Singer 257 M-55 User Manual

3.9.4
Upper and
Lower Loopers
3.9.5
Needle and
Needle Guard
3.9.6
Chain Looper
and Needle
When the upper and lower Ioopers
are crossed, the distance is 0.2 mm
for ’A’ and 0.5 mm for ’B’, accord-
ing figure 20.
When the looper point is on the
side opposite to the center line of
the needle (left needle if there are
two needles), space between nee-
dle and rear needle guard of 14’ is
0 mm. When needle moves to the
lowest position, space between
needle and front needle guard of
’B’is from 0.15 to 0.20 mm, accord-
ing to figure 21.
The safety looper should be fixed in
a position lower than this support.
And when it moves to the left far
end, the distance between the loop-
er point and the center line ofneedle
is 2.5 mm, according to figure 22.
0.5
A
0.2
. //
__ /
/_'\_
Figure 20
0.0
A
0.15 - 0.20 mm
In!“
M?
Figure 21
Figure 22
High Speed Overlook Machine | Instructions Manual and Parts List
15

Singer 257 M-55 Specifications

General

Brand	Singer
Model	257 M-55
Category	Sewing Machine
Language	English