40/50 diamond inserts cut great for the first half of the day. Progressively slowed to almost nothing. Ground a 3000 square foot floor, and it took 3 days for one machine. 1500’ was ground in the first day. So on 2nd 3000 sq ft floor I bought the 30 diamond inserts with worst results, after 3 days (34 hrs) we ground 1000 sq ft. I stopped and had floor shotblasted,
6 years ago
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