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#639598 - 02/10/16 7:36 pm Re: Replating fasteners for 1959 ES2 * [Re: kommando]  
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Rohan Online content
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Originally Posted By Horror

We have confirmed that Norton used dull chrome POST-WAR as it was used on Manx Norton's.



Have we. ??
Where does it say that, or where is that documented ?
Folks that know their satin chrome might suggest that Manx Norton parts were satin chromed.

And since satin chrome doesn't require a highly polished surface for it to be applied to, it would be a pretty feeble polisher that would damage those casting numbers in any way.
Poor argument.

Perhaps we need a chemical test that can distinguish dull chrome from satin chrome. If there is a difference....

Originally Posted By Horror

Here's a picture of my gearbox linkage arm and bolt off my Manx, which was bought from Ken Mcintosh. You can see the casting marks and pits on it and it has raised numbers. This hasn't been bright nickeled, then satinised or the sharp edges of the number and the casting marks would be polished out. So this isn't satin chrome, this is dull chrome.



P.S. The words 'dull chrome' DO NOT appear in Ken McIntosh's lists anywhere. Satin chrome does though.
So if you are happy that his parts are a good match, and top quality, as they are....





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#639648 - 02/11/16 2:37 am Re: Replating fasteners for 1959 ES2 [Re: steverat]  
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Originally Posted By kommando

Before the purchase of Nortons by AMC they were owned by RT Shelly, a company making spanners etc also in Bracebridge St, so no need for Norton to have a plating shop as RT Shelly would have had their own plating facility or used a plating shop close by. At the time in Aston Birmingham a short walk would have had you falling over plating shops, not called the City of a 1000 trades for nothing.


Except that I have seen a series of factory tour photos inside the Norton works (in wartime ?), and I'm fairly sure they showed some plating tanks, and mentioned that Nortons had their own. The pics I especially remember were the enamelling ovens - they mentioned this was a cosy job in wintertime - and rather hot in summer. !

The question here too is what finish was used on the fasteners for a 1959 ES2. This was after AMC had taken control of Nortons, and economies were being imposed left right and centre - witness the common AMC gearbox. AMC had always (?) used cad plating on nuts and bolts (?), so were Nortons obliged to follow suit ? The chromed tank finish had gone, another economy - or change of style...

#639896 - 02/12/16 6:38 pm Re: Replating fasteners for 1959 ES2 [Re: steverat]  
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Unfortunately Owen, that is as stated for AMAL carburettors.
As is also stated in the AMAL literature.
Who had their own plating works, it must be noted.

What is NOT actually written, anywhere (?), is what Nortons used on their nuts and bolts.
Hearsay and chinese whispers rule here OK, but written evidence is noteably lacking.

AND, the ONLY mention (all prewar mentions, note) of dull chrome in Norton stuff is as an alternative to the usually supplied bright chrome finish. And ONLY for oil tanks and petrol tsnks and carb parts.

And, the OP asked about this for a 1959 ES2.
This is more than 20 years after prewar brochure mentions of oil tanks and AMAL carb finishes.
Not what you'd call bulletproof evidence...

There is also the amusing sidenote that various bits and pieces all look distinctly different shades of silver and chrome, when you put them all side-by-side.
So much so that you'd think they were different metals....

It may take some chemical tests to sort them all out.
I'm looking into that at the moment.
I have done some electroplating courses, so am not entirely unfamiliar with some of them.

Originally Posted By Rohan

There is also the amusing sidenote that various bits and pieces all look distinctly different shades of silver and chrome, when you put them all side-by-side.
So much so that you'd think they were different metals....


Just as a demo of this, an example of an AMAL bit compared to the hard chrome (?) on a (modern) spanner (wrench).
It is very noticeable how BRIGHT the 'dull chrome' on AMAL bits seem to be...

Now spanners/wrenches etc come in a myriad of finishes/shades, and there is probably no standard that they have to conform to.
But the comparison there is striking...
And the whole spanner, in case anyone thinks there is anything tricky about this.

(Sorry its not BSW sized).

This is not an ancient technology -- its still very much used today.


#639899 - 02/12/16 6:53 pm Re: Replating fasteners for 1959 ES2 [Re: steverat]  
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Rohan Online content
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Rohan  Online Content
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Oztralia
Quite some years ago I experimented with plating decorative chrome over matt nickel.
This is the result.



The blue tinge around the edges is the chrome overlay.
Coin is to give some scale.
Not really the same effect as dull chrome or satin chrome. !
(This one is actually a reject from the plating process, as you can see - chrome throws extremely directionally,
and this piece was rather side on, so only the sides got done...)
Since there was a very big current plating a fairly small area, the chrome got hot and turned it a bit blue.

#640196 - 02/15/16 4:30 am Re: Replating fasteners for 1959 ES2 [Re: steverat]  
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Rohan Online content
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Rohan  Online Content
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Oztralia
And perhaps as a final postscript, the bits and bobs can always be painted.



Don't laugh, I once went to look at a slimline dommie,
advertised by a Dealer as in good condition, and with a premium price.
First thing I noticed was the strange looking nuts and bolts.
Painted silver, with a fairly broad brush.....

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