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hotwheels
Joined: 01 Jun 2007
Posts: 240
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 Posted: Tue Jun 30, 2009 2:07 am Post subject: rod end bearing jam nuts |
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I don't recall this topic being discussed, but may have just missed it...
Is there a source for deducing the proper torque required for securing rod end bearing jam nuts? There may be several different values to consider as aileron fasteners use smaller sized nuts than for torque tubes.
Thanks in advance for any pointers.
Regards,
Jay
Looking forward to working on something other than baffles
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nukeflyboy
Joined: 05 Jan 2008
Posts: 162
Location: Granbury, TX
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| Posted: Tue Jun 30, 2009 4:57 am Post subject: Re: rod end bearing jam nuts |
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I don't recall ever seeing separate torque specs for jam nuts. I have always made them snug. Don't use an oversized wrench and make them tool tight. If you are concerned then use a crow's foot and the same torque value for the standard size nut.
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Dave Moore
RV-6 built and sold
RV-10 built and flying |
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Kelly McMullen
Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ
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| Posted: Tue Jun 30, 2009 5:55 am Post subject: rod end bearing jam nuts |
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That would be crow's foot with calculation to account for the added leverage to arrive at torque value for standard nut.....which will be noticeably smaller number. In reality, if the nut is snug enough if you can't loosen with your fingers. Doesn't take even one flat after contact to be tight enough.
Had reminder over the weekend of overtorque. Tried to remove oil filter on friends plane, last serviced by a shop. Either they didn't use DC-4, oil or any lube on the gasket, or applied way too much torque. Likely will take extraordinary measures to remove.
On Tue, Jun 30, 2009 at 5:57 AM, nukeflyboy <flymoore(at)charter.net (flymoore(at)charter.net)> wrote:
[quote] --> RV10-List message posted by: "nukeflyboy" <flymoore(at)charter.net (flymoore(at)charter.net)>
I don't recall ever seeing separate torque specs for jam nuts. I have always made them snug. Don't use an oversized wrench and make them tool tight. If you are concerned then use a crow's foot and the same torque value for the standard size nut.
--------
Dave Moore
RV-6 flying
RV-10 QB - cabin top/fiberglass hell
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Ron.McGann(at)thalesgroup
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| Posted: Tue Jun 30, 2009 2:52 pm Post subject: rod end bearing jam nuts |
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I replaced my oil filter for the first time recently and had one heck of
a time getting it off. I believe it had been installed by lycoming (it
was the original filter) and was waaaay tighter than it needed to be. I
eventually got it off after using an automotive strap style filter
wrench and stubby wrench on the end of the filter, but it did not look
too flash after that.
The new one was installed and properly torqued with the wrench available
from avery (thanks Patrick!).
Cheers
Ron
VH-XRM
Flying in Oz
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