Reply To: How to remove set screw without damaging threads?
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I’d have to agree with the others – think twice before trying to move that threaded rod. It will have been machined in (ie drilled, tapped and the rod threaded into place) – not incorporated into the cast as someone has suggested – that would have been too difficult for a foundry. The thread looks good – almost pristine, to use one of Paul’s favorite terms! Maybe put some penetrant oil down the thread into the housing to soften up any corrosion that might lurk – but don’t remove it.
I’d also like to try to dispel that myth about plane components having strange and unusual threads – manufacturers like Record would have used whatever was commonly available for machine threads. There is a website which has a list of the common threads on ordinary bench plane components in a table about half way down the page – I have inserted the url.
http://www.recordhandplanes.com/parts-and-sizes.html
It does not have any of the threads on special purpose planes like the ploughs combination and shoulder planes, but I suspect that they were not unusual at all. I will contact the guys in the traditional tools group listed at the bottom of the website page and they may have more information nowadays.
Cheers
Mark H