Milling Machine Speeds And Feeds Calculator

2 months by cncdivi

Great news! This page offers two Free Online Speeds and Feeds Calculators.

Take advantage of both HSS Feeds and Speeds with simple shop formulas and a full-featured calculator (free for a limited time) that is the industry leader, used daily by top manufacturers worldwide.

They rely on this software because it saves them time and money.

Why use the basic free calculator when you can try our full-featured G-Wizard Feeds and Speeds Calculator free for 30 days? Download it now.

It takes just 37 seconds to download and start using G-Wizard. It痴 free for 30 days and provides excellent feeds and speeds. After that, you can switch back to our free online calculator.

Take advantage of the high-performance model while it痴 free!

Click on the Version of G-Wizard Best Suited to Your Needs:

Or, use our simple online cutting feeds and speeds calculator below:

Milling Machine Speeds And Feeds Calculator

Spindle Speed Calculator

Tool Diameter
inches

Surface Speed / Cutting Speed:
SFM (see table below for SFM values).

To learn what is SFM and how to go from SFM to RPM, click this link.

Spindle Speed:
RPM

Spindle RPM Formula = (12 * SurfaceSpeed) / (PI * CutterDiameter)

Feed Rate Calculator

Feed/Tooth (Chipload):
IPT (inches / tooth)

Number of Flutes (Teeth):

Feed Rate:
IPM (inches / minute)

Feed Rate Formula = Chipload * NumberFlutes * RPM

Milling Surface Speeds for HSS End Mills
Material	Surface Speed (SFM)
Aluminum - Wrought (6061)	250
Brass	200
Cast Iron - Ductile	90
Cast Iron - Gray	100
Copper Alloy - Wrought	120
Magnesium Alloy	250
Stainless Steel	30
Steel - Mild	110
Steel - Hard Alloy	60
Steel - Tool	60
Wood - Hardwood (For more wood see linked article)	500
Need a Material Not Listed? We Can Help!

Drilling Surface Speeds for HSS Twist Drills
Material	Surface Speed (SFM)
Aluminum - Wrought (6061)	250
Brass	200
Cast Iron - Ductile	80
Cast Iron - Gray	120
Copper Alloy - Wrought	70
Magnesium Alloy	250
Stainless Steel	30
Steel - Mild	110
Steel - Hard Alloy	60
Steel - Tool	60
Need a Material Not Listed? We Can Help!

Milling Chiploads for HSS End Mills
Material	Chipload (IPT)
Aluminum - Wrought (6061)	0.005 - 0.010
Brass	0.005 - 0.010
Cast Iron - Ductile	0.004 - 0.008
Cast Iron - Gray	0.002 - 0.006
Copper Alloy - Wrought	0.004 - 0.008
Magnesium Alloy	0.005 - 0.010
Stainless Steel	0.002 - 0.006
Steel - Mild	0.002 - 0.010
Steel - Hard Alloy	0.002 - 0.006
Steel - Tool	0.002 - 0.006
Note: Chipload should be adjusted for tool diameter. Smaller tools tolerate much lower chip loads! You can look this up in the manufacturer's catalog, or we can help. CNC Feeds and Speeds Chart Wood Not Sure the Correct Value for Your Cutter? We Can Help!

Hang on: You Deserve Better!

Software that makes anyone a better CNC'er... Even beginners:

Better Tool Life, Surface Finish, and MRR with G-Wizard

It took years, we analyzed data from over 250 tooling catalogs,
we built a powerful cutting physics engine
with advanced algorithms that consider
almost 60 different variables, and we
worked with over 50,000 CNC'ers
like yourself to make sure you'd
have the Best Feeds and Speeds.

Improve My Feeds and Speeds For

How to Calculate Material Removal Rate?

To find the highest Material Removal Rate while keeping tool life reasonable, use our G-Wizard Calculator. If you're using the free calculator, check out the Material Removal Rate Formula.

How to Calculate Feed Rate?

Need to calculate feed rate or create your own spreadsheet?

Basic feed rate formulas for milling are simple, but real-world feeds and speeds are more complex. Find all the basic formulas in our free online Feeds and Speeds Course.

More Feeds and Speeds Calculators

Like what you read on CNCCookbook?

Join 100,000+ CNC'ers! Get our latest blog posts delivered straight to your email inbox once a week for free. Plus, we’ll give you access to some great CNC reference materials including: