Measuring Pitch Of Thread

Once again thanks to everyone, this has been a great learning lesson to me. I ordered a thread gage but it will be some time before I will get it. I did not want to wait till then. So, I decided to reconfirm the thread measurement I had made. I used two more dial indicators and carefully made the measurements once again. I rotated the adapter in its threads carefully one turn each time and noted down the DI reading. In the end I collected some 40 measurements. Made an excel file and calculated the average value. The result was 36 TPI. Obviously my initial measurement was not very accurate.

Next I went ahead with the thread cutting. It came out great. The parts mated perfectly.

Lesson learnt: Never trust/believe a single measurement using a DI taken on loose moving parts like what I did. Take many readings and average the result. That will minimize error.

Thanks everyone again,
Prasad
Wynnewood PA
 
Thanks royesses although I all ready have a small one I like that one better,just order,thanks
 
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