I have a small metal to plastic Loco repair to do in an area that will be subjected to some shear stresses in both planes. The surface contact area is roughly a ‘U’ shape, about 2 mm max. width at any one point & mating surfaces are about 10mm total length if the ‘U’ was flattened out.
It needs to be jigged for a precise match up
What type of adhesive will give the strongest bond for metal to plastic??
Tanked
Tanked,
CA (cyanoacrylate) should work for you. I would go with a “thicker” CA, as this will allow you a little more working time to mate things up correctly. You’ll still need to work fairly quickly though.
Tom
I’d use some type of epoxy.
Given the stresses involved, I’d also go with epoxy. I’ve had CA fail under stress.(Not model railroad related, thankfully–only an old antique. [B)])
Very useful site. Thank you.
My query related to the disparity of the materials & that I have read somewhere that CA can let go under sideways shear
Tanked
I am partial to JB Weld for heavy duty jobs. Its usually the product that I use when CA has failed. I have yet to have it not work for what I needed. Its not the easist to apply, but it holds the best.
I would use some type of ‘5 minute’ epoxy. CA(super glue) really does not have a lot of ‘shear’ strength and I would suspect it will fail if the ‘fix’ is subject to lots of ‘motion’.
Jim
CA doesn’t have no were near the strength as 5 MINUTE EPOXY, If I need something to hold better then my only choise would be JB WELD.