📌 Overview
Industrial long-arm two-needle filter bag sewing machine for reverse filter bags and large fiberglass bags
This long-arm two-needle cylinder-bed sewing machine is engineered for manufacturing Reverse Air Filter Bags and Large-Diameter Fiberglass Filter Bags.
The extended arm length provides a larger working area for tubular bag bodies, while the rotating cylinder-bed allows smooth and precise circular bottom closing.
The compound feed system ensures stable feeding on multi-layer, high-temperature industrial felts such as PPS, Aramid, PTFE, and Fiberglass.
Applications
• Reverse air filter bags
• Large-diameter fiberglass filter bags
• Ventiduct and insulation sleeves
• Circular bottom closing and reinforcement seams
✅ Key Features of the long-arm filter bag sewing machine
▌ Extended Long-Arm Workspace (850mm / 1270mm)
Provides additional maneuvering space for large and long filter bags, improving productivity and sewing stability.
▌ Two-Needle Parallel Lockstitch
Creates reinforced double seam lines required for airtight sealing and structural durability.
▌ Rotating Cylinder-Bed Design
Allows angle-adjusted sewing access to bag bottoms and circular closures with reduced fabric distortion.
▌ Compound Feed Mechanism
The needle, presser foot, and feed dog move in synchronization to ensure smooth feeding on multi-layer felts.
▌ Large Vertical Japanese Rotary Hook
The machine is equipped with a Japanese KABAN large vertical rotary hook, which is the key to stable sewing performance. It ensures smooth thread control on PPS, Aramid, PTFE and fiberglass felts, preventing skipped stitches, thread breakage, and rework during long production shifts.
Rotary Hook System Comparison
| Item | Standard Rotary Hook | Japanese KABAN Large Vertical Rotary Hook |
| Precision & Wear Stability | Precision decreases after extended use, hook path may shift | High-precision ground hook path maintains long-term stability and alignment |
| Thread Compatibility | Sensitive to high-tenacity PPS / PTFE / Aramid thread, may cause friction or skipped stitches | Designed for high-strength filter bag thread, ensures smooth and stable tension control |
| Continuous Sewing Performance | Heat buildup during continuous operation can lead to thread fraying or breakage | Low heat generation and low friction maintain stable sewing during multi-shift production |
| Reliability in Industrial Production | Requires frequent tension adjustments and occasional re-stitching | Very low failure rate, supports uninterrupted sewing and consistent seam quality |
| Service Life | Typically replaced every 6–12 months | 2–4 years of stable performance under industrial workload |
Explanation
In filter bag production, real productivity is determined not by maximum sewing speed, but by whether the machine can run continuously without skipped stitches or thread breakage.
The Japanese KABAN large vertical rotary hook is the key reliability component that enables stable, long-duration sewing.
⚙️ Workflow Efficiency and Operator Assist Functions
• Energy-efficient servo motor
• Auto needle positioning
• Auto backtacking reinforcement
• Auto presser foot lift
These functions reduce operator fatigue and support continuous multi-shift production.
Available Models & Technical Specifications
| Model | GC2281-1D | GC2281-1F |
| Max Sewing speed | 1200 R.P.M | 1200 R.P.M |
| Stitch length | 0-6mm | 0-6mm |
| Needle bar stroke | 34mm | 34mm |
| Presser foot | Alternating Walking | Alternating Walking |
| Feed Dog | Twin rows | Twin rows |
| Needle size | DP×17 23# | DP×17 23# |
| Needle gauge | Standard 6.4mm | Standard 6.4mm |
| Rotating hook | Large vertical hook | Large vertical hook |
| Bed in diameter /length | 90mm/850mm | 102mm/1350mm |
| Working size | 850×110mm | 1270×110mm |
| Motor | Servo motor | Servo motor |
| Lubrication | Manual | Manual |
| Auto Needle Positioning, Auto Back Tracking, and Auto Foot Lift | ||
🔍 Why Choose This Long Arm Filter Bag Sewing Mahcine
This KABORY long-arm two-needle machine is not a modified general-purpose sewing machine — it is purpose-built for the demanding production of industrial filter bags.
You’ll benefit from:
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Industrial-grade durability for multi-shift, heavy-duty operation.
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Premium Japanese componentry and cast-iron construction for long life and minimal downtime.
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Precision engineering tailored to bottom-closing, tubular & reinforcement-seam structures typical in reverse filter bags and ventiducts.
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Reduced defects and rework thanks to consistent feeding and robust seam formation.