Multi-function Pittsburgh Lock Forming Machine for HVAC Duct Sheet Metal
Versatile 6-in-1 / 7-Station Forming: Forms essential HVAC duct joints including Pittsburgh lock (union shape), single hem (right-angle / standing seam), drive cleat (C-cleat), double seam, and elbow curve locks.
Robust Working Capacity: Handles sheet metal from 0.5 mm up to 1.2 mm (SA-12HB) and up to 1.5 mm galvanized steel or 1.0 mm stainless steel (SA-15HB).
High-Wear Tooling & Drive: Built with an all-steel forming head, vacuum-quenched GCr15 / 45# precision forming rollers, 20CrMnTi hardened gears, and 40Cr quenched roller shafts.
Flexible Power Compatibility: Standard 380V/50Hz/3Ph with customizable single-phase 220V/50Hz or 420V options, mounted on heavy-duty swivel casters for easy workshop mobility.
Overview & Duct Seam Forming
The Multi-Function Pittsburgh Lock Forming Machine is an essential, foundational sheet metal shaping tool for HVAC duct fabrication facilities. Engineered for fast, accurate lock rolling, it produces tight, airtight seam joints required in square and rectangular ventilation ductwork assembly.
Manufactured with an all-steel forming head, precision-ground shafts, and hardened alloy components, this roll former delivers long-term dimensional repeatability, smooth sheet feeding, and minimal machine vibration.
Workstations & Formable Lock Types
Equipped with up to 7 dedicated forming stations to accommodate standard sheet metal ducting requirements:
- Pittsburgh Lock (Union Shape): Primary joint seam for rectangular air duct corner locking.
- Single / Right-Angle Hem (Orthogonal Shape): Single edge flange inserted into the female pocket.
- Drive Cleat (C-Cleat / Lock Pin): Forms flat connecting cleats for longitudinal duct joints.
- Double Seam / Z-Shape & U-Shape: Specialized profiles for transitions, fittings, and rigid joints.
- Round Elbow Flanging Attachment: Curved arc shaping station for round duct elbows and fittings.
Technical Parameters
| Model | Max. Sheet Thickness | Motor Power | Weight | Dimensions (L×W×H) |
|---|---|---|---|---|
| SA-12HB | 1.2 mm (18 Ga) Galvanized Steel | 1.5 kW | 290 kg | 1070 × 570 × 1000 mm |
| SA-15HB | 1.5 mm (16 Ga) Galv. / 1.0 mm (20 Ga) S.S. | 3.0 kW | 290 kg | 1100 × 600 × 1000 mm |
| Standard Voltage | 380V / 50Hz / 3-Phase (Customizable: 220V/50Hz/1Ph or 420V/50Hz/3Ph) | |||
| Roller Material | SA-12HB: 45# High-Grade Steel | SA-15HB: GCr15 Bearing Steel (Vacuum Quenched) | |||
Component Specifications & Material Quality
| Mechanical Component | Specification & Material Standard |
|---|---|
| Drive Motor | Nanjing Wolong industrial motor (high torque, thermal protection) |
| Bearings | HRB (Harbin) precision needle and roller bearings |
| Roller Shafts | 40Cr alloy structural steel, high-temperature quenched & tempered |
| Drive Gears | 20CrMnTi carburized & vacuum-quenched for high tooth strength |
| Forming Rollers | GCr15 bearing steel / 45# tool steel, CNC precision-ground & heat-treated |
Technical Specifications & Seam Chart
Forming Stations, Seam Shapes & Parameter Specifications
Head Tooling & Mechanical Assembly Details
Infeed Guides & Head Rollers
Multi-Station Progressive Rollers
Heavy-Duty Roller Shaft Bank
Factory Workshop & Equipment Views
Grey Model Side Profile
Rear Frame & Power Switch
Front Table & Infeed Plate
Blue Model Top-Down View
Side Mobility Casters & Body Frame
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