So, faced with a pile of thread of unknown origins…
What is a correct method of measuring the thread size?
I have been making a loop so that I can place two strands side by side in my calibers. I close the jaws until I feel moderate resistance. Then take a reading or three.
Using this method, I’ve been seeing 0.0045 to 0.0055 for typical home sewing machine thread. 0.007 to 0.009 for some “heavy duty” thread. And 0.012 for some C & C upholstery thread. Which I take to be Tex70.
There are others that don’t quite fit any of the standard sized listed for conventional thread types.
I bought some Tex90 from Amazon (my first mistake). Measured 0.0095. Not even close to the 0.0133. So back it went. I’m now lurking on thread exchange for some proper string.
Are there variations of thickness depending on the manufacturer and thread type as they relate to standard sizing?
So, tell me if my method is sound, and if not, what should I be doing?
I've lurked for years and learned just how much I don't know. Such a wonderful source of information. I'm a complete noobe at this, so other basic questions will follow.
Thanks for the help,
All the Best, Jeff