The 4-thread safety stitch is perfect for all types of woven fabrics ranging from fine to heavy weight fabrics. This
stitch is designed to seam and overlock the edge in one step, thus creating a garment industry standard safe-
ty stitch. As well as woven fabrics, the 4- thread safety stitch is for stabilizing knits, sweater knits and long seams
on woven fabrics.
4-thread safety stitch is a combined stitch of a 2-thread overlock using subsidiary looper on the upper looper
and a 2-thread chain stitch. The 4-thread safety stitch itself can be 3 different seam widths, depending on the
chain/cover stitch needle position.
The varied widths can then work with different types of fabrics.
For 4-thread Safety Stitch:
1. Use standard blade cover.
2. Thread the lower and chain loopers.
3. Thread one chain needle and the O-1 overlock needle (see diagram).
4. Engage the subsidiary looper in the upper looper.
5. Engage the blade to cut the fabric. Set stitch width dial at 7.5.
6. Select A on the Stitch Selector.
7. Set Wave Selector Lever on "O".
* See chart for settings of each size of 4-thread safety stitch.
C
O
M
B
I
N
A
T
I
O
N
S
T
I
T
C
H
E
X
P
R
E
S
S
I
V
E
54
4-Thread Safety Stitch
