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Author Topic: Bonding metal to metal  (Read 2515 times)

BlueWotsit

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Bonding metal to metal
« on: April 26, 2010, 04:07:35 PM »

I need to reseal a piece of metal which is attached to and around the rudder post in one of my larger sail boats.

Normally I would use silver solder and a blow torch, however with this being in the depths of a wooden hulled boat, and not removeable its not a viable option.

Anyone any ideas or suggestions as to what would be an effective method of bonding, the metal strip to the metal rudder post ?

The piece of metal in question is the connecting rod to the rudder servo.

cheers
Andrew
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alan colson

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Re: Bonding metal to metal
« Reply #1 on: April 26, 2010, 04:45:55 PM »

There used to be a product called liquid metal, if it's still available this may do the job.
Alan
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nemesis

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Re: Bonding metal to metal
« Reply #2 on: April 26, 2010, 05:25:30 PM »

Hi, we used to use "belzona" to repair castings and fractures in shafts etc. I believe it was a heavily loaded metal epoxy, i think it was epoxy. You could get it in various metals and it was good. Nemesis
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uboatbuilder

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Re: Bonding metal to metal
« Reply #3 on: April 26, 2010, 06:21:44 PM »

you could try something called quicksteel its like a putty and dries rock hard we use it at work on cars for metal to metal stuff and plastic aswell its pretty good stuff not sure it would suit your purpose though but worth a try
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BlueWotsit

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Re: Bonding metal to metal
« Reply #4 on: April 26, 2010, 07:29:40 PM »

many thanks guys, sure one of these will be a solution - phew !
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Bunkerbarge

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Re: Bonding metal to metal
« Reply #5 on: April 26, 2010, 10:43:54 PM »

I'm not sure it is necessary to use a metal putty type of product.  I would simply use normal slow cure Aralite, which would be more than up to the job you are describing and a lot cheaper and easier to get hold of.
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hazmat

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Re: Bonding metal to metal
« Reply #6 on: May 07, 2010, 07:23:16 AM »

Don't know if its significant but a keel I repaired with araldite (lead bob weight, steel vane) started to 'unstick' after a while. I was told that it was due to different metal expansions.
Stuck it with metal loaded putty (car repair 'Chemical metal'), it stayed put.

Paul
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sheerline

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Re: Bonding metal to metal
« Reply #7 on: May 07, 2010, 01:44:47 PM »

I assume this is a homemade metal control horn which was fixed to the vertical rudder post. Would it be possible to remove the brass insert from a standard plastic control horn, solder it to the metal horn  and once done, use the 3mm allen screw found in the insert to lock it onto the rudder post?
I know this sounds obvious and possibly you haven't done it because you cannot access the area with your allen key , but I thought I'd throw it in the pot anyway.
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malcolmfrary

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Re: Bonding metal to metal
« Reply #8 on: May 09, 2010, 03:12:57 PM »

I assume this is a homemade metal control horn which was fixed to the vertical rudder post. Would it be possible to remove the brass insert from a standard plastic control horn, solder it to the metal horn  and once done, use the 3mm allen screw found in the insert to lock it onto the rudder post?
I know this sounds obvious and possibly you haven't done it because you cannot access the area with your allen key , but I thought I'd throw it in the pot anyway.
...Or even build a new arm from a dead 13A plug brass pin.  Easy to file, complete with handy rudder post hole, brass screw supplied.  Choice of 2 basic sizes. 
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dpbarry

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Re: Bonding metal to metal
« Reply #9 on: May 09, 2010, 03:25:25 PM »

Anyone on the site work work in any of the car body repair shops??  My brother works for one and he uses a two part epoxy to glue metal to metal.  I don't know the make of it but I assume it is a 'german' make considering who he works for.  I'll try and find out what type it is.

Declan
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hazmat

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Re: Bonding metal to metal
« Reply #10 on: May 27, 2010, 10:12:41 PM »

Product called chemical metal is good PROVIDED the two surfaces are roughed up (keyed).
If not then good old slow cure araldite
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vintagent

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Re: Bonding metal to metal
« Reply #11 on: May 28, 2010, 08:14:10 PM »

JB Weld is astonishingly good stuff.
450bhp Maserati V8 engine  "welded" with it and still holding!

Used by more classic car and boat people than would EVER admit to it!!
Regards,
Vintagent
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