Diamond dust hole saws are suitable for drilling ceramic tiles, glass, marble, slate and porcelain tiles up to hardness grade 5 For use with conventional power drills on the lower speed settings with the hammer action disabled. Diamond Hole Saws - Instructions for Guidance only Cooling and Lubrication When cutting hard materials it is important to ensure the cutter is kept cool to avoid damage to the material being drilled and premature wear of the cutter. Using water as a coolant/lubricant will substantially extend the life of these hole saws. If you're drilling on a vertical surface try a hand spray water bottle, or sponge soaked in water and held underneath, but in contact with the drill bit. How to use your Holesaw In an ideal world your piece of work should be clamped firmly to a bench to allow for slow controlled drilling. Of course sometimes that's just not possible, so if you're drilling in situ or at an awkward angle try the following:- Make a template from a piece of timber or waste material, locate this over the area where you want to drill your hole and use it as a "guide" to start the hole. Once you've got into the surface by 1mm to 2mm you can remove the guide and continue to drill in a controlled manner.
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