[modeleng] Mystery thread

  • From: Harry Wade <hww@xxxxxxxx>
  • To: modeleng@xxxxxxxxxxxxx
  • Date: Tue, 20 Nov 2007 21:41:02 -0600 (GMT-06:00)

I am presently converting a 14" Rockwell wood bandsaw for metal cutting and I 
need to match the thread of a grubscrew (missing) for a David Brown reduction 
gearbox, which I assume was made in the UK.  The screw diameter measures .216" 
and the pitch is between a 24 and 28tpi but it is neither a 24 nor 28.  The 
.216" is dead-on for a US #12 machine screw but it isn't that.  Anyone have an 
idea what this thread might be?
Regards,
Harry

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