Spare parts for class 2 machine
(cent'd)
Item identification
Quantity
Thread tension thumb nut
1
1
Sewing hook assembly
1
Sewing hook holding screw
10
Bobbin, metal
1
Bobbin, case
1
Presser foot, inside (ungrooved)
1
Presser foot holding screw, inside
Bed slide plate spring
1
Bed slide plate holding screw
1
Feed dog
2
2
Feed dog screw
2
Needle throat plate
Needle throat plate screw
2
1
Needle bar thread guide, lower
1
Needle set screw
Presser foot, outside (ungrooved)
1
Presser foot, outside, holding screw
1
Needle, round point, chrome finish
Metric sizes:
120
100
100
125
130
100
140
100
180
100
3.3 Performance.
3.3.1 Class 1 machine, operation. The class 1 machine shall be capable of
fabricating, replacing and installing lines, inversion nets and vee tabs on
personnel and cargo parachutes when tested as specified in 4.1.1 and 4.2.1.
The machine shall show no signs of stalling, pounding, shearing of threads,
failure to lock stitches, or deformation of any part during fabrication of
these articles.
3.3.2 Class 2 machine, operation. The class 2 machine shall be capable of
fabricating, repairing and installing lines and retaining loops on cargo
parachutes when tested as specified in 4.1.2 and 4.2.2. The machine shall
show no signs of stalling, pounding, shearing of threads, failures to lock
stitches, or deformation of any part during the fabrication of these articles.
5
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