T H E S I N G F__ R C O M P A N Y
Form
(865)
K6644
Printed in Great Britain
SINGER*
Sewing Machine Model 337
2
CONGRATULATIONS !
As the Owner of_a SING[R*337 Sewing Machine... you
have a dependable, smooth running zig-zag sewing machine
that is outstanding in its simplicity of operation. You can
overcast a seam, make a buttonhole or stitch a decorative
applique. Then, switch instantly to straight stitching for
seaming, machine basting, or darning.
You will find these features especially helpful
• TRANSPARENT "DROP-IN " BOB-
BIN... located in front of the needle;
• THROAT PLATE... clamp type for
easy removal; calibrated for control of seam
width.
shows thread supply at a glance.
• BUILT-IN SEWING LIGHT... pull-
• SINGLE-TURN TENSION . . . num-
down bracket for easy bulb replacement.
bered to eliminate guesswork in duplicating
settings.
SINGER SERVICE
Wherever you go you will find expert, dependable SINGER* Service close at hand. Look
under SINGER COMPANY, in the phone book, for the address of the nearest SINGER
CENTER. Here, you can obtain the services of a trained SINGER repair man, warranted
SINGER parts, sewing information and services, sewing aids and notions.
Copyright Under International Copyright Union
*A Trademark of THE SINGER COMPANY
3
PRESSURE
PRESSER FOOT
NEEDLE THREAD
TENSION
REGULATOR
THREAD CUTTER
PRINCIPAL PARTS OF
STITCH WIDTH
SELE(
L1GH'[
MACHINE 337
BOBBIN WINDER
LEVER
HAND
WHEEL
BOBBIN
WINDER
SPINDLE
STITCH
H
LEVER
THROAT
SLIDE PLA
3HT SWITCH
BOBBIN WINDER
TENSION BRACKET
TO Remove the Bobbin--
4
'HOW TO WIND THE BOBBIN
Open slide plate and lift out bobbin.
To Wind the Bobbin
5
• Place spool of thread on spool pin.
O
Loosen stop-motion screw.
STOP-MOTION
SCREW
BOBBIN WINDER
LEVER
• Thread through guide and between
bobbin winder tension discs.
• Lead end of thread through hole in
bobbin and place bobbin on spindle.
• Move bobbin winder lever to the right.
• Hold end of thread and start machine.
• Cut off thread end after a few coils have
been wound on bobbin.
.... '_'_,,_, ,,_,,,,._,,_,,_7,_-_-,,_,_%.
1 _¢_
.... i
BOBBIN WINDER
TENSION DISCS
When bobbin is full, stop machine.
Cut connecting thread about 3 inches
from bobbin.
!,
%.
D
Move bobbin winder lever to left and
remove bobbin.
Tighten stop-motion screw, as shown
above.
To Replace the Bobbin
/
Hold bobbin so that thread leads off in
0
direction shown.
6
• Place bobbin in case.
• Lead thread into slot and under spring.
Draw thread into notch at end of spring;
pull about 3 inches of thread across
bobbin.
• Close slide plate.
7
HOW TO THREAD THE MACHINE
Raise take-up lever to highest point.
'_:; !
?
i J
i /::
Lead thread
shown.
through threading points
._'_
• Thread needle from front to back.
• Draw about 4 inches of thread through
eye of needle.
8
FABRIC, THREAD,
NEEDLE
FABRICS
__ m
DELICATE---tulle, chiffon, fine lace, silk,
organdy, fine tricot
LIGHTWEIGHTBbatiste, organdy, Jersey,
voile, taffeta, silk crepe, plastic film
MEDIUM WEIGHTBgingham, percale, pique,
linen, chintz, faille, satin, fine corduroy, suitings
MEDIUM HEAVY--gabardine, tweed, sailcloth,
denim, coatings, drapery fabrics
AND STITCH LENGTH CHART
MACHINE STITCHES
THREAD
SIZES
Fine Mercerized
100 to 150 Cotton
Synthetic Thread
50 Mercerized
80 to 100 Cotton
"A" silk
Synthetic Th read
50 Mercerized
60 to 80 Cotton
"A" Silk
Synthetic Thread
Heavy Duty Merc.
40 to 60 Cotton
NEEDLE
SIZES
9
II
14
16
STRAIGHT STITCHING
(8 to 10 for plastic)
PER INCH
15 to 20
12 to 15
12 to 15
-- w
10 to 12
HEAVYmovercoatings, dungaree, upholstery
fabrics, canvas
Heavy Duty Merc.
24 to 40 Cotton
18 8 to 10
9
HOW
This machine uses needle, Catalog
2020 (15 x 1). Sizes 9, 11, 14, 16
and 18.
For perfect stitching, select correct needle
and thread to correspond with fabric
according to table on page 8. Be sure to use
like threads for both needle and bobbin.
• Raise needle bar to highest point by
turning hand wheel toward you.
• Loosen needle clamp screw.
TO INSERT A NEEDLE
NEEDLE
BAR
NEEDLE CLAMP
/
LONG GROOYE
TOWARD YO U
Insert needle upward into clamp as far
as it will go, with fiat side of needle to
back and long groove toward you.
• Tighten needle clamp screw.
10
STITCH CONTROLS
REVERSE
TO RELEASE
TO TIGHTEN
Stitch Length Lever
Numerals on either side of the lever
represent number of stitches per inch. The
higher the number, the shorter the stitch.
The area above' 20 is used for adjusting
zig-zag satin stitch length.
To set stitch length
Loosen thumb nut by turning it to the
left.
• Move lever to desired stitch length
setting.
Tighten thumb nut by turning it tO the
right.
To stitch in reverse
Set stitch length as explained above, and
raise lever as far as it will go. Exception:
When lever is in No. 6 position, it is" locked"
and thumb nut must be loosened before lever
cari be raised to reverse stitching position.
0
11
Stitch Width Selector
1234
T
i |
I
i [ l
STRAIGHT STITCH SETTING
0
The stitch width selector regula[es the swing of the needle from a straight
position 0 to a maximum zig-zag width 4 (5/32 inch).
To position, slide selector to desired setting. As the lever is moved to the right
the width of the zig-zag stitch is increased. Settings of I thru 4 are indicated but
intermediate settings may also be used.
To avoid damage to needle and fabric, do notmake any selector adjustments
with the needle in the fabric.
ZIG-ZAG STITCH SETTINGS
1 to4
0 Hold needle thread lightly with left hand.
17.
Pull end of bobbin
throat plate.
thread up
through
13
PRESSURE ADJUSTMENTS
,_,t_:_'\_'g_\ _z_%_'_
O
To decrease pressure, turn thumb
screw counterclockwise.
i!i!i
O
i!:ii. i Iti
'_,_,_'
DECREASE INCREASE
Smooth, even handling of several thicknesses of fabric results
when pressure is correctly regulated.
Surface finish, as well as the weight and texture of the fabric,
must be considered in determining the amount of pressure needed.
Adjustment of the thumb screw regulates the amount of pressure
exerted on the material while it is being stitched.
To increase pressure, turn thumb
screw clockwise.
Too light a pressure will result in irregular feeding which affects
both quality of stitch and evenness of seams.
Too heavy a pressure not only affects stitch and seam quality but
will mar smooth surfaces and pile fabrics.
14
NEEDLE THREAD TENSION,
STRAIGHT STITCHING
_11__ - ~_.t_
Needle thread tension too Needle thread tension too
tight--correct by setting dial to loose---correct by setting dial to
lower number, higher number.
A perfectly locked straight stitch results with upper and lower tensions balanced
so that needle and bobbin threads are drawn equally into fabric.
15
_ _:_ BOBBIN THREAD TENSION __ _._L
Bobbin thread tension too tight--
correct by turning screw counterclock-
wise.
STRAIGHT STITCHING
Bobbin thread tension too loose--
correct by turning screw clockwise.
A perfectly locked straight stitch results with upper and lower tensions balanced
so that needle and bobbin threads are drawn equally into fabric.
16
SATIN
STITCH
AREA
STITCH
8
LENGTH ADJUSTMENT
Satin stitching, a series of closely spaced zig-zag stitches
that form a smooth satin-like surface, is useful for both utility
and decorative stitching.
FOR ZIG-ZAG SATIN STITCHING
337
STITCH LENGTH LEVER
IN SATIN STITCH AREA
To Adjust Stitch Length for Satin Stitching.
• Move stitch length lever above 20 to satin stitch area.
• Run machine at slow speed.
• Tighten indicator by turning thumb screw to the right,
until stitches form a smooth surface.
Make a test sample first before proceeding with the actual
work. The Special Purpose presser foot, described on page 26,
is recommended for decorative satin stitching, and for making
buttonholes.
17
NEEDLE THREAD TENSION
ADJUSTMENT FOR ZIG-ZAG SATIN STITCHING
Zig-zag stitching requires less needle thread
tension than straight stitching; and closely
spaced zig-zag stitches that form a smooth
satin-like surface require less tension than
widely spaced, _pen zig-zag stitches. Further-
more, the wider the satin stitching, the lighter
the tension required.
To determine correct tension setting, a
test sample should be made on a scrap of the
fabric to be used. A properly balanced satin
stitch should lie fiat across the material.
Some soft fabrics may require the addition
of a backing to insure good stitching. Crisp
organdy and lawn are suitable for this
purpose.
The Special Purpose presser foot, described
on page 26, is recommended for decorative
satin stitch work and for making buttonholes.
Correct
incorrect
18
ZIG-ZAG APPLICATIONS
LINGERIE SEAMS
Dainty lingerie seams are made durable
with zig-zag stitching. After straight stitching
seam on wrong side, press both seam allow-
ances in same direction. From right side,
top-stitch with a fine zig-zag setting (1½
width), letting needle alternately enter seam
line and seam thicknesses, l his finish is
particularly suitable for bias seams.
KNIT FABRIC SEAMS
A narrow zig-zag stitch is ideal for seaming
knit fabrics. It is particularly suitable for
underarm seams, or other seams where
elasticity and give are needed.
For curved or bias seams, where a stay is
needed to prevent undue stretching, this same
stitch can be used to apply seam tape.
ZIG-ZAG APPLICATIONS
SEAM FINISHES
Seam edges support garment and should
be given a durable finish where fabrics have a
tendency to ravel.
The zig-zag stitch is ideal for seam finishing.
Place stitching near edge of seam allowance,
and then trim excess fabric.
DARTS IN INTERFACING
Interfacing can be shaped without bulk
19
with zig-zag stitching. Cut out dart allowance
on stitching line and bring raw edges together.
Pin over a muslin stay and stitch. Reinforce
both ends with reverse stitching.
ZIG-ZAG APPLICATIONS
MENDING
Zig-zag stitching is well suited for all types
of household mending. It provides a firm,
flexible bond for repair of tears and is ideal
for reinforcement and application of elastic.
Stitch length and width are regulated according
to need.
20
Tears. Trim ragged edges and reinforce
tear with underlay. Shorten stitch length at
ends and corners for added strength.
Application of Elastic. Elastic must be
stretched as it is applied to insure fullness
required in the garment.
21
ZIG-ZAG. APPLICATIONS
APPLIQUE
Motifs or designs, applied with a zig-zag
stitch, add beauty and interest to •wearing
appareland household textiles.
Bands, flowers, leaves or figures in con-
trasting or self fabric, may be effectively
applied to another surface by two methods.
The appropriate method is determined by the
fabric being used. A test sample is advisable.
Method _ 1
Position and baste design to fabric.
Outline entire design with a short straight
stitch. Trim raw edges close to stitching.
Set stitch width and stitch length for zig-zag
Method _ 2
Position and outline design as for Method
# 1. Follow the shape of the design, outlining
it entirely with zig-zag stitching. Trim away
excess fabric on the outer edges of the
applique after stitching has been completed.
stitch desired. Overedge design. This smooth
uniform finish requires no additional trim-
ming.
22
BUTTONHOLES
STITCH LENGTH: ABOVE 20 STITCH WIDTH: 2 AND 4
To establish exact stitch setting and buttonhole length a test sample is advisable. Be sure
to use the same fabric and number of fabric layers as in the garment.
C ......
2
Procedure: Mark button length on garment. Allow 1/8" at each end for bar tacks.
Side Stitching: Set stitch width at 2. Stitch down left side starting at point A and stopping at
end of marking, point B. Leave needle in fabric. Raise presser foot and pivot work on needle.
Lower foot and take one stitch at same width setting.
Leave needle in fabric at point C.
Bar Tack: With needle in fabric, raise presser foot and set stitch width at 4. Lower foot and
take approximately six stitches to complete tack. Leave needle in fabric at point D.
Side Stitching: With needle in fabric, raise presser foot and re-set stitch width at 2. Lower
presser foot and stitch to point E. Leave needle in fabric at point E.
E
23
BUTTONHOLES (Cont'd)
A
.T
O
Final Bar Tack: With needle in fabric, raise presser foot and set stitch width at 4.
presser foot and duplicate tack previously made. Leave needle in fabric at point F.
Fastening Stitch: With needle in fabric, raise presser foot and sgt stitch width at O,
foot, take approximately three stitches_
Remove work, draw threads to wrong side and trim.
Cut opening for button with a pair
of sharp embroidery scissors.
Lower
lower
24
DARNING
With just a little practice you will be able
to darn clothing and household linens effort-
lessly and quickly.
Set Stitch Width Selector on O setting and
I •
adjust Stitch Length Lever for desired
stitch length (usually about 10 or 12).
2. Decrease pressure by turning Pressure
Regulator thumb screw to right. Pressure
should be lighter than for normal sewing
but not too light to prevent work from
feeding smoothly.
5. Lower presser foot and start stitching,
alternately letting fabric feed normally
away from you and then gently pulling
fabric toward you. Continue this forward
and backward motion until area to be
darned is filled with parallel lines of
stitching.
6. For additional strength, turn fabric and
cover area with crosswise lines of stitching•
3. If area to be darned is open, baste an
underlay in place.
4. Place area to be darned under presser foot.
25
FASHION* AIDS AND ATTACHMENTS
Available forseparate purchase at your local SINGER CENTER
Designed to cut down your sewing time, enlarge the scope of your accomplishment and
produce "professional-looking" results, the following attachments are available for your
use on the 337 Machine.
THE AUTO-PILOT BUTTONHOLER...
automatically produces straight and eyelet-
end worked buttonholes, embroidered eyelets,
and perfectly aligned rectangles of straight
stitching for bound buttonholes. ButtOnholes
may be made in a variety of basic sizes, up
to 1½" in length, with the twelve templates
that are furnis.hed with the attachment.
Additional templates, in sets of four, are
available for separate purchase.
* A Trademark of THE SINGER COMPANY
THE RUFFLER... for gathered and
pleated ruffles. Ruffles may be made separa-
tely or made and applied in one operation.
THE STRAIGHT STITCH PRESSER
FOOT AND THROAT PLATE... for
delicate and spongy fabrics and for sewing
procedures that require close control.
THE SEAM GUIDE... aids in maintaining
uniform seam width; guides placement of
top stitching.
26
FASHION AIDS AND ATTACHMENTS
THE ZIPPER FOOT... indispensable for
the placement of stitching close to a raised
edge. For zipper insertions, corded seams and
slip cover welting.
THE BINDER FOOT... for the application
of commercial and hand-made bias binding.
THE HEMMER FOOT... forms and
stitches a perfect narrow 1/8" hem without
pressing or basting.
THE TUCKER... a time saver for making
tucks 1/8" to 1 inch in width.. Gauges tuck
width and tuck spacing; marks and stitches
in one operation.
(Cont'd)
THE BUTTON SEWING FOOT..• holds
two- and four-hole buttons securely for
stitching and provides for formation of thread
shank.
THE GATHERING FOOT.
evenly spaced shirring with
fullness.
THE EDGE STITCHER...
•. ensures
"locked-in"
regulates the
placement of straight stitching in relation to a
fabric edge by means of a series of slotted
guides.
THE SPECIAL PURPOSE FOOT...
designed to facilitate the placement of satin
stitching. It provides maximum visibility and
allows closely spaced zig-zag stitches to feed
THE THROAT PLATE LIFTING PLATE
... fits under the regular throat plate.
Necessary for free motion darning and
embroidery work, and for button sewing.
freely.
Eyelet accommodates a filler cord.
For buttonholes, applique, and mono-
grams.
27
HOW TO TAKE CARE OF THE MACHINE
To Clean the Machine
CLEAN
AND
OIL
BETWEEN
TENSION
CLEAN
CLEAN
DISCS
When in regular use
Machine should be cleaned periodically
with lint brush to remove lint and fluff which
may have accumulated around workirig parts.
To clean bobbin case area, removebobbin
case as instructed on page 29. Oil machine
after each cleaning as instructed on pages 30,
31 and 32.
When stored
If machine is to be stored away for an
indefinite period, a thorough brush-cleaning
to remove all traces of lint and fluff, followed
by swabbing of all exposed parts with a lint
-_._ free brush saturated with SINGER* oil is
....."_'_,..""'CLEAN necessary to protect machine against rust
AND damage.
OIL
-_"_:_ * A Trademark of THE SINGER COMPANY
To remove the throat plate To replace the throat plate
CLAMPING PIN
28
To Remove and Replace Throat Plate
/
/
• Raise needle bar and presser foot.
$ Open slide plate.
• Place thumb under right front end of
throat plate and raise until clamping pin
lifts up.
• Draw plate toward right to disengage.
/ , H
• Position fork of plate under clamping
pin as shown above.
• Push to left and press down until plate
snaps into position.
• Close slide plate.
To Remove and Replace Bobbin Case
• Open slide plate and remove throat plate
(see page 28).
• Unlock bobbin case by lifting and pulling
holder to right as shown.
29
POSITIONING
STUD
Remove bobbin case from machine.
Remove all lint, fluff or other foreign
matter which might clog machine.
• Replace bobbin case so that groove under
tension spring fits on hook raceway and
fork of case straddles positioning stud.
• Push bobbin case holder to left until it
snaps down into lock position.
• Replace throat plate and close slide plate_
30
To Off the Machine
To keep_your machine in top running condition, use SINGER Oil and SINGER*
Lubricant. Both are quality products especially prepared for sewing machines, and should
always be used in the care of your 337 machine. ' i1
....:7:'::..............._..........................
o
!
• Clean machine periodically as in-
structed on page 27.
• Apply a drop of oil to each place
indicated.
• Remove screws A and lift off arm
top cover.
• Apply a small amount of lubricant
to gears as shown, A tube of this
lubricant can be purchased at your
SINGER CENTER.
NEVER APPLY 01£, TO GEARS
Disconnect Machine from electricity supply before
Top Cover or Bed Cover Plate.
* A Trademark of THE SINGER COMPANY
===========================
removing Arm ....._:_:._..,<::.:..
31
/
• Remove face plate (see page 27) and oil the
places indicated.
• Open slide plate and apply a drop of oil to
hook raceway as indicated.
• Close side plate, replace arm top cover and
face plate.
32
To Oil the Machine (Cont'd)
G
Tilt machine back and remove thumb nut from screw G, being careful not to lose felt
washer, and remove cover from underside of machine.
Oil each of the places indicated by arrows. Avoid getting oil on any part of the motor.
Replace bottom cover.
THE MOTOR REQUIRES NO LUBRICATION
ARM
END
COVER
33
ELECTRICAL INFORMATION
The SINGER* Electric Motor in your
machine is furnished for operation on an
alternating current of 110-120 volts, 25 to 75
cycles, or on 110-120 volts direct current.
Special motors are available for direct or
alternating current for any voltage between
50 and 145, and for 32 volts direct current.
Before inserting Electric Plug, be sure that
voltage and cycles on arm end cover are
within range marked on electrical meter
installed by your power company.
Electrical Connections. Insert the three-
hole plug into the three-pin receptacle at the
right end of the machine. Connect the
two-pin plug into your electrical outlet and
the machine is ready to sew.
PEDAL
Speed Controller. Speed of machine is
regulated by amount of pressure on pedal
of foot controller or knee lever.
CAUTION: Do not attempt to remave the
arm end cover.
* A Trademark of THE SINGER COMPANY
Electrical Information (Cont'd)
FINGER GRIP
34
Sewing Light
To Remove Bulb. Press bulb intosocket and
turn it in " unlock" direction, as shown, and
withdraw.
To Replace Bulb. Press bulb into socket with
bulb pin in slot and turn it in " lock"
direction, as shown.
LOCKS
The built-in sewing light is located
beneath the machine arm. It is
turned on or off by the light switch
located under the stitch length
lever.
To Change Bulb
• Switch light off.
• Pull light down by finger grip
and hold in down position.
• Release hold and light will return
to normal position.
UNLOCKS
To all whom it may concern:
The improper placing or renewal of the trademark "S ! N G E R". or
any other of the trademarks of The Singer Company (all of which are duly
Registered Trademarks) on any machine that has been repaired, rebuilt,
reconditioned, or altered in any way whatsoever outside a SINGER factory
or an authorized SINGER agency is forbidden.
SINGER
GUARANTEE
WE GUARANTEE that each SINGER* sewing machine has been carefully manu-
factured and is in perfect operating condition on delivery. When subject to normal
family use and care, any parts requiring replacement at any time due to defects in
material or workmanship will be replaced without charge.
THIS GUARANTEE does not apply to parts requiring replacement due to natural
wear or to abuse or negligence of the user or in the event the machine is serviced by
other than a SINGER representative or Approved Dealer or with parts other than those
supplied by The Singer Company.
IN ADDITION to the above guarantee of parts, each machine will be inspected and
adjusted whenever necessary without charge for labor for a period of one year from
date of purchase.
THIS GI_ARANTEE is effective only with respect to the person making the purchase
from The Singer Company or one of its Approved Dealers. The original Sales Agreement,
or Cash Receipt, must be presented to obtain the benefits of the guarantee.
AGREEMENTS inconsistent with the foregoing shall be void and of no effect.
THE SINGER COMPANY
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