General > General Technical Chat
What bolt type please?
jpanhalt:
The Whitworth profile is a very good profile, particularly for fine threads, threads in cast iron, and threads in stamped sheet metal. It is still used. In fact, a have a modern, made in China horizontal bandsaw with a Whitworth thread 1/2" bolt. Another use is by the Royal Microscopical Society for microscopes (https://threadingtoolsguide.com/en/blog/thread-in-microscopy-the-microscope-object-thread/#:~:text=RMS%2DGewinde,indicated%20in%20inch%20or%20inch ).
There really is no need to take a gratuitous dig at any system that is not metric.
Uunoctium:
left = UNC 8/32
right = M5
jpanhalt:
Is that a coarse M5? Those threads are nowhere nearly the same. I would expect a 0.8 mm to be closer (1/32 = 0.794 mm).
Uunoctium:
An very useful site in German for imperial screws.
http://www.astro-electronic.de/screws.htm
(I ordered there a lot of different types to complete an Gigatronics RF sweeper - previous owner threaded in housing all what he found on his workbench :palm:. And with help of the hints from this site all of the new ones fit!)
At bottom:
"Wie kann man ein unbekanntes Gewinde bestimmen?"
(How to determine an unknown threading)
Ian.M:
--- Quote from: jpanhalt on June 23, 2022, 06:59:00 pm ---There really is no need to take a gratuitous dig at any system that is not metric.
--- End quote ---
My comment "read this and weep!" wasn't intended to denigrate non-metric threads, but was intended to point out the large number of different standardized thread systems that have been in use in the UK in the past century or so, making quick identification without precision measurement tools far from certain. Then you've got the problem of sourcing the part, in the UK, in whatever thread you've identified . . .
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