Jack Sewing Machines · Heavy Duty

Built for leather.
Built to last.

Six heavy-duty machines, led by the double-needle 58450J series, built to punch through leather, denim, canvas and multi-layer material that would stall a standard lockstitch head.

58450J Series 2002G 2030G 2060G H5-A H7
Double Needle · Flagship Heavy Duty

Two needles.
Perfect corners.

The 58450J series sews double-needle corners and right angles straight into denim, canvas and tent fabric in one pass, with straight-knife thread cutting that handles thin and thick thread alike and an auto corner-sewing cycle built into the head.

  • Double-needle stitching for right angles and corners on denim and tents
  • Straight-knife thread cutting adapts to thin 603 and thick 5000 thread
  • Auto corner sewing for consistent bag, jacket and outdoor-gear corners
  • Straight-stitch and corner-stitch variants across 11–22# needles
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Jack 58450J series double-needle heavy duty lockstitch machine
3000 spmMax speed
DPx5 11-22#Needle
Double needleConfiguration
Denim & tentsSuited for
JK-58420J-A
Straight stitch
JK-58450J-A
Corner stitch
JK-58720J-A
Large hook, straight stitch
JK-58750J-A
Large hook, corner stitch
More Heavy Duty Machines

Five more ways to sew heavy.

From compound feeding to super high-speed and multi-fabric flexibility, each head below is built for leather, sofas, car seats and other heavy material.

Jack JK-2002G heavy duty lockstitch machine
Heavy Duty Lockstitch
2002G
12mm stitch One-shaft design

Big stitch-length heavy-duty computerized lockstitch with a one-shaft transmission design, sewing tents, automotive supplies, non-woven bags and caps.

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Jack JK-2030G top and bottom feeding machine
Top & Bottom Feed
2030G
8-layer leather Sofa & car seat

Smooth bone-cross computerized top and bottom feeding machine with extensive operating room, built for sofas, car seats, luggage and canvas goods.

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Jack JK-2060G compound feeding lockstitch machine
Compound Feed
2060G
+25% efficiency 8-layer leather

Compound-feeding computerized lockstitch that lifts efficiency by 25%, built for sofa, car seat, luggage and canvas production.

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Jack H5-A super high speed top and bottom feeding machine
Top & Bottom Feed
H5-A
2200 spm Gloves & bags

Super high-speed computerized top and bottom feeding machine with a simple panel, in dedicated builds for gloves, bags and light material.

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Jack H7 multi-fabric heavy duty sewing machine
Multi-Fabric
H7
10.5Nm torque +9% efficiency

Flexible Alternation Technology spans a 1.3–5.5mm range with 10.5Nm integrated torque, wrinkle-free and bead-free across multiple fabric weights.

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