Baffle tie rods...I'm baffled.

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cjensen
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Baffle tie rods...I'm baffled.

Post by cjensen »

How is everyone getting the steel tie rods for the under cylinder baffles threaded???

I've got mine cut to length, and was trying to thread the first one today...busted it. The rod twists, work hardens, and SNAP! Yes, I am using lube, and the correct 6-32 thread nut...so now I have to find at least one more piece of rod to replace the one I broke, and now I'm afraid to do the rest!

How did you do it?

:? :? :?
Chad Jensen
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bullojm1
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Post by bullojm1 »

Chad-

I did this just a few weeks ago. It was somewhat of a bear, but I didn't have the issues you were when using the die's to thread the rods. What is your technique for using the die? I typically do one clockwise rotation, followed by 1/2 counterclockwise rotation (to clear out the chips of metal), followed by another full clockwise rotation. Basically, you are only taking 1/2 rotation bites out of the material.
Mike Bullock
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cjensen
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Post by cjensen »

Yeppers...that's what I'm doing as well. I'm even getting the guys in the shop to scratch their heads on this one. Shouldn't be this tough, so something isn't right...I'm just pissed that I have to get another piece of steel rod to finish now. I suppose I can use something from Ace Hardware's aviation dept. though...
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smithhb
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Post by smithhb »

Chad, I busted my first one too and it ruined my expensive dye. I saw another neat solution involving tying the baffle ends with safety wire. Works great!
Image

I ran the tristed safety wire through a section of tubing as seen here...
Image
Bret Smith
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Brantel
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Post by Brantel »

A ton of people use safety wire. Put a washer on the outside of the hole and loop the wire thru that.
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cjensen
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Post by cjensen »

Good thinkin' guys!

:good job: :thumbsup: :thumbsup:
Chad Jensen
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Bob Barrett
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Post by Bob Barrett »

Safety wire has worked well for me. I used some nylon tubing to keep it from rubbing which seems to be holding up okay. I had the lower cowl off to change oil a couple of weeks ago and everything was okay. We now have 58 hours on N 784TB since its first flight on 5/9/09. :) :) :)

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cjensen
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Post by cjensen »

Done! Safety wired...took a bit of figuring, and a phone call to the one and only Jeff Swords, but we got it!

Image

Image

:yay: :yay: 8)
Chad Jensen
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hydroguy2
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Post by hydroguy2 »

gee, I think I can do that. looks good and functional, too.
Brian
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Brantel
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Post by Brantel »

Chad,

Your gonna want to put some nylon tube over that wire to keep it from eating into the baffles and oil returns.....
Brantel (Brian Chesteen),
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cjensen
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Baffle tie rods...I'm baffled.

Post by cjensen »

Hehe...I knew someone would mention that! ;o) Already done, pics were taken before tubing was installed...

Sent from Chad's iPhone

On Sep 4, 2009, at 5:18 AM, RB Lists - Aircraft Engines <support@rivetbangers.com (support@rivetbangers.com)> wrote:



Chad,

Your gonna want to put some nylon tube over that wire to keep it from eating into the baffles and oil returns.....



Brantel
RV-7/TU, #72823, N159SB Reserved
Misc. Finishing, FWF, Wiring and Panel Work...


rivetbangers.com - Discussion topic http://www.rivetbangers.com/forums/viewtopic.php?p=30882#30882

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