The following warnings occurred:
Warning [2] Undefined variable $search_thread - Line: 60 - File: showthread.php(1617) : eval()'d code PHP 8.1.31 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/showthread.php(1617) : eval()'d code 60 errorHandler->error_callback
/showthread.php 1617 eval




Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Original Bolts & Nuts BSW/BSF
#6
My memory may not be as good as it never was (according to she who must obeyed...) but nearly some 40 years ago when I first purchased Ruby, one of the first items on my list of stuff to buy were sets of Whitworth and BSF spanners etc and was then sadly dismayed by constantly struggling to find the right spanner.
My curiosity led me to digging up info at that time I am pretty sure it was changed in WW2, I do have the original paperwork somewhere but as it is not to hand and following Parazine's comment, I have looked again this afternoon.
Now if you can believe Wikipedia.......... certain branches of industry reduced the sizes of Whitworth nuts under the designation "Auto-Whit" and these were formalised by the British Engineering Standards Association in 1929 as standard no.193 (original Whit standard no.190 and BSF standard no.191)
It then goes on to say "....during WW2 the smaller hexagon size was adopted more widely to save metal and this usage persisted thereafter."
The piece then goes on to say that it is common today to encounter a Whitworth hexagon which does not fit a nominally correct spanner.
Reply


Messages In This Thread
RE: Original Bolts & Nuts BSW/BSF - by John P - 02-07-2023, 08:15 PM
RE: Original Bolts & Nuts BSW/BSF - by Parazine - 03-07-2023, 12:49 PM
RE: Original Bolts & Nuts BSW/BSF - by Denis Sweeney - 03-07-2023, 04:24 PM
RE: Original Bolts & Nuts BSW/BSF - by Chris KC - 03-07-2023, 04:51 PM

Forum Jump:


Users browsing this thread: 1 Guest(s)