problem identifying thread
problem identifying thread
(OP)
I have an impeller with an internal thread. A thread pitch gauge for Whitworth 55° 11G-5/8 fits fine. The inner diameter is 123.8 mm or 4.874" (4 8/7?). I searched the internet for Whitworth thread tables but they all stop at smaller diameters.
Can anyone give a hint?
Thanks in advance,
Can anyone give a hint?
Thanks in advance,





RE: problem identifying thread
At that odd size it might be made to a print.
Chris
Chris
"In this house, we obey the laws of thermodynamics." Homer Simpson
RE: problem identifying thread
http://www.sizes.com/tools/thread_whitworth.htm
RE: problem identifying thread
Check out a British Standard Pipe Parallel thread 4 1/2" dia. The inner diameter is 122.772mm according to the table, which is about 1mm away from where you are now. This is assuming a full threadform.
Here is a link to a thread table http://mdmetric.com/tech/thddat7.htm
B.E.
RE: problem identifying thread
Sorry for the late reply. I was on hollydays.