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Stitch length
Needle size
(mm)
UYX128
#70
1.0 - 4.2
(#65 - #90)
UYX128
1.0 - 4.2
#70
(#65 - #90)
UYX128
#70
1.0 - 4.2
(#65 - #90)
UYX128
1.0 - 4.2
#70
(#65 - #90)
UYX128
#70
1.0 - 4.2
(#65 - #90)
UYX128
#70
1.0 - 4.2
(#65 - #90)
UYX128
#70
1.0 - 4.2
(#65 - #90)
UYX128
#70
1.0 - 4.2
(#65 - #90)
UYX128
#70
1.0 - 4.2
(#65 - #90)
UYX128
#70
1.0 - 4.2
(#65 - #90)
UYX128
#70
1.0 - 4.2
(#65 - #90)
Gauge No.
Gauge No.
No. of needles
-1
-2
-3
-4
-5
-6
-7
-8
Needle bar
Differential feed
stroke (mm)
ratio (mm)
31.0
0.6 - 1.4
33.4
0.6 - 1.4
31.0
0.6 - 1.4
31.0
0.6 - 1.4
33.4
0.6 - 1.4
33.4
0.6 - 1.4
33.4
0.6 - 1.4
33.4
0.6 - 1.4
31.0
0.6 - 1.4
31.0
0.6 - 1.4
33.4
0.6 - 1.4
No. of threads
2
3 or 4
2
3 or 4
2
3 or 4
2
3 or 4
2
3 or 4
3
4 or 5
3
4 or 5
3
4 or 5
Max. speed
Height of
(rpm)
presser foot
(mm)
B256
B257
7.0
5.0
6,000
6.0
5,000
7.0
5.0
6,000
7.0
5.0
6,000
7.0
6.0
4,500
7.0
6.0
4,500
6.0
4,500
7.0
6.0
4,500
7.0
5.0
5,000
5.0
5,000
7.0
6.0
4,500
Gauge (mm)
3.2
4.0
4.8
5.6
6.4
4.8
5.6
6.4
2000.7
FD4 B256, B257 3/19
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