think about if for a minute using a 5-lb standard plate as an example:
if you machine the 1-in diameter into a 2-in diameter hole you've removed material and lightened the plate. the 5-lb plate no longer weighes 5-lb...
get a good scale weigh the post-machined plates and mark the weight on the plate.
It will take good tools or a decent amount of effort. I tried to shave down one of my plates that was about 2lbs heavy. After about half an hour of grinding away at it with a grinder disc I had only removed a fraction of a pound. I guess I could have been more aggressive but it was a lot more work than I expected.
You better have a nice set of tools if you're going to be doing major surgery to your plates.
I have 50 pound plates i'm looking to utilize. On a scale they weight 53-55 so the weight loss would make them more accurate.
You won't be able to lathe them down, so you are going to have find a 2" drill bit and a high speed press.
I have 50 pound plates i'm looking to utilize. On a scale they weight 53-55 so the weight loss would make them more accurate. My 25's weigh 27. As long as i re-purpose them they go from unusable weight to usable weight. Whats it matter? Like the guy said. i can just label them with some paint.