Bobbin Tension Meter

This Bobbin Tension Meter takes the guess work when trying to fine tune the tension on your bobbin case. For Featherweights the correct tension is 23 grams. With your bobbin threaded in the bobbin case, attach the thread tail to the clip on the meter. Gently pull on the bobbin case until the thread starts to unwind. If the meter registers @23 you are good to go. If not you will need to adjust the tension spring on the bobbin case. Refer to your operating manual for instructions.