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SPEEDWAY SW35800DNU 3 Needle Feed of the Arm Chainstitch For Jeans with Differential Industrial Sewing Machine Assembled with Servo Motor, Table and Stand Included
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Specifications
- Stitch type
- Chainstitch
- Feed
- Drop Feed, Puller
- Construction
- Feed off the Arm
- Features
- Automatic Lubrication
- Best for
- Denim / Jeans, Canvas, Awnings
Description
3-needle feed-of-the-arm chainstitch — the specialty machine for jean inseams. Curved arm + differential feed + chainstitch elasticity, all tuned for closed-leg denim assembly.
Who runs this
Denim factories doing inseam construction on jeans and heavy workwear pants. The feed-of-arm configuration is purpose-built for curved tubular seams that flat machines can't reach.
If you're running outseams (straight, accessible), the SW-845 split-bar handles those. If you're running inseams (curved, tubular, has to wrap an arm), this is the machine.
Why feed-of-arm on inseams
- Curved arm fits the leg. The tubular leg slips over the cylindrical arm; operator rotates the leg around it. Flat-bed alternatives need the leg cut open and re-sewn after.
- Differential feed. Top and bottom feed dogs run at different speeds — handles ease and gathering on curved seams without operator manipulation.
- 3-needle chainstitch elasticity. Three parallel chainstitch rows. Stretches with the fabric (denim shrinks/expands through wash cycles); lockstitch alternatives crack.
Application examples
Jean inseam
Crotch-to-ankle inseam with felled-seam construction. Three parallel chainstitch rows; arm wraps the leg through the curve.
Workwear pant inseam
Heavy twill workwear inseam construction. Same feed-of-arm pattern as denim, with the elasticity needed for industrial laundry tolerance.
Coverall leg
Bib coverall pant section inseam. Tubular leg, curved seam line, elastic chainstitch — all the requirements.
What ships with it
Machine assembled with feed-of-arm cylinder, differential feed system, industrial table and stand.
