51700F - Sewing machine Union Special - Free user manual and instructions
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| Product Type | Industrial Sewing Machine |
| Brand | Union Special |
| Model | 51700F |
| Category | Sewing Machine |
| Dimensions (approx) | 600 mm x 300 mm x 450 mm |
| Weight (approx) | 35 kg |
| Power Supply | 110-220V AC, 50/60 Hz |
| Motor Power | 550 W |
| Max Sewing Speed | 4500 stitches/min |
| Stitch Length | 1-5 mm |
| Needle System | UY155GAS |
| Thread Take-up | Standard lever |
| Feed Mechanism | Drop feed with needle feed |
| Lubrication | Automatic oil system |
| Built-in Light | Yes |
| Foot Pedal | Included |
| Main Functions | Straight stitch, zigzag, overedge, hemming, seaming |
| Maintenance | Clean lint, oil regularly, replace needles |
| Safety | Finger guard, stop motion |
| Spare Parts | Needles, bobbins, presser feet, loopers |
Frequently Asked Questions - 51700F Union Special
What type of oil should I use for the Union Special 51700F?
Use sewing machine oil specifically for industrial machines. Avoid vegetable or motor oil.
How do I adjust the stitch length?
Turn the stitch length dial on the front of the machine. Typical range is 1 to 5 mm.
Why does the thread keep breaking?
Check needle condition, thread tension, and ensure the thread path is correct. Use quality thread.
How to clean the machine?
Remove lint and dust with a soft brush or compressed air. Do not use water.
What needle size is recommended?
Use UY155GAS needles sizes 14-18 for heavy fabrics. Check manual for specifics.
Does the machine come with a table?
No, the machine is typically head only. A separate industrial table is required.
How to change the needle?
Loosen the needle clamp screw, remove old needle, insert new with flat side facing left, tighten firmly.
What is the maximum fabric thickness it can sew?
It can sew multiple layers of denim or canvas up to 6 mm total thickness.
How often should I oil the machine?
Oil daily before use, especially the hook and needle bar areas. Use a few drops.
Where can I find spare parts?
Contact Union Special dealers or online industrial sewing parts suppliers.
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USER MANUAL 51700F Union Special
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Product information
Brand : Union Special
Model : 51700F
Category : Sewing machine