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I pre-size bushings prior to installation to eliminate the problems regarding surface finish and degree of difficulty handling fully processed aircraft parts i.e. putting the finished part back on a machine and boring the bushings after installation. This involves measuring the bore, measure the...

Hot Joggle dies are a common solution used by both Boeing and Bombardier, there are specs available that cover this process.

THERE'S A HIGE AMOUNT OF GENERAL INFO IN MARTINDALE'S CALCULATORS ON-LINE CENTER

Not sure of the reasons why but as a generalization Bombardier's preferance is an interferance fit, Boeing a transitional fit and Cessna a clearance fit and there's a lot of aeroplanes out there that have been built to their respective specifications.

Makes you wonder about the structural integrity of what we fly on these days doesn't it?. Just read a web survey about the wages being paid and the experience level of people working on the 787 at various employers, things have sure changed in the industry.

When he says that he "cut" the hi-loks does he mean that he ran a tap through them??? Other than removing the coating on the thread of the collar wouldn't that also cut into the locking indents, (or would it just displace them??) collar would still torque off at the mechanical breakage value but...

Yes, I checked Hi-Shear's web site and it doesn't seem to be a "normal" combo. It's apparently standard on the 787 though, according to our engineer at Boeing the assembly folk down there are having fun as well. We did a repair with some 3/16" fasteners, kept the hole to minimum and didn't have...

Interferance fit to hole (bottom limit of spec) will usually eliminate fastener spinning and eliminate requirement to use hex key. If it is a transitional or clearance fit, make sure you use good quality allen keys. (www.fastenertooling.com) sells keys made from tool steel specifically made for...

No, I was serious, we just did a repair on a part we supply and had a lot of trouble stopping the fastener from rotating while applying enough torque to snap off the nut on the collar. I've worked a lot with aluminum and titanium collars and have never actually broken an allen key in a pin...

Anyone else out there having "fun" installing "BH" collars on "NX" pins (stainless on titanium)in transitional or clearance fit holes??