The Stangroup HVAC Spiral Duct Collar Making Machine is a compact, high-efficiency industrial roll former engineered to automate the production of precision round start collars, take-offs, and connector sleeves for spiral ductwork. By integrating automated mechanical notching, stiffness-enhancing bead rolling, and concentric male end-crimping into a single continuous pass, this heavy-duty machine eliminates time-consuming manual bench operations, delivering airtight, SMACNA-compliant duct connections at rapid cycle times.
Technical Specifications
| Technical Parameter | Specification / Value |
|---|---|
| Collar Diameter Range | Ø 80 mm – Ø 350 mm (approx. 3" to 14") |
| Material Thickness Capacity | 0.4 mm – 0.7 mm (28 – 24 Gauge Sheet Metal) |
| Coil Strip Width | 150 mm (Standard input width) |
| Forming & Production Cycle | High-speed continuous profiling (10-15 seconds per standard collar) |
| Integrated Tooling Stations | Notching Die, Beading Rollers, Tapered End-Crimper |
| Drive Motor Power | 1.5 kW High-Torque Industrial Gear Motor |
| Power Supply Configuration | 220V/480V, 3-Phase, 60Hz (Custom North American grids) |
| Machine Net Weight | Approx. 200 kg (440 lbs) — Rigid, compact workshop footprint |
Automated Multi-Stage Forming Process
Unlike traditional methods that require separate machines for each step, the Stangroup Collar Maker processes flat metal strip stock into a finished round take-off sleeve in a single automated operation:
- Precision Notch Punching: Automatically stamps accurate positioning notches for the lock or mechanical fastening tabs.
- Rigid Bead Rolling: Forms an automated circumferential bead profile that acts as a structural pipe stop and enhances overall duct joint rigidity.
- Tapered End-Crimping: Applies a consistent mechanical crimp to the male end, ensuring easy, slip-fit insertion into the spiral pipe sleeve on the job site.
- Curvature Roll-Forming: Gently rolls the profiled strip into a perfectly round cylinder matching the targeted diameter setup.
Key B2B Manufacturing Advantages
- Elimination of Manual Bench Work: Consolidates four separate sheet metal fabrication processes into a one-man workstation, significantly lowering labor costs per part.
- Perfect Concentricity & Seamless Fit: Delivers tight-tolerance diameter control, minimizing air leakage and gaps during final rivet or self-tapping screw assembly.
- Heavy-Duty Hardened Tooling: The forming rollers and punching dies are machined from premium alloy steel and heat-treated to resist wear when processing tough galvanized sheets.
- Quick-Diameter Calibrations: Features an intuitive, manual adjustment mechanism that allows operators to re-tool and dial in new diameter dimensions within minutes.
Frequently Asked Questions
Does this machine support the electrical grid standards of the USA and Canada?
Yes. While standard configurations ship with international settings, Stangroup custom-builds the electrical control enclosures for the North American market, wiring the 1.5 kW motor for 3-Phase 220V or 480V at 60Hz to ensure immediate plug-and-play installation in your shop.
What types of metal can the Spiral Duct Collar Machine process?
The machine is optimized for standard galvanized steel from 28 to 24 Gauge (0.4–0.7 mm). It can also comfortably roll-form soft aluminum strip stock and light-gauge stainless steel sheets, provided proper lubrication is applied to protect the tooling dies.
How does this machine help pass SMACNA airtightness inspections?
Manual collars often suffer from uneven crimping and out-of-round warping, causing major air leakage. The Stangroup collar machine guarantees an exact, uniform circumference and an identical bead depth across every batch, ensuring your round take-offs create a tight, code-compliant seal when mated with standard spiral ducts.
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