Making Dividing Head Plates TIPS #621Transfer Method tubalcain

hello once again it's mr. Pete your YouTube shop teacher and this is video tips 621 and I'm continuing here making a series of videos on making index or dividing plates for index heads and so on by many different methods perhaps for different methods in the previous videos I cut out these plates at the high school and that's kind of a good video go back and watch that if you haven't seen it so that's how I'm coming up with the blanks for this project I recently purchased at public auction this dividing head that is meant to be used on a lathe now I've never seen one for a lathe before and in a previous video you saw me purchasing this and it's made by the master manufacturing company it must be fairly old but there was only one plate included with it now I'm sure that there were three or four plates initially and in a previous video I mentioned that I'm going to do a project with this and videos with this but I need another plate in order to do that job so I'm going to make some plates again by these different methods that you may find interesting now no one in the free world is going to need to make plates like this but this is fairly interesting and you made may need to it sometime in your life make whole circles different numbers of holes a different diameter so this will apply to you not just to these dividing head plates ultimately what I'm going to do with this dividing head is make the graduations on this teaching aid so that will be 25 graduations in a full revolution 360 degrees but I'm trying to think of other reasons for using this because I've never seen one before but I do know that it could be used on a lathe perhaps on a submarine or a small ship or something where they did not have a complete machine shop but they had a lathe and they had various attachments including this attachment here which they call a lathe converter but this is a powered attachment that would hold a cutter and then this this would do the cutting and the lathe would allow you to index the gear or whatever it is you're working on I know these aren't good pictures they're just on my phone and this is information that I found on the Internet but here is a device sold by the same company recognize that trademark and there is the dividing head in question here and apparently they sold this in a kit so that's perhaps why there isn't a complete set of indexing plates for it but there you see an attachment I'm not sure just what it does but there's that milling attachment as well and in this picture you can see that there is the dividing head and there is what I think a pile of plates two or three of the plates now I know these are bad pictures off of my computer but here I am at the auction and they're selling a Bridgeport mill but right below it there are some attachments now take a quick look because this is rather short here but there they are selling a versa mill with the manual I wish I would have bought it but possibly the plates went with that package deal that you see on the floor video tip 609 is the auction that I attended where I bought this dividing head I know that was a very awkward introduction to the video with some bad footage but I'm trying to lay out exactly what it is that I'm doing here so today I'm going to make a plate for this dividing head not this one this is my Hardinge and there is a full set of plates for this four plates now in a later video I'm going to show you how to make some of these plates even though I have a full set and these blanks here are quarter inch thick and really are for this project I will not be using those today these links are three sixties thick and that is what I'm going to use they are rough cut on the plasma cutter even the hole is rough cut and needs to be enlarged board to inch and a quarter so now why are the two different sizes mainly to show you here that it is not necessary always to have it the exact size of what we have right here and although it is on this one because there is a rim so these have to be the exact size in order to fit on this dividing head let me set this aside because we're not going to use that today so what I need to do is make a dividing plate that has 15 holes for the project that I'm going to do now that's an odd number not uneven numbers what I meant and what I'm gonna do is to make it by the simplest method and that is I'm just going to transfer the holes now this is a hard inch plate and notice if we can find the original numbers here where are they right here the inner circle of holes is 15 so I'm just going to transfer them with a transfer punch now that also could be done on a dividing head or a rotary table or by the coordinate method and those methods will be covered in later videos remember Keith Rucker has a nice video on this subject as well well what are you gonna do if you do not have a plate to transfer them off well possibly you could borrow one from a friend or shop although they'll be very hesitant to loan these out because they can't be replaced but that would be the very simplest method and how accurate it is it depends on your own working ability and skill level but I think it's gonna be accurate enough certainly for what I'm going to do now this has a 40 to one ratio although I have shown it in the other video I think there's going to be some of you are that are going to say what does a dividing head for a lathe do well it attaches into the spindle and this expands and then it allows you to rotate the spindle of the lathe in very accurate increments in other words dividing the circle you do not use the lathe under power you unplug the lathe when you use this or this would come around and kill you all right let me take this dividing plate off so you can see how it is it is mounted and you would have to do this every time you change plates so take the Acorn nut off and a washer and then the crank handle with the plunger spring-loaded and then there is a spring-loaded retaining clip that goes into a groove and will take this screw off I call this the Spyder the sector or whatever it is I don't know what the correct name is but you see these parts come off like that and then I'll take these three screws out and then the plate comes off now at first I thought well I can use the hardens plate because it's the it's the right size hole but the whole circle on these three mounting screws is not the same nor is the thickness of the plate the same so I was really disappointed because I thought hey I I had an easy solution but you know there is no easy solution now on this particular dividing head a piece of square stock could be used it doesn't have to be round it would look awkward and you'd cut yourself on the corners but there is no reason for necessarily to be round unless of course you want to hold it in the lathe easily in a three jaw Chuck this plate obviously is just one of a series because this one has whole circles from 21 23 27 29 31 and 33 and then the next plate would continue and there would be probably another smaller plate like this so the next thing I'm going to do is prepare the blank and of course I could use this and make it the exact same diameter turn it and turning it down in the lathe but just to show you that the diameter doesn't really matter I'm going to use the smaller one because you can see that on the hardness plate this size will easily accommodate the inner circle first thing I will do is knock off the slag and just clean it up a little bit I don't believe I'm going to turn this to diameter because it's a fairly good finish to start and that is irrelevant for my purposes and this slag can easily be knocked off with a cold chisel or a hammer and then I'll just clean it a little bit on the belt sander and be right back well the diameter here measures about one and 1/8 so I've already cleaned one of these up and I ran a boring bar through there on the lathe just enough to bring the whole back into concepts concentricity because it was a little bit rough and I ran an inch and 1/8 drill bit through there I'll show you that and that gave me a pretty good size a little bit oversized but that's going to be ok for what we're doing here you boys that are nice considering it's just drilled rather than reamed or bored so that's just going to be perfect now next I will transfer these three holes onto the plate and drill them and then of course they have to be countersunk as well I had to clean those holes out a little bit with a 1/4 tap I like to install the transfer screws so they just barely protrude the surface I implore you buy yourself hundreds of tools so you have one of every tool ever known to mankind now let's transfer these and rather than tap it all the way around and only have one or two hit I'm just going to put a sleeve over here and just give it a nice whack look at that just like downtown alright drilled and countersunk and ready to well this isn't the final installation but let's see how it fits up it's just nice now these screws have to be flush or a little bit below or they'll interfere with the spider all right that's good now I can take it off and do the important part which is drill some index holes the pin on the plunger here the indexing pin is in fact 124 123 and a half so let's call it 8th inch this is an eighth inch bit and this is the master this is not the hardens this is the hurt inch and the holes in the hardens are a little smaller but my point being I want to drill the holes in this piece 1/8 but I will have to use a smaller transfer punch from my number set this transferring could very well be done with the plate on here matter of fact that would be a good idea but since I took it off I'll just show you another way that this is a piece of inch in 1/8 stock to line up the big holes and I've got a clamped now this is the only time when I wish I had use the larger plate because I would have had more clamping surface the way it is this has to hang over the edge just a little bit here of my bench block now I'm ready to transfer and yes this could all be done in a matter of minutes on a CNC machine but I do not have a CNC machine and of course they certainly didn't back in the olden days when they made these plates I'm kind of wondering how they did it because to make a drill jig would have been an awful lot of work for them as well well I will start here remember this is the inner circle I'm doing 15 holes I'll start right there and work my way around with this little transfer punch I won't show all of it and that's 15 let's see what it looks like I know they'll be pretty faint now I'm going to deepen them just a little bit with another punch I don't think I'll use this little steroid punch have to be very careful when you're deepening them that your punch is perpendicular and not at an angle where you might move the center punch hole even 15 was a lot of work imagine doing one with 60 or more holes and so on I think that most of you know that before committing myself to the final size I often like to use the camera on micro drill press to deepen those now I'm not going to go all the way through because this is just a sixteenth inch bit but I like to go in just a little bit maybe a one third of the way through or so to establish the hole then when I go to drill the eighth inch hole it isn't gonna wander it isn't going to move and this one I got to go back looking pretty good to knock off all the buzzers and possibly just countersink very lightly from both sides as such then run the file over again notice how I have a tack in there so who won't roll off the bench everything else rolls off this bench that's not level I'm sure glad I'm not making a plate with this many holes just 15 and the plunger pin fits in just fine so this is essentially done and ready to mount on to the dividing head I know it's a poor man's way a cheap way to do this by just transferring it but it's going to be plenty accurate for what I'm going to do and I haven't talked yet about all the math involved that'll be in a later video sometimes I think I explain too many things but the diameter of the circle the whole circle does not really matter so what I've done here to illustrate that is to transfer these 15 holes on one of the larger plates which I have also bored out to show you that we can put it that circle just about at any diameter or radius that we want to let me carry that one step further all right I will scribe another circle to be concentric and it could be any diameter like that of the only reason they have the holes on the different diameter of hole circles is to accommodate all of these and sometimes the pleats are much larger and they've done it in sequence just for spacing and economy I know your British fans out there love you're more and right products but then again so do I but we seldom see them but this is a Center finder you don't see that kind very often now this is pretty inaccurate but I'm just doing it for an illustration so this is coming up against this aluminum piece like that and I'm lining it up with one of the center punch marks now since this is not setting flat we're losing a lot of our accuracy but what I'm doing here is I'm just extending these lines out through the previous holes like that let me go all the way around off-camera and do that I got a little sloppy there but this is just the illustrate that it doesn't matter what the radius or the diameter of the circle is however you'll see that there is a greater space between them as we get larger but yet we're still spacing the circle or we divided the circle I should say into 15 parts well this is a scrap for the fun of it these are eighth inch dowel pins now they're gonna fit in there a little loose because I didn't read these holes but let me go ahead and fit one into each hole here and we'll just have a real quick check to see how accurately they are spaced and I don't expect them to be perfect they can't be by the method that I did it all right let's see how accurate this is I think I'm gonna go buy the inside here and rock it got about four sixty eight or nine there four 78 4:71 pin fell out for 59 you can see they're all over the place they're not very accurate at all but was I the culprit was I inaccurate well let's check some of the originals and see how accurate they are now this is the master plate 316 that was on the lathe dividing head this is fairly accurate there's one that's below but you can see they are not perfect even the factory made once now let's take a look at the hard edge this is the one that I copied and we think of a hardened just being perfect now the eighth inch dowel pins will not fit in these holes they're a little bit undersized I do have some number 36 drill bits that I can stick in there that will be a fairly good fit what they're gonna wobble just a bit all right this is the hard engine as you can see some of these are going to wobble a little bit because some of the holes are worn or maybe they didn't drill them that accurately so here we've got how about four ninety four ninety eight but one of those is moving a little bit 497 494 and 500 so they're not perfect by any means are they and that kind of surprises me but then again you know these were made 70 years ago and we're not sure does how they were made I think this was made during the war probably even some semi skilled workers well who knows I'm just guessing as some of that but the fact that the originals aren't perfect of course translates into the fact that my copied one here isn't perfect but yet what couple that with the 40 to one ratio here there's probably not going to be a lot of inaccuracy in the final product that is being manufactured with this that make any sense to you is that clear of mud all right let's get this thing reassemble but I believe I'll clean this up a little bit it's just decade's worth of corrosion and dirt [Music] you you it looks kind of silly with these spiders sticking out in the middle of here doesn't it that's really the only downside I think to the fact that I made it with a little plate instead of the normal sized plate but I have a real good fit here with the pin into the holes I've tried every one of them so that's going to work just fine well there you have it making an index plate by the transfer method the downside of that again you have to beg borrow or steal someone's plates to copy off of but that may be a possibility I'm just showing you different ways of doing it this is ready for my demonstration that I will use all six or eight videos from now and in the next video I want to show how to make one of these for the Hardinge or I could do it for this too and I'll do that with a rotary table we'll see how that works out okay hope you enjoyed the video this is tubal-cain saying so long for now and I'll see you next time my hope you

Channel: mrpete222

Views: 34,907

Rating: 4.9866738 out of 5

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Id: OjdJtnFgZF4

Length: 26min 50sec (1610 seconds)

Published: Sun Dec 08 2019