JB Weld ?
gene takae
some small steel brackets to a cast aluminum benchtop saw table. It
wont't be subjected to a lot of weight, just the vibration from the saw
itself. Will the JB Weld work for this aoplication?
Thanks,
Gene
TS
step that is easy to overlook.
Just drill and tap, and you'll be sure it will work. Forever...
Tony]
Robert Swinney
Yes! JB Weld is an excellent 2-part epoxy containing steel particles for
added strength. It does not work like "they claim" if you're referring to
the Paul Harvey radio advertisements. Paul, who probably never epoxied
anything in his life implies that all you have to do is slather the stuff on
and you have a bond. He suggests keeping some in your car for emergency
repairs; even mentions repairing a transmission case with it. Well, that
might be believable if you had ample time during the emergency, and some
acetone, or other degreaser to thoroughly clean the broken area, and let it
cure for 24 hours.
Paul Harvey claims aside, JB Weld is a great product! I use it religiously.
If you thoroughly clean (preferably with acetone) both sides of the area to
be bonded and then abraid (rough) both sides to give it "some tooth", JB
Weld makes a great bond. It performs as advertised, on the package - not by
Paul Harvey - if you follow instructions.
Many years ago, I broke a pot metal post off inside a 4 throat motorcycle
carburetor. What to do - $500 for a new carb? Naw. I wondered about JB
Weld and called the factory. I had the pleasure of talking to the then
chief engineer and founder of JB Weld. He is now deceased. The gentleman,
sez "Boy, the stuff will cure in liquid if you need, it'll even cure under
gasoline". Good news, since I wanted to use it in a carburetor. I rode
that bike for 7 years afterwards and finally sold it -- with carburetor
repair still intact.
Bob Swinney
gene takae wrote in message
<989-381...@storefull-116.iap.bryant.webtv.net>...
Spehro Pefhany
> Weld makes a great bond. It performs as advertised, on the package - not by
> Paul Harvey - if you follow instructions.
Thanks for the "rest of the story". ;-)
--
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Spehro Pefhany "The Journey is the reward"
sp...@interlog.com
Fax:(905) 271-9838 (small micro system devt hw/sw + mfg)
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David Berryhill
>Might. Most adhesives really need clean surfaces to bond properly - a
>step that is easy to overlook.
>Just drill and tap, and you'll be sure it will work. Forever...
>
I might add that you should roughen both surfaces with some coarse sandpaper
or emery cloth, then clean/degrease and apply the epoxy.
Dave Berryhill
John Kunkel
>
> Doe this stuff actually work like they claim.
It's subject to the standard law of adhesives: "If you want it to stick,
it won't. If you don't want it to stick, it will".
Robert Bastow
teenut
Red Rider
gene takae wrote in message
<989-381...@storefull-116.iap.bryant.webtv.net>...
Doe this stuff actually work like they claim. I would like to attach
some small steel brackets to a cast aluminum benchtop saw table. It
wont't be subjected to a lot of weight, just the vibration from the saw
itself. Will the JB Weld work for this aoplication?
Thanks,
Gene
JB Weld is a high strength Epoxy, and its bond strength is in the area of
4000 to 5000 pounds per square inch.
Quick setting epoxies have a bond strength in the area of 3000 to 4000
pounds per square inch.
Polyester resins, have a bond strength in the area of 2500 to 3000 pounds
per square inch.
There are other specialty adhesives, ect. that have higher bond strengths
but they cost big bucks. Several hundreds of dollars for just a few ounces
is common. But these adhesives don't fail until the basic structure fails.
RED
Grant Erwin
worth a darn until I put in a pin. JB Weld's still holding about ten years
later ..
Grant
XPRTEC
Well, Gents,
I AM the connoisseur of JB Weld! I have at minimum at least 100 tubes under my
belt. And then probably at least 16 tubes of JB Fastweld. Better not mix that
too fast or it'll harden right up into a glob right on your mixing stick!!
Things I've learned over the years.
Never speed cure with a blow dryer or torch or hot lamp until air hardened at
least 1/2 hour or it will run bad.
I have sealed split water pipes (after draining water and pressure down) by
making a ball of JB Fastweld and forming a golf ball around the pipe. Hardened
in 4 minutes. Cures rock hard overnight.
I have greased up a screw and then formed JBW around it and let it harden to
make a custom casting with threads. Doesn't work too well with small screws.
1/2 inch worked well.
When trying to adhere to something, I try drilling holes, and then let a
little go through the hole, and after it starts to set up I push the protruding
blob to flatten it out a bit, have never had one come out.
Adhesion is greatly enhanced by abrading or roughing up where you want it to
stick. GREASE absolutely kills adhesion. You have a narrow window say 5 % of
getting the mixture right. Equal parts!!! Remember. Last night I went through
4 tubes, covering and smoothing welds on a 4x6 combo saw coolant recovery
table. Welds leak, and since I am painting it, I want it to look good too.
One set of tubes I purchased absolutely had a LOT more white part than the
black in the other tube.
Some places that I have found that JBW doesn't work well are, anything with a
lot of vibration, large shock loads, or torsional twisting forces, or trying to
fix threaded holes. Trying to seal small pinholes in poly tanks or some
plastics isn't very effective, since JBW doesn't adhere to that flexible and
slick surface.
Most other things work well if you let it cure for a day or two, and have
mixed it well and with equal parts! I have used it to make small screw threads
by inserting the threaded inserts from Ace or True Value stores into the JBW
before it cures and pressing it around the ridged edges for a good tight lock.
If I can't use JBW for the application, then I get LAB METAL. It is available
at NAPA stores. It is the only thing I have ever seen that actually looks,
feels, machines like real metal! It is very expensive ($8.95 in smallest cans)
but when you compare it in volume to JBW it isn't much more. You also can use
it to "cast" small parts in metal or to make small molds to cast silicone
rubber parts.
Some of you others that have found unique uses or tales of woe, post a reply.
These products are of great use around a machine shop. My deceased
father-in-law used to say that, "wood putty has made more carpenters good, than
training!"
Jim XPR...@AOL.COM
Brian Evans
the cylinder head of his race car...repair lasts about four races, then he redoes
it.
Brian
XPRTEC wrote:
> Subject: Re: JB Weld ?
>
> Well, Gents,
>
> I AM the connoisseur of JB Weld! I have at minimum at least 100 tubes under my
> belt. And then probably at least 16 tubes of JB Fastweld. Better not mix that
> too fast or it'll harden right up into a glob right on your mixing stick!
snip...
AAsberry
>
>I AM the connoisseur of JB Weld! I have at minimum at least 100 tubes under
>my
>belt. And then probably at least 16 tubes of JB Fastweld. Better not mix
>that
>
>These products are of great use around a machine shop. My deceased
>father-in-law used to say that, "wood putty has made more carpenters good,
>than
>training!"
>
>Jim XPR...@AOL.COM
Oh Worshipful Master (kneeling of course), what would you estimate the tensile
strength of a nut 1 1/2 inch in diameter and 1 inch tall for 1/2 acme rod?
Andy
Prescription without diagnosis is malpractice. In medicine and mechanics.
XPRTEC
>Oh Worshipful Master (kneeling of course), what would you estimate the tensile
strength of a nut 1 1/2 inch in diameter and 1 inch tall for 1/2 acme rod?
>Andy
Andy,
I don't have my "black book" here, but assuming you are talking of brass, I
would assume that the tensile strength would be way beyond the capabilities of
JB Weld. In the neightborhood of 30k to 70 k tensile strength. JBW is about
2k to 3k I believe.
I am going to try to create a "nut" with acme thread by cutting a piece of
brass in half and cutting threads into it on each half, then putting the
halves together around an acme threaded shaft. Then I'll put a steel wire
around the halves to hold them to shaft and then lather JBW around it, and I
feel in this configeration it will work.
Jim XPR...@AOL.COM
Roger Duncan
aluminum radiator with it. Got it to bond real nice until the hot
coolent mix sofened it.
On Sun, 31 Oct 1999 03:14:48 -1000 (HST), gt...@webtv.net (gene takae)
wrote:
Smokin Joe
cylinders with it. It's still holding fine ( 6 years ).
Gunner
I used JB weld to glue a heart in a divorce lawyer. Still holding.
Gunner
<G>
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>>>
>>> Doe this stuff actually work like they claim. I would like to attach
>>> some small steel brackets to a cast aluminum benchtop saw table. It
>>> wont't be subjected to a lot of weight, just the vibration from the saw
>>> itself. Will the JB Weld work
>for this aoplication?
>>> Thanks,
>>> Gene
AND
>Gunner wrote
>I used JB weld to glue a heart in a divorce lawyer. Still holding.
I suggest that you put some kind of small screw to hold that JB welded part
on the saw anyway. The lawyer's heart probably never gets used anyway, so that
doesnt prove anything.
Jerry
FVet100176
polishing,plating and repairing of anything metal