FREE needle bearing spacers 4 high RPM

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The aluminum piston would melt long before the copper ever would. Aluminum melts at just over 1200F. Copper melts at just under 2000F.
Also, without heat treating, alloying, or work hardening being factored in (aka - elemental form), aluminum is also softer than copper.
Well i first used copper washers. 4 two on each side. While riddng i heard something bouncing around in the jug. I thought it was a broken ring. Upon tearing down the top end i found i was missing 1 washer. Using a flashlight i looked in the case and the copper washer was in 3 small pieces all of them were doformed. Took forever to get thoes pieces out. If copper can withstand the heat then what might have caused the washer to to deform and fall apart? Compression?the washers were also a perfect fit no play in the washer hole on the wristpin
 
I was riding hard but didnt think that would of happened. From my experience i would stay away from copper washers on the wristpin. Just my 2cents
 
Well i first used copper washers. 4 two on each side. While riddng i heard something bouncing around in the jug. I thought it was a broken ring. Upon tearing down the top end i found i was missing 1 washer. Using a flashlight i looked in the case and the copper washer was in 3 small pieces all of them were doformed. Took forever to get thoes pieces out. If copper can withstand the heat then what might have caused the washer to to deform and fall apart? Compression?
Without an actual metallurgical analysis, it would be impossible to say. We would need to know if the copper was alloyed with anything, or if it was pure. We would need to known the working hardness of the copper, such as if it was annealed, or work hardened from punch forming. The copper, aluminum, and steel all present in that area during operation will also all thermally expand at different rates, which could have caused the problem as well. Aluminum expands 35% greater than copper and fittingly, copper expands 34% greater than steel, while aluminum expands nearly double (about 80%) that of steel if you compare the coefficient of expansion.

There are a ton of factors at work to ever be able to give you an answer over the internet.
 
I'm not trying to call you out, so don't take it that way. I am just correcting incorrect information. ;) We can all always learn something new. I do all the time. I keep my posts factual for a reason. If I gave my opinion of the spacers being used at all we would probably be disagreeing a lot, but since it's not my engine and I kind of enjoy seeing experiments like this, I keep my opinion to myself and just observe the results that you post. I enjoy doing my own kind of stuff like this too, so I am not about judge you in a bad way.
 
I'm not trying to call you out, so don't take it that way. I am just correcting incorrect information. ;) We can all always learn something new. I do all the time. I keep my posts factual for a reason. If I gave my opinion of the spacers being used at all we would probably be disagreeing a lot, but since it's not my engine and I kind of enjoy seeing experiments like this, I keep my opinion to myself and just observe the results that you post. I enjoy doing my own kind of stuff like this too, so I am not about judge you in a bad way.
Your good. Not taking it as a judgement or anything like that. The washers im sure were pure copper. They are the washers that you get at autozone. In a pack of 10. Assorted sizes. They are used for a gasket the seats on a automobile caliper in between the break line connection.
 
Im thinking that they were being shaved down by the much harder steel pin bearing. Each washer was only 1/16 of an inch thick. Why i had used 2 on each side. Prob should hav found a thicker washer and used 1 a side Under high heat and compression the shaving Prob broke the washer in 2 pieces but after being crushed between the piston and head a few times it may have created a 3rd piece. Also im thinking thats where the deformation came from aswell the heat as it was being smahed by the head and piston. Idk. Just luck my motor survived the shards. Thats why i had come up with this idea washers made from spare piston.
 
Your good. Not taking it as a judgement or anything like that. The washers im sure were pure copper. They are the washers that you get at autozone. In a pack of 10. Assorted sizes. They are used for a gasket the seats on a automobile caliper in between the break line connection.
Those were copper crush washers, which are annealed to be extremely soft. Not ideal. You are trying to create what are essentially thrust washers, and those generally need to be the same hardness as the object contacting them.
 
One of my friends i ride with was asking me about this very thing, Told him i have no clue, and just today seen this. And was curious if this would work?https://www.amazon.com/INA-LS1024-Thrust-Bearing-2-750mm/dp/B007D3PGCY
Anything will work that will fit good and is strong enough. But you want one per side if you can. the more washers you have to use the more pieces you have that can fail. Plus you want something light weight steel is just to heavy to make a diff is you want higher rpm
 
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