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emrath(at)comcast.net
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 Posted: Sun Apr 12, 2009 6:07 am Post subject: the key behind studs |
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Are there any A&P's on this list that can anyone advise me why the ends of
four new studs appear to be the same and yet are not? The shorter threaded
end screws into the hole easily, while the longer threaded end does not go
in easily or accept nuts by finger tightening.
Marty in Brentwood TN, RV-6A finishing.
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n8zg(at)mchsi.com
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| Posted: Sun Apr 12, 2009 6:57 am Post subject: the key behind studs |
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Marty -
Studs are designed to be an interference fit. Put a little lube on the fat
end and jam two nuts together on the loose end. Use a wrench to drive them
to the desired depth. Remove the nuts and install the appliance.
Neal
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Are there any A&P's on this list that can anyone advise me why the ends of
four new studs appear to be the same and yet are not? The shorter threaded
end screws into the hole easily, while the longer threaded end does not go
in easily or accept nuts by finger tightening.
Marty in Brentwood TN, RV-6A finishing.
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
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mike109g6(at)insideconnec
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| Posted: Sun Apr 12, 2009 7:02 am Post subject: the key behind studs |
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Marty,
Studs are threaded differently. The 'cut' is what is different. The
shorter end usually goes into the case, whereas the longer end attaches
something and uses regular nuts. Also you may find that the thread on the
short end is coarse thread and the long end is fine thread though both may
be 1/4x20. Also the short end thread cut is made in a way to 'bite' into
the mounting hole so that it does not easily back out when you remove
whatever it is that the stud is holding, ie carb, exhaust flange, fuel pump,
etc. If you have an engine/parts manual or rebuild book it will list the
proper stud with appropriate Lycoming parts #. The parts # will then tell
you what kind of threads that you are dealing with. What studs are you
dealing with and on what engine? You must use the correct studs for each
application.
Hope that this helps,
Mike H 9A/8A SOLD
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pitts_pilot(at)bellsouth.
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| Posted: Sun Apr 12, 2009 10:05 am Post subject: the key behind studs |
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Well, you don't say where these studs go, but from the description I'm thinking they're intake or exhaust studs???
Those studs have different thread counts on each end ..... and may be of different diameter on each end depending on your engine.
And there's the possibility that they really are different studs ...... and got mixed up at the suppliers ...... the right bin right next to the wrong bin when stocked.
Linn
Emrath wrote: [quote] | Quote: | --> RV-List message posted by: "Emrath" <emrath(at)comcast.net> (emrath(at)comcast.net)
Are there any A&P's on this list that can anyone advise me why the ends of
four new studs appear to be the same and yet are not? The shorter threaded
end screws into the hole easily, while the longer threaded end does not go
in easily or accept nuts by finger tightening.
Marty in Brentwood TN, RV-6A finishing.
Checked by AVG - www.avg.com
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[b]
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