Monarch 16" Lathe Restoration: Feed Rod Bushings and Worm Gear

[Music] hello Keith rock here vintage machine reordan we guys from back on the monarch 16-inch lathe restoration though it seems to be a popular theme here lately I'm trying to get this thing knocked out so we can get that machine back up and going and we're still working on the apron in the last episode we kind of got all the gears and everything back inside but I've still got one more thing here that's fairly involved to do before I can finish just putting everything back together and we want to talk about that in this video and I do it we're basically going to be making some new bronze bushings for the feed rod so here's what we got right now the the apron is actually turned upside down this is the bottom this up and this little piece here is the part where the worm gear fits up inside up and the feed rod the one that turns that drive us a feed on the lathe makes the carriage move back and forth that rod rotates inside of this these bushings there's a bushing on either side and I had a viewer kind of pointed me out to this and I appreciate that very much because I hadn't noticed it but a common problem on these model k lays is these bushings will wear over time and they just need to be replaced so this is a believable 1 inch inside diameter here and I don't know how well you can see it on the video but kind of this area back in here is worn in fact it's about an eighth of an inch out of round down there where the pressure from everything has kind of pushed down in this area and over time it's just eaten that away so the nice thing is is that my art made these where you can get these out and you can easily work on them or somewhat easily anyway we'll see how easily we can work on them and that's what we're going to be doing today is getting these bushings out we're gonna be replacing the bronze in them and getting this thing back up to snuff so the way these bushings are held in place is there's actually two tapered pins one on each side that is drilled down through here and kind of catches the outside edge of that bushing and that keeps that bushing from both spinning as well as moving in and out so we need to remove those type of pins and to do that I'm gonna grab a punch here and we're going to come in from behind there's one tapered pin and this one's in a little bit tighter that one is in there tight there it comes and that pin it's got some mushrooming on it we may end up replacing that one anyway we got those lock pins out so now what I'm going to do is coming here with another punch I'm going to get behind this piece of cast iron and let's see if we can knock that out I'm gonna get a different punch a little bit bigger hammer and lick of the air I'm not sure I was hitting it in the right spot cuz that came out much easier but there's one of the bushings let me get the other one out that one's coming out to mark these kind of right here oops all right that one this that one and put one just gonna put one mark on that one to mark it goes there and I'll do two on this side one two and one two and again that would just help me when I go to put this back together that I get the correct one on each side these holes are drilled they probably one would probably not interchange on the other push up in there but that pin hole for the taper pin wouldn't line up so let me get you over here get you to close up these I think you see the the wear on these better now so if you look at these it's pretty easy to tell this isn't round this that this edge up here is the unworn area or the very lightly one area but you can just tell by the thickness here and here and here and how much Center it is down here how that has worn down this one here it's a little bit easier seeker there's actually a little groove around there and you can see that's probably I don't know between the 16th and the eighth of an inch and it's actually worn completely to it on the bottom there so these outer rings or cast iron and you know I was talking with one person he said that these ladies originally shipped with cast iron bushings that he didn't have bronze in them and a lot of times people would actually bore them out and put bronze in them so I'm not sure if these bronze bushings were Factory or whether that was somebody else's repair to this before and these are pairing again or whether it came from the actually this way I think this is probably someone else's repair because of these little pins that are in here to keep them from spinning those are two spring pins and I believe that based on how monarch put everything else together they would have used tapered pins and - I just can't believe that they would have left them proud like that sticking out like that I think they would have actually been flush but I really don't know we're gonna try to get these little pins out and then we'll take these over to the press in fact let me just press those out on the press as well because they do go all the way through and then we can try to press these bronze bushings out and then I have to make new bronze bushings let's go over to the press and see if we can get those out there's my pin I want to press out I'm gonna just put it down and we're going to come in from the backside I'm just going to grab a punch here and I see here scoot that over just a little bit easy as pie I don't want to go beyond that just because it's starting to get bigger diameter on my punch but we got it mostly out let me get a little bit longer punch all right whatever uses a nail I just got a 16 pin out here i ground the tip off of it or the point off of it and hopefully that will allow me to press this out the rest of the way and there it goes that's all I needed so that's got that lock pin out so let me get is something that I can push this thing with and see about pressing that out so my next task here is to press out the bronze bushing and I was looking for something big enough that would catch the inside but not the outside and what I actually found was a piece of square stock here just laying over in the scrap bin and I think this is going to catch it's gonna catch it and Rickon in the four quarters but I think that'll be and we're gonna put that on there and I see what happens there it comes nice press fit [Music] all right there's one out there's the bronze bushing and I get the next one and we'll do the same thing I'll do it off camera so guys we're ready to go ahead and start turning these bushings the inside diameter on these came from the factory at one inch I'm gonna probably just run a reamer down them just to make sure they're exactly right on size they feel a little bit tight to me on the shaft but they're really really close and they had a tolerance on them so anyway I'm just gonna run a reamer down those when we get through the job for right now those we need to turn the outside of these down and these are a little bit oversized I purchased these bushings from a master car and I got a little bit oversized so that I could turn them down exactly where I wanted the pieces over there are exactly inch and a half on the inside diameter and I measured the little bronze pieces that we pulled out of them and they had a 1,000 oversized interference fit so we're going to turn these at one-inch 5:01 so one thousandth over one and a half inches and I've got this mounted on a expandable reamer or excuse me expendable mandrel and basically what you got here you got a taper going down this way and this piece here slides on that and as it slides up its tapered on the inside and it expands you can see you got these little expansion joints in here and it will fit a range depending on where it is on the shaft I think seven eighths to one inch is what this one's made for so that is on there it's on there nice and tight we're turning it between centers which is a good way to do something when you've got an inside diameter or you got something that's already turned and you want to keep that concentric so we're just going to zip this off and get it down to an inch and a half or thousands over see where we're at after that last cut come in here and get a measurement and we'll use the micrometer now because we're getting close and we're about 8,000 Sauveur have one and a half inches right on eight and we'll check it on this too just to make sure that it's turning square you know within a tenth or two so that's real good so we got 7,000 so we need to come off of this - for a month dialing six and see where we end up all right let's see where we're at and I'm still reading about three over three over we want to be at two and a half turns over our measure a little about two and a half I want to be at one so we're just gonna barely make a cut here [Music] I lose my dog about a sow you got to get these precise measurements just take your time to sneak up on them so we're about a thousand a half over about a thousand about eight-tenths let's see where we are exactly if I donate tents I was estimating there see I see we happy tense we are on this one so that one is about six cents [Music] see where we are [Applause] I was purposely trying to take a little bit more off of this side because this a couple of tenths larger [Music] we're right on a towel over there and you know we're with we're within probably a tenth or two that's going to be fine for a press fit and they're more even on these side now so I'm gonna change cutters and I'm just going to put a little bit of a chamfer on either in make it up press in a little bit easier [Music] [Music] [Music] you know I think that was done we're gonna do the same thing to the other one and I'll probably do that one off camera we're over at the arbor press now and we'll go ahead and press the bushings in I will note that these are a little bit long there were the lengths they were when they came from where I got them from I'm going to go ahead and press them in here and I need to chuck up this whole cast iron piece in the lathe we need to ream anyway and I'll just go ahead and part those off while I have them in there so instead of trying to do it first I just figured I'd do it this way six one way half does another let's see if we can press these in with the with the Arbor press yeah they're just gonna go right in and that's all the way down very nice put the second one up here same process [Applause] and we're done so come back over to the lathe and we have put these back in I use the four jaw Chuck I indicated that in I didn't show it on camera you guys seen that a million times but got it running you know nice and true I've got a parting blade in here we're just going to come in here and Park this off not quite plus but pretty close to plus [Music] but sticking that in there to catch something we'll walk through when it comes off [Music] there we go we're gonna change cutters now and go in there they set off [Music] for this plush [Music] [Music] all right with so with that face-off now we're going to go ahead and run a reamer in here and get this thing make sure it is - sighs we shouldn't be taking a whole lot out of it we're probably going to clean a little bit out of there [Music] so with that I should be able to take this one out and go over there and test fit it on the shaft to make sure everything looks good and then I'm gonna repeat this process on the the second one and I'll do that one off-camera last thing on these is I want to go ahead and pin them back in place and instead of using them spring pm like they did before I decided to go with just putting a little set screw in there this is actually how monarch had done some other brass bushings on the slave so I just drilled and tapped a hole there I've already got that one set in there this one here is ready for the set screw to go in so we'll just start it in there and drive her on home these are ready to reinstall and I'm looking here I've got the one that's got one dimple on it I matched one dimple so I know this is the one that goes in this side and we're gonna go ahead and try to get those tapers where they're roughly in line and we'll just tap it in place now to further line up that taper just put this in pin in here and I can tell by the angle of this that it needs to come out just a little bit so I'm gonna take a punch here through here the inside that's a pretty straight shot it looks like so I'm gonna take a tape in now it should kind of self a-line as it goes in there and that one's installed we'll do the same thing on the other side we got both sides put back together everything should work just like it's supposed to I think what I'm going to do is take my rod and just kind of drive fit it up through here just to make sure that everything's going to be in alignment before I try to put it together and have a problem down the road so let me go get that and feed it through there and check that fit all right now for the moment of truth I see if this staff is going to fit I'm gonna put just a little bit of WD in there just for a little lubrication for test fitting here and not only does it have to fit it has to line so that one goes in just fine and there goes the other side boom that's exactly what we need so I think that the reason that this thing wears egg-shaped is is there's just keyway cut in here and basically every time this thing turns around it's like a scraper scraping on that bottom down there but it's got to have that key in there to key the the gear the worm gear so it is what it is so all right let's take this out and we're gonna finish reassembling the rest of the apron next step here is start getting the half nuts put back together so the half nuts as you see there's two halves here the nut these clamp down on the threading rod when you're threading so normally they're disengaged and when you go to threading you flip a switch and it squeezes these together it engages on threading rod through year now there's pins in the back of these and the way this works is there's this little cam plate in here you see you got these little cam shaped oblongs in it they let me put little oil on that so this handle goes through there's a handle on the other side that you actually turn and when you do it will open and close those little half nuts so there's two of these plates on the top and one on the bottom a little oil on so they'll slide good I'm going to engage the pin into this plate back here like such whoops that's the bottom one same thing on top [Applause] [Music] [Applause] you just gonna be aggravating aren't you so now this little plate here will hold those in so let me find the right screws for that [Music] [Applause] [Music] [Applause] that's got one side on and then we got another plate that goes on this side [Applause] [Music] like such okay all right so that's got the half nuts back in here well I bout got myself in a predicament here guys but I think I'm gonna be alright I got in here and realized that I need to get this worm Giri in and the shaft was sticking out and it wouldn't fit in but I was able to loosen things up and where the worm gear will go down in there are the worm it's not the worm gear this is the worm so there's a worm and there's two thrust bearings one on either side that all go down in here I'm gonna just drop that down in there you know what I need to do is I need to have a I need a piece of stock that uses an alignment tool so when I feed my feed rod in it'll all line up so let me let me work on getting something put together for that all right so ideally what I would have would be a piece of wooden shaft for the key cut in it just like the main shaft I don't have that and I don't want to take the time to make it right now so we're gonna try to cheat and just use a piece of metal to kind of get in here so I'm taking one thrust bearing I'm dropping down in here and I'm just kind of feeding my my alignment tool through here through the gear and we need to put another thrust bearing on the other side so we'll go ahead and get that one out can these are all brand new bearings that I'm putting in here this should be a pretty tight fit I've done some finagling in there and got this thing hopefully somewhat lined up used to keep my we're gonna see if we can thread the needle here [Applause] so you have for em in Emma this is where I could really use an extra set of hands all right I think we got it into the gear now [Music] we do I've got it through the first thrust bearing through the gear I'm trying to get lined up on the second thrust bearing now [Music] and we should be through there we go that is what we want I actually can't believe I got that in there by myself all right but you can see I've got that gear is a turning now we got the actual worm gear back on now and just a quick comment about the worm gear so as we've said it in the previous video the one that was on it when I got the lathe it's nearly just one completely out almost no life left on I mean just a razor thin edge on there it's all that was catching so it needed replacing I bid the bullet and I just bought a new one from monarchs five hundred and thirty dollars yes that's a lot of money it was going to cost me more money to make one just not having the right kind of tooling and stuff to do it with so I bit the bullet and I think Brian block said it one of his videos recently when he bought the stuff from monarch you know you need to throw those guys a bone every now and then because they're still in business they're still providing parts for these ladies and it's expensive to provide those services I understand why the part costs what it does it's just hard to fill it out but you know I want to support monarch because they're still supporting me if I have a question a problem whatever with my ladies I can still give them a call and they do still have parts so I'm once on the bone and help them out there and they're helping me out at the same time so with that we're gonna go ahead and put a wrap this video up I've just run out of time I've got to get inside to get this thing edited or we won't have a video this week I've been really busy this week and haven't had a lot of time I just spent out in the shop and we'll hopefully we'll have some more time this coming week get this thing buttoned up and hopefully soon have that monarch lathe back up and running we're getting kind of close to where we need to be so anyway with that that'll be a wrap on this episode as always thank you guys for watching and we'll catch you the next episode you

Channel: Keith Rucker - VintageMachinery.org

Views: 67,912

Rating: 4.9680886 out of 5

Keywords: Machine Shop, Machinist, Lathe, Restoration, Vintage Machinery, Metalworking, How to run a lathe, Keith Rucker, VintageMachinery.org, Arbor Press, Adjustable Mandrel, worm gear, half nut, Monarch

Id: UUldwL-oLPg

Length: 29min 4sec (1744 seconds)

Published: Fri Oct 06 2017