Quote:
Originally Posted by Chaplain
I have to agree with Jim. Safety wire is supposed to inhibit the loosening of a fastener. I have safety wired fasteners I can't readily see for the purpose of ensuring that parts, especially in critical applications, stay fastened. If the wire is moving that means the fastener is loose and loose parts have an inertia that can exceed their design strength and you have a failure. An example is a brake rotor fastened to a rotor hat. Does any body want to climb under their car to check all their rotor hat safety wire to see if it's moving? Wire it right and fugedaboudit.
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Just because it's called safety wire, doesn't mean it has to hold something tight. There are plenty of applications where safety wire is just there to hold things from coming off, not hold them from loosening up.
The problem with using safety wire to SOLEY stop a spinner from loosening, is that you can NEVER get it tight enough, no matter what you do. Both loops at the ends will tighten past what you can do with a tool. And if you go too tight with a tool, you wind the wire past it's stress point.
So no matter how "tight" you think you've got your wire done, it's not tight enough to prevent movement.
Now don't get me wrong.... I use my safety wire in the fashion of making it as tight as I can when I install it. But I ALSO check how taught it is when I drive the car. If the wire has become like a guitar string, the knock offs get a few whacks with the lead hammer and then new safety wire.