Home > VansAirForceForums

- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

Old 12-12-2017, 07:17 AM
N329JR's Avatar
N329JR N329JR is offline
Join Date: Dec 2014
Location: Sharpsburg, MD
Posts: 57
Default Is there a tool for this ???

Does a tool exist that can be used to burnish / polish the sealing nose of a 37 fitting?
I have an AN833-6D bulkhead fitting that is installed and encapsulated in cured tank sealant. Apparently during my installation process, I inadvertently introduced a circular scratch in the sealing face of the fitting while torquing the bulkhead nut. I know that I could use a DEL Fitting Seal for this application, but it still seems prudent to attempt to burnish or polish out the scratch in the 37 sealing face. My interweb searches have yet to uncover such a tool. If one does not exist than I suppose that I will polish out the scratch by hand.
Thanks in advance for any input based on experience with a similar situation.
I am of course trying to avoid major rework including tank sealant removal.
RV-6 (Dad's RV)
RV-8 Empennage 95%, Wings 95%, Fuse 2%
2019 VAF Gladly Paid
Reply With Quote
Old 12-12-2017, 08:28 AM
Raymo's Avatar
Raymo Raymo is offline
Join Date: Nov 2014
Location: Richmond Hill, GA (KLHW)
Posts: 2,007

I think you could use a piece of flared tubing (maybe over-flared) and some fine Emery cloth or similar to carefully buff out the scratch.

Also, consider calling Tom at TS Flightlines for an expert opinion.
RV-7A - Slider - N495KL - First flt 27 Jan 17
O-360-A4M w/ AFP FM-150 FI, Dual PMags, Vetterman Trombone Exh, SkyTech starter, BandC Alt (PP failed after 226 hrs)
Catto 3 blade NLE, FlightLines Interior, James cowl, plenum & intake, Anti-Splat -14 seat mod and nose gear support
All lines by TSFlightLines

"The object of the game, gentlemen, is not to cheat death: the object is not to let him play."
Patrick Poteen, Sgt. U.S. Army
Reply With Quote
Old 12-12-2017, 09:18 AM
Ron B. Ron B. is offline
Join Date: Nov 2007
Location: Yarmouth, Nova Scotia
Posts: 2,278

There are little thin seals that you can purchase that go between both parts for situations like yours. ACS use to carry them. Just looked them up they call them Del fitting seals.
Thanks Ron
RV-14 Flying
Reply With Quote
Old 12-12-2017, 09:21 AM
Don Patrick's Avatar
Don Patrick Don Patrick is offline
Join Date: Feb 2010
Location: GTA, Ontario
Posts: 762
Default Here
RV-8 build

2018 donation contributor.
Reply With Quote
Old 12-12-2017, 09:49 AM
TS Flightlines TS Flightlines is offline
Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 2,297

Del Seals---Spruce, and others have them.

Tom Swearengen, TS Flightlines LLC, AS Flightlines
Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7 Tail Kit Completed, Fuse started-Pay as I go Plan
Ridgeland, SC,
Reply With Quote
Old 12-12-2017, 09:55 AM
N329JR's Avatar
N329JR N329JR is offline
Join Date: Dec 2014
Location: Sharpsburg, MD
Posts: 57

Thank You guys!
That just confirms that everyone is in agreement that I can safely use the DEL Fitting Seals with confidence.
I may try to cautiously burnish out a bit as well first.
Building On.
RV-6 (Dad's RV)
RV-8 Empennage 95%, Wings 95%, Fuse 2%
2019 VAF Gladly Paid
Reply With Quote
Old 12-12-2017, 07:01 PM
VA Maule VA Maule is offline
Join Date: Apr 2016
Location: Bucking ham, Virginia
Posts: 157

Very fine Valve lapping compound + very straight flaired tubing + close fitting alinememt pin / dowel + patience + drill with a steady hand.

Probably lot easier just to get some DEL seals.
Maule MXT-7(daily flyer)
Lancer 235(partner)
Raidial RV-8R Ephanage Done, Wings Done, Fuselage on it's tall Grove gear & engine hung
Reply With Quote
Old 12-13-2017, 05:05 AM
bobnoffs bobnoffs is offline
Join Date: Jul 2012
Location: n. wi
Posts: 606

fwiw i had a fitting leak and continued after fiddling with torque on fitting. i already had del seals on hand so i used one and leak stopped .
i think i would try one before changing the mating surfaces of the fitting.
Bob Noffs
n. wi.
dakota hawk/jab 3300 built and flying. sold 6/18.getting serious about the 12.
RV-12 kit as of 9/13
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -6. The time now is 11:42 AM.

The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.