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  #11  
Old 05-05-2022, 10:24 AM
theduff theduff is offline
 
Join Date: Jan 2012
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Default Lycoming Studs

Quick Hint:
Lycoming studs have different threads at either end. One side fits nicely for the associated nut, on the other the nut binds after only one turn or so. This is by design as the binding thread locks the stud in place with its interference fit into the aluminum. No thread locker needed. You’ll also note that the ends of the studs are a different contour showing you which side is to be installed into the aluminum head/case etc.
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  #12  
Old 05-05-2022, 12:08 PM
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dpansier dpansier is offline
 
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Replacing an exhaust stud may not be the best application for this method but extended length Allen socket screws are widely used in the industrial machine industry and have performed well for years. The ability to hold the stud from turning with an Allen wrench can be a real time saver.
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  #13  
Old 05-05-2022, 02:05 PM
Freemasm Freemasm is online now
 
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Quote:
Originally Posted by dpansier View Post
Replacing an exhaust stud may not be the best application for this method but extended length Allen socket screws are widely used in the industrial machine industry and have performed well for years. The ability to hold the stud from turning with an Allen wrench can be a real time saver.
Threads in bearing = a big no. Even more true when there's any shear load involved.
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