Let's Build A Model Steam Engine! The Base Casting
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- Опубликовано: 15 окт 2024
- This episode on Blondihacks, I'm continuing on the PM1 steam engine! Exclusive videos, drawings, models & plans available on Patreon!
/ quinndunki
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If you just turn the thermostat in the shop up about 5 degrees, those half-thou-shy dimensions will be spot on. :)
Now that’s clever. 😂
That would make for an awesome clickbaity video😂😂 "OLD MACHINIST TRICK FOR HITTING TENTHS😱😱"
5˚C or 5˚F? (At least we know the "beverage tooling" can handle either scale. And that was hilarious!)
"... 1.256 because it's an eight bit steam engine" - oh that's got me giggling. Thank you too for the Astronomical Unit conversion!
Yeah! Got to love her cookies.
I’m glad someone got that joke. 😁
@@Blondihacks I'm waiting for your screenplay- you've got writer's cred!
And without pause or any hint that it was not entirely serious. Very professional punster.
@@Blondihacks I got it instantly and thought "oh man I'm a nerd". Glad I'm not the only one :). That you are nerd enough to make the joke in the first place bumps up your street cred with us nerds :D
I really appreciate the metric conversions on screen, and that you keep using imperial for your narration. Give us non americans the correct measurements and the narration doesn't falter.
You’re the shop instructor I never had. Visited your website and love your “comments” rules and why. Have these castings and following. Thank you!
Machining in the steam era was quite the sight, and in some cases you will still see tourist railroads, museums, and modelers/hobbyists use the same practices. As a machinist in the semi-modern world, any part that requires precise holes or locations in large valve bodies, castings, or plate steel you would do on a boring mill or a mill with different size boring heads. In the railroad days though, it was not uncommon to use the lathe as a simple two axis mill if the part was suitable for it. I have many friends who work in steam preservation, and one shown me some pictures once where he was boring the ID of some valve castings. Their boring mill was broken and all of their mills were being used for other jobs, and the shape of the part did not lend itself to be spun in a chuck. So, he built a fixture and bolted the castings down to the cross slide of the lathe and put a boring head in the chuck to bring that ID into tolerance. It worked so well that when ever that job came back around, that was their go to for finishing the bore of those castings. In reality, if you think outside of the box enough you can build a steam engine with nothing more than a lathe and some decent tooling.
I have seen this done myself, I have been thinking about using this same idea when making a few Norman tool holders for my Drummond lathe..
Absolutely! This kind of trick is still very common among model engineers. And lathes lend themselves really well to some non-turning operations, like line boring, which is a great way to bore something like a long cylinder without introducing a taper. Lots of hobby machinists have access to a vertical mill these days, but hardly any have a jig boring machine at their disposal...
@@cooperised I dont have a mill myself as yet so I have been reading older books as to what I can do on the lathe..
My favorite part of watching these videos is the problem-solving thought process. Thank you for including the how and not just the result!
I look forward to this continuing series and seeing the final project running.
The fun and excitement of machining on a lathe instantly disappears when you walk over to a milling machine. What a lot of people don’t realise is that you don’t always have to mount the work to the headstock via faceplate or Chuck. A vertical slide or a large and hole plate makes for easier fixing and a fly cutter does an excellent job of machining a large flat surface. I use a mounting plate to fix the work to horizontally where it’s easy and then it bolts directly to angle plate or vertical slide depending on the movement required. A couple of mins with a dial gauge and I’m ready to cut. Steve
As I'm re-watching this series after going through your Mill and Lathe Skills playlists, I find I can appreciate much more of the operations you are going through, the various tools and so on that you're using and just how long this all took. I am even more impressed the second time. Bravo!
Thank you for the astronomical unit conversion, lots of machinist youtubers don’t even bother!
Thank you for the conversion in astronomical units. The scale is much more relatable now 😁
I believe the reason for the 45ﾟ angle on the crankshaft journals is to eliminate the end-to-end thrust from occurring at the split line between the bearing halves. The split line can actually bleed pressure of the oil film to zero and that is bad for a bearing. With the Angle at 45 the end-to-end thrust can occur in a contiguous portion of the bearing shell.
That makes sense!
Hi again. I think the machining of the 45 deg. Bearing landing faces could have been an excellent project for your lathe. You could have clamped the casting flat to your tool post, adjusted the tool post to 45 deg. And put an end mill in the chuck or indeed fly cut those surfaces. Just a thought, you are doing a grand job. Bernie from the UK.
Long time model maker here.... If you mount the base to a machined piece of aluminum block like 3/4"x4"x10" using the mounting holes on the engine base and get your datums parallel to the block, machining all the features like the cylinder mount and main bearings will be a snap. Of course, you have to very accurately drill the hole pattern in the base and transfer it to the aluminum block. Since you have a DRO, should be straightforward. BTW....great channel; old dog here learning some new tricks from you.
Yea, I figured this out after I was done. 😁
Here's a tip for setups on the table. The stepped triangular blocks are pretty hard material, but the table itself is not; a gronked down clamp can damage your table. That's easy to avoid, though, if you have riser blocks of 1/4 or 3/8 thick aluminum which go under the stepped blocks.
Glad to see the steam again. I'm repeating..I greatly appreciate the care you take with camera and sound. Easy to see and easy to hear. Thanks.
You could hold the casting in a 4-jaw chuck on a big enough lathe. It would still be a difficult cut. The other alternative for those without a mill is a large coarse file and a decent surface plate to check awareness and flatness. (You can obtain a surface plate by collecting a sink cutout from a stone counter shop. I got mine for free.) You have to be careful with a coarse file because it cuts amazingly quickly.
This video is an excellent essay on complex setups. Now to watch the rest.
Less than two minutes in and I'm loving it already, Quinn! I paused video just so I could type this. Table Fixturing techniques--yes, I'm interested!
My prints are dated 12-1-00 and on the base, they do not show the inside faces between the bearing caps surfaces as a finished surface as shown at 6:02. It does give the dimension from the centerline to one surface and the overall width between the two inside surfaces. The crankshaft has bosses (or built-in spacers) that rides between those surfaces which aligns the middle of the throw to the centerline of the base and everything along that centerline, so obviously it needs to be machined.
At 9:09, the adjustable parallels are brilliant. Didn't know these already existed, and reminds me of paired tapered shims in carpentry.
Awesome video as usual. I did a similar kit, and machined bottom of the base, then machined a thick aluminium block square, and bolted base to it, using hold down ears. Made rest of operations easy to hold. Thanks for all you post, you're an awesome teacher.
Coming along very nicely. I will be back. Thanks for the video.
Hi Quinn,
Great machining and use of equipment at hand. Another way to machine the bearing cap surfaces is to use a 45 degree chamfering tool or a 90 degree grooving tool while the base was bolted down for all the initial machining. Stay safe.
Hmm, machining at 45 degrees... Just use the universal table on the G+E shaper! Oh wait, wrong channel...
I think "astronomical units" is even further out than woodworker precision...
Great video, as always!
I’ve always wanted to do one of these! Still don’t have all the equipment yet but it will be fun to watch you do it. Thanks!
Thanks Quinn. I really enjoy the way you teach while doing your video. Awesome job. Thanks
My advise. When you machine the base cast bottom surface also drill and ream the mounting holes in the base. Then take a flat plate and drill and ream the same size holes in the base on the same print dimensions. If you machine the fixture plate square with the bolt pattern on the proper locations you can then use that plate as your jig to maintain locations. Even if the drawing has the surfaces of the cross head way as the datum line for many features once you know the distance from the fixture plate to the ways you can do all of your edge finding off of that surface and the edges if you placed the hole locations on line. What aligns the casting to the plate is locating pins in the plate that go in the holes in the base casting. I spent 30+ years in a manufacturing facility for automotive drivetrain components. Normally the first thing done after establishing one or two flat surfaces is to drill and ream locating holes. Every thing after that is referenced off of one of those flat surfaces and the reamed holes. On an engine block it would normally be the pan rail and two .750 or 19 mm holes in the pan rail. Both holes are used for side to side locating but only one is used for end to end location.
Lol thank you so much for including the 2 thou to AU conversion, that's my typical go to unit for small measurements!
If you think your setups were strange , wait to see what I used. I also worried about alignment and was thinking of using the crank 45 deg faces indicating them in but that’s saying the rough cast surfaces are on the same plane. Thanks for the ideas, & nice job.
I've always found it so beautiful seeing rough castings with finely machined surfaces, somethin about the contrast. Lots of fun following this project!
Hi 👋 I have just sent this to a friend in the Uk as I am living in France.
Beautiful work I'm joyed watching your video no I'm not really interested in steam as I am a retired ex carpenter cabinet maker specialist joiner keep up the good work hope you enjoy the finish product when you get it finished, stay safe, especially in this crazy times of virus going around and coming back again . Phil from the Moulin in France
The dimension conversion to AU is appreciated!
Loved the 123 angle setup. Very clever.
Hi im new here :D
Polishing the sliding sufaces might be counter productive. with the just machined sufaces the oil has some spaces to settle in and with the higher carbon part of the casting iron it will give you a perfect slippy surface.
You must have aced machine shop class , not to mention drafting and actually all mechanical classes !
Very Impressive ! 👍
Thank you for taking us along on this build. I'm really enjoying it so far.
Thanks for the zen machining break. I didn’t even realize I needed it until half way through and everything got ‘calm’ :-).
Nice job! I've built both the #5 in aluminum and the #3 in bronze, and they were both fun projects. I built the #3 in two weeks of evenings, because I wanted to get it done in time for our display at the local model engineering show. It's a much simpler project than the #5.
I have their Drill Press waiting in line to be built, and the one has some very complicated setups. I really need to build a boiler. Subscribed.
The conversion into Astronomical Units was incredibly helpful, thank You so much!
I first misread that as Angstrom Units, which is completely ridiculous because of her use of "=" rather than the "approximately equals" symbol as demanded by Heisenberg's uncertainty principle. Clearly that cannot apply, because she knows she is EXACTLY 1/2 thou out ;)
The value in Angstroms depends on whether you are looking at the part, and whether the cat is dead in the other room.
But how do you account for the quantum mechanics argument that it might be in two places at the same time?
Mon Dieu! Sorry to hear about Sprocket. You should not have left him in the other room.
Did a double-take with the astronomical units reference! As a perennial imperialist, that was hilarious!!
I like that you clamped the 123 blocks at the bottom to keep it from fishtailing. Clever!
When you did the angle milling, and you want a little more rigidity, you might try putting a round bar through the 123block and rest that on the top edge of the vise. It helps you to guarantee that your block doesn't slide down that tiny bit when you put a load against the angle blocks.
Good tip, thank you!
very cool. nice to see how someone else would do operations on tricky castings.
The most informative machining videos I have ever watched
Love seeing the complicated set-ups. For some reason I always really enjoy figuring these out when I do a complicated job. At first I thought you could use a right angle plate and bolt the casting to that and turn it 45 deg (left to right). But, then you would have been side milling again, and so not as good of a finish. Great set-up!
Pretty cool. I found some of these PM models at Penn Tool Co. Gonna get the Crank Shaper first. $130 for the kit. Thanks for turning us on to these PM kits. They are awesome.
Enjoying this very much - just completed my base to the same point as you. I suspect that cutting the two bearing caps apart (which I also did) was a mistake. It would probably have been easier to finish them before separating them. We'll see!
I agree with your comments ref: the old ways to use a lathe instead of a mill, for examples tasks a look at Steve Jordan's site he does a lot of complicated milling just using a Myford lathe and a top slide mounted on the cross slide. Great start to the engine series can't wait for next weeks slice .Thank you.
Your narration is stellar.
Great video. Looking forward to the rest of this series. Thanks for taking us along.
So glad you got some adjustable parallels. You are going to love them. I like to mic over them while I have them in the feature I am measuring when that is physically possible. Nice setups. Love figuring out that kind of stuff.
I came to the comments to mention this. I totally agree, it reduces an error factor in having to have enough clearance to get the parallel out.
Wow! Talk about some creative fixturing. Great setup you used to get those bearing blocks milled
It might have been a good time to drill and tap the studs for the bearings. Oh, I see you answered that already. As you were!
They are gorgeous castings. Don't get used to that!
Your solutions (fixture set-up) are well thought out. I try to second guess you and you always come up with a better way..
"this is an 8-bit engine" 🤣
Those adjustable parallels are awesome btw.
Awesome! I love PM Engines I bought one and machined it up in a few weeks. They make great kits. I build 3/4” Scale
Steam locos now.
Get used to, “living with” casting error, it’s something I try and try and try to minimize but sometimes I end up spending too much time doing that and not enough time you know, making the part.
Good advice!
@@Blondihacks I'm trying to get my RUclips channel back up and running I stopped at 150 Subs a few years ago and never really picked it back up. Glad to see someone else building steam! On RUclips.
WOW that is more involved than I thought.
an alternative for the 45s is a 45 deg chamfer end mill :) very nice job :)
Very good start. Your narration is excellent and looking forward to more.
Great start!! Can't wait to see the finished product!! Happy machining!!
I mean, I knew this was going to be complicated... But holy moly! Had to remember to breathe at times.
I think I might order this kit when I get my mill and lathe. Looks like a great starter kit to follow you along :)
From what I've seen of your work I do believe you would make a very good watchmaker as your attention to detail and your patience in producing the final part is really good so if you are looking for a new hobby come see me.
I love how she strives for precision in every operation, even when precision isn't required.
Thank you for all the pointers.....
Hi Quinn,
An enjoyable show today... i enjoyed watching you overcome the tricky clamping.
Take care
Paul,,
Clamp your endmill into the lathe chuck. Clamp your stock to the cross-slide and... viola, Mill! Albeit a _horizontal_ mill.
I'm looking foward to see the engine running. BTW I love to see the cat scrolling up in the credits
That’s Sprocket’s favorite part of every video
What's with the "woodworker ballpark" squaring dig? I slightly resent yet possibly resemble that remark.
Though to be fair, my cut angles do shift by a few degrees if I sneeze on them. Gotta love the challenge of moisture sensitive material.
Fascinating, this is all new to me, you explain well, there’s always something new to learn
Very good 45 set up! Nice job!
This is the nest casting I’ve ever seen, I always have to shim the hell out of my castings, and indicating is practically useless 😂
Love the measurement given in AU’s.
Right? Works out to 0.050863276 millimeters, in case anyone's needing that conversion. :D
I totally did a double-take on that, though, and just started laughing. (At 21:14, in case anyone missed it.)
Thank you for making videos -- I truly appreciate them! You are REALLY good at this whole "instructional RUclips" thing, I love how you talk through your thinking and just bring us along for the ride. You are excellent at making the viewer feel included in the process (which is really why we're all here). I'm watching this series because I got hooked on your BIG steam engine series and just couldn't get enough. Again, thank you for your diligence in doing what you do and for doing it so stinking WELL. I've seen a lot of this type of thing and know my way around machines a little bit, so I hope you don't think I'm just gassing you up baselessly. Anyways, I will diligently view and invariably like your videos as they come out! Love letter over :)
That was very interesting. Lucid explanations of all the set ups. I learned a lot, thank you.
Quinn, thank you for yet _another_ great video. I also enjoy the verbal & visual "cookies" you throw in without giving them away with a snicker or other change of inflection. ;) I'm looking forward to your next steam engine video -- I've always wanted to machine & build one!
I'm curious about the "European" (I think) term "Model Engineering" though. What does it _really_ mean? I grew up in Alabama where the Engineering profession has (or had?) enough horsepower that it is/was illegal to call oneself an Engineer or your business an Engineering business (any form of the term "engineer") without at least one _licensed_ Professional Engineer on the staff. Since that's what I learned as I grew up, it's always bothered me to see the term Engineer "misused" in other states, etc. Of course, I realize that what _I_ think may very well be wrong according to >99-44/100% of the world and that Alabama may very well be the outlier here, but I'd _really_ like to know more about the usage of "Engineering" across the country & the world, if anyone would like to comment.
In British parlance “engineer” is what Americans would call a “machinist”, so model makers get called “model engineers”. Because the hobby of making model engines is so much bigger in the UK, they get naming rights for it. 😀
To be fair, the term “engineer” is gray in the US as well. Software engineers, locomotive engineers, etc. It doesn’t have quite the rigorous cachet that licensed engineering professions would like it to.
There was a time when half of a thou was called a cat's whisker, but metric ruins everything. Seems like drilling the bearing block bolts might have been easy with the 45 degree setup, but I don't read instructions. Great video. Really like getting rough ideas from castings.
This is high excitement. I can tell that I'm going to LOOOVE this series! Many thanks!
People interested in old shop practice/how they used to build steam engines books would likely enjoy Modern Toolmaking Methods by Franklin Jones. By 'modern' he means 1915, but it's an amazing book with a ton of stuff about precision layout and setups. Jones helped write the original edition of Machinery's Handbook, as well.
Bloody awesome!!!! I used to think model steam engines were for total dorks....but you making them cool 😎 lol
In that case this is the first recorded instance of me making something cool. 😜
Using AU in the shop is quite underrated.
You could have bolted it to the table flat and turned the head of the mill to 45°. Though tramming it back in is a pain.
Or just buy a shaper and do it the Abomb way!
Nice job Quinn ! Always look forward to your new videos !!!!!!!!!!
If you don't have access to a mill, are creative and brave, you can accomplish a lot on a lathe. Backgear is useful and probably safer. Sharp hss tools also exert less pressure.
A great tool for milling those 45 degree angles is that adjustable milling head that can turn sideways you probably do have on your milling machine.....
Yah but then I mess up my hard-earned tram. 😁
Ooh, you know what I'd appreciate? Book suggestions! Since you mentioned reading a lot of old-timer model engineering books.. :)
What about using the mini-plallet system like Oxtools uses? Could get the bottom machined, then leave it fixured and have a continuous reference surface. And be able to easily set up angles.
We made Sine Plates in high school. I had 2 semesters of 3 hours a day of machine shop. We made several useful tools. Being young and stupid I just never brought any of my projects home
Quinn's on the tube...dinner can wait! Steam engine upload...my Saturday night just got a whole lot better
Thank you Quinn, Been waiting in anticipation all week!!!
Well I was about to go get stuff done, but then you uploaded so I guess being productive can wait.
What is a machinist's favourite grain? Mill-it!
Stellar analysis and explanation. Thanks for sharing.
Gday Quinn, I really like the way you explain your problem solving, lot of awesome tips that helps us hobby machinists, always enjoyable to watch, thank you.
P.s. what’s the cutting fluid taste like?...
Tangy!
Guinness World Book of Records called... you have the record for saying the word "surfaces" the most times in a 23 minute time span in a rational discussion while trying not specifically to say it! Whoopee.. you got that going for ya! :)
The Blondihacks drinking game is not for amateurs
The 8 bit engine absolutely slayed me
Surface where a gland nut rests? Glanding pad.
Hi I’m so glad I’ve found your channel can I please ask what should I be looking for on a lathe
"because this is an 8-bit engine" LMAO great
It's definitely important to keep things 'in whack'.
Loving this project