Sewing Machines
Double Needle Unison Feed Walking Foot Machine
Model SW-4420N
Walking footLockstitchServo
Free shippingFinancing available
$2,398
1 / 12Sewing Machines
SPEEDWAY SW 845 – Double Needle Split Bar Needle Feed Lockstitch Machine – Complete Setup, Table & Stand Included
$1,965
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Specifications
- Stitch type
- Lockstitch
- Feed
- Needle Feed
- Construction
- Flatbed
- Features
- Needle Positioner, Automatic Lubrication
- Best for
- Lightweight Apparel, Denim / Jeans
Description
Double-needle split-bar lockstitch for denim, jeans, and the heavy-fabric production work where each needle has to operate independently to clear the cross-seam.
Who runs this
Denim factories building jeans — outseam, inseam, yoke, back-pocket attach. Workwear shops on heavy bib overalls and coveralls. Anywhere two parallel rows of stitching cross over thick existing seams and you need both needles to keep stitching cleanly through the bump.
Why split bar over fixed double needle
- Independent needle operation. Each needle runs on its own bar. Hits a thick cross-seam, the affected needle disengages, the other keeps stitching. No needle break, no broken thread, no stop.
- Built for the cross-seam problem. Fixed double-needle machines fight cross-seams; that's where 80% of denim machine breakage happens. Split bar is the engineering answer.
- Needle-feed lockstitch. Needle feed plus bottom feed keeps thick layers aligned through the seam. No slippage, no skipped stitches on the seam-allowance bumps.
Application examples
Jean inseam
Two parallel rows running from crotch to ankle, crossing the waistband seam at the top. Split bar keeps stitching through the waistband bump where a fixed double would skip.
Coverall back yoke
Yoke seam attaching upper back to lower coverall body. Crosses the shoulder seam reinforcement. Split bar handles the layer change without breakage.
Pocket attach
Back-pocket double-row attachment on heavy denim. Pocket-corner bartacks are where lighter machines fail; this one runs through them.
What ships with it
Machine head assembled, industrial table and stand, 550W servo motor and controller, needles, bobbins, standard accessories kit, machine oil.
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Double Needle Heavy Duty Unison Feed Walking Foot
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Free shippingFinancing available$3,186$3,847