I want to epoxy a 1/4" thick by 2" square aluminum piece to another 1/4" plate. Because of aluminums oxidation situation will this work. JB weld?
Epoxying aluminum
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I am presently making a height adjuster for a camera rail.
Glue certainly saves a lot of time and I hope OK on this low stress job.
I used JB Weld on the upper Al to Al joint,
and Gorilla Glue ( foaming) on the lower Al to wood joint.
Cleaned with Acetone and aimed for a bit of squeeze out all around during clamping.
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If it fails, try using a file to rough up the surfaces. That will provide the mechanical "key" for the epoxy to lock onto.
DanAt the end of the project, there is a profound difference between spare parts and left over parts.
Location: SF East Bay.
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Originally posted by Horst View PostI want to epoxy a 1/4" thick by 2" square aluminum piece to another 1/4" plate. Because of aluminums oxidation situation will this work. JB weld?
RWO
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Originally posted by RWO View PostOxidation is not the problem and you can't remove it anyway. Degrease and roughen up the two faces with very coarse abrasive paper just before you apply the epoxy and clamp snugly. JB Weld is good as any.
RWOLocation: Helsinki, Finland, Europe
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If the added block is threaded for amount, there is a way with no fasteners showing.. but tricky.
Drill 3 holes in each piece, center is a thru hole in tap size, the other 2 are for a dowel or roll pin , to a depth if say .200.
Install dowels in one side, install, clamp tight, then tap..... the remove clamp.
. It will never move.
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Where did this group get the idea that you can't use epoxy or other adhesives on aluminum?
There have been aircraft flying since the 70's that are 100% glued aluminum. (Grumman AA-1 Traveler for instance). I'm glad it works for their sake.
I have used epoxy on a number of aluminum parts.
3M Scotchweld 2216.Last edited by rzbill; 05-27-2018, 04:46 PM.Bill Pendergrass
Rotex RM-1 w/Rusnok head
Atlas TH42 QC10
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Originally posted by 754 View PostIf the added block is threaded for amount, there is a way with no fasteners showing.. but tricky.
Drill 3 holes in each piece, center is a thru hole in tap size, the other 2 are for a dowel or roll pin , to a depth if say .200.
Install dowels in one side, install, clamp tight, then tap..... the remove clamp.
. It will never move.
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It is oxidation that causes a bad bond and it happens faster than you can cover freshly sanded aluminum with the epoxy. MattiJ has it right, you put on a coat of epoxy then abrade through that layer, so the oxygen can't get to the freshly abraded surface.
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Originally posted by rzbill View PostWhere did this group get the idea that you can't use epoxy or other adhesives on aluminum?
There have been aircraft flying since the 70's that are 100% glued aluminum. (Grumman AA-1 Traveler for instance). I'm glad it works for their sake.
I have used epoxy on a number of aluminum parts.
3M Scotchweld 2216.
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