Freebie Milling Feeds and Speeds Calculator

[HimyKabibble]

Here's a version that does metric. If the units aren't right, let me know. The only "oddity" is that the nominal chipload is still in inches/inch. mm/mm just doesn't make any sense....

Regards,
Ray L.

[aarggh]

Too good Ray! The mm option is great, I can see why you probably wouldn't want metric for everything, as sometimes it just doesn't seem to be as cohesive for some aspects, but as most of the cutters and collets I use are metric, it makes it just that much easier to input.

I'm curious about the chip thinning option, and the spindle power in the calculated values, does that have no relation to the machine parameters input?

cheers,
Ian

[Flenser]

Pretty nice. For those few end mills I'm used to using the calculator's final feed rate was very close to what I eventually arrived at through trial and error - and broken end mills.

On entering numbers in the edit fields, I noticed you can't enter a decimal value that starts with the decimal. You have to enter a zero first. For example, entering ".25" becomes 25.

[dneisler]

Seems to be a issue still for the textboxes, you can't type ".375" in or anything with a "."

Highlight text in a text box and try to replace with ".375" and it will just put in "375". You have to go back manually and put in the "." a second time.

[HimyKabibble]

Too good Ray! The mm option is great, I can see why you probably wouldn't want metric for everything, as sometimes it just doesn't seem to be as cohesive for some aspects, but as most of the cutters and collets I use are metric, it makes it just that much easier to input.

I'm curious about the chip thinning option, and the spindle power in the calculated values, does that have no relation to the machine parameters input?

cheers,
Ian

Ian,

Chip thinning is a function of radial engagement, and applies only when radial engagement is less than 1/2 the tool diameter. Max HP and Max RPM are used only to warn you when you've entered parameters that exceed the spindle power or RPM of your machine. The Spindle Power and RPM boxes will turn red if this happens.

Regards,
Ray L.

[HimyKabibble]

Pretty nice. For those few end mills I'm used to using the calculator's final feed rate was very close to what I eventually arrived at through trial and error - and broken end mills.

On entering numbers in the edit fields, I noticed you can't enter a decimal value that starts with the decimal. You have to enter a zero first. For example, entering ".25" becomes 25.

New version below, with that fixed. Thanks!

Regards,
Ray L.

[osphoto]

Thank you for the Feeds and Speeds calculator.

I don't mind paying for something that works and lets me use it when I want to use it.

Since GWizard was mentioned. Having to login to use his product is nothing but a tracking scheme. And I find it rather funny the folks have bought into his scheme of subscription base and He gets to track you when ever you use his product.

I've tested the gwizard product, worked OK, but the force of logging in all the time was just annoying and I felt he didn't deserve my funds for such pettiness. Same goes with his new gcode program. Need to have a subscription to use it.

Ray, thank you for donating your time and efforts in producing a feeds and speeds calculator. Setup a paypal donation and I'm sure you'll get plenty of support.

[cadcamsa]

good day
thank you for offering your speed and feed calculator.
regards
CadCamSa

[Bubba]

Ray,
I like it! Simple, easy to use,
Thank You.

[cncdan]

Thanks Ray, I was looking for a basic calculator to determine a starting point aluminum ...I've been doing these calculations long-hand for years at work for various materials, I like the required HP feature - never really needed it using a 15hp VMC, but with my 1hp Emco... it helps!
One thing that should be corrected is the units for Chipload - It should be a measure per tooth (in/tooth or mm/tooth).
Also, if possible, on a future release, can you add an option to allow the user to create their own custom material or tool parameters so that a different SFM can be specified.

[HimyKabibble]

One thing that should be corrected is the units for Chipload - It should be a measure per tooth (in/tooth or mm/tooth).

I think you're not understanding what that parameter is. Think of it more as a normalized chipload. Chipload has to be scaled based on tool diameter. Larger tools can handle much larger chiploads than small ones, so this is the parameter that more-or-less gives me the "chipload per inch of tool diameter". So, the inches/inch units are correct.

Also, if possible, on a future release, can you add an option to allow the user to create their own custom material or tool parameters so that a different SFM can be specified.

You'll be able to do FAR more than just that....

Regards,
Ray L.

[cncdan]

Yeah now that you mention it, I forgot about that. I looked up the formula for feedrate that I learned in school... looks sort of like what you've described :
Feedrate = RPM x #flutes x chipload/tooth{in/tooth} x tool diameter (only for tools under 1").

However, nowdays I usually use tool manufacturer's diameter compensated recommendation for the tool diameter that I am using (so I kinda forgot abouth the other formula). At the last place I worked, we used Niagara Cutter tools almost exclusively and I found their recommended SFM & chiploads that were already diameter compensated, were usually right on the mark.
Solid Carbide Speed & Feed