Bobbin Winder Hub with Friction Wheel - Part Number 320.236.20

The Bobbin Winder Hub with Friction Wheel is an essential replacement component for specific Bernina home sewing machines that is responsible for winding thread onto the bobbin. The integrated friction wheel provides the necessary tension and control to ensure that bobbins are wound evenly and consistently for smooth sewing.

Function and Purpose:

• Winds Thread Evenly: As the sewing machine's handwheel rotates, the friction wheel on the hub engages with it, transferring power to spin the bobbin. When the thread is guided through the machine's tension disc and onto the bobbin, this system ensures consistent and even thread distribution
• Ensures Proper Tension: The friction wheel is a critical part of the mechanism that controls the speed and tension of the thread as it winds. Proper tension is key to preventing loose or unevenly wound bobbins, which can lead to stitching problems later on
• Automatic Stop (Machine Dependent): On compatible machines, the bobbin winder mechanism often has a stop latch or sensor that automatically disengages the winder when the bobbin reaches a certain fullness, preventing overfilling

Compatible Bernina Models:

• Bernina 7 Series: 707, 730, 732, 740, 750
• Bernina 8 Series: 800, 801, 801S, 802S, 803S, 807, 808, 809, 810, 811, 817, 819, 830, 831