gentlemen, I've been grinding for about 12 years with a Rayco 1625 super Jr. that uses the notched belt, similar to an automotive timing belt, cost, $270 for a replacement.I did research, did the math, converted to a 4 V flat belt, so it can slip, if overloaded, no busted notches as with the polychain. It's the best move I've ever made, I grind daily, big stuff, five feet dia. oak, no problem. And I use green teeth, sharpen them myself, with a drill press and a 2 in. diamond grinding wheel, makes them like new in 5 minutes, they cost $10 each to replace, but with resharpening, I get at least 6 resharpenings before they are spoiled. Just thought you might need to know this, my email is;
[email protected], you might need to know some things I have learned, and of coarse, I'm the best, my bumper sticker says; A man and his stumpgrinder, it's a beautiful thing, just for grins.,Have a great day, Larry in Florida.