JJN Report post Posted August 12, 2018 When I look at Juki sewing machine specifications for thread capabilities I see other thread size values that I cannot find any reference or comparison to. I have looked at the charts referred to here on LW but I do not see these measurements systems. #50 to #8 and Nm120/3 to Nm30/3 is equivalent to B33 to B92 and. #40 to #5 and Nm90/3 to Nm20/3 is equivalent to B33 to B138 (#50 and #40 both equal to B33) Does anyone have a full scale conversion chart of the '#' system and the 'Nm' system used by Juki? Quote Share this post Link to post Share on other sites
Wizcrafts Report post Posted August 12, 2018 When you see a thread size like (digits)/3, it is describing a 3 cord cotton or polyester, or polycore garment thread. Then there are spun silk thread sizes. These measurements, especially the Japanese NM system do not correlate to bonded thread sizes in any direct manner. For a full explanation, read this page on SuperiorThreads.com Quote Share this post Link to post Share on other sites
JJN Report post Posted August 12, 2018 Thanks for that link @Wizcrafts. I may have to read it a couple more times but that is an excellent article on the subject. I have to remember the world is not all bonded nylon and polyester. I have been reading on this forum daily for the last few months and I am getting a good education about industrial sewing. Thanks to everyone for sharing their knowledge and experience. Quote Share this post Link to post Share on other sites
brmax Report post Posted August 12, 2018 (edited) I like that article and did go there first. In looking around for a more extended cheat sheet I seen this thread chart and it seems to have several separated columns, and interesting they are but also confusing a bit. Good day Floyd http://www.amefird.com/wp-content/uploads/2009/10/5-Thread-Size-Comparison-Chart-2-4-10.pdf Edited August 12, 2018 by brmax Quote Share this post Link to post Share on other sites
JJN Report post Posted August 12, 2018 @brmax, I too looked at those charts earlier. I agree they are a bit confusing. I think it comes down to this, each machine has a range of needle sizes it is designed for. You need to use a thread with a diameter suitable for the needle eyelet you are using. I just picked up a Juki DLN-9010A-SH and it doesn't give any thread sizes in it's specifications, only the needle range of 20 to 23 although I am currently using an 18 needle with 69 thread just fine. I suppose it can handle 69 to 138 thread based on the needle sizes. Quote Share this post Link to post Share on other sites
brmax Report post Posted August 12, 2018 Yes, I agree totally keeping within the machines needle specification. I believe some listings or columns are typical and historical for certain manufacturing. It is a big business for sure and now regions of the global interest are more educational for us all. Sounds like your enjoying the new machine. A big congratulations on that ! Floyd Quote Share this post Link to post Share on other sites
