Milling Speeds And Feeds Calculator: For Improving Productivity

Easily Calculate SFM, RPM, and Feed Rate

This calculator is a tool. These calculations are based upon theoretical values and are only intended for planning purposes. Actual results will vary. No responsibility from 6gTools LLC is assumed.

Need Help?

1) Cutting Tool Information

Unit Type	Tool Diameter		# of Teeth
Tool Material		Tool Coating

2) Material To Be Cut

Material Group

Material Family

3) Cut Information

Radial Depth of Cut (In Inches)	Length of Cut (In Inches)
"Radial Depth of Cut" cannot be larger than 50% "Tool Diameter"

4) SFM Calculator

Cutting Speed Surface Feet per Minute (SFM)
Low Range	High Range	Your Speed

5) SFM to RPM Calculator

Spindle Speed Revolutions per Minute (RPM)
Low Range	High Range	At Your Speed

6) Feed Rate Calculator

Feed Per Tooth Inches per Tooth (IPT)
Low Range	High Range	Your Feed
Feed Per Revolution Inches per Revolution (IPR)
Low Range	High Range	At Your Speed and Feed
Feed Rate Inches per Minute (IPM)
Low Range	High Range	At Your Speed and Feed

7) Cut Time Calculator

Duration (in seconds)
Low Range	High Range	At Your Speed and Feed
Duration (in minutes)
Low Range	High Range	At Your Speed and Feed

Milling Calculator Instructions

General:

This calculator is designed to coincide with standard feed and speed charts for various materials and carbide end mills. In the future we will be adding data for HSS and cobalt end mills.
Therefore the diameters that are presented are the most common diameters in the range of 1/8" - 1" and 3mm - 25mm.
Your job is to fill in the Blue boxes,
The Green Boxes are calculated.

Section 1: Cutting Tool Information

Choose whether you are working in inch or metric units.
Choose the diameter (DIA) closest to the specific one you are using.
Choose the number of teeth (N) (flutes or cutting edges).
Choose the cutting tool material. Currently this is just carbide. HSS and Cobalt materials are coming soon.
Choose the tool coating.

Section 2: Material To Be Cut

Choose the material group you are machining.
Choose the material family from that group.
Data from section 1 & 2 will be used to calculate the surface speed.

Section 3: Cut Information

Enter the radial depth of cut (RDOC). The maximum number can 1/2 of the DIA.
Enter the length of cut (LOC). This is optional. It is used to calculate the cutting time.

Section 4: Surface Speed (SFM) Calculator

The speed ranges in surface feet per minute (SFM) or surface meters per minute (SMM) have been calculated.
Choose your speed from that range.

Section 5: RPM Calculator

This section is calculated from Your Speed selection in section 4.
Check the revolutions per minute (RPM) to be sure that it doesn't exceed your machine limit. If it does then reduce Your Speed in section 4.

Section 6: Feed Rate Calculator

Choose Your Feed from the range given.
All other boxes are calculated from this point.