• Use an oscillating motion to remove dust.
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• Do not press too heavily on the tool. Let it work.
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• Drilling with water greatly increases the life of the tool.
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• Sharpening restores cutting power of the tool.
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• Cutting speed: DRY >11000 rpm - WITH WATER <3000 rpm.
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IF THE TOOL DOES NOT PIERCE either the part is frozen or has over heated.
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• or the material is too hard. You have to sharpen the tool on a stone
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• Or amplify the oscillation motion
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• Sprinkle with water during drilling.