Engine cradle plating?

Information relating to the Matchless G80 or AJS Model 18 500cc Heavyweight.
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Engine cradle plating?

Postby rcousine » Tue Oct 10, 2017 11:20 pm

Hello all, back with more fun questions about my 1958 CS.

There’s a pair of stamped plates that hold the engine, transmission, and generator together, and there’s another stamped and bent plate that the magneto perches on.

All of these look like they are plated; does anyone know by what process, eg chrome, nickel, cadmium, zinc?

I’m thinking of getting them re-plated, and want to know what would be correct.
1958 AJS 18 CS (a work in regress)
Ongoing rebuild photos: https://www.icloud.com/sharedalbum/#B16GWZuqDGvT59n

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Re: Engine cradle plating?

Postby Rob Harknett » Tue Oct 10, 2017 11:23 pm

Black paint as far as I know.
Ashampoo_Snap_2017.10.11_00h25m23s_001_.png
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Re: Engine cradle plating?

Postby GOLDSTAR » Wed Oct 11, 2017 7:13 am

when I got the parts for my bitsa CS there were alloy engine plates in the box so I used these, I'm pretty sure thry had been fabricated by the p/o and I would agree with Rob originally they would have been steel and enamelled. kind regards

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Re: Engine cradle plating?

Postby rcousine » Thu Oct 12, 2017 1:10 am

Thanks all! Mine look plated and unpainted, but I’ll take a closer look, and whatever I do, at least I know what’s normal. Of course, they also look welded from two pieces, and that seems odd...
1958 AJS 18 CS (a work in regress)
Ongoing rebuild photos: https://www.icloud.com/sharedalbum/#B16GWZuqDGvT59n

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Re: Engine cradle plating?

Postby cbranni » Thu Oct 12, 2017 5:39 pm

I have been told from a reliable source that butt welding of engine plates was normal for CS models around this year.

Colin
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Re: Engine cradle plating?

Postby rcousine » Tue Oct 31, 2017 6:22 pm

Thanks for all the advice, I think the powdercoater did a nice job:

powdercoated-s.jpg
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1958 AJS 18 CS (a work in regress)
Ongoing rebuild photos: https://www.icloud.com/sharedalbum/#B16GWZuqDGvT59n

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Re: Engine cradle plating?

Postby Mick D » Wed Nov 01, 2017 8:43 am

Hi

Don't underestimate the greater thickness of powder coat over traditional enamel - there can be six to eight layers of coating in a joint amounting to 3 - 4 mm additional total thickness, if you don't remove the powder coat from the mating surfaces you may find the fasteners are now too short, you can also introduce alignment problems.
I re-protected the areas where I removed the powder coat with 'Japlac' black enamel.

Regards Mick

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