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General| Brand | UnionSpecial |
|---|---|
| Model | 57700 Series |
| Category | Sewing Machine |
| Language | English |
Explains how Union Special machines are identified by style numbers.
Details how this catalog supplements Catalog No. 131 M.
Describes the features of the Class 57700 Advanced High Speed machine.
Information on needle types, sizes, and recommended needles.
Visual guide for threading and oiling the machine.
Guidance on machine lubrication, recommended oil, and gauge.
Steps for correct alignment of the needle bar.
Procedures for synchronizing looper and needle movements.
Instructions for setting the looper position and clearance.
How to adjust the height of the needle bar.
Procedure for setting the main feed dog height and position.
Adjusting the height and alignment of the differential feed dog.
How to adjust the differential feed ratio for stretching or gathering.
Method for adjusting the stitch length on the machine.
Instructions for setting front and rear needle guards.
Adjustment of the thread tension release mechanism.
How to set the correct height of the presser bar.
Setting needle and looper thread tensions for uniform stitches.
Adjusting the looper thread take-up for varying conditions.
Regulating the pressure exerted by the presser foot.
Exploded view and parts list for throat plate and related components.
Exploded view and parts list for presser foot, needle bar, and tension assemblies.
Exploded view and parts list for the differential feed mechanism.
Exploded view and parts list for drive system components.
Systems for tracking machine maintenance and repair costs.
Benefits of establishing a spare parts inventory system.
List of available Union Special bulletins and catalogs.
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