Poor mans Cylindical Square

hi welcome to the w1 VLF youtube channel my name is Paul this is my first video and I'd like to try and make this video about a topic that I had a lot of interest in or still have a lot of interest in and that is a cylindrical square not having enough money to really go out and buy a good american-made cylindrical square and that one have to buy an import I thought well maybe I can build up some relatively simple equipment to to make my own and so I acquire surface plate and built a little measuring instrument here that you'll see in a few minutes and but what I really needed was a well-defined cylinder and I thought well maybe a wrist pin out of a small engine would work and here's a example of one of those wrist pins this is from a Ford six-cylinder 302 cubic inch engine and it's uh I don't know about three inches longer than the furnace and about 3/4 of an inch in diameter so highly polished and I understand the tolerances on these are very tight this one appears to have a little bit of wear but it still didn't seem big enough especially this surface area here to do what I wanted to do with it so I went to local people shop and this wrist pin which is I don't know just under two hundred four inches long and little over two inches of diameter seemed like maybe a likely elected candidate and these are also very well polished and I'm assuming the tolerance across the pin is very highly regulated you know precision ground but what I found out is not precision ground is the end although it is grown evidently the most important part for this is the business of risk it is this surface and not this especially in this application where floating pen you can see this one came out of khakis I'll zoom in on these a person can get a really good look at anyway I'm going to shoot over to the surface plate and my little test jig now and I'll continue this and I'll give you an example of what I did to take and parallel or not parallel above assure that this is 90 degrees to this because right out of the factory or with this particular crying that is not so I'll come back after I set up with that experiment okay okay now we're over here at the surface plate and just a little explanation of what I have here is a federal tense indicator a piece of steel that has been surface ground on both sides so that it's lays nicely against the plate it doesn't tell or move about well it slides a little nets with this this V block is for a little bit of additional weight and there's a little ledge built right into the front here and that's so that there's a an actual point of single point of contact on the bottom of the cylinder and depending on what this face is doing hopefully it's it's going to be the same all the way around what I did on both of these for your viewing pleasure is I egg meant it into quadrants 0 90 180 and 270 degrees when I first started off I did this in I think what 10 or 20 degree increments all the way around and and but typically I put 0 as the lowest reading on the meter and that's what we're gonna shoot for is the the the P excuse me the peak reading as I slide past this pin on each one of these at each one of the quadrants so we can see just how much it's tilting and typically the zero point I started with and you'll see the zero point and this one as well was the position where the pin was tilted closest to the indicator that was my reference okay so here's a here's one that I already ground and we're gonna slide it up against the indicator probably going around way too many times but and now what I'm gonna do is I'm going to peak it try to find the highest possible point and that's somewhere I guess like minus half a tenth so we'll move it back to ninety here and do the same exercise and then what do we have there something like ninety I can't really see the the indicator from up here so I have to lean over to the side and now we're gonna go to 180 I hate that squeaking yeah we're gonna try it again and go back and forth okay so that looks like the peak somewhere around the same reading and we'll go with 270 do the same thing see it looks like it somewhere and that's somewhere around the same location as far as like a half a tenth before the zero all right so I'm going to take this pin put it off the side and this is the factory factory grind here but again I did the same thing 0 90 180 270 and we're gonna put that pin up against here slowly because this one is gonna be quite a ways out out of out of out of 90 let's bring this around okay you know okay I'm gonna move the 0 over there and I can do that pretty easily look did I tell you knit let's see yeah you can do that pretty easily this is very rigid and I wanted it to be I wanted to make this more rigid than I actually needed I think it makes a little bit easier so our reference point is now 0 on 0 degrees and I'm slowly going to rotate this towards let's say 45 degrees okay and when I get to 45 I love that furnace not quite at forty five yeah I'll pick it up again so that's about what a thousandth or so and we're gonna come up to ninety now it's ninety is about 2000 s off yeah okay that's 90 degrees so now it's about but 4,000 so I've something like that four and a half and I'm going to come up to 180 slowly moving through 90 now it's like seven tenths off not at 180 yet though okay so that's what 9000 saw something like that okay that's the 180 you get it peaked up and now we'll come around to 170 excuse me 270 and it's gonna start to back off and it probably end up halfway between the zero and nine-tenths something like that we're almost on 270 now here we go you know bring it back I'm at 300 degrees now whoops and coming back to 0 closer it's about three hundred and something degrees I guess I'll just go right back to zero and here's my zero reference point again and again I pick it up yep okay so I'm gonna pull this pin off again and again and that's the that's the original one and here's the modified one you can see it's a little different on the bottom and I'll do this one very quickly once again and just slide this back over to zero back over here okay go to 90 I'm not even looking at the gauge and I'm gonna be looking at the gauge after when I edit this together 180 and 270 well I am looking at the gauge but not directly on it so I can't really tell how close to this and back to zero so I hand polit not hand polished but hand laughs this one on a small block surface plate another surface plate that I use just for laughing so if anybody out there can tell me if this is the the right approach the wrong approach what I could do better what what what I'm doing wrong but it sure seems like this this pin and actually I did a second one for a friend for him to use just seems like both of these the pins that I did the hand grind on or the hand lap are pretty darn close thanks a lot and if anybody's interested in how I actually did that in the actual the process I can make another video about that later thank you you

Channel: W1VLF

Views: 14,824

Rating: 4.7621622 out of 5

Keywords: Cylindrical square, hand lapping, 90 degrees, surface plate, measure right angle, First video, Diesel wrist pin, right angle, cylinder square, Dial indicator, one tenth indicator, right angle referernce

Id: Ofhek3Lbxkc

Length: 12min 16sec (736 seconds)

Published: Wed Dec 30 2015