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Mr. Garrett I have never had a problem shredding belts against a platen. Now I am worried about my new 2x48 grinder as all it has is a platen I made from stainless 316L and polished.
I have used platens for years including a monster 12"x I don't know, but bigger than 72" grinder at work with a big platen and huge tool rest table, but I have never shredded a belt. I'm guessing you put a lot of pressure on the belt? I can see that on some of the thin backing material specialty belts, but on a regular belt don't you have to use excessive pressure or push a pointed edge into it? Now I've done grinding 45s onto angle iron on a 2x48 Kalamazoo. The cut burred edge did shred the blade as I had a 100 or so to do and was in a hurry, I had to slow down. Was using a 60 grit zirconium belt.
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