Thread: Grub screw hole size for threading!
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Old 13th April 2010, 07:38 PM
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alga alga is offline
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Location: Vilnius, Lithuania
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Just Google for "tap drill sizes". It's a 6.8 mm drill for M8. In general, the formula is D - 1.08 * p, but some lists recommend D - p. (D -- outer diameter, p -- pitch).
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