Greenfield Gaging and Cutting Tools Chicago aka General Cutting Tools recomends you to confirm the accuracy of a tapped hole, always use a GO-NO GO gage. Never use a fastener (screw or bolt). Using a screw or bolt will not allow you to verify the size of the thread produced, only indicate that the bolt used will fit in that particular hole. GO-NO GO gages can give indications as to whether the thread produced is within the thread specification. A screw or bolt is not capable of giving such an indication. Accurate gages will also help predict remaining tool life by indicating tightness or looseness of the gage in the part.
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Onsrud Cutting Tool Distributor in Chicago, Illinois. Designed for Maximum Speeds and Feed Rates while …