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Diamond Core Drill Bits | Recommended Drill Speed (rpm) | ||||||||||
Material Bit Size --> | 1/8" to 1/2" | 5/8" to 1" | 1-1/8" to 1-1/2" | 1-3/4" to 2" | 2-1/4" to 2-1/2" | 2-3/4" to 3" | |||||
3mm to 13mm | 16mm to 25mm | 28mm to 38mm | 44mm to 51mm | 57mm to 64mm | 68mm to 76mm | ||||||
Fiberglass | 1200 | 700 | 525 | 350 | 300 | 250 | |||||
Glass, Ceramic & China | 800 | 500 | 375 | 250 | 200 | 160 | |||||
Limestone & Marble Stone | 600 | 450 | 325 | 225 | 175 | 130 | |||||
Ceramic Wall Tile | 600 | 450 | 325 | 225 | 175 | 130 | |||||
Porcelain Wall Tile | 500 | 375 | 275 | 180 | 150 | 125 | |||||
Porcelain Floor Tile | 500 | 375 | 275 | 180 | 150 | 125 | |||||
Granite & Quartz Stone | 400 | 300 | 225 | 150 | 125 | 100 | |||||





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