Machine Shop Math - How to calculate spindle speed
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- เผยแพร่เมื่อ 8 ธ.ค. 2020
- @GCodeTutor talks about spindle speed and explains how to calculate the correct speed based on your tool characteristics, workpiece material, and cutting feed.
Feeds and speeds are some of the most important, yet basic parameters of any give application within a machine shop. No matter how advanced your machine tool is or sophisticated your cutting tool is - if you run a program using the wrong feeds and speeds you'll always end up with the same result: a scrapped part (and likely a broken tool).
It is important, therefore, to understand how to calculate those parameters and how to use those calculations to improve your efficiency and productivity.
Spindle speed refers to the rotational speed of the machine spindle and it's measured in RPM (revolutions per minute). Calculating the spindle speed (N) is pretty simple but in order to do so you'll need to have the following information handy:
V = Cutting speed (typically provided by the cutting tool manufacturer and depending on the material being machined).
D= Tool diameter
Once you have this information, all you have to do is apply one the following formulas (depending on what measurement system you are working with):
Imperial system: N = (V*12)/(π*D)
Metric system: N = (V*1000)/(π*D)
To learn more about machine shop math, visit Gcodetutor.com (rb.gy/7yzqfn).
Stay tuned for more machining videos!
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Fanuc CNC Custom Macros - amzn.to/370yX0P
CNC Programming Handbook - amzn.to/2MPxT9g
CNC Programming Techniques - amzn.to/3aTS4el
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#machineshopmath #CNCmachining #metalworking - วิทยาศาสตร์และเทคโนโลยี
Try 4 as a constant times the cutting speed divided by the diameter. (4X50 /dia) Much easier to remember. Taught it that way to my students for decades. This assumes HSS tool. Carbide is triple.
N=3.83xSFM/Dia is much more simplified.
what about the feed formula?
Marc Spector?
An easier method for metric calculation is Cutting Speed x 318, then divide by diameter.