10
Thread tension on the Master Tools Cub is
controlled primarily from the Upper Thread
Tension. As needed, turn the Tension Assembly
Nut
(A)
clockwise to tighten the tension or
counterclockwise to loosen the tension.
(Figure 24)
ADJUSTING THREAD TENSION
ADJUSTING BOBBIN TENSION
Figure 24
Figure 25
A
A
Important Note:
The bobbin tension rarely needs adjusted, even when using varying sizes
of thread. The rule of thumb is that the bobbin thread tension is always less than the upper
thread tension.
TO ADJUST TENSION
(Figure 25)
1) Loosen Lock Screw
(B)
. Failure to loosen lock screw may result in a broken screw or
damage to the bobbin case.
2) Turn Adjusting Screw
(C)
clockwise to tighten tension or counterclockwise to loosen tension.
3) Tighten Lock Screw
(B)
when proper tension has been established.
Correct
Needle and bobbin threads
are equally drawn into
material resulting in a
perfect stitch.
Wrong
When the knot is on top of
the material, the top tension
is likely too tight. Turn
Tension Assembly Nut
(A)
counterclockwise to
loosen tension.
Wrong
When knot is on the bottom
of material, the top tension
is likely too loose. Turn
Tension Assembly Nut
(A)
clockwise to tighten tension.
B
B
CC
