ACF-172-1790 - Sewing machine JUKI - Free user manual and instructions
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| Product Type | Industrial single-needle lockstitch sewing machine |
| Brand | JUKI |
| Model | ACF-172-1790 |
| Category | Heavy-duty sewing machine |
| Intended Use | Apparel manufacturing, auto upholstery, leather goods |
| Dimensions (Machine Head) | Approx. 520 × 250 × 380 mm |
| Weight (Machine Head) | Approx. 35 kg (77 lbs) |
| Power Supply | 220-240V AC, 50/60Hz |
| Power Consumption | 550W (Maximum) |
| Motor Type | Energy-saving servo motor |
| Max Stitching Speed | 5,500 stitches per minute |
| Stitch Length | 0.5 - 5.0 mm (adjustable) |
| Needle Type | DB ×1 (size 7# - 18#) |
| Thread Trim | Automatic thread trimmer |
| Lubrication | Semi-automatic oiling system |
| Safety Features | Finger guard, presser foot safety switch, emergency stop |
| Maintenance | Regular cleaning and oiling required |
| Cleaning | Remove lint and dust with soft brush; wipe with dry cloth |
| Parts Availability | Replaceable parts widely available |
| Repairability | Modular design for easy servicing |
| Manual Language | English |
| Manual Pages | Quick reference guide, 1 page |
Frequently Asked Questions - ACF-172-1790 JUKI
How do I thread the JUKI ACF-172-1790 sewing machine?
First, raise thepresser foot to release tension. Place the thread spool on the pin, pull the thread through theupper thread guide, down between thetension discs, and up through thetake-up lever. Continue down to the needle bar, then thread the needle from front to back. For the bobbin, wind it in thebobbin winder and insert the case, pulling the thread through the slot.
What type of needle does the JUKI ACF-172-1790 use?
This machine usesDB ×1 industrial needles. For standard medium-weight fabrics, a size 14 (90) is recommended. For heavier fabrics, use sizes 16 (100) or 18 (110). Always check the needle for sharpness and straightness before each use.
How do I adjust the thread tension on this machine?
theupper thread tension is controlled by a knurled dial on the front. Turn it clockwise to tighten (increase tension) or counterclockwise to loosen. Thebobbin tension is adjusted via a screw on the bobbin case. Test on a scrap fabric until thestitch formation is balanced, with no loops on either side.
How do I wind the bobbin on the ACF-172-1790?
Place the empty bobbin on thebobbin winder spindle at the top right. Pass the thread from the spool through thetension post and wrap a few turns around the bobbin by hand. Push the winder lever to engage, then press thefoot pedal or start button. The winder will stop automatically when full.
What oil should I use for this JUKI machine and how often?
Use a high-qualitysewing machine oil (e.g., JUKI's recommended oil or a clipper-style lubricant). Apply 2-3 drops daily to the hook mechanism, needle bar, and other moving parts as shown in the manual. Over-oiling can cause stains; wipe excess after application.
Why is my JUKI ACF-172-1790 skipping stitches?
Skipping stitches often occurs due to abent needle, incorrect needle size, or theneedle not inserted fully. Also check thetiming between needle and hook, and ensure the thread is properly seated in thetension discs. Replace the needle and re-thread first, then test again.
How do I set the stitch length?
Thestitch length dial is located on the front of the machine. Turn it to select a value from 0.5 to 5.0 mm. Higher numbers produce longer stitches. For basting or gathering, use a longer stitch; for fine seams, use a shorter stitch.
How do I clean the machine properly?
Turn off the machine and unplug it. Remove theneedle plate and shuttle hook assembly. Use asoft brush to remove lint and loose threads from the feed dogs, hook area, and lower parts. Wipe the exterior with a dry cloth. Avoid using compressed air, as it can push debris deeper.
How do I replace the needle on the ACF-172-1790?
Loosen theneedle clamp screw with a small screwdriver. Remove the old needle and insert the new one with theflat side facing away from the operator (usually to the back). Push it up as far as it will go, then tighten the screw securely. Test with a piece of fabric.
How do I use the automatic thread trimmer?
Ensure the machine is properly threaded and the bobbin is wound. Position the fabric under the needle, sew your seam, then press theauto-trim button or use the foot pedal function. The machine will trim both upper and lower threads automatically, leaving a neat tail for the next seam.
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USER MANUAL ACF-172-1790 JUKI
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Product information
Brand : JUKI
Model : ACF-172-1790
Category : Sewing machine