4120i-511

The proven machine-construction delivers a reliable performance in all variations.

Main features of these machines are the automatic pressure-free lubrication, the double needle-thread tension, the manual back-tacking via lever, a large vertical two-piece-hook without bobbin case, safety clutch as standard, exchangeable needle plate inserts and wheel feeders and an adjustment scale at the hand-wheel.

 

Unique is that this machines have a full synchronization of the feed dog and the top driven roller even during back-tacking. Stitch in stitch back-tacking provides highest seam quality and avoid material perforation.  

 

Technical parameters:

Stitch type: 301 (Lockstitch)

Sewing speed: max. 3.000 rpm

Stitch length: max. 7mm

Presser-foot height: max. 12,5mm

Needle bar stroke: 40mm

Material thickness: max: 6mm

Needle size: NM60 – NM 180 (in 1/100mm)

Thread size: 80/3 – 10/ 3 (synth)

Roller presser diam.: 35mm (25 or 45mm optional)

Optional: roller presser in 25 or 35mm plain or rubber coated

 

All techn. specifications are related to the used sewing equipment and materials.