Singer 221 Bedienungsanleitung

Supplement to

Form 21325

Machine 221

(566)

SERVICE MANUAL

SINGER*

MACHINE 221

Lightweight portable lockstitch machine with

reversible drop feed and electric drive. The motor is mounted on machine bed. Wiring to

motor and light is concealed in machine arm and

bed. The machine is equipped with a foot controller.

(Note: Machine 221K4 is also equipped with R. F.

Suppressors and grounded wiring.)

Rotary hook on horizontal axis, makes two rev-

olutions per stitch.

Light and light shade attached to front of ma-

chine arm with control switch located on bed. (Ma-

chine 221K4 has light switch built into the light

socket.)

Machine 221K7 is equipped with belt linkage be-

tween arm and hook shafts. Other varieties are

equipped with an upright arm shaft and gears.

Machine base 10-7/64 inches long, 7-1/4 inches

wide. Space at right of needle, 5 inches.

Presser bar light: 5/16 inch. Feed dog height:

.040 inch above throat plate.

Manually controlled bobbin winder attached to

belt guard.

Needle, Cat. 2020 (15xl), threaded from right

to left.

STITCH LENGTH

REGULATOR

BOBBIN-WINDING

THREAD GUIDE

{

221.1- SERIES 3

221K4· CAK7

MOTOR 221K5- CAJ6-8

221K7:CAK8-8

Before inspection to find causes of faulty opera-

tion, the machine should be thoroughly cleaned

and lubricated.

Remove face plate and throat plate. Open arm

top cover and remove bottom cover.

Remove Iint and other foreign matter that may

have acc umu lated around the sewi ng area and clean

all exposed mov ing parts with a broom type ny Ion

brush dipped in varso '

CAUTION: KEEP VARSOL AWAY FROM ALL

RUBBER PARTS

Note: Under extreme conditions (if grease and

dirt is hard and tacky) remove motor, light and

wiring, as instructed on page 25, and soak machine

in a tan k of varsol unti I so lids have become softened.

CAUTION:

Before dipping Machine 221K7 in

varsol, it wi II be necessary to remove the Arm Shaft

Connection Belt, as instructed on page 24.

With the face plate removed and arm top cover

removed or turned aside, apply a small amount of oil

or lubricant to each of the points indicated in Figs.

3, 4 and 5. Close arm top cover and replace face

plate.

T urn machine on its side, remove bottom cover

and apply oil or lubricant to each of the points In-

LUBRICANT

(Gear-Dr iven

Machine Only)

Never use oi Ior ordinary gear grease to lubricate

motor. Entrance of oil into motor may cause failure

of electrical components. Use MOTOR LUBRICANT

sold by The Singer Company.

The two motor grease tubes, Fig. 7/ should be

refi lied every 6 to 12 months, depending on machine

usage.

When presser foot is raised to highest point, dis-

tance between bottom of presser foot and top surface

of throat plate should be 5/16 inch, as shown in Fig.

8. (Note: The needle clamp, when at its lowest point,

should not strike the raised presser foot.)

Presser foot should be in alignment with throat

plate slots and feed dog, as shown in Fig. 9. Inset,

Fig. 9, shows correct alignment of presser foot with

need Ie.

Loosen, guide bracket set screw shown in Fig. 8

and raise or lower presser bar as required to obtain

correct he ight.

AIign presser foot with throat plate slots and

needle as shown in Fig. 9.

1. Remove bottom cover.

2. Set stitch length regulator for 12 to 15 stitches

per inch.

3. Turn hand wheel toward operator unt iI feed dog

is in its highest position.

With feed dog at highest poi nt, approxi mate Iy the

full depth of rear teeth should project above top

surface of throat plate.

Loosen hinge nut on FEED LIFTING ROCK

SHAFT, Fig. 12, and turn eccentric hinge screw

unti I high poi nt of eccentr ic is toward rotary hook

shaft. Then turn eccentric hinge screw as required to

correct he ight.

TO POSITION FEED DOG

IN THROAT PLATE SLOTS

Loosen hinge nut on FEED ROCK SHAFT, Fig.

12, and turn eccentric hinge screw until high point

of eccentric is away from rotary hook shaft. Then

turn eccentric screw as required to bring feed dog

in correct position.

Feed dog should move as close as possible to

front of throat plate slots without striking throat

plate.

FEED'

LIFTING

ROCK SHAFT

ECCENTRIC HINGE

SCREW

CENTER

SET SCREW

FEED LIFTING

ROCK SHAFT

CENTER

SET SCREW

Feed dog should be centrally located between

the sides of the feed slots of the throat plate.

Loosen the four center set screws, Fig. 13, hold-

ing the feed rock shaft and feed lifting rock shaft

centers In place. To move feed dog toward the left,

gently tap the right hand center of the feed rock

shaft and feed

ifting rock shaft to the left unti

feed

dog is correctly positioned. Then tighten the four

set screws. To move feed dog toward the right, gently

tap the left hand centers to the right unti Ifeed do,g

is correctly positioned.

NOT E:

Check for end play or binding in feed rock

shaft and feed lifting rock shaft. To adjust, loosen

center set screw at right end of mach ine and move

center as requi red.

T urn hand wheel over toward operator unti I needle

bar is at its lowest point. At this position, upper

timing mark, Fig. 14, should be just visible at lower

edge of needle bar bushing.

Loosen clamp screw/ Fig. 14, and raise or lower

needle bar as required. Make certain needle bar is

correctly turned with long groove in needle facing

toward right of mac.h ine. Then tighten clamp screw.

If there is any belief that the needle bar bushing

has been disturbed, it will be impossible to set the

needle bar by use of the timing marks.

Remove bobbin case and bobbin. With needle

threaded, hold thread end and turn hand wheel. over

toward operator unti I needle reaches its lowest point

and rises approximately 1110 inch. At this point the

needle thread loop should be fully formed, Fig. 15,

and ready for entrance of hook po int di rectly above

needle eye.

Loosen clamp screw, Fig. 14,

and

raise or lower

needle bar as required. Make certain long groove of

needle is facing toward right of machine an'd tighten

clamp screw. Then set the needle bar bushing.

With needle bar set at correct height, turn hand

wheel over toward operai or unti I need Ie bar is at its

lowest point. In this position the upper timing mark

on the needle bar should be at bottom edge of the

bushing.

Loosen needle bar bushing set screw, Fig. 14,

and raise or lower bushing as required. Then tighten

set screw.

BUSHING

SET SCREW

HOOK

POINT

NEEDLE

EYE

Remove throat plate and turn hand wheel over

toward operator unti I lower timing mark on needle

bar is at lower edge of needle bar bushing on its

upward stroke. With needle bar in this position, the

di stance between the side of needle and point of

hook, as shown in insert in Fig. 16, should be .005".

This is approximately the thickness of a piece of

ordinary note paper.

Loosen counterbalance set screw, Fig. 16, and

move counterbalance away from bushing. Loosen one

hook set screw. Turn bal ance wheel toward operator

to position needle bar as instructed above. Loosen

the other hook set screw and bushing set screw.

Using a 114" brass drift pin, gently tap bushing jo

left or right as required. Press hook assembly against

bushing and tighten hook and bush ing set screws. Re-

check setting and replace counterbalance with hub

against bushing.

LOWER

TIMING

MARK

HOOK POINT

ENTERING

THREAD LOOP UPWARD

STROKE

NEEDLE EYE

1/16

INCH BE LOW

HOOK POINT

Set needle bar height and position of hook to or

from needle as previously instructed.

With needle threaded, turn hand wheel over toward

operator unti I needle bar reaches lowest point and

rises to position where lower timing mark on needle

bar, Fig. 17, is just visible at lower edge of needle

bar bushing. With needle bar in this position, the

point of the hook should be approximately 1116"

above the needle eye and entering the needle thread

loop.

Remove bottom cover. Loosen rotating hook shaft

pulley set screws, Fig. 18, or hook shaft bevel gear

set screws in gear driven machines. Turn shaft man-

ually until point of hook is in its correct position

to the needle eye and needle thread loop, as shown

in Fig. 17. While holding hook in this position, tighten

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