flight clothing, nylon, twills, and lightweight
canvas.
111 W 151 Sewing Machine
The 111 W 151 sewing machine is also a single-
needle, lockstitch, rotary hook machine, intended
for high-speed straight stitching of medium heavy
materials.
The 111 W 151 sewing machine differs from
other models of the class 111 machines in that it
has a single presser foot instead of the alternating
presser foot.
111 W 152 Sewing Machine
The 111 W 152 sewing machine is a single-
needle, lockstitch, compound feed machine with
a vertical axis sewing hook. This machine has
alternating pressers with a 3/8-inch lift. It has a
safety clutch that prevents the hook from being
damaged or getting out of time due to accidental
strain.
111 W 153 Sewing Machine
The 111 W 153 sewing machine is similar to
the 111 W 152, but it is used for sewing heavy
work such as automobile and truck upholstery,
tents, awnings, and leather flight jackets.
111 W 154 Sewing Machine
The 111 W 154 sewing machine is also similar
to the 111 W 152, but its alternating pressers have
a lift of 1/2 inch, and the machine is designed for
stitching upholstery work, leather coats, and
binding heavy materials such as felt padding.
111 W 155 Sewing Machine
The 111 W 155 sewing machine is similar to
the 111 W 154 except that its minimum stitches
per inch is 3 1/2, and it has an adjustable lifting
eccentric for instantly setting the alternating
pressers to the minimum amount of lift required
for the work to be sewn.
FUNCTIONAL FEATURES
The oiling parts for class 111 sewing machine
are shown in figure 9-24A. Figure 9-24B identifies
239.448
Figure 9-24B.—Class 111 sewing machine, front view showing components and parts.
9-19
