Superior needles are Organ needles. Janome needles are also Organ needles. The Titanium do last longer. I have JANOME MACHINES and Babylock sergers. I use Organ in all of them with no problems. I have also used Schmetz in the Janome machines with no problem. Normally, thread breakage is a NON match of the needle to the thread you are using. Other breakage can be tension, hang up of thread or just poor thread. I had a friend that was using serger thread for her quilt and was wondering why her thread was breaking. Serger thread is NOT meant for sewing. Not enough plys to make it strong for sewing use. Go to Superior Thread site and see if the DVD called Threadology is still free. It is a great video that tells you all about needles, thread and machine tension.