RecommendedDrillHeadPressureChart.pdf Recommended Drill Head Pressure HK Diamond Core Drill Bits Material Recommended Drill Head Pressure (lbs.)* Fiberglass 10 to 15 lbs. Limestone & Marble Stone 12 to 18 lbs. Glass, Ceramic & Porcelain China 12 to 18 lbs. Ceramic/Porcelain Wall Tile 15 to 20 lbs. Stone Style Porcelain Floor Tile 18 to 30 lbs. Granite… Continue reading Recommended Drill Head Pressure
View detailsHardnessScaleChart.pdf Knoop Hardness Scale Material Wood – Pine 10 Copper 120 Limestone 125 – 150 Marble 140 – 180 Slate 140 – 250 Porcelain Fixtures & China 400 – 500 Glass & Ceramic 400 – 550 Ceramic Wall Tile 450 – 550 Porcelain Wall Tile 500 – 650 Porcelain Floor Tile 500 – 650 Marble… Continue reading Hardness Scale Chart
View detailsRandomScientificCalculationsChart.pdf Random and Useless Scientific Conversions Ratio of an igloo’s circumference to its diameter = Eskimo Pi 2000 pounds of Chinese soup = Won ton 1 millionth of a mouthwash = 1 microscope Time between slipping on a peel and smacking the pavement = 1 bananosecond Weight an evangelist carries with God = 1 billigram… Continue reading Random and Useless Scientific Conversions
View details