Slitting Saw CNC Speeds & Feeds!
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- čas přidán 5. 09. 2024
- We tried using a slitting saw years ago and, well, it didn't go well! Let's try again using "real" math for speeds & feeds! Taking a quick look at a basic formula, let's see how it parts of a piece of 6061 aluminum!
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Links for this video
Tormach Slitting Saw: bit.ly/1KnajpF
Tormach Saw Arbor: bit.ly/1T9o52T
Scotchbrite Wheel: ebay.to/1wbzv7m
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Reach us / CNC Info:
Speeds & Feeds: provencut.com
Download Fusion 360: www.dpbolvw.ne...
Online Fusion 360 Training: bit.ly/LearnFus...
Hands-On CNC Classes: www.nyccnc.com...
SMW Products: saundersmachin...
CNC Resources: www.nyccnc.com
Music copyrighted by John Saunders 5 Reasons to Use a Fixture Plate on Your CNC Machine: bit.ly/3sNA4uH
You said in the video you were not climb milling but you most definitely were.
I just received my recent Tormach order yesterday. I wish I knew they had a slitting saw. I started to look around on their website to see what else I might want, but I was relieved to get out of there for under $100 this time. That's unprecedented.
I have a slitting saw that I put in a TTS arbor, but using a slitting saw in an ER-20 collet is probably a big no-no. The version shown in this video looks much more secure, even though it's retained in the modified R8 TTS collet.
I love videos like this. A quick tip, complete with speeds and feeds for the tool. Bonus! The formulas and XLS file! Sweet! Thank you!
I'm now a Patreon patron of the machining arts! Huge benefit to me at a very low cost. Hey, it's a lot cheaper than all of the machining tools I've been buying! :-)
PS - I owe you (and the rest of the CZcams small shop machining community) a tumble finishing video. Soon!
There's a couple pretty big caveats to all of this. One of the big ones occurs when you neglect to bring your milling spindles horsepower/torque curve in, particularly in combination with large cutters on hard materials. It's also a good idea to consider radial chip thinning in your equation, as it's often taken to a huge extreme. Nice video, you've stumbled onto one of the great secrets of prototype machining..
Funny I just bought a slitting saw for a project,, just arrived last week. Great timing, thanks for all you do, going to watch video now!
NYC CNC My intent is a Shift lever for Motorcycle... So basically need some relief to allow for compression with clamping bolt. You had a video a few months ago where you made something similar but you used your cut off saw if I remember correctly.. Funny thing is that video is all I needed, when it (saw) arrived I looked at it and said to self, how the heck do I figure what to spin this thing at? Turns out KISS, all the same rules apply... I plan to use it for parting as well.
Great informative video John. As usual.
The Patreon site is a great idea! I have been enjoying your videos since the beginning - for free. All past and future enjoyment and education is priceless, but I started by pledging the cost of a Starbux. $5 a month for all of the enjoyment and entertainment that I receive from your channel is the bargain of the century. Done!
NYC CNC In my opinion your normal videos, Wednesday Widget series, etc are so valuable that I feel guilty only pledging $5/mo. The CAD/CAM models are just icing on the cake.
When I'm craving more DIY or Arduino videos from you, I have to remind myself that you also have a business to run and customers to keep happy. I know that creating these videos isn't easy, or quick (and expensive too if I think of the time spent in terms of billable time).
There are probably hundreds, if not thousands of us who live vicariously through you and your channel. Keep up the great work!
Just exactly what I was looking for. Thanks
John, If you do another video on slitting, please over-emphasize caution while climb cutting with solid carbide saws. I had one grab the part and shatter on me, slinging fragments. They luckily were embedded into a wall and no one was hurt. I never had a problem conventional cutting for years after that incident.
NYC CNC Yes, I agree and the blade was only .030.
I got a slitting saw for my Grizzly mill some months back. First time I used it I crashed the thing and seem to have ruined the arbor. Maybe I will give it another try. Thanks for the video.
cerberus Obviously you'll keep an eye on the concentricity, since you've had a bump. But a slight wobble will just give you a wider cut. Make sure you push cut by the way, don't climb it.
NYC CNC I will not be wasting any time on that arbor. I will just get a new one, they are cheap.
wordreet no climbing, getting a new arbor so it should not wobble.
We usually turn up our own in house. Our biggest s/saw is 100mm diameter and 5.5mm thickness for cutting fins in a customer heat-sink. Actually, it's technically not a saw, it's a side and face slot cutter with alternating offset teeth, each one having a precision ground cutting edge on one side as well as the tip.
I've just butchered my 1/8 disc cutting mild steel :( Any chance of sharing that spreadsheet you were using for feeds/speeds? .. rather than starting one from scratch. It looks better than any of the calculators I've seen so far.
John, is there anyway of not ending up with the "nub" on the part? I mean it seems kind if ironic or even primitive, that you are making such a small part to within maybe .0001 and then taking it over to a bench grinder and plunging it in by hand to remove the nub. If RPM's were increased and feed rate decreased would it have less of a tendency to leave that nub?
Another great video by the way!
PS: Be nice to hear your opinion on some of the comments about "climb milling/cutting" with parting saw!
Count me in. Just a small voluntary price to pay for all the knowledge you've given me! Thanks John :D
Thanks for the upload. Must try one out
NYC CNC All work on aluminium. Lots of small parts and indeed band saw to cut off.
Hi John,
I just saw your single treading tool example and took the same idea and made a slitting saw with arbor as one of my tools. Have you tried designing a part in HSMWorks that needs a slit and actually slitting it? I just don't seem to be able to figure out how to do it . . .I think it would make a cool vid . .joining 2 of your tutorials into one
keep up the great work . .have been following you since around since 2010 . .good to see you living your passion.
John Cameron
Patrean Supporter
+NYC CNC
I used your tutorial to make a slitting saw on a 1/2 arbor for my CNC Mill. I am having trouble generating tool paths to use it. I thought that maybe there was something I am missing. When I try to slit, the saw moves through the material stock from above rather than passing to the right of it and then making multiple cuts to get to final depth. I saw you used a slitting saw to cut a small part, did you model that up or just "conversation it"?
thanks John
Try to cut stainless steel 17-4? I am having problems with feeds and speeds. I am trying to make a .160 thick .440 width and 1.140 length part, I am trying to make a cut of .080 and 1.040 deep. I can cut it but my slitting saw wont last long, I only make 7 parts per saw I am using S400 RPM and Feed .5 on a Fadal CNC Mill.
I was hoping you'd set up a patreon! Awesome!
NYC CNC Yeah, I kept forgetting to ask if you'd consider it! Originally I was going to suggest Subbable if that gives you an idea of how forgetful I am haha. All these projects have to add up and it's definitely worth supporting.
NYC CNC I'm surprised - check out CGPgrey! Very well made, fast-paced general educational channel. That and CrashCourse
Thats a little scary, what if your part hits the saw and leaves a big nick on it. For very small parts it looks fine but id be scared to ruin my work piece on anything bigger
You did climb mill it, not conventional. Clockwise around a part is climb, counter-clockwise is conventional.
That is partially true. It depends if you are using M3 or M4.
Matthew Diaz Which also depends on if you are above or below the equator.
eformance No that's only for toilets.
Depends on whether you have a left hand or right hand slitting saw.
Don't be too hard on yourself, the important thing is that it worked. For such delicate parts I'd recommend a finer pitch saw so it leaves less of a tab.
Argh! We never climb cut with slitting saws. Either push cut or plunge cut. Even with CNC milling you might not get away with it, but you're asking for trouble with anything else, especially hand feeding.
Speeds and feeds - with no mention of depth of cut? Only telling half the story John?
***** I wasn't having a go at John, I was just pointing out that for speeds and feeds to be relevant you also need to know the depth of cut. You can't have a 2 sided triangle...
These are all things that John has helped to teach me, and I understand that it must be easy to miss out some details when producing his videos. I am sure if he went back and watched his any previous CZcams uploads he would say "damn, I meant to say...". It is just the nature of any creative endeavour.
Keep up the good work John, you have certainly inspired me [and many others] to have a go at CNC...
Hey, a bandsaw beats using a hacksaw...