UnionSpecial P300-0 Series User manual

FINEST QUA LITY
S TYLES
P300- 0/1 94
P300-0/ 201
P300-0/401
CATALOG
NO.
P21323
Form P21323
Rev. (566)
CLASS P300-0
"'
INDUSTRIAL
SEWING
MACHINES
SINGLE & MULTIPLE NEEDLE, NEEDLE FEED
DOUBLE LOCKED STITCH MACHINES FOR
GENERAL STITCHING OPERATIONS ON MEDIUM
TO HEAVY WEIGHT MATERIALS
UNION SPECIAL CORPORATION
CHICAGO
From the library of: Superior Sewing Machine & Supply LLC

CONTENTS
DESC~ I PTION. ............••.••...•.•........ 3
INSTALLATION ..•••......••••...•..•...•.... 4
LUBRICATION ......•.....••••............. •. 5
Description of Machine ......••.....•..•...•.... 3
Genera I Charocteri sties ..•.•.......•..••..•.. 3
Special Features •.•...••••••..•......•..... 3
Feed Bar, Height .....•..•.•••••..•.••..•..... 12
Feed Dog, Centralizing .....•••....•.....••..•. 12
Height ....•.......••....•••.......•....•• 12
Lengthwise Setting ........................ 12
Sidewise Setting ..•..•...•••.•........•... 12
Timing .••.•.•.. . ...•..•••••..•..••....•. . 13
Feed Roll, Pressure ........................... 9
Installation ..•.......•..•••••••.•..•...•..... 4
Loop
Deflector ••.••.••..•.••.••..•.........•• 13
Looper, Positioning •.•..••.••.•.•..•..•.....• • 14
Lengthwise Setting .....•.••.•..•.....•.•.. .14
Sidewise Setting •..•..•.••••.•........•.... 14
Timing •.•.•.•..•..•.•.•••••..........•.•• 15
Lubrication ....•..•.••.••.•.••••..•..•........ 5
Arm Shaft .••..••..•..•..•••••..•.•...•.••.. 5
Bed
Shaft ...•..•.•..•.•.•••......•.......•. 5
Other Points •..........•••.•.•..••••....... 5
OPERATOR INFORMATION .................. S-8
ADJUSTMENTS ............................ 8-17
IHDEX
Needles •.•....••..•.........•.••.••.....•••.. 6
Setting
•...•.••.••..•..•........••••..•••.. 6
Needle Bar, Height
•.•.••..•..•....•...••..•••• 14
Needle Bar, Position ••.•.•...•....••.•...••••• 13
Needle Guard, .•......•...••...•••.•..•..•••.. 15
Presser Bar, Height •..••••.....•..•....•..•••• 11
Presser Foot, Pressure ...................... 8, 9
Speed •.•.•..••.•.....•.•.•••.•.•••...•••.••.. 5
Stitch Length .•.••..•..•.•..••.•..••.•••.•••. .10
Spreader, Positioni ng ••.•.•.....•••.•..•••••••• 16
Lengthwise Setting •.......•..•..•.•••..••• 16
Sidewise and Height Setting
..•...•......•••• 16
Toke-up, Adjustment .•..•..•.........••.•..••• 17
Looper Thread .••.•..••.•.•.•••.•••.•.•••• 17
Needle Thread .•..••••....•.••.•...••..••• 17
Tension .•..•.••.••....•..•....••.••.••.•.••.• 8
Releaser
...•.•..••.•.••..•.•..••..•.••.•• 17
Threading .•..•......••.•..•..••..••..••..•••• 7
Upper
.•.....••.•.....•.....•.•..••.••.•••• 7
Lower
••••.•••....••.••..••••••.••••...••• 7
From the library of: Superior Sewing Machine & Supply LLC

Machines of Class P300-o are high speed, needle
feed, two thread
chainstitch machines designed for
general
stitching operations on materials of medium
and heavy
weight.
These machines are available for single needle
or
multiple needle stitching operations such as seam-
ing, binding,
welting, lap seam felling, etc., they
perform outstanding work
on trousers, work clothing,
automotive upholstery, tents, tarpaulins, seat covers
and a
variety of other products.
General
Characteristics
Belt driven arm shaft mounted in front and rear
ball bearings.
Belt driven bed shaft.
Semi-automatic
lubricating system with large ca-
pacity oi I reservior in upper and lower shafts lubri-
cates all principal bearings.
Presser
foot is raised by a treadle operated foot
lifter which also releases the needle thread tension.
Space at right of needle, 10 inches.
Special Features
Style P300-0/194
One needle and one looper.
Alternating pressers with pneumatic pressure con-
trol.
Stitch length, 4 to 12 per inch.
Needle bar stroke, 1-7/16 inches.
Clearance under presser feet, 1/2 inch.
Anti-reversing mechanism.
DESCRIPTION
3
Machine P300-0/201
Two needles and two loopers.
Stitch length, 4 to 12 per inch.
Needle bar stroke,
1-1/4 inches.
Clearance under pressure foot,
3/8 inch.
Gauges (Needle Spacing): 3/16 inch to 2 inches
in steps of 1/32 inch.
Standard gauges, 3/16 inch, 1/4 inch, 3/8 inch,
1/2 inch, 5/8 inch, 3/4 inch, 1-1/4 inches and 1-1/2
inches.
Machine P300-o/401
Four needles and four loopers.
Stitch length, 4 to 12 per inch.
Needle bar stroke,
1-1 I4 inches.
Clearance under presser foot,
3/8 inch.
Gauges (Needle Spacing):
3/4 inch to 2 inches
between
outside needles.
Standard gauges, 1/4 inch -1/4 Inch -1/4 inch,
5/16 inch - 5/16 inch - 5/16 inch, 3/8 inch- 3/8
inch - 3/8 inch, 1/2 inch -1/2 inch -1/2 inch, 1/4
inch- 1 inch- 1/4 inch.
From the library of: Superior Sewing Machine & Supply LLC

HANGERS
OIL PAN
FOOT LIFTER
LEVER
Fig. 3
Fig. 4
Fig. 2
4
INSTALLATION
Assemble oil pan to hangers. Insert assembled
oil pan into machine cut-out of table placing four
rubber
bushings in hanger holes as shown in Fig. 2.
Attach oi I drain jar to oiI pan as shown in Fig. 3.
F-lace machine on oil pan assembly with the
four bed pins passing through the four rubber bush-
ings shown in Fig. 2.
Connect foot Iifter· treadle to foot Iifter lever,
Fig. 4, at back of machine by cha in furnished for
this purpose.
From the library of: Superior Sewing Machine & Supply LLC

LUBRICATION
Machines of Class P300-o have a semi-automatic
lubricating system comprising a
hollow arm shaft
and a hollow bed shaft which act as oil reservoirs.
The
oil is distributed to all of the principal bearings
by centrifugal force through small jets in the shafts
when the machine
is in operation. Provision is also
made for hand lubricating other movable parts which
are not lubricated from the reservoirs.
CAUTION:
Use Union Special Oil, Specification 175, a water
white straight mineral oil of a saybolt viscosity of
90 to 125 seconds at 100 degrees farenheit.
Do not use additives in sewing machine oil as
the-y may cause a reduction in the normal flow of
oil that can result in damage to the machine.
BEFORE STARTING machine, the machine must
be oiled as instructed. Failure to do this wi II result
in damage to the machine.
Pressure Oil Can, furnished with the machine, is
to be used to oil all points requiring lubrication.
TO OIL ARM SHAFT
To fi II arm shaft reservoir, insert spout of pres-
sure oil can in hole, Fig. 5, and inject 1 shot of
oi I into
shaft twice daily.
TO OIL BED SHAFT
To fill bed shaft reservoir, push spring cover,
Fig. 6, to the left, insert spout of pressure oil can
into hole and inject 1 shot of oil into shaft twice
daily. Close oil hole spring cover.
NOTE: Bed shaft may also be oiled from right
hand end of machine.
OTHER OILING POINTS
Apply oil to all work plate and arm oil holes,
needle bar bearings and connections, needle bar rock
frame
bearings, looper rocker sleeve and presser
lifting mechanism.
CAUTION: For machines in continuous use, all
oiling points must be oiled daily. Occasionally oil
tension release mechanism and looper pull-out rack .
5
,... s
SPEED
Maximum speed for Style P300-0/194 is 4000
stitches per minute.
It is advisable to operate new machines at a
speed of
500 stitches less than maximum for the first
100 hours of operation.
Maximum
efficient speed is determined upon the
nature of the operation, the
ability of the operator
and the type of material being sewn.
Maximum speed for Machines P300-Q/201, P300-
0/401
is 4500 stitches oer minute.
From the library of: Superior Sewing Machine & Supply LLC

MOVE TO
HIGHEST POINT
MOVE TO
HIGHEST POINT
SCARF OF NEEDLE
TOWARD LEFT
Fig. 7
LOOSEN
SCREW
LOOSEN
SCREWS
6
NEEDLES
Machines P300-Q/201, P300-0/401 use Needles,
Catalog P3260 (62 x 57).
For heavier weight material, needle Catalog
P-
4112 (62x59) may also be used. In this case, the
needle bar must
be adjusted as instructed on page
13.P300-0/194 use Needles, Catalog P4112
(62 x 59)
for medium heavy work or Catalog P3260 (62 x 57)
for medium
light work.
The size of the needle to be used is determined
by the size of the thread which must pass freely
through the eye of the needI e.
Orders for needles should specify quantity re-
quired, size number and catalog number.
To Set
The Needle
Turn machine pulley over toward the operator
until the needle bar is at its highest point, as shown
in Fig. 7.
Loosen needle set screw on single needle ma-
chines or needle clamping screws on multiple needle
machines, as shown in Fig. 7.
Insert needle into needle bar or clamp as far as
it will go making certain that the scarf of each
needle faces toward the left, as shown in Fig. 7.
THREAD
Either left
twist or right twist thread may be
used in the needles and loopers.
Rough or uneven thread, or thread which passes
through the needle eye with difficulty wi II interfer
with
successful operation of the machine.
From the library of: Superior Sewing Machine & Supply LLC

THREADitolG THE MACHINE
Upper Threading
Turn machine pulley over toward operator until
needle bar is at its highest point.
Pass thread from unwi nder through thread ing
points indicated in Fig. 8. See insert, Fig. 8, for
correct threading of needle.
Draw approximately two inches of thread through
needle eye with which to start sewing.
Fig. 8
LOOP!R THROW-OUT
RACK ROD
LOOP ! R THROW-OUT
GE AR LOCKING PLUNG ! R ROD
7
Single and multiple needle machines are all
threaded as shown in Fig. 8. Make certain that each
thread passes through thread tension
device.
Machines of Class P300-Q having Alternating
Pressers are equipped with a thread lubricator on
front of the arm. The needle thread must pass through
the lubricator.
Lower Threading
Open front table section, remove bed slide and
turn machine
pulley over toward operator untiI needle
bar is at its highest point.
Move
loopers out of sewing position by pulling
looper throw-out gear locking plunger rod and looper
throw-out
rack rod, Fig. 8, out as far as possible.
This will place loopers in pos ition for· eas i er thread·
ingand prevent accidental operation of machine until
loopers
are returned to sewing position.
Threading The Loopers
Pass thread from unwinder through threading
points as indicated. Draw approximately two inches
of thread through looper eye with which to start
sewing.
From the library of: Superior Sewing Machine & Supply LLC

MORE
TENSION
PRESSURE
LESS
TENSION
Fig. 9
Fig. 10
LOOPER
THREADS
Pressure on material should be as light as pos-
sible while still sufficient to insure correct feeding.
Presser Foot Pressure
To regulate presser foot pressure, loosen lock
screw, Fig. 11, at rear of machine. Tighten thumb
screw to increase pressute; loosen to decrease
pressure . When correct feeding pressure is attained,
tighten lock screw.
THUMB SCREW
Fig. 11
LOCK
SCREW
8
TENSION
Tension on thread should be light as possible
while still sufficient to set the stitch correctly in
material.
Needle Thread Tension
To regulate needle thread tension, turn thumb
screw, indicated in Fig. 9, as may be required.
IMPORTANT: Regulate needle thread tension
only when pre~ser foot is down.
Looper Thread Tension
To regulate looper thread tension, turn thumb
screws, as indicated in Fig. 10, as may be required.
Alternating Pressers:
To increase pressure, loosen lower lock nut and
loosen lock screw, then tighten upper lock nut,
see Fig. 12. When correct pressure is attained,
tighten lock screw. Then tighten the lower lock nut.
To decrease pressure, loosen upper lock nut• and
loosen lock screw, then tighten lower lock nut.
When correct pressure is attained, tighten lock
screw. Then tighten the upper lock nut.
Fig. 12
From the library of: Superior Sewing Machine & Supply LLC

Alternating Presser with
Pneumatic Pressure Control:
Adjust height of Pressure Cylinder with presser
feet resting on throat plate. There should be a clear-
ance of 1/ 4 inch between the Presser Bar Spring
Fork
and the bottom of the cylinder. To raise cylin-
der, loosen lower lock nut and tighten upper lock
nut, see Fig. 13. To lower cylinder, loosen upper
lock nut and
tighten lower lock nut. When correct
adjustment is attained, tighten both lock nuts.
9
Upper Feed Roll Pressure
To regulate pressure of the upper feed roll, turn
thumb screw as shown in Fig. 15.
INCREASE~
PRESSURE~
b ~ .. DECREASE ;~·)
u ..... ·
~~RESSURE •.... -·····-~ ,.··
/.---· · ·· ··
'
_ ... -·
.- -
·· .. ~ . _ . .... -··"
Fig. 15
From the library of: Superior Sewing Machine & Supply LLC

WORM
GEAR
SET SCREWS
PLUNGER
Fig. 16
COVER
PLATE
Fig. 17
SET
SCREWS
BUTTON
NEEDLE
BEARING
10
STITCH LENGTH
To adjust the stitch length, depress plunger,
Fig. 16, located on top of arm. Continue to hold
plunger down and turn machine pulley toward opera-
tor unti I plunger enters notch in arm shaft eccentric.
Then turn plunger to lock in position. Depress but-
ton, Fig. 16, located on machine bed. Hold down,
and turn machine pulley toward
operator to increase
length of stitch, or away from operator to decrease
length of stitch. Letter "A" on machine pulley in·
dicates the longest stitch. When desired length, in-
dicated by letter, is opposite arrow on front of ma-
chine, release button and turn plunger to right or
left untiI it springs outward.
CAUTION: Never turn machine pulley with plung·
er in locked posit ion until button on machine bed
is depressed.
Machine with Puller Feed
The length of the stitch is determined by the
stitch gears in the puller feed mechanism. The
compound feed stitch length should be set slightly
shorter than the stitch length of the puller feed.
To change Puller Feed gears for adjusting stitch
length, remove the two cover plate screws and re-
move cover plate, F ig. 17. Loosen set screws. Slide
puller feed shaft to the right far enough to allow re-
moval of worm and worm gear. Place the new worm
on
cross shaft. Turn worm in the operating direction
and tighten the first set screw into the flat of the
shaft. Then securely tighten both set screws, check-
ing for excess i ve end ploy. Engage the new worm
gearwith the wormand slide puller feed shaft through
the worm gear untiI the end of the shaft is flush
with the needle bearing. Remove end play in the
shaft by setting the two collars against the bracket
and tightening the four set screws. Align the lower
feed
roll with the upper feed roll and tighten the two
set screws. Center the worm gear on the center of
the worm. Tighten the two set screws with the first
screw in the spline of the shaft. Replace cover
plate and adjust the compound feed.
From the library of: Superior Sewing Machine & Supply LLC