SINGER 631 User Manual

Instructions for Using

SINGER“

Sewing Machine Model 631

\ \

'I'iio SINGFH Conveifibio
CHAIN ST1TC:H ieature

. . . n'jiK‘siTitK Ilio ultimali; in scwimj madii!i(> pmfurmanco. With thi*
purduiso OÍ Uk; nrw Si,AN'l'-0-.MA') 1C, you ( <in iako pride i n ovrninij
the llnc.st sev.'iiig inadhiU' cvm built. You'll imüvt'! <it its almost un­beliovablo case of opmation . . . the remai kabh' seivici's it imtfoims.

You'll deiUjht in Us ¡Kuti'ct, beautilul sütrliiiU!. In adililion to its
numerous outslandiiH! .u!v.itil<i(|es tlu’ maddne umv imoipoiatr's a
new and unique h'ature in that look stitihinq and diain sfituiiiuj can
hi' seleetivoly produeeil on tlu> s.ime maihiue.

® Only SINCFR proiiui es an .uitomafie m.uhini' that in ailtiilion (o

the fonventionat totk sUtdt also sews a single 1!iiea<i diain sliti:li
wiikli tan be nsoit ior basUiH) sinims thus replathig liaint-bastintj.
This feature will release, you fioni iiine-tonsuminij work and if
reve<ils new <t,s()ec:ls so far nnri-i;xistenl in tlie overall picture of
the applications of the modmii family sewinrj maihine, (iYu deiaited
insiructions conceininq operation and application, .see page 20.)

# SINGTR lias WOHl.D’S FIR.ST Am'OMA'nc with slant neciile ami

gear drive. Seeing is easim, sewing s!niM.)UH'St evi»r. No slipjring
i>r stallimj

O.'Jl tniiy KMmuknblf «UKÌiiiio with

Form 30-047G íRev. 176)

® SINGllR has WORI.D'S FIRST Al,iTOMAT!C

threading. Has built-in lliroading tliarl, haiuiy
f I o n t of neoiilc!

« SlNGIiR lias WORI.D'S ITRST At.iTOMA'nC wiih a buill-in eye-

level slitth diait, with push bulton seleelion lor wliatever lam y
stitch you want!

V\ Tradeitiark ol THE SINGER COMl>ANY
Copyright 1965 THE SINGER COMPANY
All Rights Reserved Throughout the World

wiih ilouble-easy

’drop-irr' bobbin in

Printed in U.S.A,

OTHHR OUTSTANDING FJiATURliS ARE:

• CYLINDER BED simplifies sewing of articles of
a curved or cylirrdrical nature
bed with the push of a button.

• PERFECT STITCHING ... straight and zigzag.
® NEEDLE CLAMP holds one or two regular

needles
two needle stitdiing.

• NEW TYPE SPOOL HOLDER ensures a smooth
flow of the needle thread.

® THROAT PLATE with .seam guide markings.

Meld with magnets for easy removal and replace

ment.

® SUPERFINE CONTROL of stitch length ensures

perfect satin stitching.

• PRESSURE OF PHESSER FOOT can easily be
adjusted according to regulator.

TO GET THE MOST ENJOYMENT
FROM YOUR SINGER 631

Take advantage of the free sewing lessons to which you are entitled!
Skilled, SlNGER-trained teachers will give you personal guidance and
assist you in learning the iundamcntals ot home sewing.

.....

same or different .sizes for exciting

.......

converts to flat

HINGED FACE PLATE, houses threading drart
and swings open for easy access to oiling points.

BUILT-IN MOTOR with worm wheel drive, no
belts required, excellent penetrating power when
.sewing heaviest materials without.manual assis
tance.

BUILT-IN LIGHT focu.sed on sewing area, which

swings down for easy bulb replacement.

ALL MECHANISM completely enclosed.

SPECIAL PURPOSE FOOT.

FLEXIBLE SEAM GUIDE.

HINGED BED EXTENSION for increased work
area,

COMPARTMENT for attachments and accesso
ries built into dctadrable cloth plate.

SINGER SERVICE

Wherever y'ou go you will find expert, dependable SINGER' Service
close at hand, SINGER is interested in helping you keep your SINGER
Sewing Machine in top running condition. That is why you should
always call your SINGER SEWING CENTRE if your machine over
requires adjustment or repair. Only from your SINGER SEWING
CENTRE can you obtain the services of a trained SINGER repair man
and warranted SINGER* ports.

EVERYTHING FOR THE WOMAN WHO SEWS

The answer to your sewing needs is at your SINGER SEWING
CENTRE. There you will find a wide choice of sewing aids, notions,
serving instructions and services. Look for the famous red "S" and
SINGER trademarks on your SINCIER .SEWING CENTRE and the ever
ready SINGER Service car. See j)hone book for address nearest you.

TO RliMOVn AND KI-PI-ACK DliTACHAni.E CLOTH PLATE

To dctadi cloth plate from machine, press button on machine bed and withdraw plate.
Replace cloth plate in same manner, locating two pins in plate with corre.si)ondincj holes in rnatiiinc

bed. Push cloth plate to tight until it snaps in locked position.

See pages 88 to 93 for applications of c>dinder bod feature.

NEEDLE AND THREAD SELECTION

The selection of thread should be based on the fabric to be stitched. The thread should blend with

the fabric in colour, fibre and size.

Silk and wool fabrics should be stitched with silk thread; cotton fabrics should be stitched with cotton
or cotton inorceriscd thread, etc. The thread must be of a size that will imbed itself into the texture of the
fabric. Thread that is too heavy for the fabric will remain on the surface and become weakened by fric
tion and abrasion.

The selection of the needle .should be basen on both the fabric and thread being used. The eye of the
needle must be large enough for the thread to pass freely through it. The blade of the needle must be fine
enough not to mar the fabric with too large a puncture, yet heavy enough to pierce the fabric v/ithout
binding or deflecting.

You will obtain best stitching results from your Sewing Machine if it is fitted with a SINGER* Needle.

NEEDOiS ANJ> THREAD

This madiine uses needles

Catalogue 2020 (15X1),

Sizes 9, 11, 14, 16 and 18,

For perfect stitdiiiig, select correct needle
and thread to correspond with fabric (see
page 6),

Be sure to use similar threads for both
needle and bobbin.

NEEDI,E INSERTION

Raise the needle bar to highest point by
turning the hand wheel toward you. Loosen
the needle clamp .screw. Insert needle up­v.'ard into clamp as far as it will go, with the
flat side of the needle to the back and the
long groove toward you. Tighten needle
clamp screw.

1, Slij) spool sea! on to s])!ndle (Cushion

side i<u;ing spool of thread).

SPOOL HOLDER

n

2. Slip s])ool of thread on lo spindle.

3. Press Ihtr'ad lead-off against spool of thread. Select threarl lead-off according to the si/.e of tliread

sjroo! used, as shown.

UPPfiR THRI-AOING-SINCU; NliKDIJi

Raise tako-up lever lo highest point. Phiee thread
on spool holder and load Ihrouyh threading points
shov.ii. Thread needle irorn front to back. Drav/
snffieient IliKidd through eye of needle v.’iUi which

to start sevring.

WIND THE BOBBIN

Release hand wheel, turn slop motion screw with right hand in direction shov/n by arrow. Slip bobbin

on to bobbin winder .spindle.

10

WIND THE BOBBIN (Conftl.)

'i hreiui the madiiiie as shown. ,
Wind several coils of thread around tlie bobbin and depress bobbin winder engaging lever.

WIND THE BOBBIN (Conf'd.}

Do not wind loo riuidi thread, otherwise there

would be no free run of the bobbin in the bobbin

case.

Stop rnacliine, raise bobbin winder engaging lever

and retnove bobbin from bobbin winder .spindle.

Tighten .stop motion .screw with right hand in

direction sliown by arrow.

11

12

REMOVE THE BOBBIN

Open slide plate and remove bobbin.

13

THREADING THE BOBBIN CASE

...

\

Hold bobbin so that thread biads off in direction shown. Place bobbin in case. Guide thread into slot
and under spriny. , .

Draw thread into notch at end of s))riny, pulling off about 3 inches of thread across the bobbin.
Closer sHd(; platci allowing thread to enter notch.

M

3 Piessci P'ool Screw

PKINCIPAL PARTS OP MACHINE 031

6 Pressui'« Reloiise

BuUoi)

y TJnoad T<ike-itp

I.over
8 Pre-te(!sion
9 Patteni Selector

Builoes

iO Stitch Width Lever
H Stitch Chart
12 Liyht Switch
13 Thread Guide
14 Spool Spiiuile
15 Thread Lead-off
10 Spool Stiat
17 Bobbin Winder

HngagiiKj Lever

18 Hiiud Wheel
19 Bobbin Winder

Spindle

20 Stilch Length

Regulator

21 Bobbin Winder

Pre-tension

22 Bulb Replaccnrent

Lever

23 Cloth Plate

Disenyagiiiii Ihrllon

15

STITCH U;NGTH INDICATOR

Numerals on the left sidci of the indicartor repre
sent the mimbcu' of stitches pcrr inch. Numerals on
the right side represent stitch length in millimelcr.s,

A supertinc control can be made in case ot stitch

huKjths less than 1 mm or stitches per inch {2,0).

The greatest stitch Icmglh ol 4 nun or 0 stitches per

inch can be locked in place when slitdiing folds,

phrats or muiUph; layers of heavy fabric.

To set stitch length; Loosen by liiming tluimb nvd
to the left as shown, Position lover for desired stilch

length. Tkjlden by lutning thumb mit to the liglit.

By raising the stitch length regulator to the hig

hest point, reverse sUtdung is accomplished at the
same stitch length as forward. When in locked posi
tion, 4 inrn or stilches ¡rer inch (G) cannot be rever
sed. If reviuso stitching is ch'sired with thi.s stilch
length position, turn thumb mil to the left unlil the
stitch length regulator can bo adjusted to its highest
point al revcr.so stitching.

16

::-W )

■ IH

LJNLOCK.S

KLVliRSH

It

LOCKS

Srn'C:H WIDTH AND NliEDI.H POSITION SEU-Cn'OR

1 2 3 4 S

I I I I,!.I I I I

A Stitdi widlh or needle position settiny is necessary for both straight and zig/.ag stitching.

When used with a straight stitdi setting, the lever ¡ilaces stitching in left, centre or right needle position
{see pages 26 and 27).

When used with a decorative stitdi settinci, the lever controls width of primaiy patterns and produces
variations of combination ¡patterns (see pages 41 and 43).

To position, depress lever and slide it left or right to desired setting. Numerals indicate five positions

but intermediate settings may also be used.

PATTERN Slil.liCTOR

Please note.': Do not make selector adjustments while the needle is in the fabric.

When make Patletn selection set stitch width lever at 3,

3

To Select Rettuired Pattern

1. Depress Push Button A and keep
depressed until selection is com

pleted.

2. ihish Pattern Selector Buttons.
,3, Select lequired Pattern.

4. Release Pattern Selector Buttons.

5. Release Push Button A.

PATT'ERN .SEUiC'I'OR

I, N P R

K|M|0|q| Special

M I I I I I I I

A 1 C I E j G I f

B D F H J

VI

Settings from K through Special are

made by the upper button.

Settings from A through J are made by

the knver buttou.

13

THROAT RI.ATH

RliMOVAI. AND RliPLACRMENr

Removal of throat plate

Raise pressor bar. Turn hand wheel to raise needle

to its highest jjosition. (i)pen slide plate. Place thumb pins and then close slicic jriate.
under front end of throat plate and lilt plate from
machine.

Replacement of tiiroat plate

Place throat plate in position over two clampincj

19

20

CHAIN STITCH

More than any other sewing machine the new SiNGKR 631 will
eliminate a considerable amount of limc-consumincj and burden
some work previously done by hand, 'i'his machine has the uni­cpic feature of being capable of producing not only CMrnventional
lock stildiing but selectively single thread chain stitdung.

The main advantage of this lype of stildi is tliat the single thread
chain stildi can easily and cpiickly be removed by a single pull
on the chain stitch seam. By means of the chain stitch the, neces

sary tacking and basting operations indispensable for sewing

perfectly fitted dresses or other garments can now be produced
on a maduiie. liven a section of a chain stitch scam can be remov
ed without any effort as is frecpiently recpiired wlion fitting the
dross or garment (side and waist seam.s). Once the dress or gar
ment fits, the tinal lock stildi is stilchcd in a close parallel line
to the diain stitch. Tlien the temporary scam is removed by a

single pull without leaving remains of the thread in tlio fabric.

Thus sewing-in of the basting .seam is very unlikeiy. For basting,
regular thread or darning thread may be used.

The single thread drain stitch has a wide range of applications

and can be erniiloyed (or a variety of operations, for instance:

Hdge basting on jackets, coats and costumes
serting — attadring collars

Basting canvasses to the fronts of costumes and jackets in
stead of sewing them with zigzag stitdres;

Sewing shrinking tucks on garments as shirts, pyjamas etc.

as well as on ready made clothes and curtains made from

fabrics which arc likely to shrink. The temporary stitdiing of
the curtains and also the final stitching can be performed on
the same madiine. Stitdiing growth tucks whidi can be open
ed on clothes for growing driklren, as desired;

Re-sev,'ing waist and leg horns on ladies' and men's under
wear of tricot or interlock fabrics wdien replacing elastics;

• Adjusting length and width of ladie.s' slips (shortening for
short persons, taking-in widtli (or slim persons) particularly
to matdi fashions when dresses have a certain degree of
transparency making a slip essential.

Another most distinctive feature of the diain stitch \cdiidi will
certainly be appreciated by the homeworker for artisan type
production is that the chain stitch is formed exclusively by the
needle thread thus freeing the operator from bobbin winding.

This, in turn, is a time saving factor. In addition to the above
mentioned applications tlie artisan worker wilt use the drain
stitdiing tor - -

l•irst contour stitdiing on shirt collars - - sewing on labels -

lieinming operations on neckties and umbrellas
all operations where the chain stitch proves to be advanta
geous with respect to convenience, C}uality and time.

...........

in .short,

.........

hems on skirts, blouses etc.;

............

- sleeve in

TO PUKPARE THE MACinNE EOll CHAIN STITCH SEWING

Set .Selectors at AK and stitdi width iever at .3

Idr.st remove regular throat plate and bobbin.
lii.sert chain stitdi looj) retainer into bobbin case

(lHustr<iticm 1)

Tilt latch {Illustration 2) and turn to the left against

stop (Illustration 3).
Insert chain stitdi throat plate.

22

t!u> lu-udic thread in tlie ciiaiu stiUli Diroad yrude

lu lUldUioti io noniuil iliicudiiHj, pSuce

with llui iace ])!ale oiu-ti.
Stiktv leiiyllt; Nounallv' set for maximum lenrjth,

approx. 0 stildiirs to tiu; indi |4 mm) (ieit. tow of
mmitiers on llie sUitri indieatm jrl.ite), Лиу stiUh
ii'iMitti i)('twe(4i h and \'J. .sfitsiu's to Ih«' iu(i! {?. mm)
may ire used.

Upper fhnuHi ieiisiou: Noimiilly set between 2 and
.'i. Siiijlit adjustment ntay be lecjuittrd depemtrmt on
Itur sUtih ieufjtli and ilie iiiateiiai used.

CHAIN STirCHING
A dt<iin stiidi strain lias the, same appearauetr as a

lod; stildi .straru <)u the toj) side of the fabric,
f towevi'v, the knottimj of the slitdi doe.s not occur
in Uitr matetial as trii a propiuly ItalaiKrt'd ккк stitch
seam; instead thi> thread forms loops on tlu' imder­sido of the fabiie widdi iesembh:> small arrowlteads,
Tiie.se anov.’htmds peculiar to the thaiu stitt.h poiu!
tov.xmis Uie betpunintj of the seam.
When stattintj make sute that the taktr-up lever is
in its highest ptrsiiion, ritis will prevent the needte
thread from pultintj triif of the needle И the thread
has been eut too short. Sew forward only! If the
matt'iiri! is pivoted at the needle for ojmrations
where corneitng is retpdred, m<ike certain Umt the
needle is on its upv.-artt movement (apptox, 1 cm

above its lowest iroint) to avoid skijrped .stiichos.

then cottlinne to sew,

TO KHMOVJ- 'ГПК млтешль TIIOM M'NIÎATH

тип l'IHrSSliR TOOT

'Hie easiest way of retnovinrj tlio materia! is to sew
off lilt! edge of the fabric wtiito slightly ptdiiny on
the mattnial, lliis produces a diaiir whidi sliould
ire rtU sonu' distance away ftotn the fabiic, How­ev(u, if tinr scant is ended Ixrfore llu' ectge of lire
fairric, Irriug tile takc-up lever fir its liighesf posi
tion, Hum lit! (he ¡rn'ssiu loot am! pull somr; thread
thmW)li the take-UJ) lever from tllC spool pin. Nov,'
drciW the loose thread Iretv lam the pressm foot and
liie m.dtuial to tlie riglit vith the scissors <ind ttien
cni lh<> thieati. By removing the niutiuTii liie free
end of thc‘ thiead is automatically pulh'd to the
underside of the niaterial and Ifie s<Min is securely
Iruked,

2,2

TO OPEN THI; SHAM

'i'he, diain stitdi seam can be opened in one direc
tion only, from tfio end of the seam toward.s the
start of the seam, The opening direction is distin
guished by Ihti arrov.dieads on the underside of the
fabiic which ¡roint towards fire ireginning of the

To open the seam, cut the last stitch on the top side
of the faluic and thmi pull up (he ]>ieeeding stüfi».
With ttiis free thiead end the .seam can bo removed
by a single pnil. In the same manner the scam may
bo opened and removed at any dosiroii place by
pulling the thread emt in arrowhead direction. The
remaining section to the end of the scam will be
inaiiitained.

24

Section to ionu'tin

Section to be; opened

Section to lernain

Mowever, if the section towards tlie

beginning oi the seam is to remain and
the segment towards the end of the
seam is to be rcmoveci, cither partly
or completely, the remaining section
mnst bo locked first, inrr this purpose,
cut the scam at the desired place on
the top side and pull the loop out'of

the fabric on the uiuierddc of same.
Ttieii the desired segnrinii of the scam
can be. removed as staled above.

TO CIlANGl: PROM CHAIN STITCHING TO LOCK STirCHING

Clranging to lork stildiiirg requires only unthreading of the drain stildi llu<;ad guide (see page 2,1), repla
cing tire bobbin and inserting the desired zigzag or straight .stitch tliroat plate,

2.5

bOCK stitch

STRAIGiir SmCHING

A K 1

A

Sel Sodector at AK.
.Stitdi widlh lever al 1 To lotsile slitdiing in central position.
General purpo.se throat plate and presser foot.

lise general puiiiose throat phiie and presser foot for ali ulilify sewing, long stiaight seams, etc,, ami

wliere there is occasion to alimiiate Ixdwm'n straight and /igzag slitdiing.

25

..

STUAICniT STITCH THROAT I’l ATii AND

PRTSSliR TOOT

Use the stiaic|hi stildi tliroal plate and ¡)rcsscr
foot where fabric anct sewing procedure require
close control. . . for precision stitching of curved
am! scalloped edges, top stitching, edge stitching,
etc.

J-'or best results, this equipment should he used
wlion stitching sheer and iiliiiy fabrics, knits and
tricots (particularly synthetics) and ail soil sirongy
materials.

STRAiGHT STTTCTHNG WITH U:TT AND RIGHT NliT.DU; ROSmON

^ i ' ! : r ; ? 1

A

1

: 1

1

^ 1 ;

: i ;

)

1

i >

i 'It

1 i 1

1 i (

* I

i j : 1

• 1

i i

i { > :■ i

Set Selector at AK.
Stitch width lever at 1, 2, 4 or S.
General purpose throat pJnte and pressor loot.

Do not make stitch width lever adjustmcnls while the needle is in the fabric.

To meet specdal recjuhemenls a line of stitching may be placed to the right or left of cenlrc.

Stitch width lever settings 1 and 2 locale siitching to the loft. Settings 4 and 5 place it to the right.
Inlcnmediote settings may also be. used,

27

PRTRARl: TO STW

V ft 1

f '/H ra

V/ \ ..

/

^ .. ]

Hold needle Ihroaci lightly with left hand. Turn hand wheel .so that needle entens plate and brings

up bobbin thread. . ,, ,, ,,

l\ ■ ' I

(U

/.

5^

/

Pull end of bobbin thread through plate and place both needle and bobbin threads diagonally under

presser foot.

28

SHWING A SHAM

U

Sot stitch rogulator for stitch Icnytli dcsirecl. Position noocilc into fabric alront V; inch from ocicje and

lower pressor foot. Raise; stitch rccjulator to reverse.

Back stitch to c;(5c(<; of fabric for reinfmeernent, l.ov.’er reyuiator for forward slitchiny of sc;am. Raise

stitch rc(|ulalor,

4

-i

29

Back stitch to reinforce end of seam, and lower reyuiator to forward .stitching position.
With take-up lever at higJiest point, raise presser foot and remove fabric.
30

CUiniNC AND SUPPORTING PABRIC

Most iabrics iioed only to 1)(; (juiiiod in froiit of 11k; piessei loot.
i'abiirs of umisual tt'xtuie and woavo, filmy sIkkos, CK'pos, kniis, tikots, otr., !iK|uiie supj)oit whilo

being sUldieii.

For Mich fabrics, use 11k! straight .stitch throat plate' and ¡HCSSf't foot, and ajtply gontlc tensiou to trie

seam by hoiriing tfie fabric in fioni and in b.ick of the prossei foot as iliustrated.

\

Pin-SSUiO; AOJUSTMP.N'I'S

Increase

Pressure, is tlie force tlie picsser foot exerts on fabiic
while it is Ixnng stitdred.

The presser foot inrist bo lowered prior to adjustments.
Sniootli, even haridiing of .several thicknesses of (abtic
result.s when pr<;ss«r<; is correctly regulated. Heavy pres
sure is for thick fabiic and tigiit ¡rrcssure is for thin fabric,

'I'oo light a pressure will result in itregtilar feeding which
affects both (|nality of slildi and evenness of scams.

Too heavy a pressure not crnly affects stitch and sciarn
(¡uality tnil will also rnar smooth surfaces and pile fabrics.

Surface finish, as well as the wrnghl and texture of the
fabric-, must be eousidcred iir determining the anrottnt of
prcKisurc; ncieded.

32

Decrease Position for darniric)

and cmlH'oidcny
operation.s