5 + Form 30-341 G (1167)
INSTRUCTIONS
and LUBRICANTS co INGER NE
They insure freedom from lubricating trouble and give
e 2126140 2126 141
The following are the correct lubricants for this machine:
TYPE A — MANUFACTURING MACHINE OIL, LIGHT GRADE
When an oil is desired which will produce a minimum of
stain on fabrics, even after a long period of storage, use:
TYPE C — MANUFACTURING MACHINE OIL, LIGHT GRADE
OTHER SINGER’ LUBRICANTS
TYPE Е — THREAD LUBRICANT
For lubricating the needle thread of sewing machines for
stitching fabrics or leather where a thread lubricant is
required.
TYPE F — MOTOR OIL
For oil lubricated motors and plain bearings in power
tables and transmitters.
NOTE: All of the above oils are available in 1 quart,
1 gallon and 5 gallon cans.
BALL BEARING LUBRICANT
This pure grease is specially designed for the lubrication
of ball bearings and ball thrust bearings of motors and
electric transmitters, ball bearing hangers of power tables, TE
etc. Furnished in 1 Ib. and 4 Ib. tins. 2126 141
Primed in Western Germany Form 30-341 G (1167!
YA Trade Mark of THE SINGER COMPANY Copyright (0) 1967 by The Singer Compan:
DESCRIPTION
Machine 212G140 has two needles and two belt-driven rotary
sewing hooks on a vertical axis. It has a compound feeding me-
chanism consisting of a needle feed and a drop feed which are
simultaneously adjustable for stitches up to six to the inch, and is
designed for lock stitching overalls, coats, corsets, brassieres and
other work requiring a compound feed.The machine is furnished in
gauges from 1/32 to 1-1/2 inches as ordered.
Machine 212 G 141 is the same as the 212 G 140, except for the
feed reversing mechanism which can be either hand or foot operated
at the will of the operator.
SETTING UP
Fasten the drip pan to the table with its left end even with the
left end of the cut-out. Fasten the knee lifter bracket in the location
shown in Fig. 2, assembling it so that the lifter rod A does not
strike the drip pan. The screw slots in the bracket provide the neces-
sary adjustment. The stop stud B, Fig. 2 should be set to stop the
action of the knee lifter os soon as the presser foot is raised enough
to trip the hand lever. Then attach the oil jar D, as shown in Fig. 2.
ws 5 y NU «<<
B
£29484
Fig. 2. Knee Lifter, Drip Pan and Oil Jar in Position
The speed recommended for these machines is 4000 R.P.M., de-
pending on the material being stitched. It is advisible to run the ma-
chine 500 RPM slower than maximum speed for the first 100 hours.
TO OIL THE MACHINE
When the machine is received from the factory, it should be
thoroughly cleaned and oiled.
Use “TYPE A” or “TYPE C” OIL, sold by Singer Sewing Machine
Company. See inside front cover of this book for description of
these oils.
Before starting the machine, remove the two oil gauges E, Fig. 3,
and fill the oil reservoirs in the sewing hook saddles to the full
mark on the gauges. It may not be necessary to add oil to these
reservoirs every day. However, the oil level must be checked DAILY
and kept to the full mark on the gauges.
E N E como
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F
Fig. 3. Showing Gauges for Oil Reservoirs
Oil should be applied at points E and F, Fig. 3 and G, Fig. 4
and as indicated by “OIL” Fig. 24. When machine is in continuous
use, the oil level should be checked twice a day.
Fill oil reservoir located on top of arm through oil filler hole G,
Fig. 4, to high mark on oil sight F, Fig. 4.
The 212 G 140 and 212 G 141 machines are fitted with the dynamic
head-end lubrication device which makes it unnecessary to manually
control the flow of oil.
CAUTION: The pump action must be absolutely free of rubbing
and has been set for .006 inch between the housing and pump weight
at the factory.
ET r a
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Fig. 4. Oiling Points on the Machine
TO REGULATE OIL FLOW TO HOOK RACEWAY
It is very important to always check the amount of oil received
by the hook raceway. To do this, first remove the bobbin case. Now,
start the machine and hold a small piece of white paper near the
hook for 15 seconds. Remove the paper and a small spray of oil
should be visible. If no oil spray shows, check the oil level in the
hook saddle reservoirs. Tip the machine back, away from the
operator, and loosen the oil control valve set screw G3, Fig. 19.
Return the machine to its upright position. Turn the oil control valve
screw M, Fig. 5 to the right for more oil or to the left for less oil.
fm emer ee ome
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Fig. 5. Sewing Hook Oil Control Valve Screws
After each adjustment, a short test run should be made. This
“short run is advisable to allow the additicnal increase of oil to
flow through to the oil wick. For decreasing the flow of oil, the
short run will allow the excess oil to disperse. After each adjust-
ment, the oil control valve set screw G3, Fig. 19 must be securely
tightened.
NEEDLES . . .
The correct type—
As you know, the needles you use have a very direct effect on
the quality, strength and appearance of the stitching produced by
your machine. From the standpoint of efficient machine perform-
ance, the proper needle is just as necessary as many of the parts
inside your machine.
That's why it's so important—for best sewing results and for
trouble free operation—to use only the Singer needles recommended
here:
Catalogue 1901 (135 x 7) in Sizes 12, 14, 16, 18, 20, 22 and 24
For corset work—
Catalogue 1903 (135 x 11) in Sizes 12, 14, 16, 18 and 20
In selecting a needle of the right size among sizes shown—
whether in standard or chromium finish—-the eye must be large
enough to allow the thread you are using to pass through freely
without binding or chafing. A simple test is to thread a short length
of sewing thread through the needle eye, hold the thread taut in
a vertical position and twirl the needle about the thread. If the size
is correct, the needle should slip down the thread easily.
Check for damaged needle—
To avoid poor stitching and possible damage to your machine,
check your needles frequently.
THREAD . . .
Use left twist thread for both needles. Either left or right twist
thread may be used for the bobbins.
Fig. 6. How to Determine the Twist
Hold the thread as shown above. Twirl the thread over toward
you between the thumb and forefinger of the right hand; if left
twist, the strands will wind tighter; if right twist, the strands will
unwind.
7
TO SET THE NEEDLES
Turn machine pulley over toward you until needle bar moves up
to highest point. Loosen the set screws in the needle holder and put
the needles up into the holder as far as they will go. Be certain the
inside needle, or the one nearest the upright part of the arm, has
its long groove toward the left, and the outside needle, or the one
farthest from the upright part of the arm, has its long groove
toward the right, the eyes of both needles being directly in line
with the machine bed. Now, tighten the set screws.
UPPER THREADING
Outside Needle:
Pass thread from left spool through threading points on un-
winder to machine. Continue threading through threading points 1
through 13. Pass thread from right to left through eye (14) of
outside needle.
Inside Needle:
Pass thread from right spool through threading points on un
winder to machine. Continue threading through threading points A
through N. Pass thread from left to right through eye (0) of inside
needle.
10
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Fig. 6A. Upper Threading
Draw about three inches of thread through the eye of each
needle with which to begin sewing.
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8
TO REMOVE THE BOBBINS
Draw out the slide plates in the bed of the machine. Turn the
machine pulley over toward you until the needle bar moves up to
its highest point. Place the thumb or finger under the bobbin case
latches, raise the latches and lift out the bobbins, as shown at
N, Fig. 8.
TO WIND THE BOBBIN
(See Fig. 7)
Fasten bobbin winder to table with its driving pulley in front
of machine belt, so that the pulley will drop away from the belt
when sufficient thread has been wound upon the bobbin.
E24972A
Fig. 7. Winding the Bobbin
Place bobbin on bobbin winder spindle and push it on as far
as it will go.
Pass thread down through thread guide 1 in tension bracket,
around back and between tension discs 2. Wind the end of thread
around bobbin a few times, push bobbin winder pulley over
against machine belt and start machine.
When sufficient thread has been wound upon the bobbin, bobbin
winder will stop automatically.
If thread does not wind evenly on the bobbin, loosen screw A
in tension bracket and move bracket to the right or left as required,
then tighten the screw.
The amount of thread wound on the bobbin is regulated by the
screw B. To wind more thread on the bobbin, turn the screw B
inwardly. To wind less thread, turn the screw outwardly.
Bobbins can be wound while the machine is stitching.
9
TO REPLACE THE BOBBINS AND THREAD THE BOBBIN CASES
The following instructions apply to both bobbin cases.
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Fig. 8. Threading Bobbin Cases
Hold bobbin between thumb and forefinger of right hand, the
thread drawing on the bottom from left to right, and place it on
centre stud of bobbin case. Push down latch N, as shown in Fig. 8.
Draw the thread into slot 1 in edge of bobbin case and back of
projection 2, leaving a loose end of thread about two inches Jong
above the slide. When closing slides, leave just enough space for
threads to pass through.
TO PREPARE FOR SEWING
Hold the ends of the
needle threads with the | |
left hand, leaving them I
slack from hand to Su
needles. Turn machine AN
pulley over toward you
until needles move down
and up again to their
highest point, thus catch-
ing the bobbin threads.
Draw up the needle}
threads and the bobbin «> a
threads will come up — 0
with them through holes ee]
in the feed dog (see — | ;
Fig. 9). Lay threads back
under presser foot and Fig. 9. Drawing Up the Bobbin
close the slides. Threads
of
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10
TO COMMENCE SEWING
Place material beneath presser foot, lower presser foot and
commence to sew.
TO REMOVE THE WORK
Have the thread take-up lever at the highest point, raise the
presser foot, draw the work back and cut the threads close to the
material. Lay ends of threads back under the presser foot.
TENSIONS
The needles and bobbin threads should be locked in the centre
of the thickness of the material, thus:
Fig. 10. Perfect Stitch
If tension on the needle thread is too tight, or if that on the
bobbin thread is too loose, the needle thread will lie straight along
the upper surface of the material, thus:
Fig. 11. Tight Needle Thread Tension
If tension on the bobbin thread is too tight, or if that on the
needle thread is too loose, the bobbin thread will lie straight along
the under side of the material, thus:
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Fig. 12. Loose Needle Thread Tension
11
TO REGULATE THE TENSION
The tensions on the needie threads are regulated by the two
thumb nuts Q, Fig. 14 at the front of the tension discs on the front
of the machine. To increase the tension, turn these thumb nuts over
to the right. To decrease the tension, turn the thumb nuts over to
the left.
Tensions on the bobbin threads are regulated by means of the
screw nearest the centre of the tension spring, on the outside of
each bobbin case. To increase the tension, turn this screw over to
the right. To decrease tension, turn the screw over to the left.
TO REGULATE THE LENGTH OF 5STiTCH
The number of stitches per inch is stamped on the machine
pulley Fig. 4 located on the armshaft.
To change the length of stitch, press down the plunger J, Fig. 4
in the bed of the machine, at the same time slowly turning the
machine pulley until the plunger enters a notch in the adjustable
feed eccentric cam. Still holding the plunger, turn the machine
pulley over a part of a revolution until the desired number of
stitches per inch on the machine pulley is opposite the reference
mark K, Fig. 4 on arm, then release the plunger.
THE FEED REVERSING MECHANISM
To reverse the direction of feed, press down the feed reversing
handle 4, Fig. 4 and the work will feed toward you. Release the
handle and the work will feed away from you.
For foot operation of reverse feed mechanism, connect the feed
reversing treadle chain to the feed reversing lever. F3, Fig. 24
underneath the bed of the machine.
TO REGULATE THE PRESSURE ON MATERIAL
The pressure on the material is regulated by the screw P, Fig. 13
acting on a flat spring, at the back of the machine. To increase
the pressure, turn this screw downward. To decrease the pressure,
turn this screw upward. The pressure should be only heavy enough
to enable the feed to move the work along evenly.
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NOTE: The instructions on following pages are for Service Repre-
sentatives only.
THREAD CONTROLLER
The function of the thread controller spring is to hold back the
slack of the needle threads until the point of each needle reaches
the goods in its descent. Without the controlling action of this spring,
the slack thread (especially silk) will sometimes be penetrated by
the point of the needle as the needle is descending.
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R S
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Fig. 14. Adjustment of Thread Controller
To change the thread controller stop for more controller action
on the threads, loosen the set screw R, Fig. 14 and turn the thread
controller spring stop to the right. For less action, turn the thread
controller spring stop to the left. Securely tighten the set screw R
after making adjustments.
It may be found advisable to increase the tension of the spring
for coarse thread, or to lessen it for fine thread.
To increase the tension of the thread controller on the threads,
loosen the tension stud set screw $5, Fig. 14, located nearly under
the tension stud and, with a screw driver, turn the tension stud T
slightly to the left. To decrease the tension, turn it to the right.
Retighten the stud set screw S.
TO SET THE NEEDLE BAR
There are two lines across the needle bar about two inches
above the lower end. When the needle bar is at its lowest position,
the upper mark should be just visible at the end of the needle bar
frame. Be certain the needles are up in the holder as far as they
will go.
In case the needle bar is not correctly set, loosen the needle
bar connecting stud pinch screw U, Fig. 15 and place the needle
bar in the correct position as directed above. Retighten the screw U.
14
TO SET A NEEDLE BAR WHICH HAS NO MARK. Set the feed ec-
centric so there is no feeding motion. Now, set the needle bar so
that when it rises .080 inch from its lowest position, and the points
of the sewing hooks are at the centres of the needles, the eyes of
the needles will be about 1/16 inch below the points of the hooks.
RELATIVE POSITIONS OF NEEDLE BAR
AND PRESSER BAR
The distance between the needle bar and presser bar, after
adjusting the feed eccentric so there is no feed movement, should
be 17/32 inch as shown in Fig. 15.
If the distance between the
needle and presser bars is more or
less than 17/32 inch, loosen the
needle bar frame shaft clamp screw
N2, Fig. 20. While the screw is
loose, the needle bar frame can
be moved forward or backward,
as required, until the distance be-
tween the needle and presser bars
is 17/32 inch. A piece of sheet
metal 17/32 inch wide may be
used to determine the correct dis-
tance. When making the adjust-
ment, be sure to see that the feed
eccentric is set so there is no feed-
ing movement. When adjustment
has been made, securely tighten
screw N2,
Fig. 15
TO SET THE SEWING HOOKS TO OR FROM THE NEEDLES
The points of the hooks should run as close to the needles
(within the scarf) as possible.
Turn machine pulley over toward you until the points of the
sewing hooks are at the centres of the needles. Loosen the four
screws V,V and W,W, Fig. 16 underneath the bed of the machine.
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Fig. 16. Adjustments Underneath the Machine
Move the hook saddles to the right or left, as required. Securely
tighten the four screws V,V and W,W.
CAUTION: Make sure hook driving gears X, Fig. 16 are set
correctly with relation to face of hook saddle. Use .005 shim.
The function of the needle guard E2, Fig. 18 which is attached
to the bottom of the sewing hook, is to prevent the point of the
hook from striking the needle if, the needle is deflected toward
the hook.
The needle guard can be bent with a small pair of pliers until
it prevents the hook point from striking the needle, but it should not
be bent outward enough to deflect the needle from its normal path.
TO TIME THE SEWING HOOKS
Adjust the feed eccentric to 8 stitches per inch.
Remove the Throat Plate and turn the machine pulley over
toward you until the lower mark across the needle bar is just visible
at the end of the needle bar frame on the upward stroke of the
needle bar. If the needle bar and sewing hooks are correctly timed,
the point of the right hook should be just even with the front on
operator side of the right needle, and the point of the left hook
should also be even with the front or operator side of the left needle.
CENTRE OF
NEEDLE NEEDLE NEEDLE
МАС
A
| SZ
“<< FRONT OF MACHINE
HOOK POINT
Fig. 16A
In case the sewing hooks are not correctly timed, turn the
machine pulley over toward you until the needle bar has descended
to its lowest point and has risen until the lower timing mark across
the needle bar is just visible at the end of the needle bar frame.
Loosen the two screws J, Fig. 16 in the hub of each hook and turn
the hooks until the point of each hook is positioned as shown in
Fig. 16A.
PES UREA
E ESE
16
TO REMOVE BOBBIN CASES FROM SEWING HOOKS
Remove four hook gib screws Y, Fig. 17 from the sewing hooks.
Lift off hook gibs, Fig. 18 and remove bobbin cases A2, Fig. 17.
CAUTION: Always equip this machine with chrome plated bob-
bin cases.
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"ON R2 Y F2 A2 R2 № P2
Fig. 17 Fig. 18. Sewing Hook
Removed from Machine
Showing Hook Washer
TO REMOVE SEWING HOOKS FROM MACHINE
Remove presser foot, throat plate and feed dog. loosen two
Allen set screws B2, Fig. 18 in hub of hook and lift hook off end
of shaft. To remove hook shaft, first remove screws in ball bearing
retaining cap directly under the hook. Next, tip machine back and
loosen set screws C2, Fig. 19 in hook shaft gears and lift hook
shaft by top end. If shaft does not lift out easily, loosen screws in
cover plate of hook saddle sufficiently to permit oil to drain out.
Now, remove cover, being careful not to damage the gasket D2,
Fig. 19 and tap end of hook shaft.
CAUTION: Each hook is equipped with a screw in the hub for
adjusting the vertical position of the hook relative to the throat
plate seat. When replacing or installing new hooks, care must be
taken to see that the bobbin case stop finger fits correctly in the
throat plate. If it is too high, it will interfere with the free passage
of thread.
If it is too low, it is apt to slip out and cause damage to the
hook and bobbin case when the machine is in operation. To make
adjustment, remove the cloth washer in the bottom of the bobbin
case. Loosen the Allen set screws in the hook hub. Turn the hook
until the adjusting screw appears beneath one of the holes in the
bottom of the bobbin case. Hold the hook down against its seat
with one hand, and with the other hand, turn the adjusting screw
with screwdriver until the proper up and down position is attained.
Tighten Allen set screws in hub of hook.
To remove the ball bearing from the hook shaft, rest bearing
on two pieces of sheet metal across the open jaws of a vise with
the shaft end up. Tap shaft until bearing is removed.
17
TO ADJUST THE BOBBIN CASE OPENER
The bobbin case opener F2, Fig. 17 should be set so it touches
the bobbin case as lightly as possible, yet turns the bobbin case
enough to make a sufficient opening for the free passage of thread
between the throat plate and the bobbin case.
TO ADJUST TIMING OF BOBBIN CASE OPENER
Turn machine pulley over toward you until lowest timing mark
on needle bar is even with end of needle bar frame. In this position,
the mark N2, Fig. 17 on the flange of the opener driving shaft,
should line up with the reference mark P2, Fig. 17 on hook saddle.
If opener shaft is out of time, tip machine back and loosen set
screws Q2, Fig. 19 in opener driving gears. Return machine to up
right position and turn shaft with screwdriver in screw R2, Fig. 17
at top end of shaft. Tighten set screws Q2, Fig. 19 in gears.
E250394
G3
TO ADJUST THE FEED ROCK SHAFT BEARINGS
The feed rock shaft is carried in split bushings which can be
adjusted to take up any wear which may occur. Loosen the two lock
screws G2 and H2, Fig. 25 and turn in the two adjusting screws J2
and K2, Fig. 25 until all lost motion of the rock shaft has been
eliminated. Securely tighten the lock screws G2 and H2.
, 18
TO RAISE OR LOWER THE FEED DOG
Usually when the feed dog is at its highest position, it should
show a full tooth above the throat plate.
Remove the throat plate; clean the lint and dust from between
the feed points and replace the throat plate. Tip the machine back
and turn the machine pulley toward you until the feed dog is at
its highest position. Loosen screw M2, Fig. 16 in the feed lifting
cam fork and, as required, raise or lower the feed dog. Retighten
the screw M2.
When raising or lowering the feed dog, be careful that its
underside does not drop low enough to strike the sewing hooks.
The feed dog should be set so that when the needles are down
they will be slightly in front of the centre of the needle holes
(toward the operator). In case the needles do not enter the holes
in the feed dog correctly, loosen the pinch screw $2, Fig. 25 and,
as required, adjust the feed dog. Securely tighten the pinch screw
$2, and check the relative position of the needle and presser bars
as instructed on page 14.
TO REMOVE THE NEEDLE BAR ROCK FRAME
Open face plate, re-
—
move take-up hinge stud
and take-up; see page 19.
Remove cover plate on the
front upright portion of the
arm. Loosen needle bar
rock frame rock shaft con- | N2
nection pinch screw N2, | O
Fig. 20. Pull needie bar |
rock frame with its shaft LI 0 00 и v
from machine. Fig. 20
— —
THE FEED ECCENTRIC
The feed eccentric is provided with a gib T2, Fig. 21 which
can be adjusted to take up any wear or loose motion between the
feed eccentric and the eccentric body. To adjust the gib, loosen the
two locking screws U2, Fig. 21 nearest the gib. Turn in the two
adjusting screws V2 against the gib until all play is eliminated
and the eccentric fits snugly in the slot in the eccentric body.
Securely tighten the two locking screws U2.
19
Fig. 21. Feed Eccentric
The spring W2 presses against the feed eccentric cam to prevent
it from moving out of position while the machine is operating.
The collar X2 may be moved to the right or left to change the
spring pressure. Ît should ordinarily be set flush with the end of
the hub of the eccentric body.
TO REMOVE TAKE-UP LEVER
Remove arm top cover, and loosen set screw Y2, Fig. 22.
Remove take-up lever hinge stud Z2, Fig. 15. Lift take-up lever
out through slot in top of arm A3, Fig. 22.
TO REPLACE THE ARM SHAFT
CONNECTION BELT
Remove needles to avoid damaging while machine is out of
time. Slide belt off lower pulley B3, Fig. 23. Loosen two screws
in the machine pulley. Remove machine pulley and ball bearing
which comes out with the wheel. Lift belt up and draw it around
the arm shaft through the space normally occupied by the ball
bearing.
Replace belt through the ball bearing hole. After placing belt
over the upper pulley 22, Fig. 22, replace the machine pulley. To
remove all end play from shaft, lightly tighten set screws in
machine pulley and, holding needle bar crank in place, tap ma-
20
chine pulley into posi-
tion with palm of
hand. Tighten screws
firmly. Turn machine
pulley over toward
you until thread take-
up lever is at highest
point. Turn the hook
driving shaft until ar-
row B3, Fig. 23 on the
belt pulley is in line
with mark C3, Fig. 23
on the bed. Now, with-
out disturbing either
the arm shaft or hook
driving shaft, slip the
belt over the lower pul-
ley. The feed will then C3 B3
be correctly timed with
the needle a BUY PARTS AND
CAUTION: DO NOT PINCH BELT in handling, as this will put a NEEDLES MADE BY S | N G E R
permanent kink in the wire reinforcements. Store in a cool, dark
place until installed. TO BE DOUBLY SURE...
of new machine performance, make sure that all
replacement parts and needles are precisely
TO ADJUST THE FEED REVERSING MECHANISM identical to those in new SINGER machines.
To get replacements
that are the same
as parts in new
machines...
£2504
Look for the trademark
SINGER
MACHINE 212 G 141 ONLY
The feed reversing mechanism bracket is set and pinned at the O on every package or container
factory and should never be removed or adjusted. To set the me- ® on the needle or numbered part
chanism to produce stitches of equal length in forward or reverse, Needles in containers marked “For Singer Machines” are NOT made by SINGER.
loosen set screw D3, Fig. 24. Then position the crank E3, Fig. 24 —
by trial or error, until desired results are obtained. Tighten screw - TO ALL WHOM IT MAY CONCERN:
. . The improper placing or renewal of the Trademark “SINGER” or
D3 after each resetting. The machine can also be made to make a any other of the Trademarks of The Singer Company (all of which
longer or shorter stitch in reverse than forward by the same method are duly Registered Trademarks) on any machine that has been
+ repaired, rebuilt, reconditioned, or altered in ony way whatsoever
outside a SINGER factory or an authorized SINGER agency is for-
bidden.
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