Bernina No Tension RED Bobbin Case is required when using thicker threads in the Bobbin. Allows the thicker thread to flow freely.
When you are going to be playing with heavier thread look for the Red Bobbin Case. This bobbin case give the ultimate freedom – there is no tension screw/spring. All tension is controlled from the top. It is specifically designed for use with heavy decorative threads. Think heavier embroidery floss, perle cotton, ribbon.
This is a good time to hand wind your thread (ribbon, floss) onto the bobbin. Just make sure whatever you’re using for bobbin work is wound on properly. Please do not try to wind on using the bobbin winder! It doesn’t work!. The thread or floss can untwist in a most unseemly manner.

Compatible Machines

B990, B790 PRO, B790 PLUS Crystal Edition, B 790 PLUS, B790, B770 Plus Kaffe Edition, B770 QE PLUS, B770 QE TULA PINK Edition , B770 QE, B735, B720, B700, B590 Crystal Edition, B590, B570 QE Kaffe Edition, B570 Tula Pink Edition, B570 QE, B535, B 475 QE Kaffe Edition, B475 QE B435.