AC-172N-1790AN - Sewing machine JUKI - Free user manual and instructions
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| Product Type | Industrial Double-Needle Lockstitch Sewing Machine |
| Brand | Juki |
| Model | AC-172N-1790AN |
| Dimensions (approx.) | 600 x 300 x 400 mm |
| Weight (approx.) | 30 kg |
| Power Supply | 220-240V, 50/60Hz |
| Motor Power | 400 W (Clutch Motor) |
| Stitch Type | Double-needle lockstitch (301) |
| Max Sewing Speed | 3,000 stitches per minute |
| Needle Bar Stroke | 33 mm |
| Feed System | Lower feed with drop feed mechanism |
| Automatic Functions | Thread trimming, back tacking (optional) |
| Needle Type | DP x 5 (135×17) / 134-35 |
| Bobbin Type | Horizontal rotating hook, pre-wound bobbins |
| Lubrication | Automatic oiling system |
| Safety Features | Safety clutch, needle guard, finger guard |
| Maintenance | Daily cleaning of hook area, oil reservoir inspection, periodic belt tension check |
| Spare Parts Available | Needles, bobbins, hook assembly, feed dogs, presser feet |
| Repairability | Modular design, parts widely available |
Frequently Asked Questions - AC-172N-1790AN JUKI
How do I thread the Juki AC-172N-1790AN?
Refer to the threading diagram on the machine. Typically, thread the upper thread through the tension discs, take-up lever, and needle eye. For the lower thread, wind the bobbin and insert it into the hook assembly following the arrow direction.
How to adjust thread tension?
Turn the tension dial on the front. For upper tension, tighten (clockwise) for tighter stitch. For bobbin tension, use the screw on the bobbin case. Test on scrap fabric.
How to change the needle?
Loosen the needle clamp screw with a screwdriver. Remove the old needle. Insert a new needle (Type DP x 5) with the flat side facing away from you. Tighten securely.
What type of oil should I use?
Use Juki Defrix Oil No. 1 or equivalent sewing machine oil. Fill the oil reservoir located on the arm, ensuring the level remains between the min and max marks.
How to clean the machine?
Turn off power. Remove the needle plate and hook cover. Use a soft brush to remove lint and dust from the feed dogs, hook, and tension areas. Oil after cleaning.
Why is my machine skipping stitches?
Check the needle: it may be bent, dull, or incorrectly inserted. Also ensure proper thread tension and that the hook timing is correct. Consult the manual for timing adjustment.
How to adjust the stitch length?
Turn the stitch length dial on the front of the machine. Rotate to desired value (usually 1-5 mm). The machine uses a stepped adjustment mechanism.
How to replace the bobbin case?
Open the hook cover. Remove the old bobbin case. Insert the new one with the bobbin winding facing up. Ensure it clicks into place. Test the tension.
What is the maximum fabric thickness?
This industrial machine can sew multiple layers of denim or canvas up to about 5 mm total thickness. Adjust presser foot pressure accordingly.
How to adjust presser foot pressure?
Locate the presser foot pressure regulator (usually on the top arm). Turn the knob clockwise to increase pressure for thick fabrics, counterclockwise for thin ones.
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USER MANUAL AC-172N-1790AN JUKI
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Product information
Brand : JUKI
Model : AC-172N-1790AN
Category : Sewing machine