bobbin along Report post Posted February 20, 2014 I'm a recent member bad have a Consew 255rb2 machine. The manual says use up to #8 thread. This is a metric size and equates to size 346 thread and would take a 26 needle. I have sewn with 207 (with 22/23 needle) and that works OK if I sew slowly. Smaller threads will go great at a million miles/hour speed. I have a servo motor on the machine I would like to hear from anyone who can shed some light on any of the following: -Is 207 the max size for the machine -What would be the max size it would accept without a lot of mods to the machine -Does anything have to be done to sew faster with 207 -What should be max thickness leather and vinyl with 207 Quote Share this post Link to post Share on other sites
shoepatcher Report post Posted February 20, 2014 I believe the largest thread you can use comfortably with that machine is #138. You might be able to use #207 but that would require some machining to be done on the finger slot on the underside of the throat plate where the finger from the bobbin case goes. This give you the clearance for the thick thread coming around the hook and going up thru the needle hole . Anything thicker as to #138 thread just would not work properly in my opinion. I think the largest needle made in 135x17 is a 200 or #25. The other thing you have to consider is the needle hole size in the throat plate and even the inside presser foot. I think that machine will handle 3/8" of material without problems. shoepatcher Quote Share this post Link to post Share on other sites
