I’m always asking about imperial threads

[Michael GilliganParticipant @michaelgilligan61133]

Thanks for the quote, Bill

… That makes perfect sense as what the process should have been

What I was trying to imply was that maybe manufacturing shortcuts were being made; in the interests of economy, or just plain idleness. [e.g. The ‘shims’ for the nose of mine were pretty rough around the edges]

MichaelG.

Edited By Michael Gilligan on 16/10/2022 13:07:33

[pgrbffParticipant @pgrbff]

Posted by Howard Lewis on 16/10/2022 12:40:35:

My first thought, reading the comments re 1/4 BSW and M6 (MOST unlikely on a Record ) was 1/4 BSW

Are you not able to make one? (No die? )

The hexagon does not matter, except to absolute purists. It is only there to rotate the screw to provide the clamping force to hold things together.

At a pinch, could someone post pou a short piece of 1/4 BSF stud and a nut, so that the envelope is not too fat?

Howard.

I have ordered a 3/8" by 1/4"BSF screw from the Bay, sent to my sister-in-law. Just have to wait now.

[old martParticipant @oldmart]

Some of the old makers made non standard proprietry threads specifically to force users to buy their spare parts. This is common with the large indexable insert producers, yuo buy a nice toolholder and find that only the same make of inserts will fit.

[duncan webster 1Participant @duncanwebster1]

I've read somewhere that the Royal Navy used non standard threads so that if a warship fell into enemy hands they wouldn't be able to maintain it. Theses foreign chappies can't make nuts and bolts of course.

[File HandleParticipant @filehandle]

Posted by peak4 on 15/10/2022 13:13:05:

One of the above links to the article about Record planes seems to be dodgy; this one works OK
https://recordhandplanes.com/parts-and-sizes.html

For further interest, and to add to your bookmarks and downloads, see these two articles from The Traditional Tools Group
https://www.tttg.org.au/

Part 1 discusses threads in general, particularly with reference to Stanley planes.
https://www.tttg.org.au/Content/Stanley%20Planes%20and%20Screw%20Threads%20-%20Part%201.pdf

Part 2 amongst other things , refers specifically to the No.12-20 thread
https://tttg.org.au/Content/Docs/Articles/Stanley-Planes-and-Screw-Threads-Part-2.pdf

Bill

Thanks for sharing Bill, the 2 parts make interesting reading.

[Grindstone CowboyParticipant @grindstonecowboy]

Posted by duncan webster on 16/10/2022 19:34:43:

I've read somewhere that the Royal Navy used non standard threads so that if a warship fell into enemy hands they wouldn't be able to maintain it. Theses foreign chappies can't make nuts and bolts of course.

I understand the Brown Bess musket was made a larger calibre than the contemporary French service musket so we could use their ammunition, but they couldn't use ours.

Rob

[Rod RenshawParticipant @rodrenshaw28584]

I heard the the Royal Navy used no screws smaller than half inch diameter as the matelows would accidently twist the heads off anything smaller. It was probably a rumour put about by the army.

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