UnionSpecial 53700B Adjusting Instructions And Illustrated Parts List

Also see for 53700B: Instructions and illustrainstructions and illustra instructions and illustrated parts manual

Contents

4IDENTIFICATION OF MACHINEEach UNION SPECIAL machine is identified by a Style number which is stamped into the name plate onthe machine. Style numbers are classified as standard and special. Those which are standard have oneor more letters suffixed to the class number, but never contain the letter "Z". Example : "53700B". Stylenumbers containing the letter "Z" are special. When only minor changes are made in a standard machine,a "Z" is merely suffixed to the standard style number. Example: "53700BZ".Styles of machines similar in construction are grouped under a class number which differs from the stylenumber, in that it contains no letters. Example: “53700”.APPLICATION OF CATALOGThis catalog applies specifically to the standard Styles of machines as listed herein. It can also beapplied with discretion to some Special Styles of machines in this class.STYLES OF MACHINE IN CLASSES 53700 AND 53800Streamlined Enclosed Type Flat Bed, High Throw, Power Driven Upper Running Feed, with AlternatingPresser Foot Action, Lower Feed, Single Reservoir Enclosed Automatic Lubricating System and FilterType Oil Return Pump, Lateral Looper Travel, 1 1/2 Inch Needle Travel, Work Space to Right ofNeedle, 7 3/4 Inches.53700B For seaming operations on automobile upholstery and similar articles made from mediumheavy to heavy weight materials, one needle machine, four to seven stitches per inch, seamspecification 401-SSa-1. Maximum recomended speed 3300 R.P.M.53800B For seaming operations on automobile upholstery, also on fiber, fabric, and plastic auto-mobile seat covers and for similar operations on medium heavy to heavy weight materialswith or without corded leatherette or plastic piping, two needle machine, four to sevenstitches per inch, seam specification 401-SSa-2. Maximum recomended speed 3300 R.P.M.NEEDLESEach UNION SPECIAL needle has both a type number and a size number. The type number denotes thekind of shank, point, length, groove, finish and other details. The size number, stamped on the needleshank, denotes the largest diameter of blade measured in thousandths of an inch midway between theshank and the eye. Collectively, type number and the size number is the complete symbol.Standard needle for Styles 53700 B, and 53800B is Type 147 GS. It is a round shank, round point, long,double groove, ball eye, spotted, short point, struck groove, undersize eye and grooves, one step reduction,chromium plated needle and is available in sizes 080/032, 090/036, 100/040, 110/044, 125/049, 140/054,150/060, 170/067.Also available for styles 53700B and 53800B is Type 143GS. It is a round shank, round point, No. 2 bag,double groove, spotted, chromium plated needle and is available in sizes 140/054, 150/060, 170/067.To have needle orders promptly and accurately filled, an empty package,a sample needle, or the type andsize number should be forwarded. Use description on label. A complete order would read: "11000Needles,Type 147 GS, Size 140/054".Selection of the proper needle size should be determined by the size of thread used. Thread should passfreely through needle eye in order to produce a good stitch formation.