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Buffalo20
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I do it like you do it, Alan. Grinding belts are not fussy; they just need to contact the platen without fluttering but you do need a Pyroceram liner to handle the wear and heat. It is really important to round the top and bottom of the platen liner to avoid chafing the belt.
Mikey,
please, explain the need for a Pyroceram liner. I have a Jancy 2" x 48" (3600 sfm) at the home shop and a 2" x 72" (vs 2300 to 6000 sfm) Burr-King at work, they have plain steel platens. The Jancy runs sometimes 1-2 hours straight and the Burr-King round 6-8 hours a day. We have no belt issues, great results and great appearances on the ground edge. We use the same style belts, a 50 grit, Carborundum brand, ceramic grit belts.