The Union Special Model 4000 is a light weight, hand-held, bag sewer. The Model 4000 is a single thread, 101 stitch, plain sew portable. It is ideal for sewing of open mouth: burlap, jute, paper, PE-material, PP laminated woven fabric and PP woven fabric bags.

An optional, suspended, top lock spring balancer can be used to support the Model 4000 while sewing.  To minimize machine damage and operator fatigue we recommend the Union Special 90191M suspension unit.

Check out Inpak’s full line of sewing thread for your portable sewing machine.


  • single thread plain sew
  • 101 stitch type
  • 3.5 SPI
  • 3/16” (12 plies of paper) capacity
  • 1600-1800 RPM
  • nibbler knife chain cutter
  • manual oiling
  • weight 12 lb.


  • 90191M Suspension Unit.


  • Air: NA
  • Electrical: 120/240 VAC, 50/60 Hz


To prevent downtime and costly emergency repairs, preventive maintenance (PM) services are available for your Model 4000. To ensure your Model 4000 operates at maximum efficiency, PMs can be arranged to fit your production schedule.


If you need a quick and cost effective repair of your Model 4000, just box it up and ship it to one of our repair facilities. Our experienced, manufacturer-trained, and certified technicians use genuine OEM replacement parts to ensure your Model 4000 is restored to its original factory operating specifications.