Question:
Answers:
Look on the side of the tap, it will state what size drill to use.
10.2 mm coarse pitch and 11.0mm fine pitch thread.
Hi there, there tap normally has printed on it's side the required drill size that has to be used. If the tap has a pitch of 1.5mm then take 1.5mm from 12mm and thats usually a good guide line!
Good Luck
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to answer this question the thread pitch must be stated for 12 mm there are 1, 1.25 1.5 & 1.75 as popular pitches the finer the pitch the larger the tapping size 10.2 for the 1.75 getting it wrong means looking for someone with a t/sert kit that size to recover ittruck won't start its -12 here?
go for 10.5MM,it should give an average sixty percent thread form which is more than enough for anything other than specialised applications.remember to reverse your tap every turn or so to break the cut,WD40 great lubricant,even on cast iron,wear safety glasses!More Questions & Answers ...
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