Anti-Backlash Spring Maintenance

How to clean and replace the anti-backlash spring

The anti-backlash spring is a thin, blue disc located at the bottom of the bobbin case. The picture below shows the anti-backlash spring with the bobbin in place.

The purpose of the anti-backlash spring is to slow down the spinning of the bobbin as it first begins to sew. This reduces the formation of thread blobs on the back of the quilt. If you hold the bobbin case and gently press on the bobbin, you should notice a small movement in and out. If this movement is not present, it is an indication that the disc is worn and should be replaced.

Inserting the Anti-backlash Spring:

• Insert the tabs of the anti-backlash spring into the slots on either side of the inside of the bobbin case.
• Use tweezers to place one of the tabs in one of the slots. Repeat for the other slot. Be careful not to bend or damage the spring as you insert it.

Cleaning the Behind the Anti-Backlash Spring

The Anti-Backlash Spring should be removed periodically for cleaning as lint will collect behind it and degrade performance.