Disassembling and Cleaning a Three Jaw Lathe Chuck and Machining a New Back Plate

[Music] hello Keith Rucker Village machinery org guys pick my logo I picked up a rivet ten 20s metal aid and when I got it it was really kind of badly in need of a three jaw Chuck it actually came with one she came with two one of them was damaged I'm not sure exactly what happened it was a cheap Chinese Chuck and I just decided that particularly the speeds is that machine runs out I just wasn't gonna take any chances with it typically when you get above a certain rpm or lathe you want to stay away from cast iron Chuck's you want to go to steel body Chuck's the cast iron ones can shatter at high rpms which is never a good thing the other smaller Chuck that was came with the lathe actually hadn't even put it on there but it's a real small Chuck and I needed an 8-inch size one so I did a little bit of looking a little bit of digging trying to figure out where I could find me a decent chuck and lo and behold one day as I was sitting in bed at night it hit me hey I think I've got a chuck in the shop and turns out I was right actually a couple years ago I bought a lot of tools and in a option up at a Boeing in Macon Georgia there was a whole cart full of just miscellaneous stuff and there were several things in that lot that I was specifically wanting to bid upon and I ended up getting winning that bid winning that lot but one of the things that was in that lot was a very nice ROM eight-inch Chuck and when I got it I really have a machine to put it on I just stuck it on a shelf back there in the back and it hit me that I had this thing I don't think this chuck has hardly ever even been used I think it's been used but very light work done on it if it's even been in use at all and it's been sitting on my shelf for about truthfull years so it's got a little it's a little dirty I got a little bit of rust on it my job today is I want to tear this thing apart I'm gonna let it soak in evapo rust get it cleaned up I want to take it completely apart check the inside to make sure everything's cool and then we're gonna put it back together now one issue that that I know I got to deal with is that yes this lathe had a backplate on it when I got it and I already kind of pulled that back plate off so if you're not familiar with these Chuck's typically you're gonna have a back plate this back plate is going to be what mounts to whatever machine that you want to mount to this one kind of has some type of Universal mounting plate I'm not really sure what it was designed to go up on but it doesn't fit my lathe what does fit my lathe is an l0 taper and that's what I've got here is this is just a partially machine back plate so basically the part that mounts on the spindle is all machine this end down here is not we need to machine the back plate to fit the lathe and actually fit the lathe on to the my machine over here so we will actually mount this on the lathes we're going to be using it on machine it so that we have the right taper and it's up back here we have to drill the holes to mount it into and we should be good to go so we're gonna be machining this back plate a little bit later in the video and this back plate is basically obsolete now at least for my use so let's get in here and tear this chuck apart and see what we got so let's start taking this apart by removing these removable jaws and they are probably on there tight there it comes so there is some evidence of some chips in here so I can't say it's never been used next step I want to spend the jaws out these are on the scroll on the inside there's a scroll thread around that and these are time to going back in they're also numbered 1 2 3 and these are also numbered on the end so you know which one to go in first and you have to put them in in that order 1 2 3 all right you're starting to see the scroll down there in the bottom now there we go go ahead and pull these out next step here we got some screws and I believe these hold in the little gear that spins this thing around so there's three places for your key Chuck to go in and these kind of lock that in place so let's see if we can get those out alright looks like we just need to kind of you know that gravity pulled those out I said that when there wants to be stubborn alright this one here's wanting to be a little bit stubborn so I got a magnet and let's see there comes very good it was just stuck in there I don't know why all right so now the whole bottom of this Chuck should come apart pretty easily may have to tap it apart I got a little brass hammer here or brass punch rather I see it comes okay that casting is out and then we got the scroll plate in here I think we got it there is the scroll and scroll looks like it's in great shape got some grease and stuff on it but take what I'm going to do is I'm going to take all this over to my parts washer now I'm just going to clean it up real good and there get all the grease off and then to the evapo rust and we'll let this thing soak overnight well I got my parts out of the evapo rust and everything's cleaned up real nice so let's go ahead and see about putting this Chuck back together just wipe this out real quick make sure there's nothing down in there and first thing we want to do is put our ring back in and it's just a nice tight fit in here it's in there and it is spinning like it needs to be I cleaned most of the grease out of this whenever we took it apart so I'm going to make sure we got plenty of grease down inside of this area here and I'm using a Teflon grease here to do this next thing we'll do is I put a little back piece in here and it's has to line up with the holes that go through here so let me go ahead and just let me go ahead and see if I can get these screws started which like hopefully get that post lined up I'm gonna leave those a loose for the moment because it looks like they're not lined up exactly right but probably when we put these in they will kind of self a line in there because those have to go into a pin in the back and these are held in place if you look there's a little groove right here and this screw comes in and locks that in place so go ahead and put those in okay go ahead and lock these down the little grease on these don't wanna get too much down in here but I do want to make sure we have at least some Lube on it and that's all the way around okay so now let's find this is job number one right here it's one two three and that's the order we want to go in so I'm gonna do is I'm gonna look and if you look hopefully you can see the scroll down in there we'll bring that one around until it just starts coming in so that's when that one comes in first so what I need to do now is find number one of these two this one two one all right so I'm going to do is slide this one in and hopefully when it comes around there there you go that's crabbing that one I'm pulling them I'll watch until it comes to number two right there so we'll take number two and I'll watch over here at number three yeah went these have to be timed properly or they won't work right they also have to go into correct direction and not upside down alright so now I'm going to do is I'm gonna go ahead and just bring these all the way in to the center just to make sure they're all in line make sure I didn't get miss a tooth and it's looking like it's pretty good so if all is well all three of those should hit the center at the same time and they did so now we can go ahead and put our jaws back on these are also numbered this is number three so it's going to go on this one there's a long one a short nut there [Music] okay and our Chuck is back together so now what we need to do is take our new back plate this is an ill zero back plate and I need to machine that so that it will fit up on there and we can put this together and mount it on the machine and run it you can see this l0 mount that I have on the lathe here which basically consists of a taper it has a key and then we have a ring that screws up on to a piece and pulls it up tight on here now what I've got here is a backplate this is just an unfinished backplate so it has the taper it has the the threads on it but this side is unfinished spanner wrench here and we will tighten that up on there and now what I want to do is basically machine this back plate on the lathe that way everything's gonna be running perfectly true on this machine and we will make it match now what is that's going to consist of is we need to of course face the front here the outside is just a little bit oversized we have to turn that down to the proper dimension I believe that's actually a metric Chuck we'll have to get a measurement on it to do it it's basically eight inches but I forget how many millimeters it is but anyway we'll measure it get that but the big thing is is here in the middle there is a little bit of a kind of a tapered piece that fits up on the backside of that Chuck in fact let me grab this and show it to you all right so here's the back of the Chuck and again here's a little recess area in here this actually has a little bit of a taper it's about seven degree taper and what I want to do is I want to turn this down just a little bit and basically get that taper put in there so that I can put this up on here this taper will kind of index this to get it centered up onto the piece and then we'll have to drill and tap three holes to bolt it all in place so that's kind of the the workflow here the big thing is going to be to get this taper to match and we're gonna leave about a half an inch of material back here then it's only gonna take about a little over a quarter of an inch deep on this it's not going to go all the way to the full depth in here that'll be enough to give it a register to run true on so that's the game plan I'm going to get some dimensions and stuff worked out so that I know what I'm working on and it will start turning this on the lathe alright I think we are ready to get going here so prior to lay that first thing I want to do is just touch off on this and we're just going to face that front ever so slightly see this a good flat finish all the way across we're gonna be met milling our machining off a bunch of this but I want to have a flat spot up there at that front so we'll start with that [Music] and I've made a mark in here area where I got plenty of material to still come off go ahead and start whittling this down I'm gonna leave a little boss there in the middle that we will cut the final state after we get through facing the backside down for the proper thickness we keep cutting it down till we get it down there guys we're bowed down to our final path here thinking about 25,000 per pass on the debt and that should leave me about ten thousand to clean up when we get through here a little bit I'm going to leave a little bit of material in there we're gonna turn that diameter down on that hub and once I get that done we'll get the thickness to the proper thickness so that should leave us about 10,000 extra Sigma [Music] I'm shooting for 625 on this and we're at about excuse me 600 on this and we're about 613 so I got about 13,000 to take off of that and the center hub right now is about a little under three and a half inches we need that to be three point two five three and a quarter so tell you what I think I'm gonna do things pretty hot i'ma let her cool down before we do anything else I've let this cool down now real good and what we'll do next is go ahead and get this diameter here turned down to the proper size and that size is three and a quarter inches three point two five and just to kind of see where we're at we are starting out at about three point four to five so we got about a hundred thousand come off of that diameter here and caught whittling away at it some about zero there [Music] [Music] I got a nice clean surface and we're about 4:15 so I think we're ready to go we're going to cut our taper I have my compound here set for seven degrees which should match the taper up in the in the tone the Chuck so what I'm going to do is we'll come in here I'm already kind of touched off right there but we'll feed in with the compound to cut that feed in a few tau cut my angle with the with the cross-feed here or with the compound rather so if you remember we have a taper in this socket right here and we're trying to cut the matching taper here on the the back plate so let's set this up here and see what happens and it's starting but it's not going all the way on there yet so I need to take a little bit more off [Music] all right let's see what we got now all right we're a lot closer but it's still not quite there so let me take the salute more off it's not gonna take much and we'll sneak up on it taking light passes I don't want to get in a hurry here and take off too much [Music] [Music] yeah we're like super super close I almost bet that will pull down with the with the the bolts in there but I'm gonna take just a probably another thigh off of it and I think we'll be where we need to be [Music] [Music] and I've still got just a little bit but I'm pretty sure that's gonna pull down whenever we tighten up the bolts so I'm gonna call that good and before we take this off the mountain I need to get the outside cut down and the chuck is 7 inches 870,000 right now we're at about 876 so I really only got about six out to take off of that diameter I knew it was close so let me come in here touch off [Music] and eight seventy right on the number so come on champ for those edge it's just a little bit I just want to break that edge I don't want to put very much in there at all to be planning the backside has got a good chamfer on it already take the memory cloth here I think we are good so I'm going to take this off and get the holes drilled in it and we'll map that shot here we go I've got the Chuck sitting on the back plate here and I need to locate the position for the three holes I need to drill in tap and to do that this is just a transfer punch and it's a punch that's pretty much the exact same size as the hole that goes down I got a set of these in different sizes now my set is in fractional inches this is a millimeter hole but this is it's almost a perfect fit it's gonna be just fine so I'm gonna put them in each of them it's got a center punch on the end and that will find the location for them so one two [Music] three take this back off and I have Center punch holes right where my holes need to be and now this is needs to be drilled and tapped for a 10 millimeter bolt I've got an eight and a half millimeter drill bit we're gonna go to the mill machine get set up and we'll drill and tap these holes I've got my three hole Center punched in here what I want to do now is just line up in the middle machine I've just got a pointer put in my Chuck and I'm finding the center of that hole and we will put our drill bit in drill our hole [Applause] [Applause] a little bit of a countersink on there shut that tap and get started [Applause] put a little bit of anchor lube on my tap here and we'll power tap this [Applause] thank that one's done I put my center back in here and we'll locate the rest of the holes here a bit more that way and pay that way see I think that's it right there all right way to get the other two done car three drilled and tapped holes make sure everything's clean and we will take our Chuck sit on here I'm just going to kind of eyeball those four alignment now I wanna tighten her down and I'm just making sure that this thing is tight all the way around looks like we got a nice good seal so I think we're good let's go put them light make sure my spindles good and clean spanner wrench here tighten that down and I believe she is installed I put a gage pin in my Chuck here and I what I want to do is just look at the run out now bear in mind that you know this Chuck while this is a nice precision Chuck having making Nate a new back plate we probably it's probably not going to be perfect and when I check it it's about four thousand South which honestly goes that's unacceptable in my book I really want to have my run out much less than that so for now today I'm running out of time we're gonna call this project quits but what I'm gonna do is in an upcoming video we're gonna put a tool post grinder on the slave and we're gonna actually grind the Chuck's are the inside the jaws so that it is actually running true on this machine and that that way this chuck will be running absolutely perfectly true with this machine it always goes on because it's a pinned in the back it's always gonna go on the same so hopefully once we grind that in we should be able to get that run-out down to hopefully less than a thousandth of an inch but this reach all chuck it's never gonna be perfect but I think I can do better than 4000 so anyway I think that's gonna be it for today but we did get our back plate mounted everything looks good and I'm real happy this Chuck is really in great shape and I think it's gonna make a nice addition to this reventlow well there you go that is going to be a wrap little video on mounting it chuck machining a backplate and mounting of chuck on a lathe a lot of times you buy a chuck that doesn't come with the proper back plate on it already this is the job you have to do and it's fairly simple different chucks are a little bit different I've seen them with different arrangements on the back but basically you just machined your back plate to match whatever you got in your Chuck just like we did here so with that they'll be wrapped guys as always thanks for watching comments are appreciated please subscribe the channel if you haven't already and we'll catch it on the next video thanks for watching [Music] you

Channel: Keith Rucker - VintageMachinery.org

Views: 69,862

Keywords: Machine Shop, Machinist, Lathe, Restoration, Vintage Machinery, Keith Rucker, VintageMachinery.org, lathe chuck, chuck cleaning, three jaw, metal lathe, 3 jaw chuck, vintage machinery keith rucker, vintage machinery restoration, lathe chuck mounting, lathe chuck backplate, three jaw chuck disassembly, 3 jaw chuck disassembly, 3 jaw chuck runout, 3 jaw chuck assembly, 3 jaw chuck mechanism, lathe chuck cleaning, three jaw chuck assembly

Id: LGbKMlIRV_E

Length: 32min 25sec (1945 seconds)

Published: Mon May 27 2019