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Old 05-29-2018, 10:25 AM
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rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,793
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There has been communications with Matco in an attempt to gain an understanding of what the problem might be.

It seems that occasionally an axle doesn't have fully cleaned up threads at the bottom of the hole.

Light clean-up of the threads can be done using a 10-32 tap if the threads of an AN3 bolt wont easily thread in full depth. Just be sure not to bottom out the tap and break it off in the hole.

As already mentioned, never exceed the max. torque value for a fastener.
An AN3 bolt begins to yield in torsion at something in the neighborhood of 60 inch pounds (only a bit more than 3X the normal torque value).
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Scott McDaniels
Hubbard, Oregon
Van's Aircraft Engineering Prototype Shop
FAA/DAR
RV-6A (aka "Junkyard Special ")
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