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General| Type | Industrial Sewing Machine |
|---|---|
| Stitch Type | Lockstitch |
| Needle System | DB x 1 |
| Weight | 40 lbs |
| Dimensions | 17 x 8 x 12 inches |
| Operation | Manual |
| Bobbin | Class 15 |
| Stitch Options | Straight Stitch |
| Needle Positions | Single |
| Presser Feet | Standard |
| Voltage | 110V |
Details the common operational characteristics and design elements of the sewing machines.
Outlines the specific specifications and differences for models 281-1, 281-3, and 281-21.
Instructions for installing and adjusting the knee lifter mechanism for operation.
Explains the function and proper adjustment of the oil flow regulator for consistent lubrication.
Information on choosing the correct needle and the procedure for setting it into the needle bar.
Guidance on selecting appropriate thread types and determining thread twist for sewing.
Step-by-step instructions for threading the upper thread path on the sewing machine.
Covers bobbin removal, threading the bobbin case, and its proper replacement.
Instructions for adjusting needle and bobbin thread tensions for correct stitch formation.
Procedure for setting and regulating the desired stitch length on the machine.
Procedure for setting the correct height for the lower needle bar bushing.
Instructions on how to properly set the vertical height of the needle bar.
