UnionSpecial 39500N Series Instruction sheet

FINEST QUALITY
STYLES
39500N
CATALOG
No.
103R
SECOND
EDITION
LEWIS • COLUMBIA
CLASS 39500 .
S TREAMLINED
®
INDUSTRIAL
S E WING
MACHINES
HIGH SPEED OVERSEAMERS
CH I CAGO
From the library of: Superior Sewing Machine & Supply LLC

---------------------------------------------------------------------
From the library of: Superior Sewing Machine & Supply LLC

Fe br ~ a ry. 1971
Catalog No. 103 R
INSTRUCTIONS
FOR
ADJUSTING AND OPERATING
LIST OF PARTS
CLASS 39500
Style
39500 N
Second E clition
Copyright 1957
by
Union Special Machin e Co.
Rights Reserved in All Countries
MACHINE COMPANY
INDUSTRIAL SEWING MACHINES
CHICAGO
Printed in U.S.A.
3
From the library of: Superior Sewing Machine & Supply LLC

FOREWORD
The Class 39500 machine is Union Special' s· latest overedger. New
streamlined styling, automatic lubrication, and light running high speed
performance are characteristics of these machines. All parts are made by
precision methods insuring complete interchangeability.
It is our constant aim to furnish carefully prepared information that will
enable the customer to secure all possible advantages from the use of Union
Specials. The following pages contain valuable operating and adjusting data,
and illustrates and describe the parts for Styles in Class 39500.
Union Special representatives will be found in all manufacturing centers,
anxious to cooperate with you to plan and estimate requirements.
~ MACH/NECOMPANY
Engineering Department
4
From the library of: Superior Sewing Machine & Supply LLC

IDENTIFICATION OF MACHINE
Each Union Sp e cial carries a Style number which is stamped in the 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 N". Special Style numbers contain the
letter "Z". When only minor changes are made in a standard machine, a "Z"
is suffixed to the standard Style number. Example: "Style 39500 NZ".
Styles of machines similar in construction are grouped under a Class num-
ber, which contains no letters. Example: "Class 39500".
APPLICATION OF CATALOG
This catalog applies specifically to the standard Styles of machines as listed
herein. It can also be applied with discretion to some special machines in
Class 39500. All references to directions, such as right and left, front and
back, etc .• are taken from the operator's position while seated at the machine.
Operating direction of handwheel is away from operator.
STYLES OF MACHINES
Single Curved Blade Needle, Two Looper, Three Thread, Overseaming Ma-
chine. Plain Feed, Trimming Mechanism with Spring Pressed Lower Knife,
Automatic Lubricating System.
39500 N For seaming garment pockets and similar operations on heavyweig-ht
fabrics. Seam specification 504 SSa-1, standard seam width 3/16 to 7/32
inch; stitch range 8-20 per inch
1
standard setting 12 per inch; cam adjusted
plain feed.
OILING
CAUTION! Oil was drained from machine when shipped, so reservoir
must be filled before beginning to operate. Oil capacity of Class 39500 is six
oun8es. 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 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.
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 periodi-
cally.
NEEDLES
Each UnionSpecialneedle has both type and size number. The type number
denotes the kind of shank, point, length, groove, finish and other details. Th e
size number, stamped on the needle shank, denotes largest diameter of blade,
measured in thousandths of an inch, midway between shank and eye. Collec-
tively, type and size number represent the complete symbol which is given on
the label of all needles packaged and sold by Union Special.
5
From the library of: Superior Sewing Machine & Supply LLC