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16th Aug 2019, 06:53 PM #1Most Valued Member
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Bronze bushes - split. (2 halves)
Does anyone know where one can get 12x16 split bronze bushes?. Cant seem to find anyone via google. Lots of non split.
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17th Aug 2019, 12:24 AM #2
Hi Eskimo,
You might have to make them !
Buy a smaller size bore, split them, clamp them together and bore to size.
I made some from two pieces of solid. Worked out OK.Best Regards:
Baron J.
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17th Sep 2019, 05:50 AM #3
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17th Sep 2019, 10:25 AM #4Most Valued Member
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not as yet, but am thinking I might make them this way..
softsolder two bit of bronze together.
Turn to size OD and ID and length
un-sweat ?
at the speed I work you guys have plenty of time to think up other ways and to let me know
this is for the Stewart Hart overcrank engine I am making
attached are drawings that Stewart sent me....note some dimensions are incorrect..eg crank eccentrics show 10mm dia hole...should be 12...so double check
Potty Over Crank.pdf
if anyone wants to make a bigger one I do have drawings for that as well
can anyone explain why its called and Overcrank engine
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17th Sep 2019, 07:45 PM #5Philomath in training
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That's the way I've heard it done and the way that I would be trying first
Michael
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17th Sep 2019, 08:30 PM #6Diamond Member
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18th Sep 2019, 04:10 AM #7Senior Member
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- Feb 2009
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- jilliby nsw
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Hi Eskimo, that's an interesting looking engine judging by the plans. I'm looking for a next year project. Is there a picture of the completed engine by any chance. Looks like there are no castings involved or at least I didn't notice any. How far into the construction are you? Could you possibly email me the plans if their not copyrighted? How much bigger is the larger one?
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18th Sep 2019, 05:46 AM #8
Hi Ian,
This link might be of interest.
https://plans-for-everything.com/hen...ine_plans.html
Lots of interesting engines to play with. I think the potty overcrank engine is on there as well.Best Regards:
Baron J.
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20th Sep 2019, 11:13 AM #9Most Valued Member
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- Apr 2012
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- Healesville
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- 2,129
Make bush from pb barstock in lathe, leave bush on bar and put in mill and machine flat to centre of bush, put back in lathe and part off, repeat proceedure.
shed
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20th Sep 2019, 12:38 PM #10Most Valued Member
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base and bearings mounts made...still a long ways to go...and yep no castings
here is Stewart's model on youtube
Stewart's has a governor and there is another on youtube without the governor
The plans I attached in the post above are what Stewart sent me....you should be able to save that as a file.
This is the Julius De Waal one that he basically copied from Stewart Hart's plan and scaled up...bout twice the size of Stewart's
JDW over-crank engine stewart-hart-09-05-12.pdf
Julius has a lot of other model drawings freely available on the net...here... www.vapeuretmodelesavapeur.com
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