#MT56

Making an Upshur Opposed Twin IC Engine.
In this video, part 3 of the series, I make the crankshaft.
All my single throw crankshafts have been fabricated and have never failed.
So for this two throw crankshaft I also fabricate it.
I hope some of you will follow along with my new engine build. Maybe some of you will have a go at making one too.
The drawings and build instructions are detailed in Model Engine Builder Magazine Issues 7 and 8. These can still be purchased on-line for a small fee:
www.modelengin...
If you can offer me any help or advice, please leave a comment.
I hope some of my videos help inspire others to venture into model engineering.
If you would like to keep informed of my new videos, please subscribe.
If you find my videos of value you could always help me continue making them by making a small donation at:
paypal.me/AndrewWhale
If you have any private questions/advice you can contact me via email at [e-mail]
Cheers!
Backing track credits......
Music: (intro) Water Lily by the 126ers - KZbin Audio Library
WARNING: Metal turning can be dangerous! I am not sure whether the methods I use are established ones, and I do not recommend them.
Please do not copy me without doing your own risk assessments!
You are responsible for your safety - not me!

[@timjoinson7232]

Tidy looking crankshaft Andrew. I have a slight concern that the centre web has been weakened due to drilling through the middle to align the shaft. The remnant piece of the shaft will provide some reinforcement but the forces will be greatest on the centre of that web. Perhaps others can confirm from experience whether the web will be strong enough or if failures have occurred using thus configuration. As you rightly say, if there is a problem you will have the option/challenge of making the shaft from a single solid piece. It is an interesting engine and I am enjoying this build series. Those spiders for the chuck are a neat idea.

[@learningturningmetal]

Hi Tim. That potential problem did spring to mind. In hindsight I think I could have increased the width of the crank webs without them interfering with anything else. However, I would have thought that the remnant piece would offer some reinforcement,but I guess time will tell. Cheers Andrew

[@gb_engineer]

Hi Andrew, looks really good. On my last twin crakshaft build i used the same method as you with Loctite 638 and pins, athough the joints worked loose due to an apparent failure in the Locktite, i rebuilt the shaft again and a mate brazed the joints which worked a treat lucklily with no distortion. I tested the Locktite on some scrap and found that failed too. I then realised that the Locktite had expired by 1 year so was scrap - a new bottle was purchased and all is good. Cheers Andy

[@learningturningmetal]

Hi Andy - now that is very interesting. The Loctite I used to temporarily join the crank webs together was from an old bottle and that failed. Fortunately the Loctite I used for the final assembly was from a new bottle. Looks like it might have been my lucky day 🤞 Cheers Andrew

[@goboyz8016]

Great job. Would love to see a one piece crank shaft build. I think you would do a great job with it. Not too many builds on KZbin and would love to see you machine one if you find the time. I plan to do one myself soon.

[@learningturningmetal]

Thanks mate. Maybe I will bite the bullet at some point. Cheers Andrew

[@jdshqs]

we had to build one as part of our machinist apprenticeship. its not overly difficult

[@OL6162.]

👍👍👍👍👍

[@douglasbollinger8678]

Coming along nicely Andrew! Enjoying this build as always.

[@learningturningmetal]

Hi Douglas - always good to hear from you. I hope you are keeping well. All the best. Andrew

[@daverichardson5861]

Fascinating watching it come together Andrew. Good job done. Stay well.

[@learningturningmetal]

Thanks Dave. All the best. Andrew

[@mattomon1045]

Mr. Whale it looks like a great crank shaft !!!!!!

[@learningturningmetal]

Thanks mate!

[@Stefan_Boerjesson]

Nice video, fine job. Always a pleasure to watch even if crankshafts are not planned for yet.

[@learningturningmetal]

Thanks Stefan. 👍

[@mrc1539]

That really came out nice ! I find that most of the time when I try to take just a hair more on the Lathe I end up taking a hair to much 😞 ! Then I get to start all over again 😊 ! Just really enjoy watching the chips fly , LOL ! 😂

[@learningturningmetal]

Ha ha. I think we all fall into that trap. Easy to take material off but very difficult to put it back on again! Cheers Andrew

[@dermotkelly2289]

Good job Andy. I'm sure that will work fine as it's only a model. Trying to make a 1 piece shaft will take a lot of know how but I have never machined a 1 piece. A friend of mine who was very experienced tried to but fouled it up on 3 occasions so he did it out of a few pieces.

[@learningturningmetal]

Thanks Dermot. I'm always one for an easy life. No point in making things more complicated if I can avoid it. Fingers crossed it will be strong enough. Cheers Andrew

[@abbottart2000]

Good looking crankshaft, Andrew. As a possible plan A#1 rather than using the Loctite 638 the webs can be soldered using the Harris Stay Brite. I position my webs then drill the pin hole locations initially just thru the webs from one side, but not thru the shafts. I then apply a little Stay Clen flux in the pin holes and insert a small piece of the Stay Brite solder in the holes as well and heat the entire assembly until the solder runs. I then redrill the pin holes thru and pin the webs using Loctite the same as you have done. So far, the heating has not distorted the alignment of the crankshafts.

[@learningturningmetal]

Hi Earl - that is a brilliant suggestion. Having had a good experience with Stay Brite on the cylinder sleeves I did wonder how to apply it on the crankshaft. I just couldn't work out a method. Your solution sounds perfect. Thanks for the tip! All the best. Andrew

[@nobbysworkshop]

Excellent job Andrew. Very nicely done. I like your clock/thermometer. 13^c only 3.5^c in my workshop. I'll stay indoors :) ATB Cheers Nobby

[@learningturningmetal]

Thanks Nobby. Roll on Spring! Cheers Andrew

[@daveticehurst4191]

Great Outcome Andrew. Looking Good. Best Wishes for 2024 from Australia.

[@learningturningmetal]

Thanks Dave - all the best for 2024. Cheers Andrew

[@be007]

best wishes andrew ! another nice crankshaft bild. cheers ben.

[@learningturningmetal]

Thanks Ben. All the best. Andrew

[@rickpalechuk4411]

Looking forward to another great year of projects Andrew Cheers from chilly Canada 😉

[@learningturningmetal]

Thanks Rick. Roll on Spring! Cheers Andrew

[@rickpalechuk4411]

@@learningturningmetal I hope spring will be early this year. Forecast says -42c tonight

[@georgeclements2742]

Happy New Year Andrew. Is there a reason you didn't use any lubricant when drilling the holes ? I think that I would have used some emery cloth on the journals before trial fitting: silver steel can be a bit of a pig for throwing up burrs. I don't know what the highest speed is on your mill, but 1/16" drills need a pretty quick one to cut well, though I can see the advantages of using the mill rather than trying to set up up a drilling machine.

[@learningturningmetal]

Hi George - a Happy New Year to you too. To be honest I'm a bit random when it comes to libricating holes when drilling. Though I do make sure they are lubricated when reaming. It's pretty cold in the workshop at the moment and it is sometimes quite difficult to concentrate. I think the mill was flat out at around 2500 rpm when I used the 1/16" drill bits. All the best. Andrew

[@Steviegtr52]

Coming on nicely Andrew. Good on you making the crank. As you know i cheated with the Chainsaw one i used. Steve.

[@learningturningmetal]

Thanks Steve. Unlike you I am absolutely useless at design. Give me a drawing anyday! Cheers Andrew

[@modellingmark]

Hi Andrew, left field question. What clock is it in your workshop? I’m after a clock that shows the current weather. Great job on your crank shaft!

[@learningturningmetal]

Hi. Unfortunately the clock only shows inside temperature. I think I bought it from AliExpress but I can't find any details. Cheers Andrew

[@stevenaegele5228]

Best wishes for the new year Andrew!

[@learningturningmetal]

Thanks Steve - all the best for 2024! Cheers Andrew

[@russellsemple6501]

When are you going to do another steam engine Cheers Russ

[@philipgeorge5708]

Hi Andrew, I'm impressed with the accuracy of your three jaw chuck machining those crank pins. How accurate is it?

[@learningturningmetal]

Hi Philip - a good point. I usually use very accurate collets - but very difficult to set a back stop. The chuck has around 3 tenths of a thou runout. Fingers crossed the crankshaft will be good enough. Cheers Andrew

[@edvandeheyning763]

Hi maye you still alive? Hope all is well

[@learningturningmetal]

Hi Ed. Yeah still alive and kicking. It's no fun handling cold metal in a cold workshop. I hope to get back in there soon. Cheers Andrew