per minute as a starting point using a 6" side milling cutter at 140 SFM. The columns intersect at 88 revolutions per minute.