Oooh, I can do that?For the platen, get the ceramic glass platen, and JB weld it to the original platen using the JB to fill the void.
Reading through the manual I found on vintage machinery.org , the lower pulley should be 4” and the upper 5” with a 1,725 motor.I would be surprised if the motor isn't (wasn't) 3450, which would give you about 4500 SFM assuming a 5"drum. Unless for some reason the machine was designed primarily as a wood sander.
Same here, I Googled the size with no success. I’m surprisedI found 2&4" pyroceram glass platen, I'm sure someone here has a vendor in mind who can cut a custom one for a 6". It's primary use is oven door windows.
I bought a cast iron platen from Grizzly for my DIY 6X48 machine off the parts list for their 6X48 belt/disc grinder. It does not have a pyroceram liner, but works fine and has held up well. Downside is that it likely will need to be modified for your machine, and it's not cheap.I found 2&4" pyroceram glass platen, I'm sure someone here has a vendor in mind who can cut a custom one for a 6". It's primary use is oven door windows.