![]() The adjustment principle of the bottom tension is similar for all Singer machines whether they use the vibrating shuttle boat type bobbin case (VS, 28, 128 etc.), the horizontally mounted removable bobbin case ( 15, 221, 222, 301) or the oscillating shuttle carrier with drop in bobbins ( 66, 99, 201 etc). The need to adjust the bottom tension therefore mainly applies only to second hand machines you are not used to, or if the bobbin holder is changed for some reason. Under normal circumstances the bottom tension does not change in use, so once set correctly it should not have to be checked again. The bottom tension MUST be correctly set BEFORE the top tension is adjusted. ![]() The calibration of tension on Singer sewing machines is quite straight forward, but it does have to be performed in the correct order. ![]() This article kindly submitted by Charles Day How to Adjust Tension on Old Singer Sewing Machines How to Adjust Tension on Old Singer Sewing Machines Singer Sewing Info
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