Heavy Turning in the American Pacemaker

foreign [Music] hey guys welcome back to the shop today we are going to go ahead and put our American pacemaker through a little test turning over here I have this this old used gearbox shaft in there that we can use to turn it in the chips this is a shaft that I made a pretty good while back it's for a vertical output gearbox and I had saved this old shaft you know this is typically stuff that you would either cut up and use for other parts or when you're in a a fast-paced shop with a lot of stuff coming and going this kind of stuff usually ends up in the scrap bin and gets sold to scrap but I saved a few of these old gearbox shafts so that I could use them for things like this over the years either cutting them up and reusing them or making some chips out of them like that so that's going to be a great test piece here for the American pacemaker because what I'm going to be doing here is replicating the stain type of cuts that I took previously on the other American pacemer American pacemaker that I used to run all right I have two different turning tools that we're going to be used this is all roughing we're not going to be doing any turning and finishing we're just going to be rough turning okay I have a couple tools I'm going to use we'll go ahead and show you what we got the first one that we'll start with both of them are is car by the way this is the LM Ln MX sometimes it's hard to say that but the lnmx insert right there and then we have another one that's the comg insert we'll go down and look at the inserts there 10 inch diameter we're only going to be turning just this section right here because once you get into this journal here which is where the ring the gear went I believe this is where the gear was shrunk on you have this keyway there and you got to be careful going through these interruptions like that because it just tears up tools so we're really just going to be focusing on turning a section right there because I want to do some heavy metal removal rates we're talking you know quarter inch of pass quarter inch depth per pass or let's just try to get up to half inch metal removal and then we'll go up to 20 to 22 000 inch per Revolution and we'll kind of sneak up on it to I haven't tested the pacemaker yet for any of those kind of heavy Cuts so I don't know what to expect but hopefully everything's in order there's no good not going to be any problems with the feed box or our feed mechanisms over here so we're going to find out I'll show you the other tool that we're going to be using and that is this guy right here so the tool that I just showed you there the LMX and then this guy right there which is actually a CO mg insert those are the two primary tools that I used to use to rough in those big gearbox shafts same exact tool matter of fact that insert that's on there turn some of those shafts because I it was still on there I went ahead and indexed it so that's the inserts for the comg just like a cnmg except it's a little bit bigger but that's more of a proprietary shape of this particular insert the way that they they actually have these made it's kind of made a bit of an angle so that when it when it gets pulled up into the pockets it kind of locks in it can't really lift out because of the way that the insert is molded on the sides this is the LMX insert it's one of the on edge inserts that stand up but the way that this insert right here makes a chip is my personal favorite insert whenever you're doing heavy roughing the chips that you see at the beginning of my videos and that intro card are chips that are made by an lnmx insert this guy right here this is a pack that I got off of eBay a long time ago and I haven't used them up this pack I've had for probably I don't know 10 years or more probably longer than that because I've had these I've had these longer than the life of my YouTube channel so I don't know 12 15 years old now I've had those and you see how many I've gone through four inserts all that time is all have used turn all those gearbox shafts that I used to turn those four inserts so a pack of this kind of stuff truly will last you a long time if you take care of them so both of them the minimum surface speed this one's listed at 460 up to 10.50 this one is 500 to 1150. let's let's use the lower end of the spectrum because I don't want to run this super fast so let's just say 500 surface speed is what we're going to calculate that is a 10 inch diameter Journal that we're going to start with divided by 10 and we're going to multiply that by 3.82 so it's calling out a RPM of 191 so we'll find something around that range 191 looks like it's going to be 203 or 174. how about we select 203 and we'll give that gear range a try and of course we'll have to speed it up a little bit probably as we get into some more cuts we'll start off kind of uh light on our feed but kind of bump it up to where we're moving about 20 22 thousands per rev let's see what it says the LMX is good for ten thousandths up to twenty three and a half thousands per Revolution or inch per Revolution and then the CNN comg is 12 up to 31 and a half inch per Revolution so you can really really feed hard with that guy right there this is the one that'll really really move some metal so let's give it a try let's see what the pacemaker can do I am going to be running my uh noga mini cool on this guy this is exactly how I had it set up on the previous pacemaker got to turn you just turn it on and I got it blowing right there down towards the tip of that insert that'll help preserve the life of the insert and help keep it kind of cool it's not a replacement for flood coolant but this actually works really well so let's give it a go shall we our first cut is going to be a hundred thousandth depth to cut 200 thousands total metal removal and we're set at fifteen thousands per Revolution and we are running I got it in the 203 gear range let's give it a go I am using my uh hearing protection because usually when you're turning this kind of stuff it squeals on you put our Nova cool turn it on I mean here we go [Music] all right so we already burned up that insert right off the bat you know that might be the uh I'm not I'm not sure last time I tried to use those inserts that the same thing happened toll burned up I hate that our first test is starting off with absolute failure right off the bat and I don't I don't understand this should not be happening because these These are IC 8250 which is your grade which is rated for steel and stainless it's the grade that I've always used but these inserts here and the tool that I'm using right here are some that I bought off of eBay the LMX tool that I had used in the past is a different so it wasn't this exact tool this is just some extra ones that I had bought so I'm not understanding why the insert is burning up because like I said I tried to use this before on another job and it kept burning up the insert right off the bat that guy right there we're gonna give it another try you got two more two more corners there to use and see if we can get it to work I shouldn't be running I'm going to double check my speed but we shouldn't be burning it up that fast supposed to be running on the low end of the surface speed all right next attempt I've lowered it to 174 on on the RPM I just want to go back into this cut so far so good I don't like the chips fine chips you need a we need a deeper cut foreign with that particular insert I mean it's cut it's making fine chips but they're pretty fine and they're popping everywhere what you ideally want is a nice big heavy fat chip that's going to curl over and go straight down that way what we'll do is we'll do this again we're going to go up to our 20 thou I'm sorry 20 000 inch per Revolution kick our feed rate up and see if it'll help break up break off a better chip we'll go 250 thousandths on this next pass okay next pass quarter inch metal removal 20 thousands per Rev I can't even get the camera to stay in place I'm going to start that cut again but it seems to have a lot of vibration [Music] thank you my my mister was starting to move I had to stop everything so let's uh let's finish this cut back in there no we've already burned up the insert that's part of the problem right there I am just uh I'm just failing left and right on this first test here another burned up insert sure enough so I indexed that because we've got one more good Edge on that we're just I don't have any confidence in it now but we'll just go ahead and run it till it burns it up I'm gonna slow it down that was 150 now we're going to run 126. it just seems like it's the surface speed just seems like it may be that's what's getting the insert I don't know yet but let's give it another shot and if it fails again which I'm sure it will we'll move over to our comg tool let's see how it likes this slower speed here I sound a little bit better there it's looking better too sounded pretty good as well all right so that did better even though we're lowering our surface speed that seem to be doing better so we still got a little bit of metal there I'd like to take another cut because that can handle a depth a a larger depth of cut there okay 300 thousands total so 150 depth of cut 20 thou feed rate that's looking better all right what I have to do sometimes is when you first start that cut there's not enough material there and Tool pressure to get that chip to break and it wants to string up on you so sometimes what I do is just stop it and try to knock that off out of the way like that now it should break a chip soon as it goes right back into the cut there hey what a little bit more juice that's looking mighty good right there they are popping out here on me though boy they are going everywhere you guys hear the lathes it's working pretty hard thank you [Applause] so our lever to disengage there [Applause] foreign so that's doing better I'm I'm gonna assume that our first couple of cuts we're burning up our insert because the surface speed is just too high maybe the uh the hardness of this steel is just too much for that speed there and it's getting that tip but it's definitely doing better now but you guys can see the chips we're starting to get into those uh that shape of the chip that's that I really like but we're still getting a lot of them popping up out here which is that's just part of the game we'll go ahead and run a couple more tests on on that insert I can definitely hear a load in the machine but it sounds just like it should when you're taking that kind of removal rates off a big piece of Steel like that that's a lot of metal that you're taking off so it really puts the machine under a load but it should handle it just fine hopefully I'll try you guys up here on the tail stock see how that works all right so this is uh 400 000 total metal removal we're going to be just skinning this little area here before we get into our cut and 20 thou feed rate foreign ister I hate those little light Cuts Like That probably stop it and get rid of that before we get into our heavy cut all right let me regroup here get rid of those chips all right go for it again now I may have to stop this and adjust our feed rate it act like it was wanting to string them let's see we're getting right at the maximum of what this tool can handle it'll handle up to a six millimeter depth there we go no see we don't have enough feed there we did we need to bump it up not enough feed let me make an adjustment all right we went up to 22 thousands which is just about our Max of what it's rated for it can handle up to 23 it says so it says on the package foreign [Music] [Music] [Applause] getting into some chowder not liking it alright so that last cut starting to make some some good looking chips there it seemed like the high end of the feed rate is definitely what you need and that's the same that's what I used to do with those tools there but you can see we're starting to get us some chatter I heard it coming into it and it definitely just would just get worse so we may end up having to bring the uh got the steady rest right there I think it'll hold up to seven inches Max we may be able to just skinniest uh this area here clean and put the steady rest down here here and and run that so that we can continue our testing so maybe from here what I'd like to do is go ahead and swap out to the other tool the comg and we'll do a little bit more turning there we'll we'll maybe use this section here and do some turning but so far the machine itself is doing pretty good seems to be handling it just fine and it sounds just like it's supposed to whenever it's under a load like that so we've swapped our tool over to the comg we've got it touched off we're going to take a total of three hundred thousand I'm sorry not 300. we got it 200 we'll just turn a little bit see what happens and what I was thinking about doing we'll go 200 300 400 and what I was hoping to get was 500 but we may not we may not be able to get that because of the chatter happening right there we're still set at that 126 RPM 200 let's go in another 100 here could be 300 once it catches up and see what a light cut will do it's stringy 300 that's looking good that's actually performing really well and another reason why I use that tool so many times because it always seemed to do really well so we may be having better luck with this guy right there let's do a little more of that 300 cut I'm going to move the camera so you guys can see it a little bit better eating that that's working really good that's what you want right there thank you [Music] foreign real happy with that last pass that was 300 that we were taking off I've got it set to a total of a 400 looks like we're going to be looks like we'll just clear this little shoulder right here so let's go at it again I've still got the feed rate set at the same they'll verify we're running at 22 thousandths per Revolution so this is uh two hundred thousands per side and it should do just as good or even better foreign [Music] [Applause] [Applause] [Music] all right that's doing good so that was our 400 thousandths pass there chips are looking really good I got a couple of good uh photos of that that I can share with you guys at the end of the video definitely making some chips there and they're popping all over the place and really sticking to the bottom of my boots there it's all part of the game though so I want to do one more cut with this guy for now anyway I want to match what I used to turn these guys at which was 500 thousandths or a half inch per pass quarter inch per side on the tool we'll leave our feed rate where it's at I think it's doing really well at 22 thousandths so machine still doing really well I think we've got us a pretty good American pacemaker on our hands here I may go ahead and cut this a little bit get rid of this chattery area so I know that we can take us a uh a full 500 depth of cut there on this this section right here I'm just gonna we just touched off there we're going to turn this at our 500 depth we got a zero set there a little easier to keep up with because you're going to the five and the zero it's 500 so this is a total of one inch per Revolution there so when you're doing those rough Cuts like that it's just really easy to uh know your mark go to it go to Five go to zero go to Five to zero while you're roughing down these uh these shafts but I mean this is a great example what I'm talking about you're starting with a larger piece this being 10 inch you're probably starting with I don't know maybe 11 inch whatever you can get that's closest and you're having to rough all this down to this four and three quarter diameter so it's a lot of removal rate but a lot of removal but if you can set your your feed rates and a depth of cut like this to get a lot of metal per pass you can rough this down very quickly actually all right we'll go ahead and start our cut there now noga cool keeps getting shifted around here trying to get the hose where it stopped pulling on it all right that's looking better there all right here we go half inch quarter inch per side all right looking good [Music] foreign [Music] [Music] [Music] that's what I'm talking about right there love it that was looking good sounding good just like it's supposed to so apparently it was that LMX tool that was causing that unneeded chatter in there a little bit too much rubbing going on that tool always has performed really well I just like the way the chips looked that come off the LMX better but that's still a good looking ship there too that steam that you see or smoke that's just the steam from the cool mist burning on the chips there so what I think I want to do let's make one more cut let's cut this right here same one we just did a half inch start you off with the GoPro and I'll move you out of the way and get in there with my other camera try to get a little better shot of this [Music] [Music] [Music] [Music] [Music] well I hope you all have been having as much fun as I've been having while watching this pacemaker do its thing go ahead and shut her down you can kind of hear that rattling noise here though I'm wanting to try to get into and get repaired and the clutch so I think that's going to be it for our test Cuts today I'm real happy my my main concern was just being able or seeing if the lathe was able to make the cuts without having any trouble with the headstock the Quick Change feed box there or the feed system right here at least on our longitudinal but I'm sure the cross feed is just fine as well so half inch pass 22 thou feed rate that's moving some metal that's making a nice chip and you can certainly turn out a shaft pretty good pretty quickly on a lathe like this making those kind of cuts so our comg insert is a winner again the day I really hate that our l m x is just continuing to fail on us the the other tool that I used to always use which is at the house always worked good but that one that I bought was a bigger insert and I thought it was going to do well too so I don't know what the deal with that is but that tool right there is is performing really well still performing well that's that's an old tool been around a while so good looking chips I've had a lot of fun with this uh turning the shaft today and I wanted to bring you guys along so that y'all could see these first test Cuts firsthand as well and just do a little trial and error and and uh and see what happens there that's a good piece of material to be able to do some tests like this because it doesn't really mean anything you know you can certainly cut that up and make some other parts but for me it was just being able to use it in the lace here to make some chips to test tools test delays and and see how they perform so I'm happy with it it's working really well and I am looking forward to getting some actual shafting in here that we're going to turn into some gearbox shafts or the like and be able to do some big keyway cutting over there and the flex CNC as well so I think we're going to sign off from here I hope you guys had fun watching this tried to get some good fun video for you guys to get in there and see the cutting action see that insert making a chip and I hope that you enjoyed so come on back for the next job and I hope to see you then [Music] thank you [Music] [Music] foreign [Music] [Music]

Channel: Abom79

Views: 144,250

Keywords: Abom79, Machine shop, machining, manual machining, manufacturing, industrial repair, lathe, mill, Cnc, American Pacemaker, heavy turning, heavy roughing, gearbox shaft, iscar, comg, LNMX, Noga, Noga mini cool

Id: bxc-gAcB2wo

Length: 37min 41sec (2261 seconds)

Published: Sat Aug 19 2023