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Old 12th Apr 2013, 9:49 am   #26
Radio Wrangler
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Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 13,431
Default Re: Copying a control knob by moulding

That sounds very good, but for brass inserts, this is where you need a little lathe. You don't even need a screwcutting facility for this job so one of the little 'toy' jobs would be fine.

Things like a bakelite knob with the inner collar cracked, you can just turn out the broken collar section, machine up a big brass piece to fill the space, araldite it in, then drill and tap the grub screw hole straight down the original hole.

Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
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