SINGER 95-100 - Manual (Page 15)

13
Tensions
For ordinary stitching, the needle and bobbin threads should
be locked in the center of the thickness of the material, thus:
Fig.17. Perfect Stitch
If the tension on the needle thread Is too tight, or If that
on the bobbin thread Is too loose, the needle thread will lie
straight along the upper surface of the mterlal, thus:
Fig.18. Tight Needle Thread Tension
If the tension on the bobbin thread is too tight, or If that
on the needle thread Is too loose, the bobbin thread will lie
straight along the under side of the material, thus:
Fig.19. Loose Needle Thread Tension
To Regulate the Tensions
THE TENSION ON THE NEEDLE THREAD SHOULD BE REGULATED ONLY
WHEN THE PRESSER FOOT IS DOWN. Having lowered the presser foot,
turn the small thumb nut (C,Flg.2), at the front of the tension
discs, over to the right to Increase the tension. To decrease
the tension, turn this thumb nut over to the left.
The tension on the bobbin thread Is regulated by the large
screw (FF,Fig.ll) In the tension spring on the outside of the
bobbin case. To increase the tension, turn this screw over to
the right. To decrease the tension, turn this screw over to the
left.
When the tension on the bobbin thread has been once properly
adjusted. It Is seldom necessary to change It, as a correct stitch
can usually be obtained by varying the tension on the needle
thread.