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JACK® JK-Z7-29100 AI Smart Double Needle Adaptive Hump Heavy Duty Walking Foot Industrial Sewing Machine
The JACK® JK-Z7-29100 is an advanced double-needle industrial lockstitch sewing machine designed for professional sewing operations involving heavy, thick, and multilayered materials.
Equipped with intelligent Adaptive Hump-Jumping technology, dual-sensor control, and a triple-feed walking foot system, this machine is engineered to maintain consistent stitch formation when sewing across changing material thicknesses.
Its two-needle configuration produces two parallel rows of lockstitch sewing in a single operation, making it an excellent choice for upholstery, automotive interiors, leather products, furniture manufacturing, and industrial textile production.
The integrated direct-drive servo system, electronic touchscreen controls, automatic sewing functions, and smart thread management technology help improve sewing precision and production efficiency.
FULLY ASSEMBLED | TABLE, MOTOR & STAND INCLUDED
Professionally assembled, adjusted, and sewing-tested by JMJ Sewing Machines before delivery.
Key Features
- Double Needle Lockstitch System: Produces two parallel rows of durable lockstitch seams in a single sewing operation.
- AI Adaptive Hump-Jumping Technology: An intelligent adaptive system assists the machine when sewing over raised seams, material transitions, and multiple layers.
- Dual Thickness Sensors: Intelligent material detection helps the machine respond to changes in thickness during sewing operations.
- Triple Feed Walking Foot Mechanism: Combines bottom feed, needle feed, and alternating walking feet for synchronized movement of heavy materials.
- Smart Thread Management: The self-regulating control system coordinates stitch length and thread tension to support consistent sewing across different material thicknesses.
- Dual-Mode Control: Provides intelligent control of sewing performance and material feeding.
- Dual Alternating Walking Feet: Supports controlled feeding when working with heavy fabrics, leather, vinyl, and multilayered materials.
- Automatic Thread Trimming: Automatically trims sewing threads to reduce manual cutting operations.
- Automatic Backtacking: Provides automatic reverse stitching for seam reinforcement.
- Pneumatic Presser Foot Lifting: Supports automatic presser foot lifting using a compatible external compressed-air supply.
- Dual Stitch Length Function: Allows convenient selection between stitch length settings for different sewing operations.
- Touchscreen Control Panel: Provides access to electronic sewing functions and machine adjustments.
- Electronic Smart Handwheel: Allows controlled needle positioning and precise stitch adjustment.
- Large-Capacity Rotary Hook: The XXL hook design supports sewing applications requiring larger bobbin thread capacity.
- Intelligent Lubrication Control: Electronic oil regulation helps maintain proper lubrication of the rotary hook system.
- Low Bobbin Thread Detection: A photoelectric detection system provides an alert when the bobbin thread supply becomes low.
- Integrated Direct-Drive Servo Motor: Provides responsive electronic speed control for professional sewing operations.
Applications
The JACK® JK-Z7-29100 is recommended for professional production environments requiring two parallel stitching lines on heavy or multilayered materials.
- Automotive seats and interior upholstery
- Furniture and sofa manufacturing
- Leather bags and accessories
- Heavy-duty luggage and travel bags
- Marine upholstery and canvas products
- Mattress manufacturing
- Decorative double-needle topstitching
- Reinforced industrial seams
- Heavy fabric and multilayer textile assemblies
Professional Double-Needle Sewing Performance
The JACK Z7-29100 combines intelligent material detection, synchronized triple feeding, and double-needle stitching to help manufacturers achieve consistent seam appearance and controlled material handling in demanding production environments.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | JACK® |
| Model | JK-Z7-29100 |
| Machine Type | Industrial Heavy Duty Double Needle Walking Foot |
| Stitch Type | Double Needle Lockstitch |
| Number of Needles | 2 |
| Number of Threads | 4 |
| Feed Mechanism | Triple Feed / Compound Feed |
| Needle System | DPx35R |
| Standard Needle Size | #21 |
| Maximum Sewing Speed | 2,600 Stitches Per Minute |
| Maximum Stitch Length | 12 mm |
| Maximum Presser Foot Lift | 20 mm |
| Needle Gauge | 3/8 in. (9.5 mm), subject to supplied configuration |
| Rotary Hook | XXL Large-Capacity Hook |
| Hook Size | 32 mm |
| Motor Type | Integrated Direct-Drive AC Servo Motor |
| Rated Controller Power | 800 W |
| Rated Voltage | 110V |
| Frequency | 50/60 Hz |
| Control System | Electronic Touchscreen Control |
| AI Adaptive Hump System | Yes |
| Dual Thickness Sensors | Yes |
| Smart Thread Management | Yes |
| Automatic Thread Trimming | Yes |
| Automatic Backtacking | Yes |
| Automatic Presser Foot Lifting | Pneumatic |
| Electronic Handwheel | Yes |
| Bobbin Thread Detection | Yes |
| Lubrication | Electronically Controlled Hook Lubrication |
| Machine Dimensions | 930 × 385 × 780 mm (manufacturer catalog) |
| Net / Gross Weight | 66 / 81 kg (manufacturer catalog) |
| Machine Configuration | Complete with Table & Stand |
| Air Compressor | Required for pneumatic presser foot lifting; not included, sold separately |
Included with the Machine
- JACK® JK-Z7-29100 Double Needle Industrial Sewing Machine Head
- Integrated Direct-Drive Servo Motor
- Industrial Sewing Machine Table
- Heavy-Duty Metal Stand
- Integrated Electronic Control System
- Standard Accessories Supplied with the Machine
Complete Industrial Sewing Setup
Your machine is professionally assembled, adjusted, inspected, and prepared by JMJ Sewing Machines before delivery.
JMJ Quality Inspection
At JMJ Sewing Machines, we understand the importance of dependable equipment for professional sewing operations.
Before delivery, our quality inspection process includes, as applicable:
- Inspection for visible manufacturing defects
- Verification of machine operation
- Mechanical adjustments and calibration
- Inspection of relevant sewing components
- Verification of automatic sewing functions
- Needle and stitch formation inspection
- Sewing performance testing
- Preparation before shipping or delivery
Our objective is to provide customers with carefully inspected equipment that is properly prepared for professional sewing applications.
JMJ Sewing Machines Recommends
The JACK® JK-Z7-29100 is recommended for upholstery businesses, leather goods manufacturers, automotive interior specialists, and industrial sewing workshops that require double-needle stitching on heavy materials.
The intelligent Adaptive Hump-Jumping system is especially useful when sewing across changes in material thickness, such as overlapping seams and reinforced fabric assemblies.
JMJ Sewing Machines can assist customers in selecting suitable industrial sewing equipment according to their materials, production volume, thread requirements, and sewing applications.
Warranty & Technical Support
Warranty service and technical support are handled directly through JMJ Sewing Machines.
This industrial sewing machine includes a 12-month JMJ commercial warranty, subject to the applicable warranty terms and conditions.
For covered manufacturing defects, JMJ provides replacement parts and labor in accordance with its applicable commercial warranty.
Electrical and electronic components are subject to exclusions to the extent permitted by law.
Applicable manufacturer warranties and the purchaser's legal rights remain in effect.
Preliminary technical assistance may be available through video consultation. Certain technical evaluations or repairs may require an in-person inspection.
Spare Parts & Accessories
JMJ Sewing Machines can help customers identify suitable replacement parts and accessories for their industrial sewing equipment.
- Industrial sewing machine needles
- Bobbins and bobbin-related components
- Rotary hooks
- Walking foot presser feet
- Needle plates
- Feed dogs
- Thread tension components
- Mechanical replacement parts
- Electronic and electrical components
- Additional sewing accessories
All replacement parts and accessories are subject to compatibility verification and product availability.
Important Before Ordering
Machine Configuration: This industrial sewing machine is supplied complete with its table and metal stand.
Electrical Requirements: Rated Voltage: 110V.
Compressed Air Requirement: The pneumatic presser foot lifting system requires a compatible external air compressor for operation. The air compressor is not included and must be purchased separately.
Wheels: WHEELS ARE NOT INCLUDED — SOLD SEPARATELY.
Wheels shown in product photographs, when applicable, may be used for moving equipment within our showroom and are not included with the machine.
In-Store Purchases: Customers purchasing machines at our physical store receive a brief in-person explanation of basic machine controls at the time of delivery.
Shipped Orders: Shipped orders do not include in-person operator training.
Returns & Store Policies
Eligible voluntary returns may be requested within 14 calendar days, subject to JMJ Sewing Machines' applicable return conditions.
Approved voluntary returns are subject to a 20% restocking fee.
Returns involving covered defects or applicable consumer rights are handled according to the relevant warranty terms and laws.
Contact JMJ Sewing Machines
JMJ SEWING MACHINES
Industrial Sewing Machines, Spare Parts, Accessories, Repairs & Technical Support
Location: Orlando, Florida
English: 407-451-7450
Español: 321-374-2407
Website: jmjsewingmachines.com
Contact our team for assistance selecting the right industrial sewing machine for your business.