Securing smokebox number plate

Securing smokebox number plate

This topic has 4 replies, 5 voices, and was last updated 14 February 2025 at 22:58 by duncan webster 1.

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14 February 2025 at 11:34 #783174
Derek Drover
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@derekdrover32802
I have obtained a brass numberplate for my 5″ L1, to go onto the smokebox door, but I’m worried about how to secure it. I have a hole already in the door to take a 5Ba screw, so I’m considering soldering a brass countersunk screw to the back of the brass plate using Comsol.

My worry is the temperature the smokebox could get to when running.. will the Comsol hold ??

How have others secured theirs?
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14 February 2025 at 13:07 #783198
parovoz
Participant
@parovoz
My £0.02

Assuming the number plate is not painted, just use silver solder. Then guaranteed secure at all smoke box temps. I once saw a comsol soldered chimney band ping off due to melting. Engine was working pretty hard though….. I have also riveted this kind of stuff in place with fine 3/64″ brass rivets then carefully countersunk and dressed off a the front. Then paint it and nothing shows.
14 February 2025 at 14:36 #783204
Speedy Builder5
Participant
@speedybuilder5
Question is – how were they originally attached, I doubt cosmsol or silver solder.

Bob
14 February 2025 at 16:06 #783215
bernard towers
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@bernardtowers37738
As Paravoz use rivets fit and forget.
14 February 2025 at 22:58 #783299
duncan webster 1
Participant
@duncanwebster1
On narrow gauge locos I’ve worked on they are held on with brass screws. Possibly the only time I’d contemplate using a 12ba screw. 14 ba would be even better, but there are limits. A friend of mine who worked on full size locos reckoned 12ba was a surface finish, not a thread
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