Time lapse Model A engine build

[BRENT in 10-uh-C]

Originally Posted by 1930artdeco

I just want to be clear that 'fluidizing' the bearings means setting the bearing clearance to basically zero and (via the electric motor) 'melting' or 'wearing' the bearings to the correct size using the crank? This way they don't have to cut the bearings to size? Maybe it is just the term that is throwing me off.



I also am assuming that this is the best way to set the bearings (if you can) so that each bearing matches its individual journal/rod?


Thanks
Mike

Actually the bearings still need to be cut to size, but the burnishing method heats the casting only to the point where it becomes soft. This allows the bearing material to flow ever so slightly where it fits the journal pin with a closer tolerance. Additionally, the bearing material becomes harder after the process which increases the longevity of the bearing.






Hopefully you can read the information on these two pictures of a burnishing machine to better understand the process.

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