he bolts to be milled, 180 HOW AN AEROPLANE IS BUILTtherefore a hole must be drilled throughthe centre of the side of the casting, atright-angles to the existing holes, at eachone, in such a position that the circle ofthe fresh hole cuts the existing hole byabout one-third of its diameter. Into… … DRILLING JIGFig. 33. prevent the wedge bolt from turning roundand causing trouble when other bolts arerequired to be inserted for milling, afeather is fitted to the wedge bolt and aslot is filed in this bolt hole to take it. METHOD OF USE.Having completed this jig, the methodof working it will be…
Airplanes
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