35800BWDNG - Sewing machine Union Special - Free user manual and instructions
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| Product Type | Industrial Bag Closing Sewing Machine |
| Brand | Union Special |
| Model | 35800BWDNG |
| Intended Use | Closing woven bags, paper bags, and heavy-duty packaging |
| Thread Type | Single thread (high-strength nylon or polyester) |
| Stitch Type | Single Thread Chain Stitch (101) |
| Sewing Speed | Up to 5,500 stitches per minute (adjustable) |
| Stitch Length | Adjustable (typically 2-4 mm) |
| Needle System | Heavy-duty needle (standard bag closing system) |
| Thread Trimmer | Automatic thread trimmer for clean cutoffs |
| Weight | Approximately 8 kg (head unit) |
| Portability | Portable with built-in handle and optional mounting bracket |
| Power Supply | AC motor, 110V/220V (depending on version) |
| Lubrication | Automatic lubrication system for high-speed operation |
| Construction | Heavy-duty cast aluminum body |
| Operation | Simple operation with minimal training required |
| Maintenance | Regular cleaning and oiling required |
| Safety | Safety guard and stable base included |
| Spare Parts | Readily available needles, feed arms, and loops |
| Compatibility | Works with pre-formed bags or continuous roll |
Frequently Asked Questions - 35800BWDNG Union Special
What type of thread is recommended for the Union Special 35800BWDNG?
Use high-strength, synthetic thread such as nylon or polyester with a size range of 20/3 to 12/3. The machine is designed for single-thread chain stitching, so a large cone (1-5 lb) is recommended for prolonged operation.
How do I thread the Union Special 35800BWDNG?
First, place the thread cone on the pin and feed the thread through the tension disc, then around the pull-off. Next, thread the needle from the side of the needle eye away from the take-up lever. Always refer to the threading diagram on the machine or manual for precise routing.
How can I adjust the stitch length?
Locate the stitch length adjustment knob or lever on the side of the head. Loosen the knob, slide it to the desired setting (usually marked from 2 to 4 mm), then retighten. Test on a scrap piece of bag material to confirm.
What maintenance is required after each shift?
After every 8 hours of use, clean lint and dust from the feed dog, needle area, and looper. Apply a few drops of high-quality sewing machine oil to the designated oiling points. Periodically check the auto-lubrication reservoir and fill as needed.
Can I sew filled bags with this machine?
Yes, the 35800BWDNG is specifically designed for closing pre-filled bags. Use the optional bag closer suspension unit to allow the machine to move freely along the bag opening.
What size needle does the 35800BWDNG use?
It uses a standard bag closer needle system, typically size DC1 or 16x257. Choose needle size 16x257-20 for medium-weight woven polypropylene and larger needles for heavier materials. Ensure the needle is correctly inserted with the long groove facing the looper.
How do I clean the sewing machine?
Keep the machine clean by using a soft brush or compressed air to remove dust and thread bits from the bobbin area, feed dog, and stitch plate. Do not use aggressive solvents. Wipe the exterior with a damp cloth and re-oil after cleaning.
Is the machine suitable for sewing very thick fabrics?
Yes, the 35800BWDNG features a powerful motor and a robust feed system that can handle multi-wall paper bags, jute, and heavy woven polypropylene. For different material thicknesses, adjust the presser foot pressure and needle size accordingly.
Where can I find spare parts for the 35800BWDNG?
Union Special offers a comprehensive spare parts network. You can contact an authorized dealer or purchase online through industrial sewing machine parts suppliers. Common parts like needles, feet, and tension discs are widely available.
What should I do if the machine skips stitches?
Skipped stitches usually indicate a blunt needle, incorrect threading, or low looper timing. First, replace the needle. Check that the thread is correctly seated in the tension disc and that the needle is the correct type. If the issue persists, inspect the looper for burrs and adjust its timing according to the manual.
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USER MANUAL 35800BWDNG Union Special
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Product information
Brand : Union Special
Model : 35800BWDNG
Category : Sewing machine