What is the difference between Line 3, Line 4, and Line 5?

Line 3 handles coil feeding, leveling, beading, notching, and shearing — folding is done on a separate machine. Line 4 adds automatic folding. Line 5 is fully automatic from coil to finished duct including seam closing, with U-shape or linear layout options. Higher line numbers mean more automation and less manual intervention.

How much floor space do I need?

A Line 3 requires approximately 8m × 4m. A Line 5 U-shape needs about 12m × 8m. The linear Line 5 requires 18m × 4m. We provide detailed layout drawings with every order to help you plan your factory floor.

Can the line produce different duct sizes automatically?

Yes. The PLC stores up to 1000 duct programs. You can batch-produce multiple sizes in one run — the line automatically adjusts notching, cutting length, and folding dimensions for each size without stopping.

What thickness and width of coil does it handle?

Standard models process 0.5-1.2mm galvanized steel with coil widths from 1250mm to 1500mm. Heavy-duty versions can handle up to 1.5mm. Custom widths are available on request.

How long does installation and commissioning take?

Installation typically takes 3-5 days with our technician on site. Operator training takes an additional 2-3 days. Most customers are in full production within one week of delivery.

Can I upgrade from Line 3 to Line 5 later?

Yes, our modular design allows field upgrades. You can add the automatic folding unit and seam closer to a Line 3 to convert it to Line 5 functionality. This is a popular option for shops that want to start smaller and scale as demand grows.

Straight Auto Duct Line 5 AML-5 - detailed view

Auto Duct Lines

Straight Auto Duct Line 5 AML-5

Last updated: October 12, 2026

$72,000

Straight-line auto duct line 5 (AML-5) with inline processing for high-volume rectangular duct manufacturing. Linear I-type floor plan offers easier material flow and maximum throughput.

Technical Specifications

ModelsAML-5-1300 / 1500 / 1600

Material Thickness0.45-1.5mm

Max Width1300 / 1500 / 1600mm

Working Speed18 m/min

Coil Weight7 T

Total Power38-40 kW

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What is a Straight Auto Duct Line 5 AML-5?

An auto duct line is a fully automated production line that manufactures rectangular HVAC ducts from raw metal coil to finished ductwork in a single continuous process. The line integrates decoiling, leveling, beading, notching, punching, folding, and seam closing operations, reducing labor requirements by 70% compared to manual fabrication. Auto duct lines are categorized by automation level: Line 2 (basic), Line 3 (mid), Line 4/5 (fully automatic with auto stacking).

Key Features

Linear I-type floor plan for optimal material flow
Integrated TDF flange forming
Automatic measuring and cutting
Servo-driven precision feeding
Remote diagnostics support
High-volume continuous production

Still Losing Money to Manual Rectangular Duct Production?

Every HVAC duct shop faces the same bottleneck: handling sheets between multiple machines. When your team spends hours on manual measuring, cutting, and folding, your production capacity drops, labor costs rise, and deadlines slip. The Straight Auto Duct Line 5 AML-5 is engineered to eliminate these inefficiencies — automating straight auto duct line 5 while delivering consistent, factory-grade quality.

In this guide, we break down exactly how this machine transforms your AML-5 linear duct line workflow, what specifications matter for your operation, and how to calculate your return on investment. Whether you run a 3-person job shop or a 50-employee production facility, understanding these details directly impacts your bottom line.

How It Transforms Your Production Line

The Straight Auto Duct Line 5 AML-5 operates on a proven principle: straight auto duct line 5 should be a continuous, automated process — not a series of manual interventions. Here is the step-by-step workflow that makes this possible:

Coil Loading & Uncoiling

Steel coil is loaded onto the hydraulic decoiler, which automatically feeds material into the line under controlled tension — eliminating the need for manual sheet handling.

Leveling & Beading

The strip passes through precision leveling rollers to remove coil curvature, then through beading stations that press 5-7 reinforcement ribs into the panel for structural rigidity.

Notching & Punching

Hydraulic notching punches cut corner notches and punch holes for TDF flange corners, all positioned by CNC with ±0.3mm accuracy.

Shearing to Length

A hydraulic shear cuts the panel to exact programmed length based on the duct dimensions entered in the PLC.

Folding & Seam Closing

The panel is automatically folded into L-shape, U-shape, or complete rectangular form, then the Pittsburgh lock seam is closed to create a rigid, airtight duct section.

Technical Specifications & Performance Data

Every specification on this machine is chosen for a reason. The table below shows not just the numbers, but what each one means for your daily production:

Parameter	This Machine	What It Means for You
Control System	PLC with touchscreen	Easy programming, consistent results, minimal training
Construction	Heavy-duty steel frame	Vibration-free operation, 10+ year service life
Certification	CE certified	Meets European safety and quality standards
Warranty	2 years	Peace of mind with comprehensive factory warranty

Problems Solved: Before vs. After

We asked 50+ HVAC fabricators about their biggest production headaches. Here is how this machine directly addresses each one:

Without This Machine	With This Machine
✕ Multiple machines, multiple operators Need 4-6 workers across separate machines, high labor cost	✓ One continuous line, 1-2 operators Cut labor costs by 60-70%
✕ Inconsistent duct dimensions Ducts don't align on site, assembly delays	✓ CNC-controlled ±0.3mm accuracy throughout Every duct is identical, perfect fit on site
✕ Slow production speed Max 100-150m²/day with manual methods	✓ Continuous production up to 1000m²/day Take on larger projects, meet tight deadlines
✕ High material waste 8-12% scrap from manual cutting errors	✓ Optimized nesting and CNC cutting Scrap reduced to 2-3%, thousands saved monthly
✕ Safety hazards from manual handling Risk of cuts, strains, and accidents	✓ Fully automated material handling Safer workplace, lower insurance costs

Where It Fits in Your Factory

This machine is versatile enough to serve multiple production scenarios. Here are the most common configurations our customers use:

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Large Commercial Projects

High-rise buildings, airports, convention centers where thousands of square meters of rectangular duct are required.

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Duct Manufacturing Plants

Production facilities supplying ductwork to multiple contractors — the auto line is the core profit center.

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Mechanical Contractors

Large HVAC contractors with in-house fabrication shops serving their own installation teams.

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Modular Construction

Prefabrication of duct sections for modular building projects where precision and consistency are critical.

Frequently Asked Questions

Click each question to see the answer. These are the questions our sales engineers hear most often:

Preda Care

After-Sales That Never Expires

We know what keeps you up at night: "What if the machine breaks down and nobody helps me?" With Preda Care, that fear is gone. We stand behind every machine — not just for the warranty period, but for the entire lifecycle of your equipment. Years from now, when you need a spare part or technical advice, we will still be here.

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Global Agent Network

Local service partners in 30+ countries. Get on-site support in your time zone, in your language. No waiting for a technician to fly in from China.

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Free Spare Parts Shipping

Wear parts fail — it is normal. We ship replacement parts worldwide by express courier, free of charge during warranty. Even after warranty, parts are at factory cost with fast shipping.

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Remote PLC Diagnostics

PLC or program issue? Our engineers connect directly to your machine via secure remote access. Most software problems are resolved within 2 hours — no service call, no downtime waiting.

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24-Hour Response Guarantee

WhatsApp, WeChat, or email — our technical team responds within 24 hours, every day of the year. Urgent issues get priority attention. You are never left waiting.

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Lifetime Technical Support

Warranty expires — our support does not. Need advice on maintenance, troubleshooting, or upgrades 5 or 10 years from now? We are still just a message away.

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Free Operator Training

Every machine includes comprehensive video training, operation manuals, and remote setup assistance. New operators? We train them too — at no extra cost, anytime.

Talk to Our Support Team → WhatsApp/WeChat: +86-18355321923 | jason@predamachine.com

Professional Packaging & Global Shipping

Every machine is professionally packaged and secured in a container for safe delivery to your port. We send you loading photos before the ship sails.

Overhead crane lifting machine for loading

Securing machine inside shipping container

✓ Wooden crate packaging ✓ Stretch film wrapping ✓ Container reinforcement ✓ Loading photos provided

Calculate Your Return on Investment

Based on average industry data, here is what a typical customer saves after installing this machine:

60-70%

Labor Cost Reduction

5-8x

Output Increase

8-14 months

Typical Payback Period

6-9%

Material Waste Reduction

* Figures based on average customer data for a shop producing 2000-5000m² of duct per month. Your actual results will vary based on production volume, labor rates, and current efficiency levels. Contact our engineers for a customized ROI calculation based on your specific operation.