SINGER
211W155
Nw
SERVICE MANUAL
FOR
SINGER
211W155 machine
Single Needle
High Speed Lock Stitch
THE SINGER COMPANY
*A Trademark of THE SINGER COMPANY Printes in U
DESCRIZTION
Machine 211W155 is a single =eedle, lock stitch, compound fee:
-achine with alternating pressers Zor autcmobile work, tents, tar-
zaulins, furniture upholstery, leather coats, work gloves, etc.
It has a bel:-driven, rotary sewing hook on a verticalaxis.
The compound feeding mechanism consists of a needle feed and =
drop feed which are simultaneousi7 adjustable for stitches up to
3 1/2 to the inch.
An adjustable lifting eccentric makes 1s possible to instantl
set the alternating pressers to the minimum amount of lift require
for the work to be sewn.
The machine has a safety clutch which prevents damage to the
sewing hook or interference with its timing in case of accidental
strain.
The needle bar stroke is 1-5/16 inches and the maximum presser
par lift is 1/2 inch.
The pulley ends of the arm shaft and hook criving shaft are
mounted on ball earings.
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SPEZD
The maximum speed recommended for this machine is 3500 R.P.M.
per minute, depending on the material being stitched and thickness
of the seams to be crossed. It is advisable to run a new machine
slower than the maximum speed for the first few minutes to allow
time for the oil to reach the moving parts. The Machine Pulley
turns over toward the operator.
NEEDLES
Needles for Machine 211W155 are Catalog 3355 (135x17) and are
made in sizes 12, 14, 16, 18, 20, 22, 23 and 24.
The size of the needle to ke used should be determined by
the size of the thread which must pass freely through the eye of
+he needle. If rough or uneven thread is used, cr if it passes
with difficulty through the eye ci the needle, the successful
use of the machine will be interzared with.
CAUTION
After setting up, do not start -he machine, not even to test
the speed, until = has been thorcughly oiled, as instructed below.
TO OIL THE MACHINE
To insure easy running and prevent unnecessary wear of the
parts which are in movable contact, the machine requires oiling,
and when in continuous use, it should be oiled at least twice
each day. A new machine should be oiled more frequently when 1t
is in continuous use on long runs.
Use "TYPE G" OIL sold by Singer Sewing Mzchine Company.
FILL THREAD LUBRICATOR -
RESERVOIR WITH —
SINGER” NV Ш
THREAD LUBRICANT
SATURATE WICK
àli :
ON TYPE E |
WHEN MACHINE
IS RUNNING Л
———] TR —
OFF (CHECK TWICE DAILY)
—
WHEN MACHINE
iS IDLE |
FOR LUBRICATING PAD Reservoir in Arm
MORE
THREAD
LUBRICANT
Lubricating Machine =ead
HOOK LUBRICATION
Oil should be placed in the oil well
(P) to lubricate the upper hook bearing and
the mechanical opener mechanism.
The small green felt pad (Q) on the
side of the bobbin case should be kept wet
with oil to lubricate the hook race. When
this pad is wet it appears nearly black,
and when it appears light green == indicates
that it is dry. When a machine is new, oil
should be applied to this felt pad each time
a bobbin is replaced.
Hook Lubrication
TO SET THE KNEE LIFTER TO THE INSERT
Turn the insert table over with the underside up, then
arvroximately 7 inches from the right edge of the insert, fasten
ne auxiliary base plate A to the 1nsert, then fasten the rock
shaft bracket B tc the auxiliary base plate. Slide the rock
shaft bracket C, with the extension arm, on to the iong shaft;
next fasten the rock shaft support 5racket D to the insert.
Slide the knee plate arm bracket E on the end of the short shaft
and tighten the lock screw; next insert knee lifter arm F in
bracket E and tighten the lock screw. Place the knee lifter
arm bracket G, on the arm F and tighten lock screw.
To adjust the extension arm in the bracket C, loosen the
top lock screw and move arm forward or backward until the lift-
ing chain moves freely through the hole in the insert.
=
THREADING NEEDLE
Threading Tension Assembly
BEHIND BOBBIN REMOVAL
OIL PAD
Upper Threading Complete
- LIFT OUT BOBBIN
WINDING THE BOBBIN
TENSION CONTROL
/
1. PLACE BOBBIN ON
SPINDLE AS FAR
AS IT WILL GO
OIL
LOOSEN TO
ADJUST FOR
EVEN WINDING
2. WIND THREAD
AROUND BOBBIN
NOTE-TIGHTEN FOR MORE THREAD ON BOBBIN:
Regulate to stop winder when bobbin is wound
1/16 inch short of bobbin rim
3. PRESS DOWN
TO PUSH PULLE
AGAINST BELT, ~
THEN START
MACHINE
BOBBIN REF_ACEMENT
1. PLACE BOBBIN ON CENTER STUD
DIRECTION OF THREAD
AROUND BOBBIN
THREADING BOBBIN CASE
DRAW THREAD TO
PULL THREAD BACK OF PROJECTION
INTO SLOT
DRAW THREAD UP
TWO INCHES
TO SET THE NEEDLE
Turn the machine pulley over Toward you until the needle bar
moves up to its highest point; locsen the set screw in the needle
bar and put the needle up into the bar as far as it will go, with
its long groove toward the left, the eye of the needle being dir-
ectly in line with the machine bed, then tighten the set screw.
TO REGULATE THE TENSIONS
The tension on the needle threzd is regulated zy the thumb
nut (R,Fig. 18) at the front of the tension discs on the front of
the machine. To increase the tension, turn this thumb nut over
to the right. To decrease the tension, turn this thump nut over
to the left.
The tension on the bottom thread is regulated zy means of the
screw nearest the center of the tensicn spring on the outside of
the bobbin case. To increase the tension, turn this screw over
to the right. To decrease the tension, turn this screw over
to the left.
STITCH LENGTH REGULATION
l. Stop machine.
2. Depress button shown
3. Turn machine pulley toward
you slowly — until button
drops (clicks).
4. Turn machine pulley until
desired stitch length is
opposite marx on arm
5. Release button.
Stitch Length
Indicator
Never depress the button while
the machine is running. LS ых
Make certain that plunger 1s - se
disengaged before starting BUTTON
machine. |
Stitch Lenzth Button Regulator
THREAD CONTROLLER
The function of the thread controller spring is to hold back
the slack of the needle thread until point of needle reaches the
goods in its descent, as without this controlling action of the
spring, the slack thread (especially silk) will sometimes De
penetrated by point of needle as needle is descending.
To change the thread controller stop for more controller
aczion on the thread, loosen set Scrzw Z, and turn thread control-
ler spring stop T, to the right; fcr less action, turn thread
controller spring stop T to the Тейт, after which securely tighten
set screw 4.
Tt may be found advisable to Increase tension cI spring
for coarse thread, or to lessen it Zor fine thread.
To increase tension of thread controller on thread, loosen
tension stud set screw Y, located nearly under tension stud, and
turn tension stud A2 slightly to the left. To decrease tension
tun it to the right. Re-tighten szud set screw Y.
Adjustment of Threa: Controller
TO SET NEEDLE BAR
See that needle is up in the holder as far as it will go.
There are two lines across the needle bar about two inches above
the lower end. When needle bar is at its lowest position, the
upper mark should be just visible zt end of needle par frame.
In case needle bar is not correctly set, loosen needle bar
ccnnecting stud pinch screw M and ctlace needle bar in correct posi-
tion as directed above, then re-ticaten screw M
TO SET A NEEDLE BAR HICH HAS NO MARK
Regulate the stitch length as Instructed so that there 1S no
ceding motion, then set needle bar so that when iT rises 3/32
inch from its lowest position and zoint of sewing hook is at
center of needle, eye of needle wil be about 1/16 inch below
point of hook.
RELATIVE POSITIONS OF NEEDLE SAR AND PRESSER ZAR
The distance between the needle bar and presser bar (after
regulating stitch length so that there is no feed movement) should
be 21/64 inch as shown below.
If the distance between needle bar and presser bar is more
or less than 21/04 inch, loosen needle bar frame shaft clamp
screw N2. Wiile this screw is loose needle bar frame can be moved
forward or backward, as may be required.
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| N2 \
To Adjust Needl2 Rock Frame
©
TO CHANGE AND REGULATE THE AMOUNT OF LIFT Or THE
ALTERNATING 2XRESSERS
The height of lift of the pressers is adjustable by moving
the link to either of the two holes in the lifting rock shaft
crank at the back of the machine. The maximum lift is secured with
the link in the bottom hole. The amount of lift should be regula-
ted according to the thickness of the material being sewn. The
feet should lift just high enough to clear the material.
The regulation of the amount c£ lift is controlled by an ad-
justable eccentric. To regulate, Zurn the machine pulley until
the feed presser is down, loosen the two lock screws and two clamp
ing screws in the eccentric, hold screwdriver in the notch of
the adjusting disc and, while the ccrewdriver is in the notch,
turn machine pulley, clockwise for more 1lift or counterclockwise
for less lift.
= em ее —
‚ р)
CAUTION: When desired lift is attained, secursly tighten
the two clamping screws and their locking screws. As a rule,
the vibrating and lifting pressers should lift an equal
height, but some grades of worx may require that they lift
an unequal height. To change the relative Lift of the
presser foot, loosen the screw in the lifting rock shaft,
at the back cz the machine anzZ move the vibrating presser
bar upward or downward as deszred, then securely tighten the
lifting rock shaft screw.
TO SET THE SEWING HOOK TO OR FROM THE NEEDLE
To prevent the point of the hook from dividing the strands of
the thread, it should run as close to the needle (within the
scarf) as possible.
Turn the machine pulley over toward you until the point of
the sewing hook is at the center cI the needle. Icosen the two
screws holding the hook saddle uncerneath the bed cz the machine
and move the hook saddle to the right or left, as may be required,
until the point of the hook is as close to the neecle as possible
without striking it, then securely tighten the two screws.
The needle guard "B", which is attached to the side of the
sewing hook should be sprung until it prevents the needle from
striking the hook in case the needle is deflected towards the
hook.
Sewing Hook Removed from Machine
Showing Hook Washer
TO RAISE OR LOWER “HI FEED DOG
Usually when the feed dog is z= its highest position, it
should show a full tcoth above the throat plate.
Remove the throat plate; clean the lint and dust from be-
e T
tween the feed points and replace the throat plate; tip the
machine back and turn the machine zulley towards ycu until the
feed dog is at its highest position; loosen the screw in the feed
1:fting cam fork on the feed bar and raise or lower the feed dog,
as may be required and retighten the screw.
Waen raising or lowering the feed dog, be careful that
its underside does not drop low enough to strike the sewing hook.
TO REMOVE THE SEWING HOOK FROM THE MACHINE
Remove the bed slide, throat plate, feed dog and bobbin case
gening lever, then tip the machine pack and loosen the two screws
in the hub of the hook shaft gear znd lift out the sewing hook.
SAFETY CLUTCH
The safetv clutch 1s adjustable to suit sewing conditions and
protects hook from damage resulting from accidentzl strain.
Should any foreign matter clog the hook, this new type safety
ciutch will disengage itself and will re-engage oniy after area
has been cleared.
This safety clutch has been set at the factcry at proper
torque setting and must not be disturbed.
THE FEED ECCENTRIC
Feed eccentric is provided with a gib
P2 which can be adjusted to take up any
wear or loose motion between feed eccentric
and eccentric body. To adjust gib, loosen
ско locking screws O2 against gib until all
play is eliminated and eccentric Zits snug-
iy in slot in eccentric body. Securely tight-
an two locking screws QZ.
Spring R2 presses against feed eccen-
zric cam to prevent it frommving out of
position while machine is operating. Collar
$2 may be moved to right or left <o change
spring pressure. It should ordinarily be
set flush with end of hub of eccentric body.
TO REPLACE ARM SHAFT CONNECTION BELT
Remove needle to avoid damage while machine is out of time.
S1:de belt off lower pulley X2. Loosen two SCrews in machine
puiley and remove machine pulley ans ball bearing waich comes
our with the pulley. Lift belt up =16 draw it around arm shaft
through space at M2, normally occuried by ball bearing.
Replace belt through ball bearing hole at M2. After placing
beit over upper pulley T2, replace machine pulley with ball bear-
ing. To remove all end play from chaft, lightly tighten set
screws in machine pulley and (holding needle bar crank in place)
tap machine pulley into position with palm of hand. Tighten
machine pulley set screws firmly.
Turn machine pulley over toward you until thread take-up
lever is at its highest point. Then turn hook driving shaft until
the "B" setting mark at Z2 on safety clutch in pulley X2 is in
line with mark Y2 cut into machine zed. Now, without disturbing
either arm shaft or hook driving staftg, slip belt over lower pulley.
The feed will then be correctly timed with needle.
NOTE: Safety clutch in lower belt pulley X2 has been set
at factory for correct torgua and must not be disturbed.
“a?
Feed Eccentric
To Replace Arm Shaft Connection Belt
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