25mm 1" Sintered Diamond Hole Saw Core Drill Bit Tools for Stone Marble

JINGLING Diamond Hole Saw Drill Core Bit Diameter 25mm 1" inch for Marble Stone Granite Tile New p rofessional diamond m arble hole saw core drill, m ade of high quality diamond with precision drilling speed and long life use Description: Product Name: Sintered diamond core drill bits, Diamond sintered bits Material: Metal, diamond Hole/ Outer Diameter: 25mm (close to 1" inch) Inner Diameter: 20.5mm Drilling Depth: 51 mm (close to 2" ) Total Length:   83mm Recommend Speed: 2080-4160RPM Color: Gold Tone Quantity:  1 Piece Application: Mainly used for drilling Marble, Granite , Rebar Concrete, Porcelain Tile, Ceramic Tile and other hard material. Ideal for drilling the faucet mounting holes in stone countertops, plumbing lines in showers, and vanities We don't recommend drilling holes in smooth ceramics and glass, because it is difficult to complete the drilling operation, and the edge of the hole will chipping Method of Use: Use Wet or Dry To prolong its using life, must use with water for cooling and lubrication. Gold paints on the body of this bit to avoid getting rusty. Feature drilling stably, fast speed, not breaking the border. The hole saw can be used with Bench drill, hand electric drill. When you using hand electric drill, start slowly, 45 degree angle, go vertical after you make an initial mark We Can List Any Size & Amount Of This Product: Hole Cutter Diameter from 6mm – 50mm We will send out your order within 1-2 days after payment has been received and cleared Please let us know if you are looking for other accessories or hardware How to use a hand drill to drill holes in the stone/tile? Step 1. The bit on the glass/tile/stone 45 degree, open a half-moon notch on it Step 2. Slowly up the bit to 60 degrees, and then gently drill Step 3. Reached 90 degrees, continue to drill Step 4. Drill through the glass/tile/stone finally, the technique requires a " wobble " of the drill rather that steady pressure straight on The technique requires a " wobble" of the drill rather that steady pressure straight on The other considerations are depth, if you go more than the 1 " or so the bit allows you will need to stop drilling and take a cold chisel to remove center section of limestone

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