This part is one of the inner most components of your machine. Every needle on your machine has its own individual spot within this inner ring. On the outside of the ring are teeth to catch the gear of the handle, this is what turns your machine, and makes each needle go around!
How to Replace: See the corresponding video instruction. This part is located at the very center of your machine, you will need to remove all the exterior screws, all outer rings, and all of the needles. You will also need to carefully separate the two main sections of your machine’s body, being sure not to disconnect the wires for your counter.
Your defective ring is recyclable.