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Tractor Talk Discussion Forum

Making a flywheel

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Peter Treml

05-03-2004 13:45:42




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In have a IH414 pulling engine putting it in a smaller tractor 656 have both flywheels wondered about cutting out both centers and reinstall and weld it together would I have a problem with the weld letting go. Thanks Peter




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Vern-MI

05-04-2004 05:01:29




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 Re: Making a flywheel in reply to Peter Treml, 05-03-2004 13:45:42  
I have spun tested cast iron flywheels and steel flex discs for an automotive company. We used a spin pit lined with 4 inches of oak and backed by another three inches of lead and this was all set into a sealed three inch steel walled chamber. The entire chamber was subjected to a vacuum while the test was being conducted. When the cast flywheels would burst it would instantly turn the oak into small slivers of wood and bits of the flywheel would be embedded in the lead backer. No matter how much the operator prepared himself the sound of the explosion would cause him to jump. Please don't try to make your own flywheel from two cast iron concentric pieces.

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Redman

05-03-2004 18:51:06




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 Re: Making a flywheel in reply to Peter Treml, 05-03-2004 13:45:42  
how hard are you going to spin it?is the flywheel on either a steel pulling flywheel?
cast is only good to 3500 rpm for any period of time.
this is what i did,had a 1256 puller switched engine to a 436.took the steel flywheel to a machine shop and had them relocate the holes,weld the old ones shut and redrill then surface everything.
spins 6000+ and has not bothered yet.



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Russ

05-03-2004 18:25:06




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 Re: Making a flywheel in reply to Peter Treml, 05-03-2004 13:45:42  
I would machine the two parts that I want to use with an interference fit, .0005 per inch not to exceed .003, then heat the outside part to not over 250 F. Then put it together and stitch weld it and machine the welds flush. Then it should be balanced, a big job, might be a better alternative!



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Paul Janke

05-03-2004 18:45:03




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 Re: Re: Making a flywheel in reply to Russ, 05-03-2004 18:25:06  
The inner piece could be cooled with dry ice to shrink it down to allow the fit. I don't know if this can cause a fit so tight that something breaks..... ..



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Russ

05-04-2004 19:30:02




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 Re: Re: Re: Making a flywheel in reply to Paul Janke, 05-03-2004 18:45:03  
I have seen that happen, thats why I didn't recomend over .003, depends on type of metal!



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Jerry/MT

05-03-2004 17:15:25




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 Re: Making a flywheel in reply to Peter Treml, 05-03-2004 13:45:42  
Just out of curiosity, why do you want to do this? You'd be increasing the end load on the crankshaft and the rear bearing loads.
Most of these flywheels are cast. I wouldn't trust welding them together. I'd bolt them together with high tensil steel bolts and then get them trued and balanced.



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Stan(PA)

05-03-2004 13:55:39




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 Re: Making a flywheel in reply to Peter Treml, 05-03-2004 13:45:42  
Personnally, I wouldn't worry about the weld letting go, I'd worry about getting it dead on center, and the balance. Sure wouldn't want an off balance flywheel!



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