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Forum: Welding Sheet Metal 07-17-2019, 02:03 PM
Replies: 6
Views: 354
Posted By crystallographic
neutralizing aluminum gas welding flux

Specifically to the question about neutralizing AGW flux in hard-to-reach areas - I use a 25% phosphoric with either a brush or a pump spray.

(Must for Rust has been my go-to for many years)
It...
Forum: Basic questions and answers 07-09-2019, 01:37 PM
Replies: 3
Views: 437
Posted By crystallographic
Hi Bruce, I think you should put a little crown...

Hi Bruce,
I think you should put a little crown in the central area of your panel, staying back from edges about 6in all around.
Then do your #2, shrinking one edge and then the other, back and...
Forum: Individual Classifieds 06-28-2019, 02:49 PM
Replies: 3
Views: 566
Posted By crystallographic
Passed up a Marvel 20+ years ago - no room for...

Passed up a Marvel 20+ years ago - no room for it. Got a big Well Saw instead.
Marvel saws are the primo choice - but sometimes they are really worn and then need a LOT of rebuilding effort.
Forum: Introductions 06-27-2019, 01:58 PM
Replies: 3
Views: 216
Posted By crystallographic
Okay ! Great! Thanks. But - I think working...

Okay ! Great!
Thanks.
But - I think working test pieces of 6061 will not really match wing skins as they are "usually" 2024T3.
Forum: Introductions 06-27-2019, 11:24 AM
Replies: 3
Views: 216
Posted By crystallographic
Welcome Bob. From my own experience, 6061 T6 is...

Welcome Bob.
From my own experience, 6061 T6 is significantly easier to straighten than 2024 T3.
Good Luck,
Forum: General Discussion 06-23-2019, 09:01 PM
Replies: 6
Views: 549
Posted By crystallographic
Nice project. Well done!

Nice project. Well done!
Forum: Welding Sheet Metal 06-22-2019, 08:53 PM
Replies: 35
Views: 2,548
Posted By crystallographic
Add two points of friction: I use...

Add two points of friction:


I use "washer" of foam sheet on each side of the spool to lightly tension against unspooling.


And I added a 2inch length of 1/4in dia tension spring ... mounted...
Forum: Welding Sheet Metal 06-12-2019, 06:41 PM
Replies: 17
Views: 1,280
Posted By crystallographic
They were rusting in bare metal while stored in...

They were rusting in bare metal while stored in warehouses awaiting completion. Sad that they were already quietly rusting away when brandy-new. Maybe the earlier Mangustas fared better?
Forum: Automotive Projects 06-12-2019, 11:26 AM
Replies: 18
Views: 1,320
Posted By crystallographic
Very sweet job, Steve. Nice flows and lots of...

Very sweet job, Steve. Nice flows and lots of interest going in the details.
It should get a lot of attention when out on the road.
Great to see!
Forum: Welding Sheet Metal 06-11-2019, 02:59 PM
Replies: 17
Views: 1,280
Posted By crystallographic
Got a real hideous one. Custom. 53114

Got a real hideous one. Custom.


53114
Forum: Welding Sheet Metal 06-10-2019, 07:56 AM
Replies: 17
Views: 1,280
Posted By crystallographic
hmmf... Yer examples are very nice - and Not...

hmmf... Yer examples are very nice - and Not Easy.
I'm glad you joined the gang, "hack."
Out here in the West, "hack" is sorta like "schlock" and is considered less than "stellar." I'd be glad to...
Forum: Automotive Projects 06-08-2019, 06:09 PM
Replies: 7
Views: 561
Posted By crystallographic
James, that is nice tidy work - especially the...

James, that is nice tidy work - especially the corners. Good to see ----

and thanks !
Forum: General Discussion 06-06-2019, 12:19 PM
Replies: 11
Views: 980
Posted By crystallographic
At some point in a biped's life, sooner or later,...

At some point in a biped's life, sooner or later, perceived invincibility fades and is replaced by a sense of self-protection.
Bipeds are issued one each sets of hands, ears, and eyes.
Take good...
Forum: Welding Sheet Metal 06-06-2019, 12:05 PM
Replies: 35
Views: 2,548
Posted By crystallographic
BTW, "tig" rod = "gas" rod, unless it is a...

BTW, "tig" rod = "gas" rod, unless it is a particular alloy not given to gas welding.


I butt weld my aluminum rods together.... if the dia is over .063.
I just leave the short stump to go solid...
Forum: General Discussion 06-06-2019, 11:52 AM
Replies: 35
Views: 2,465
Posted By crystallographic
Only if you are using heat treatable aluminum -...

Only if you are using heat treatable aluminum - 6061, 2023, etc.
Otherwise the aluminum may only be hardened back up by working it.
This is a common problem with the old aluminum auto bodies (3003,...
Forum: Announcements 06-02-2019, 09:19 PM
Replies: 33
Views: 2,588
Posted By crystallographic
10 Years celebrating the joys of craftsmanship. ...

10 Years celebrating the joys of craftsmanship.
It's been very informative and it's been great to meet so many good folks.
Thank you!
Forum: General Discussion 06-02-2019, 09:04 PM
Replies: 35
Views: 2,465
Posted By crystallographic
Hi Robert, You have presented a good technique...

Hi Robert,
You have presented a good technique using the wood disc instead of the metal ones - which make much noise and mark the panels so badly - and which also separate and then go rolling around...
Forum: General Discussion 05-28-2019, 05:24 PM
Replies: 6
Views: 583
Posted By crystallographic
Safety should be important - over a few bucks...

Safety should be important - over a few bucks spent.
"A urethane" is not always "THE urethane" you are looking for.
"Just urethane" can be had from a hundred sources, and is a DIY deal, for sure....
Forum: Automotive Projects 05-28-2019, 03:14 PM
Replies: 5
Views: 930
Posted By crystallographic
Looks very nice and successful, John. ...

Looks very nice and successful, John.


(... conventional wisdom has frame extensions / replacements cut and welded on the 45 angle, btw, moving the active load on the weld from in-shear to...
Forum: Welding Sheet Metal 05-28-2019, 03:02 PM
Replies: 35
Views: 2,548
Posted By crystallographic
If you can't see, then you can't weld. ...

If you can't see, then you can't weld.


Bifocals, trifocals, multi-focal glasses are a complete waste of time, and effort - but a great source of frustration. So say a LOT of finally-successful...
Forum: Welding Sheet Metal 05-27-2019, 12:58 PM
Replies: 35
Views: 2,548
Posted By crystallographic
Richard, Your technique is looking better. Try...

Richard, Your technique is looking better.
Try working in 2-3inch stretches, then extend filler rod and go again.
Inner cone is a nickel thickness from the metal.
45deg angle is "average" but can...
Forum: Welding Sheet Metal 05-26-2019, 02:43 PM
Replies: 35
Views: 2,548
Posted By crystallographic
Set the flame "fat" and just below a growl. Metal...

Set the flame "fat" and just below a growl. Metal thickness = tip orifice.
Cone length = heat, so set cone length to 2 or 3 metal thicknesses.

Half a cone of feather, for the excess acet. This...
Forum: Welding Sheet Metal 05-25-2019, 10:13 PM
Replies: 35
Views: 2,548
Posted By crystallographic
Carbonation makes no difference - from many tests...

Carbonation makes no difference - from many tests I've done across the US.
(Pellegrino/Gerolsteiner also make good espresso.)
Forum: Welding Sheet Metal 05-25-2019, 08:17 PM
Replies: 35
Views: 2,548
Posted By crystallographic
Okay, good start. Now, keeping all elements the...

Okay, good start.
Now, keeping all elements the same, mix a fresh batch of flux with clean spring water - like a bottle from the store. (Not distilled.) (Not tap water.)
Forum: Basic questions and answers 05-25-2019, 04:05 PM
Replies: 19
Views: 1,438
Posted By crystallographic
Hi O.J. For "fail-safe" leadwork, the top guys...

Hi O.J.
For "fail-safe" leadwork, the top guys neutralize the flux acids after tinning and before applying the solder.
(BTW - I am Not a fan of paddling or spraying alloys at the 50-50 levels....
Showing results 1 to 25 of 2184

 
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