Tension Discs Set of 2, Tension Unit,Singer (Vintage Original) thread making sure that your stitches

making sure that your stitches are small and even

the extra long shaft absorbs the torque

with some estimating their production numbers to be as low as 16

The decal got put in the wrong spot

Tension Discs Set of 2, Tension Unit,Singer (Vintage Original) thread making sure that your stitchesThese are the discs in the tension unit that the upper thread goes through. These discs need to be free of oil, lint, and dust, so that there is no obstruction in the thread path, or variation in tension. They come in a set of 2. Look under the video tab if you need to know how to put the tension unit together, or if you are unsure about what piece you need.