Kinetic friction coefficient of aluminum on lubricated cast iron

[Thijske]

Hey all,
I was recently searching for kinetic friction coefficients, and I noticed that for a reason which is unknown to me, some materials had not been appointed such coefficient. The specific kinetic friction coefficient that I'm looking for is aluminum on greasy/lubricated cast iron. Any type of motor oil would be used.
Does anyone know what value that coefficient has?

I know that it is possible to research this value (which actually feeds my question as to why it hasn't been done yet). Enclosed is a picture of how I tried to test it, before I realized it is quite hard and requires stackable weights to get a constant speed.
The idea of the experiment is that F=mg is as big as Fk.

If anyone is wondering, the following is an example of where one would be dealing with such coefficient. A car's engine has cylinders and pistons. To ensure a couple of things such as not losing pressure, cylinder rings are used. Those rings practically rub to the aluminum cylinder, and they have motor oil on it.
Eventually I'd like to figure out how much friction is generated with those cylinder rings with the formula Fk=fk*Fn.

Any help would be much appreciated!

 

[berkeman]

It looks like you already have a thread going about this. Please go to that thread and post much more detail about what you are trying to do. This thread here is now locked.

https://www.physicsforums.com/threads/friction-aluminium-on-carbon.982681/

 

[berkeman]

Okay, this thread is re-opened in the ME forum now for discussion. It is a continuation of this previous thread:

https://www.physicsforums.com/threads/friction-aluminium-on-carbon.982681/#post-6283200

but with updated constraints and materials. The OPs will update us with more information about their materials and methods in this thread. It turns out that @Thijske and @nilsvoorkamp1 are working on a school thesis project together, which is why they have posted fairly similar threads.