Singer HA-1 User Manual
Instruction
Manual
For generic HA-1
15 class
Sewing Machines
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Your HA-1 Sewing Machine
This is a generic instruction manual for straight stitch
sewing machines that are commonly known as HA-1s.
The HA-1 machine is mechanically a clone of the very
old Singer 15 class, such as the 15-30 or 15-87. Many
later 15 class Singers, such as the 15-91, used a different shuttle/bobbin case arrangement which was mostly
reversed from this style. However, this early style became so prevalent that Singer eventually switched back
to the earlier arrangement.
HA-1 machines have been sold with hundreds of different nameplates, but are all essentially the same.
Most of the HA-1 machines have been built in the far
eastern countries since the end of WW2. There have
been numerous modifications, but the basic machine
has remained so similar that this instruction book will
cover the important points for many machines.
The bobbins are the common 15 class, and the needles
are known as 15X1 (US), 705 (H or B, European), or
HAX1 (Japanese or other far eastern), followed by the
# that designates the size. A US size 16 = a European
size 100, size 14 = size 90, size 12 = size 80. The European # tells the actual size of the needle, such as the
100 is 1mm in dia., the 80 is .8mm in dia., etc.
Prepared by:
Bill Holman
Madison, WI
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TO REPLACE THE NEEDLE
To replace the needle, raise
the needle bar to its highest
point by turning the hand
wheel (Fig. 3) TOWARD
YOU by hand. Loosen the
needle clamp screw (A) on the
right hand side, and the needle
clamp will open, allowing the
old needle to slip out.
Remove the old needle and
slide the new needle up,
(FLAT SIDE TO THE
RIGHT) as far as it will go.
When the needle hits the stop,
it is positioned correctly.
Tighten the needle clamp
screw securely. For best results change needle frequently.
Note: Use only
15X1, 705, or HAX1
class needles.
NEEDLES AND THREAD
Never use a bent needle, nor one with a blunt point, since this
causes imperfect stitches and may cause the needle to break.
Unless the needle is in all the way, flat side to the right, the machine will not function correctly, and you will not get good results.
The size of the needle should conform to the size of the thread,
and both should be suitable for the material being sewn. In most
applications, use the same thread top and bottom, and always use
good quality thread and needles.
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THE BOBBIN CASE
Important
In the following operations, the needle must always be
above the surface of the
machine. In
raising the
needle, always turn the
hand wheel
toward you.
REMOVING THE BOBBIN CASE
Slide or lift the access plate. (Fig. 4) With left thumb and forefinger, open the hinged latch (A-Fig. 2) on the bobbin case, and hold
securely as you withdraw it from the post. (D-Fig. 2) *Note the
position of your fingers on the latch, because it is important to grip
it the same way when reinserting it into the machine.
INSERTING THE BOBBIN CASE
After installing the bobbin in the case, grip the latch with your fingers in the same position* as when you removed it. (Note: If you
grip it with your fingers pointed directly toward the case, it will be
difficult to install it in the machine.) Guide the bobbin case back
onto the post with the finger (B-Fig. 2) into the notch (C-Fig. 2).
This should be an easy operation requiring no force. When you
release the latch, it will snap onto the groove on the post, and the
three or four inches of thread hanging free from the bobbin case
will be brought up through the needle plate as shown on page 8.
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WINDING THE BOBBIN
Note: This machine uses standard
15 class bobbins. The bobbin can
also be wound while the machine
is in operation by not releasing the
stop motion knob as described below, in which case, machine and
bobbin winder will operate at the
same time.
While holding the hand wheel with the left hand, turn the stop motion knob toward you. This will permit the hand wheel to turn
freely while the needle bar remains still. Place a spool of thread on
spool pin (A). Pass the thread through the tension disk (B) at right
corner of the base of the machine. Attach the thread to an empty
bobbin by winding it around numerous times or inserting it inside
out through one of the holes. Place the bobbin on spindle (C).
Push the bobbin winder (D) down until the snaps against the hand
wheel, and finger (E) drops between the sides of the bobbin. Operate the motor until the bobbin is full or the finger (E) snaps up and
disengages the bobbin winder. Do not over fill the bobbin
thread, and tighten the stop motion screw while holding the hand
wheel. Your bobbin is now ready to be inserted in the bobbin case
(pg. 6) and installed in the machine (pg. 4).
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. Cut the
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