Monday, 16 July 2012

Plating

So, I've started plating some Bantam parts using a 4 Amp 6V/12V battery charger and Gateros Bright Zinc kit - £59. for enough lit to make two 4.5 litre tanks. I wanted to clean up the rusty fasteners & clutch adjuster on the outside of the engine.

I started by running a die along all of the fasteners to clean the red Hermetite out of the threads. Then they went in a caustic soda electrolytic bath, followed by a rinse.

Then it's a minute in a 30% hydrochloric acid solution (brick cleaner from B & Q), and straight into the plating tank. It's a struggle to get the voltage right with a rudimentary controller in the form of a coil of resistance wire, but the results are passable - especially as I was really looking for a cadmium plate look-alike, not shiny zinc.

Here are a batch of parts in the plating tank:


And here they are again after about 20 minutes:


A 'before & after' shot:


So having tested that out, onto some more valuable (read scarce) parts. These are the steel parts from Amelia's Solex 26 AHD in the tank. Same process as before:


And here they are after plating. They are still attached to their handling wires here, but they have been  in the clear passivating solution for about 60 seconds.
And here is the carburetter assembled. All the brass has been cleaned with Farecla G3 compound, a toothbrush and a brass wire brush in the Dremel. It all looks to be in nice condition though it will need a new set of seals and some parts from David Jones, including the air bell, the Bi-Starter knob and it's bracket.

The other thing I need is to find out what the cable bracket looks like, if there was an adjuster, and where the throttle return spring goes... anyone got one I can copy?


A pleasing distance from the 'before' shot from last week!








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