A few weeks ago it became clear why I was having issues with Bobbin tension, even after\u00a0 fitting a new spring to the bobbin carrier. I lifted the carrier out of the machine to change thread, and a part of the carrier fell off. It was obviously fatigued across the area where the thread passes through the shell and under the tension spring, hence the variable tension problems.<\/p>\n
Replacing the bobbin carrier with the same part number is impossible without importing it from overseas at great expense and postage costs. However the best alternative bobbin carrier for a 306K is the version for the Singer 20U industrial machine, and this is available in NZ for a very small cost and local postage.<\/p>\n
When fitted, the machine works fine, and 15×1 needles still work as before, as well as the 206×13 and the DBx1 needles. And as a bonus, the spring adjustment screw from the damaged carrier was transferred to the 15K110 which was missing one!<\/p>\n","protected":false},"excerpt":{"rendered":"
A few weeks ago it became clear why I was having issues with Bobbin tension, even after\u00a0 fitting a new spring to the bobbin carrier. I lifted the carrier out of the machine to change thread, and a part of …<\/p>\n