Pfaff 433 Instruction Manual

PFAFF

433

G. M.

High

Speed

INSTRUCTION

PFAFF

AG, Sewing Machine

Sewer

BOOK

Factory,

KAISERSLAUTERN

Insfruction

Book

PFAFF

Single-Needle Flaf-Bed Loclcstifch

with

Automatic

433

Lubrication

Sewer

PFAFF

Brief

Description

The

PFAFF

433

organized with

many important mechanical improvements while retaining oil worthwhile

features of the service-proven

be sewn, this which

has made the incorporation of a forced feed

separate

Since

all manipulations for threading the

length,

expensive retraining of operators is required.

With

its

machine

hook oiling system an absolute necessity.

backtacking and the

modern

performance, the

industry.

Machine

is o

single

needle,

link

take-up and horizontal rotary hook,

PFAFF

is capable of operating at speeds up to

and

functional

PFAFF

433

satisfies the greatest demandsinthe

433

lockstitch,

high

134.

Depending on the material to

machine,

are the same as

design,

rugged

speed

sewing

which

lubrication

regulating the

with

construction

machine,

incorporates

5,000

s.p.m.

system and

stitch

models,

and perfect

sewing

Varieiies

The

PFAFF

Model

The

above varieties differinthe needle bar rise, presser bar lift,

stitch

the

433

is available in the following varieties:

ClassofWork

Sheer, ight-

weight

Medium-weight

fabrics

Medium-heavy

fabrics

length

and take-up

fabrics

PFAFF

Lengfhof

(Stitchesp.Inch)

motion

433

Maximum

5V.

Sfitch

Maximum

Speed

(s.p.m.)

5,000

4,700

4,400

Needle

System

and are particularly well adapted to the

class of work they are intended to perform.

Setting

most

instances

the

PFAFF and power table are packed separately. clutch

motor.

ments.)

Power

a V-belt, wide

(Typeofcurrent

is transmitted

from

(DIN

2215).

the

433

is fitted for

The

and

tension

the motor to the

Machine

individual

machineisdriven

optional

sewing

to suit

machine

133

134R

134

power

Presser

Clearance

drive.

by a '/i

local

by means of

Foot

^/u"

maximum

Head

require

For

50-cycle

currenta2,800

r.p.m. motor is appropriate for

The

motor

pulley

speed

of the machine.

The below

numberofstitches which

diameters.

Balance

Wheel

dm ^

2^'/64" 2^-/64" 2^V64"

2^V^4"

dm=effective

3" 3" 3"

can be easily exchanged to alter the

table

should be consulted for all

DiameterofMotor

dm D Order No.

"/u" 4"/44" 4'V3:"

4^V.4"

4"/»"

diameter;

canbeobtained

50 Cycles

4'/.4'

4^8"

4"/84

4"/3= S'/b"

r.p.m.

60-cycle

Pulley

99089

99090 99091 99092 99093

99094

D =

total

motor

shouldbeused,

current.

with

Stitches

per

Minute

3,800

4,000

4,2C0

4,400

4,700

5,000

diameter

whilea3,400

maximum

data

regarding the maximum

motor

pulleysofdifferent

Cycles

DiameterofMotor

dm D OrderNo.

3^/s2" 31-/3/' 3"/84"

3"/84" 3'V.6"

4"/m"

3-/32 3"/84 3^V84

3 4'/64' 4^/8-

-/,8

' ' ' '

Pulley

99086 99087

99088 99089

99090

99091

sewing

Stitches

per

Minute

3,800 4,000 4,300

4,600

4,800

5,000

Unpack

After

the head

taking

cautiouslyinorder to

off

the

lidofthe

box,

avoid

unscrew

damage to the

the

wood

screws

machine.

which

hold

the cushioned wooden blocks that support the machine head in the box.

Cautiously

pads on the

on the

the

The

run

The amount of oil

machine in o can. The oil used in the

viscosityof110S/70»F

factory for the

reservoir take out screw d (Photo

wait

the

lift out the head,

machine

motor

pulley.

machine

whileinthis

table.Tofacilitate the

pulley,

Adjusting

is dispatched

condition.

2. Filling

which

lubricationofhigh

wipe

off the dust and

mounting

slightly

(US)or95R/70°F

tilt back the

the

V-belt

without

the

oilInthe reservoirs and must not be

machine

tensionisinstructedinSection

Oil

Reservoirs

is needed for the first two

PFAFF

(Br.)

speed

1),

which

sewing

fill

in about one pint

mount

of the

it on the rubber

V-belt,

and

pull

fillings

comes with the

slip

the belt onto

433 is a spindle oil with o

has

proved

machines.Tofill

(.5I)of oil obd

a few minutes until it has drained down into the reservoir. Then

oil

level

gauge to see if the

amountofoil

filled

up is

sufficient.

the belt

very

the

20.

satis

main

-check

The

level should be between the "max." and "min." marks when the machine

is inoperative.

Never

remove

the top cover to

fillupoil

there.

oil

Experience

has

shown

fhof

It is of advantage to

lubricate

the

hook

sepero-

tely. The reservoir which supplies oil to the rotary hook is located under

top

cover b on the machine arm. (Photo 1).

Photo

Take

out

(Photo 21).

screwcend

fill

about

5 cu. In.ofoil Into

the

hook

oil

reservoir

As long as the red tipofthe float spindle is visible In oil level tube S

(Photo

21)

while

the

machineisIn

operation, there Is enough oil in the

reservoir. If, however, the red tip Is flush with the top surface of the oil

sealer nut, oil should be filled up.

mm—V

Photo

It is

recommended

Testing

test-run

the

machine

Machine

with

needle

thread

and

bobbin

case removed. Before you plug the power lead into the electric circuit,

niake sure that the voltage of the circuit is the same as that indicated on

the

rating

pulley

will

turn

directionasthis is

The direction of

the belt. If the

toward

rotationofthe

belt

the motor and tip on the treodle.

can

tell In which direction it will

simply

exchange the two wires on the motor terminals.

Start the machine by pressing down the treadle.

plate of your

Never run Ihe

presser

For

the regulation of the

machine

foot

or raised the presser

sewing

you.

boundtocause

has

Never

been

mounted,

unless

you have placed a piece of fabric

oil

flow

machine,

must

troubleinthe

motor

can

From

rotate.

bar.

to the

and ascertain that the the

pulley

turninthe opposite

lubrication

best

be checked

hold the

balance

wheel,

system.

before

machine

mounting

switch on

the jerk of the balance wheel you

If it

rotates

hook

see

in the

Section

wrong

23.

direction,

under

the

SYSTEM

Photo

Taking

Raise fhe take-up lever to its highest position, lift the latch of the bobbin

Out

fhe

Bobbin

Case

case with thumb and forefinger of your left hand and pull the bobbin case

out of the machine as shown in photo 3.

As long as you hold the latch open, the bobbin cannot fall out.

Winding

For this operation the power-driven bobbin winder is used which features

numberofimprovements. (Photo 4).

The

bobbin winder

lubrication of the winder completely superfluous.

spindle

runs in a sintered steel

fhe

Bobbin

bushing

which

makes

Photo

order

of the bobbin winder pulley

to reduce

somewhot

the high

has

speed

been Increased to

of the machine, the

diameter

The V-groove in the rim of the pulley has been designed with an obtuse-

angled profile so that the V-belt

even

o round

belt

may

be used.

will

fit into it perfectly and, if necessary,

The bobbin winder is quietly stopped by means of an adjustable leather

pad.

A windshield which is mounted on the winder

being dragged over

toward

the belt by air suction.

base

prevents the

thread

from

Fasten the bobbin winder to the table with Its driving pulley far enough

from

the

disengaged.

machine

beltsothat

it will

not

touch

the

belt

when

the

winder

Pass the thread from spool 1 through thread guide 2, clockwise around and

between tension discs 3, and to the bobbin.

Pull

the thread through the

slot in the bobbin, from the inside. Place the bobbin on spindle 5 and hold

the

endofthe

the winder by pressing down engaging lever 6.

thread

until

the

winder

has

madeafew

When

revoilutions.

sufficient thread has

Start

been wound on the bobbin, the winder will stop automatically. The amount

thread

to be

wound

Insert a full bobbin into the bobbin

top from

1he

left toward the

on the

bobbinisregulatedbyscrew

Turn it to the right

endtothe

Threading

left

right,

for

thread;

for

less

thread.

ihe

Bobbin

casesothat

Case

the

as shown in photo 5.

thread

draws

on the

Photo

Pull

the thread into slot 1 end draw it under the

eye2.Place

the

bobbin

case

with

the

bobbin

tension

the

spring into delivery

center

studinthe

bobbin case base and moke sure that the end of the latch points toward

you. Press the bobbin case all the wayinuntilitclicks

This

is very important as, otherwise, needle or bobbin case breakage may

result.

thread the

clear

view

of the operator,

PFAFF

Threading

433

is not

similar

difficult

to the

the

Needle

at all

PFAFF

info

position audibly.

since

the thread passes in

133

and

134.

(Photo

6).

Photo

Pass

the

thread

from the

thread

unwinder to

thread

guide pin 1

and

through

both holes in order to keep the thread from whippingathigh speed.Bythe

same token, pass it through all three holes in thread retainer 2 as shown in photo 6, then between tension discs 3, through thread check spring 4, under thread regulator 5, through guide 6, up and from right to left through eyelet 7 in the take-up lever, down and through thread guides 8 and 9, and

from left to right through need'le eye 10.

Drawing

fhe

Bobbin

Thread

Hold the

endofthe

needle

thread

and

turn the

balance

wheel

toward

you

until the needle moves down and up again, thus catching the bobbin thread

which

will

threads

come up through the needle holeina loop. (Photo 7). Lay both

back under the

presser

foot.

Moke sure that fhe take-up lever is in Its highest position olwoys when

beginningorendingaseam.

Failure to observe this precaution may cause thread

of the needle. In this

beginning to

sew.

case,

it is

not

necessary

jamming

to hold the

or unthreading

threads

when

Photo

9. Regulating the Thread Tensions

obtain o perfect seam, observe the

The

needle

and

shown

bobbin

in Fig. 8.

Turn tension nut M (Photo6}clockwise for a

counter-clockwise

threads

foralooser

shouldbelockedinthe

tension.

following

hints:

tijhter

centerofthe

material

upper tension, and

The lower tension is

the

small

tension,orcounter-clockwise

The tension should be

screw

and should be such that the stitches

seam pucker,

goods.

The grade of thread used plays an important

seamonany

Sheer fabrics require a thin

unsuitable for

regulating the thread tensions you have to have a little experience before

you can lell

tension

material.

which

maybetoo

regulated

driver

and

turn

foraweaker

regulatedinaccordance

and

that

they will lie in a straight ine on the surface of the

and

almost

any

tension

fabric

neecis

tight or the lower tension

by means of tens

this

screw

will

be tightly set, yet without causing

soft

thread. Stiff and resistant

becauseoftheir low resilience.

adjustment.

eithe

tensia

screw

' clockwise for a

with the

part

in obtaining a perfect

Fig. 10

too

loose.

material

either

z (Fig. 9).

to be

threads

the

Take

tighter

sewn

are

upper

Fig.11Ihe

tension

too

tension

tight.

Fig. 10

Fig. 11

on the needle thread may be too weak or the lower

The operator

will

have to decide in every individual case if either the upper

or lower tension requires adjustment, porticularly when the thread fornts

small knots or kinks on top

The upper tension can be adjusted only when the presser

because

it will

automatically

10. Regulating

it greatly depends on the amount of pressure

presser foot whether the work

will

be staggering stitches in the seam and feed markings on ihe underside

the

fabric.

Turning

pressure for heavier materials;

for lightweight fabrics.

When stitching delicate and piece of tissue paper under the material

and prevent puckering and can be readily pulled

The PFAFF 433

fabrics use short System 133 R needles while Model B and C machines

require

diameter

pressure regulating screw V

11.

uses

shank

diameter

System

of is imprinted on the needle

standard

134

R needles

and

release

the

flimsy

Choosing

round-shank

ModelAmachines

bottom

of the fabric.

bar

the tension

Pressure

will

feed smoothly and evenly or if there

(Photo

turning

it outwardly

when

raised.

on the Material

which

is exerted by the

20)

inwardly

will

ease the pressure

fabrics, it is recommended to place a

which

will

protect its underside

away

after

the sewing.

the

which

Proper

are

needles

which

longer.

wrapper.

Needle

witharound

are

intended

The

standard

is lowered

increase tlie

point

atid

for

sheer

shank

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