01
Multi-function Lock Former
For rectangular duct seams and additional edge profiles with the specified roller tooling.
Confirm every required profile and roller set.
View Machine →HVAC DUCTWORK · BUYING GUIDE
Which Lock Forming Machine Do You Need?
Start with your duct shape and seam connection. Match the profile, material and sheet thickness to the right machine.
01 Rectangular duct seam
02 S-cleat connection
03 Snap-lock corner
04 Duct elbow seamYour finished connection comes first. Profile illustrations and supplied workpieces are references; confirm the required geometry.
Choose by the Connection You Need
Four machine types. Different seams and tooling.
02
S Lock Forming Machine
For S-cleat profiles used with compatible sheet-metal duct connections.
Match the cleat dimensions and mating parts.
View Machine →03
Snap Lock Forming Machine
For formed edges used in compatible snap-lock corner connections.
Approve both mating edges and the final corner.
View Machine →04
Elbow Lock Forming Machine
For seam edges on compatible curved duct elbow segments and fittings.
Confirm the seam and finished elbow geometry.
View Machine →The multi-function option links to our Pittsburgh lock former range. Supported profiles vary by model and roller configuration.
Before You Choose, Confirm These 4 Details
01
Finished duct & seam
Send the duct shape, connection type and required profile drawing.
02
Material & grade
Specify galvanized steel, stainless steel or another actual material and grade.
03
Minimum / maximum thickness
State the complete sheet-thickness range for the required profiles.
04
Tooling & next operation
Confirm the roller set and any separate assembly or seam-closing equipment.
Quick Machine Comparison
| Machine | Typical connection | What to confirm | Next step |
|---|---|---|---|
| Multi-function Lock Former | Pittsburgh longitudinal seam and other confirmed profiles | Required profiles, material and thickness, compatible rollers. | View details → |
| S Lock Forming Machine | S-cleat profiles and compatible duct connections | Cleat section, mating parts, material and thickness. | View details → |
| Snap Lock Forming Machine | Compatible snap-lock corner connection | Both mating edges, profile dimensions, material and thickness. | View details → |
| Elbow Lock Forming Machine | Conventional or snap-lock elbow seams with suitable tooling | Elbow geometry, required seam, material and thickness. | View details → |
Forming and seam closing may require separate equipment. Reference capacity is model-specific and must be checked for your material.
SELECTION HELP
Not Sure Which Machine Fits?
Send us a duct photo, seam sketch or drawing. Tell us the material and thickness — we’ll help you choose a suitable configuration.
- 1 · Share your drawingShow the duct, seam and mating parts.
- 2 · Confirm the requirementsSpecify material, thickness and connection.
- 3 · Get a recommendationReview the machine and tooling with our team.
Frequently Asked Questions
Can one machine form every profile?
No. A multi-function lock former may support several profiles, but the included shapes depend on its model and roller tooling. Confirm each required section drawing. S-cleat, snap-lock and elbow applications can require dedicated equipment.
Does the machine also close the seam?
Forming prepares the sheet edge. Assembly, seam closing and any finishing are separate steps unless the quoted configuration explicitly includes them. Plan the complete duct fabrication process.
Should I choose only by the outside shape of the duct?
No. Rectangular ducts can use different longitudinal seams and end connections. Match the actual seam or cleat profile, mating edges, material grade and sheet thickness as well as the finished duct geometry.
What should I send for a recommendation?
Send a duct photo, seam sketch or section drawing, material grade, minimum and maximum sheet thickness, and destination power supply. Include the mating parts, elbow geometry where relevant, and production requirements.
How do I choose between Pittsburgh lock former models?
For the multi-function/Pittsburgh option, compare the actual material and thickness range with each model’s rated capacity, then confirm the required profile dimensions and roller set. Use the product detail page for model-specific reference specifications.