Stoning mill tables, etc.

Chipper5783 said:
On a mill table - I suggest there would be any number of other issues that are more significant than what type of stone is used on the surface.
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I suggest using PGS stones for mill table care is an example of an overblown concern
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Agreed.

Chipper5783 said:
Keep the machine clean, properly serviced, don't drop things on the table (or otherwise abuse the machine) and the mill will provide great service for many years.
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No doubt the practice originated in shops where you cannot trust the state that the previous user of a table left it in. Stoning before every use is a bit excessive for the home shop, but as I mentioned above it is possible a burr was kicked up when doing, say, a vise change, so it's prudent to stone the table when removing heavy equipment/workpieces. A precision ground stone seems like overkill, but I've come to appreciate that the hardness of the stone may make a big difference: the harder stones are less likely to scuff the mill table during mishap, and are less likely to conform to the shape of a large burr.
 
I have done several searches for these PGS Stones. I keep getting Professional Gem Sciences. Can someone provide a link to these stones mentioned in this thread?
 
Thank you Francist.
I have seen all these videos. They do a great job of pointing out the benefits of PGF stones.
 
google searches for 'precision ground stones' and 'machinist flat stones' will get you there... they are US$ 160-180 per pair.
 
If you have a buddy with a surface grinder and are OK to not have a 'perfect' Robrenz set, you can grind them pretty easily/cheap. I did 3 sets of the Norton 2 sided stones, plus the diamond wheel from Shars for about the cost of a 'nice' set. I use my set all the time, they were a fun machining project, and I ended up at about 1/2 price.

If I'd had more friends at the time, it would have been even cheaper :)
 
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