UnionSpecial 39500GB Hoja de instrucciones

Fl

NEST

0

UAUTY

STYLES

39500GB

39500GC-

045

CATALOG

No.

103GB

®

INDUSTRIAL

SEWING

L

EWIS

•

CO

L

UMB

I A

MACHINES

'--

\

--

0

\_

CLASS 3.9

500

~

HI-STYLED

HIGH

SPEED

TWO

NEEDLE

DIFFERENTIAL

FEED

TOE

CLOSING MACHINES

MACHINE

COMPANY

CHICAGO

From the library of: Superior Sewing Machine & Supply LLC

Catalog

No.

103

GB

(Supplement

to

Catalog

Noo

103

FA)

INSTRUCTIONS

FOR

ADJUSTING

AND

OPERATING

39500

GB

LIST

OF

PARTS

CLASS

39500

Styles

39500

GC-045

First

Edition

Copyright

1967

By

Union

Special

Machine

Coo

Rights

Reserved

in

All

Countries

MACHINE COMPANY

INDUSTRIAL

SEWING

MACHINES

CHICAGO

P r i n t e d

in

U.

S• A •

2

July,

1972

From the library of: Superior Sewing Machine & Supply LLC

IDENTIFICATION

OF

MAACHINES

Each

Union

Special

machine

is

identified

by

a

Style

number

on

a

name

plate

on

the

machine.

Style

numbers

are

classified

as

standard

and

special.

Standard

Style

numbers

have

one

or

more

letters

suffixed,

but

never

contain

the

letter

"Z".

Example:

"Style

39500

GB".

Special

Style

numbers

contain

the

letter

11

Z".

When

only

minor

changes

are

made

in

a

standard

machine,

a

11

Z"

is

suffixed

to

the

stan-

dard

Style

number.

Example:

"Style

39500

GBZ".

Styles

of

machines

similar

in

construction

are

grouped

under

a

Class

number

which

differs

from

the

Style

number

in

that

it

contains

no

letters.

Example:

"Class

39500".

APPLICATION

OF

CATALOG

This

catalog

is

a

supplement

to

Catalog

No.

103

FA

and

should

be

used

in

con-

junction

therewith.

Only

those

parts

used

on

Styles

39500

GB

and

GC-045,

but

not

on

Style

39500

FA

are

illustrated

and

listed

at

the

back

of

this

catalog.

On

the

page

opposite

the

illustration

will

be

found

a

listing

of

the

parts

with

their

part

numbers,

description

and

the

number

of

pieces

required.

Numbers

in

the

first

column

are

reference

numbers

only,

and

merely

indicate

the

position

of

that

part

in

the

ill

us-

tration.

Reference

numbers

should

never

be

used

in

ordering

parts.

Always

use

the

part

number

listed

in

the

second

column.

This

catalog

applies

specifically

to

the

standard

Styles

of

machines

as

listed

herein.

It

can

also

be

applied

with

discretion

to

some

Special

Styles

of

machines

in

Class

39500.

References

to

directions,

such

as

right,

left,

front,

back,

etc.,

are

given

from

the

operator's

position

while

seated

at

the

machine.

Operating

direction

of

handwheel

is

away

from

operator.

STYLES

OF

MACHINES

Hi-Styled

High

Speed.

Two

Curved

Blade

Needles,

One

Looper,

One

Spreader,

Three

Thread

Overseam.ing

Machines.

Differential

Feed,

Trimming

Mechanism

with

Spring

Pres

sed

Lower

Knife,

Automatic

Lubricating

System.

39500

GB

Light

to

medium

duty

machine

for

closing

the toe

sections

of

women's

seamless

nylon

hosiery.

Seam

specification

5

21-SSa

-1.

Standard

seam

widths

approximately

1/8

and

5/32

inch

from

left

needle.

Stitch

range

20-100

per

inch.

Cam

adjusted

main

and

differential

feeds.

Maximum

recommended

speed

7000

R.

P.M.

39500

GC-045

Light

to

medium

duty

machine

for

closing

the

toe

sections

of

men's

hosiery

and

socks.

Seam

specification

521-SSa

-1.

Standard

seam

width

approx-

imately

3/16

inch

from

left

needle.

Stitch

range

20-100

per

inch.

Cam

adjusted

main

and

differential

feeds.

Maximum

recommended

speed

7000

R.

P.

M.

OILING

CAUTION!

Oil

was

draiued

from

machine

when

shipped,

so

reservoir

must

be

filled

before

beginning

to

operate.

Oil

capacity

of

Class

39500

is

sia

ounces.

A

straight

mineral

oil

of

a

Saybolt

viscosity

of

90

to

125

seconds

at

100

Fahrenheit

should

be

used.

Machine

is

filled

with

oil

at

spring

cap

in

top

cover.

Oil

level

is

checked

at

sight

gauge

on

front

of

machine.

Red

tip

of

oil

level

indicator

should

show

between

gauge

lines

when

machine

is

stationary.

Machine

is

automatically

lubricated.

No

oiling

is

necessary,

other

than

keeping

main

reservoir

filled.

Check

oil

daily

before

the

morning

start;

add

oil

as

required.

3

From the library of: Superior Sewing Machine & Supply LLC

OILING

(Continued)

The

oil

drain

plug

screw

is

located

at

back

of

machine

near

bottom

edge

of

base.

It

is

a

magnetic

screw

designed

to

accumulate

possible

foreign

materials

which

may

have

entered

the

crank

case.

It

should

be

removed

and

cleaned

period-

ically.

NEEDLES

Each

Union

Special

needle

has

both

type

and

size

number.

The

type

number

de-

notes

the

kind

of

shank., point., length.,

groove,

finish

and

other

details.

The

size

number.,

stamped

on

the

needle

shank.,

denotes

largest

diameter

of

blade.,

measured

in

thousandths

of

an

inch.,

midway

between

shank

and

eye.

Collectively,

type

and

size

number

represent

the

complete

symbol

which

is

given

on

the

label

of

all

nee-

dles

packaged

and

sold

by

Union

Special.

Class

39500

machines

use

a

curved

blade

needle.

The

standard

recommended

needle

for

the

machines

covered

in

this

catalog

is

Type

154

GCS.

Below

is

the

des-

cription

and

sizes

available

of

the

recommended

needle.

154

GCS

Description

and

Sizes

Slabbed

shank.,

round

point,

•

046

inch

double

slab.,

curved

blade.,

standard

length.,

double

groove.,

struck

groove,

spotted.,

chromium

plated

and

is

available

in

sizes

022,

025,

027., 029.,

032.

To

have

needle

orders

promptly

and

accurately

filled,

an

empty

package,

a

sample

needle.,

or

the

type

and

size

number

should

be

forwarded.

Use

description

on

label.

A

complete

·order

would

read:

11

1000

Needles,

Type

154

GCS.,

Size

025".

Selection

of

proper

needle

size

is

determined

by

size

of

thread

used.

Thread

should

pass

freely

through

needle

eye

in

order

to

produce

a

good

stitch

formation.

Success

in

the

operation

of

Union

Special

machines

Gan

be

secured

only

by

use

of

needles

packaged

under

our

brand

name.,

~

.~

which

is

backed

by

a

re-

putation

for

producing

highest

quality

needles

in

materials

and

workmanship

for

more

than

three-

quarters

of

a

century.

CHANGING

NEEDLES

Release

pressure

on

presser

foot

by

turning

presser

foot

release

bushing

(AG.,

Fig.

1

or

lA)

and

swing

presser

arm

(U)

out

of

position.

Turn

handwheel

in

opera-

ting

direction

until

needles

are

at

their

lowest

point

of

travel.

Using

hexagonal

socket

wrench

No.

21388

AU.,

furnished

with

machine,

loosen

needle

clamp

nut

about

1/4

turn.

Again

turn

handwheel

until

needles

are

at

high

position.

Withdraw

needle.

To

replace

needles,

leave

needle

holder

at

high

position

and

with

the

flats

to

the

left,

insert

needles

in

holder

until

they

rest

against

stop

pin.

Keeping

needles

in

this

position.,

turn

handwheel

until

holder

is

again

at

its

low

point

of

travel;

then

tighten

nut.

Return

presser

arm

(U)

to

position;

re-lock

presser

foot

release

bush-

ing

(AG).

THREAD

STAND

39500

GB

ONLY

After

thread

comes

from

cones

on

cone

support

(A.,

Fig.

1)

it

is

brought

up

through

the

back

hole

of

thread

eyelet

(B),

then

continues

between

tension

disc

felts

(L).,

through

tension

post

slot

(K)

of

tension

post

(G).,

and

down

through

front

hole

of

thread

eyelet.

4

From the library of: Superior Sewing Machine & Supply LLC

THREAD

STAND

(Continued)

39500

GC-045

ONLY

After

thread

comes

from

cones

on

cone

support

(A.,

Fig"

lA)

it

is

brought

up

through

the

back

hole

of

thread

eyelet

(B),

then

down

through

the

front

hole

of

thread

eyeleto

Now

..

on

all

styles

the

upper

looper

thread

and

the

left

needle

thread

is

thread-

ed

through

the

upper

holes

(left

and

middle

respectively)

of

tension

thread

guide

(C.,

Fig.

1

or

lA)

from

front

to

backo

Then

through

the

lower

holes

from

back

to

fronto

The

right

needle

thread

is

threaded

through

the

tension

thread

guide

(C)..

first

through

the

upper

hole

back

to

front

..

second

through

the

middle

hole

front

to

back

and

third

through

the

lower

hole

back

to

fronto

All

threads

then

continue

between

the

tension

discs

(J).,

through

tension

post

slot

(K)

in

tension

post

(G)

and

on

through

front

thread

guide

(M).

THREADING

Only

parts

involved

in

threading

are

shown

in

threading

diagrams

(Fig"

1

and

lA)o

Parts

are

placed

in

their

relative

positions

for

clarityo

Refer

to

Figo

1

for

threading

of

Style

39500

GB

or

refer

to

Figo

lA

for

threading

of

Style

39500

GC-045o

It

will

simplify

the

threading

of

these

machines

to

follow

the

recommended

se-

quence

of

threading

the

upper

looper

first

..

the

right

needle

second

and

the

left

nee-

dle

third.

Complete

the

full

threading

of

one

before

proceeding

to

the

Before

beginning

to

thread,

swing

cloth

plate

open

..

turn

handwheel

in

operating

direction

until

needles

{X)

are

in

high

position.

Release

pressure

on

pr~~sser

foot

by

turning

presser

foot

release

bushing

(AG);

and

swing

presser

arm

(U)

out

of

posi-

tion.

Be

sure

the

threads..

as

they

come

from

the

tension

thread

guide

(C)

are

be-

tween

tension

discs

(J)

and

in

tension_post

slot

(K)

in

tension

post

(G).

The

tension

posts

should

be

positioned

so

the

tension

post

slot

will

be

at

the

approximate

angle

for

the

different

threads

as

indicated

in

Fig.

1

and

lAo

TO

THREAD

UPPER

LOOPER

Turn

handwheel

until

point

of

upper

looper

(W)

is

all

the

way

left.

Lead

thread

through

auxiliary

looper

thread

eyelet

(P)

from

back

to

front

..

then

through

both

eyes

of

upper

looper

thread

eyelet

(N)

from

left

to

righto

NOTE:

Thread

must

pass

in

front

of

looper

thread

pull-off

(AF).

After

pulling

up

upper

looper

thread

tube

assembly

(AA)..

lead

the

thread

under

neck

of

top

cover

casting

and

down

through

thread

tube

assembly

(AA).

This

is

easily

accomplished

by

using

the

forked

end

of

the

threading

wire,

supplied

with

each

machineo

Pull

thread

out

bottom

of

tube

using

hooked

end

of

tweezers.,

also

supplied

with

each

machine.

Push

tube

down

..

and

then

insert

thread

through

upper

looper

eye

from

front

to

back.

CAUTION!

Be

sure

upper

looper

thread

is

under

the

needle

threads

when

passing

from

tube

assembly

to

upper

looper

eyeo

TO

THREAD

NEEDLES

Turn

handwheel

in

operating

direction

until

needles

(X)

are

at

their

highest

position.

Insert

both

needle

threads

from

right

to

left.,

through

BOTH

eyes

of

nee-

dle

thread

eyelet

(AD).,

under

neck

of

top

cover

casting

and

then

down

through

holes

in

top

cover

needle

thread

eyelet

(AC).

The

right

needle

thread

should

be

threaded

in

the

right

hole

and

the

left

needle

thread

through

the

left

hole

of

the

top

cover

needle

thread

eyeleto

Thread

needles

from

the

fronto

5

From the library of: Superior Sewing Machine & Supply LLC

li]Tension

Nut

(IT

e

nsi

on

Sprin

g

~

/

tv

Fe

rrul

e

~

IJTension

Spring~~..-~~._,,,

[!]T

ension

Post~

I::Jspring

Shield ....

-::--~

?;

OT

ension Di

scs·<

./

[I

Tension

Post

Slot.. --

..

.

nTension

Disc

Fe

lt

··.. ·.

f!]

Front

Thr

ead Guide

~~Auxiliary

Lo

oper

Thr

ea

d

Eyelet

~Upper

Loop

er

Thread

Eyelet

Fig

. 1

~~~~

(;]Tension

Nut

~~Tension

Sprin

g

~..-.!~~:i.l

Ferrule

IITension

Spring

[!]Tension

Post

DTension

Discs

..

_

~~Tension

Post

Slott

·

'liiiii

·

;;~~

·-

~

-

~~.,...

IITension

Disc

Felt

•---

-FJCone Support

Upp

er

Looper

Thread

Tube

Ass

embly

aLow

er

Spr

ea

der

£.t

Needle~

/

6

From the library of: Superior Sewing Machine & Supply LLC

m

Tension

Nut

gTension

Spring

F

e

r~

OTension

Spring~~~~

'"

[!lT

e

nsion

Post

ll)spring

Shield

n

Tension

Discs

·

....

(3

Tension

Post

Slot :

n

Tension

Disc

Fe

lt

·

..

[i

Tension

Thread

Gu

de

~Front

Thread

Guide

~Upper

Looper

Thread

Eyelet

m

Presser

Arm

Fig

.

lA

7

Presser

Foot

..--

·

...

~m~

Release

Bushing

Top

Cover

_.....,,..Needle

Thread

Eyelet

Upper

Looper

Thread

Tube

A3sembly

~::;.J-,Iof"\"

-

~Upper

Looper

From the library of: Superior Sewing Machine & Supply LLC

THREAD

TENSION

The

amount

of

tension

on

the

needle

and

looper

threads

is

regulated

by

three

tension

nuts

(D,

Fig.

1

or

1A).

Tension

on

threads

should

be

only

sufficient

to

se

-

cure

proper

stitch

formation.

PRESSE

R

FOOT

PRESSURE

Sufficient

p

resser

foot

pressure

to

feed

work

un

iform

ly

should

be

maintained.

Should

it

be

necessary

to

i

ncrease

or

decrease

amount

of

pressure

on

presser

foot~

loosen

l

ock

nut

(

A~

Fig

.

2)

and

turn

adjusting

screw

(B).

Adjusting

screw

has

a

right

hand

thread,

so

tightening

increases

pressure

~

loosening

decreases

pre

ssur

e.

VVhen

pressure

adjusting

screw

(B) h

as

b

een

properly

set

,

tight

en

lock

nut

(A).

VVith

presser

foot

resting

on

throat

plate~

position

locking

nut

(C)

so

that

its

under

surface

is

approximately

1I32

inch

to

1I16

inch

from

the

top

surface

of

adjusting

screw

(B).

Set

cap

(D)

against

locking

nut

(C).

FEE

D

ECCENTRICS

Feed

eccentrics

used

in

th

e

395

00

GB

machine

have

Fig.

2

been

se

l

ec

ted

to

produce

approximately

80

stitches

per

inch

.

On

the

39500

GC

ma

-

chine,

eccentr

ic

s

hav

e

been

selected

to

produce

approximately

35

stitches

per

inch

.

It

will

be

noted

on

the

39500

GB

machine

that

the

part

number

of

the

main

feed

eccentric

is

No.

39540

B-

100,

while

that

of

the

differential

feed

eccentric

is

No

.

3954

0 B-

70.

Mi

n

or

numb

ers

of

the

part

symbol

indicate

approximately

the

number

of

st

itches

ob

tain

able

when

using

that

eccen

t

ric

.

Unless

otherwise

specified

,

the

395

00

GB

machine

will

be

shipped

wi

th

above

combination

of

eccentrics

.

The

395

00

GC

machine

will

be

shipped

with

No.

39540

B-

60

main

feed

eccentric

and

No

.

39540

B- 30

differe

nti

al

feed

eccen

t

ric

.

G

ene

rally

sp

eaking,

differen

ti

al

(ri

ght

hand)

feed

eccentr

i c

determines

number

of

stitches

produced.

Main

(l

eft

hand)

f

eed

ecce

ntric

is

sel

ected

in

relation

to

de-

gree

and

direction

of

stretch

of

material

being

sewn

,

or

type

of

operation

.

Following

stitc

h

number

feed

eccentrics

are

available

under

No.

3954

0 B-

4,

5

~

6,

7,

8,

9

~

10~

11, 12, 13,

14,

15,

16

, 18, 20, 22, 24, 26,

28

, 30, 32,

34

, 36,

40

, 50,

60,

70

~

1

00

.

Only

two

eccentrics

are

supplied

with

each

m

ac

hin

e.

Additional

eccentrics

may

be

ordered

separately

.

To

order

,

use

No

.

3954

0 B

with

a

minor

number

s u

ffixed

to

indicate

number

of

stitches

desired.

Exampl

e:

11

39540

B

-1

00

11

•

A

SSE

MBL

I

NG

AN

D AD

JUSTING

SE

VV

I

NG

PARTS

Before

assembling

and

ad

j

ust

in

g

sewing

par

ts,

remove

cloth

pl

ate,

fab

ric

guard

,

chip

guard,

upper

knife

assem

bl

y,

lower

knife

holder

assemb

ly

.

Then,

fol

-

l

ow

th

is

suggested

sequ

e

nc

e:

SETT

ING

THE

NEEDL

E

VVith

throat

plate

assembled

in

position

,

needles

should

cente

r

in

the

front

end

of

needle

slot

. VVhen

need

l

es

are

at

h

igh

position,

th

e

need

le

points

should

be

set

1

5132

inch

a-

b

ove

th

e

throat

plate

(Fig. 3)

for

Style

39500

GC

-

045

.

For

Style

395

00

GB

the

n

eed

le

po

int

s

should

be

set

7116 i

nch

a-

bo

ve

the

throat

plat e.

To

alig

n

need

le

or

set

the

height

above

th

e

throat

pl

ate,

move

needle

driving

arm

(A,

Fig

.

3)

by

lo

o-

sening

clamp

scr

ew

(B

).

Remove

throat

plate.

8

Fig

. 3

From the library of: Superior Sewing Machine & Supply LLC

SETTING

THE

NEEDLE

(

Continued)

At

this

point,

insert

lower

spreader

(A, F i

g.

4)

into

bar

(C).

With

lower

spreader

at

the

left

end

of

its

str

oke

,

set

th

e

spreader

point

1

18

inch

from

center

of

left

need

le,

using

looper

gauge

No

.

21225

G-

118

.

Do

not

have

lower

spr

eader

d

eflec

ting

the

needles

.

Tighten

nut

(B).

Now

assembly

diff

e

rentia

l

(front)

feed

dog

.

SETT

I

NG

THE

REAR

NEED

LE

GUARD

Set

rear

needle

guard

(A,

Fig

. 5)

as

high

as

possible

,

wi

tho

ut

interf

ering

with

either

lower

spreader

or

movement

of

lower

knife

holder

,

but

still

in

position

to

deflec

t

needle

forward

•

002

to

•

004

inch

.

Fig

. 4

Screw

(B)

is

used

to

s

et

the

rear

nee

dle

guard

.

Make

sure

t

here

is

no

interference

between

the

rear

needle

guard

and

lower

spreader.

F i

g.

6

SETT

I

NG

THE

LOWER

SPREADER

Now

,

finish

lower

spreader

ad

j

ustment.

As

spreader

moves

to

the

r i

ght

,

its

poin

t

should

be

set

into

the

needle

scar

fs

(A,

Fig

. 6)

until

needles

spr

in

g

forward

from

rear

guard

surfac

e

another

•

002

to

•

00

4

inch

.

SETTING

THE

FRONT

NEEDLE

GUARD

F

ig

. 5

Assemble

front

needle

guard

(C,

Fig

.

5)

.

Whe

n

lo

w

er

spreader

is

springing

needle

off

backguard,

set

the

front

needle

guard

as

close

as

possible

to

need

les

wit

h

out

touchi

ng.

Screw

(D)

is

used

to

adjust

and

set

front

needle

guard

.

Af

ter

this

set

-

ting,

make

sure

there

is

no

interfer

e

nce

between

the

needle

guards

and

differential

feed

dog.

SET

TIN

G

THE

UPP

ER

LOOPER

Insert

upper

looper

(A,

Fig

. 7)

in

its

hold

er

.

Screw

(B)

ho

l

ds

upper

looper

in

its

holder

and

permits

it

to

be

pushed

in

or

out,

or

turned

arou

nd

its

shank

. I

nsert

upp

er

l

ooper

holder

in

to

upper

loop

er

s h

aft

(if

not

al

ready

in

place

).

Screw

(C)

on

th

e

clamp

h

olds

th

e

upper

looper

hold

er

in

th

e

sha

ft

. L

oca

t e

u

pper

loop

er

in

its

holder

so

that

the

shank

extends

1I

64

to

1I32

inch

beyond

holder

(Fig.

7).

Fig.

7

When

the

upper

looper

is

at

the

right

end

of

its

stroke

,

u

pper

looper

h

older

sh

oul

d be

set

to

p

osition

upp

er

l

ooper

shank

slightly

back

of

vertical

.

Next,

turn

the

h

andwheel

until

looper

is

at

the

left

en

d

of

it

s

travel.

Ch

eck

the

di

mensions

of

the

upper

looper

point

wi

th

r

espect

to

needle

and

throat

plate

(Fig

.

8)

and

the

following

di

mensions

;

dis

t an

ce

from

centerline

of

left

needle

to

point

of

loop

er

should

be

approximately

5132

inch

and

dis

tanc

e

from

throat

plate

to

point

of

looper

should

be

approximately

15

I32

in

ch

on

Style

3950

0

GC

-

045

machine.

(

Fig

.

8)

.

9

From the library of: Superior Sewing Machine & Supply LLC

SETTING

THE

UPPER

LOOPER

(Continued)

NOTE:

For

Style

395

00

GB,

the

dimensional

setting

of

the

upper

looper

point

with

respect

to

the

center

of

the

left

is

also

5I32

inch,

but

the

se

t

ting

of

the

upper

looper

point

with

respect

to

the

throat

plate

is

approximately

7I

16

inch.

If

resetting

is

necessary,

do

so

by

moving

the

upper

looper

holder

(A,

Fig.

8).

Figure

8

repre-

sents

the

dimensional

setting

for

Style

39500

GC

-

045.

When

the

correct

setting

is

ob

tained,

it

can

be

checked

quickly

as

follows:

As

upper

looper

is

moving

to

the

right,

wh

en

upper

loo-

per

eye

centers

on

the

right

ne

ed

le,

the

eyes

of

the

upper

looper

and

right

needle

should

align

(Fig.

9).

Check

setting

to

avoid

interference

be

-

Fig.

8

tween

upper

looper

and

needles

on

needle

down

stroke.

If

needles

rub

the

back

of

upper

looper,

pull

looper

out

of

its

holder

slightly

and

rotate

a

short

distance

counterclockwise,

looking

from

left

end

of

machine.

Reset

to

maintain

dimensions

suggested

a

bove

and

in

Figs.

8

and

9.

Fig.

9

SETTING

THE

FEED

DOGS

Assemble

and

set

the

differential

feed

dog

(A,

Fig.

so

that

top

surfaces

of

the

feed

surfaces

all

lay

in

the

ch

e

cked

by

sighting

across

feed

-

ing

surface

with

a

straight

edge.

Feed

surfaces

should

now

be

le-

veled

with

the

throat

plate

surfaces

by

rotating

fe

ed

tilting

adjusting

(D).

This

raises

or

lo

wers

the

back

end

of

both

feed

bars

at

the

same

time.

The

feeding

surfaces

should

be

set

level

at

the

time

feeding

surface

first

appears

above

the

throat

plate.

Screw

(E)

locks

feed

tilting

adjusting

in

place.

Now,

set

feeding

surfaces

so

they

rise

above

3164

inch

above

throat

plate.

10)

and

main

feed

dog

(B)

same

plane.

This

can

be

Fig.

10

Set

chaining

feed

dog

(C)

level

with

top

of

throat

plate

when

feed

dog

is

at

top

of

its

travel.

SETTING

THE

LOWER

KNIFE

Replace

low

er

knife

holder

assembly.

Lower

knife

(A,

Fig.

11)

should

be

set

with

cutting

edge

flush

with

throat

plate

surface.

Adjustments

are

made

with

hexa-

gonal

head

screw

which

holds

lower

knife.

Lower

knife

is

spring

pressed

against

upper

knife,

so

no

lateral

adjustment

is

necessary

when

width

of

trim

is

changed

.

10

From the library of: Superior Sewing Machine & Supply LLC

UnionSpecial 39500GB Hoja de instrucciones

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