--- title: Optimize Your HVAC Duct Fabrication with Engel Button Punch Snap Lock Roll Formers description: The Engel Button Punch Snap Lock Roll Formers form a two piece seam that greatly simplifies ductwork assembly. image: https://blog.mestekmachinery.com/hubfs/Engel-800-Series-Pittsburgh-Lock-Roll-Former.png --- [![Formtek Group](https://blog.mestekmachinery.com/hs-fs/hubfs/raw_assets/public/Mestek_Machinery_January_2022/images/MestekM.png?width=219&height=553&name=MestekM.png "Formtek Group")](https://mestekmachinery.com/) - [About Mestek Machinery](https://mestekmachinery.com/about-mestek-machinery/) - [Brands](https://mestekmachinery.com/brands/) - [Metal Forming and Fabrication Solutions](https://mestekmachinery.com/metal-forming-and-fabrication-solutions/) - [Industries](https://mestekmachinery.com/industries-served/) - [Service and Support](https://mestekmachinery.com/service-and-support/) - [Pre-Owned Machinery](https://mestekmachinery.com/service-and-support/pre-owned-machinery/) - 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[Industries](https://mestekmachinery.com/roto-die/industries-served/) - [Metal Forming and Fabrication Solutions](https://mestekmachinery.com/roto-die/metal-forming-and-fabrication-solutions/) - [Video](https://mestekmachinery.com/roto-die/videos/) - [About Roto-Die](https://mestekmachinery.com/roto-die/about-roto-die/) - [Contact Roto-Die](https://mestekmachinery.com/roto-die/contact-us/) [![get a quote](https://blog.mestekmachinery.com/hubfs/getaquote.png)](https://mestekmachinery.com/about-mestek-machinery/#) #### [Get a Quote](https://mestekmachinery.com/about-mestek-machinery/#) ![Contact us icon](https://blog.mestekmachinery.com/hubfs/Contact-us-icon-black.png) #### Contact Us # Optimize Your HVAC Duct Fabrication with Engel Button Punch Snap Lock Roll Formers May 5, 2025 | by Mestek Machinery The Engel Button Punch Snap Lock Roll Formers form a two piece seam that greatly simplifies ductwork assembly. The male seam is a button, the female seam is a lock, and the two snap together for a flush corner. Not only do these locks assemble twice as fast as traditional methods, but because the two pieces nest, they are easier to transport too. ### Engel Button Punch Snap Lock Seam Roll Former Specs These machines are available in eight forming station machines. An optional slitter attachment is available to fit each sheet metal shop's specific needs. The Button Punch Snap Lock Roll Former is available in 3 models, each with different gauge capacities. | **Model** | **Capacity** | **Depth of Pocket / Size** | **Speed** | **Motor / Voltage** | **Dimensions / Weight** | | --- | --- | --- | --- | --- | --- | | HB-800B-24 | 24-28 gauge | 1/2" — uses approximately 1-13/16" of material | 90 feet per minute | 5HP, 230/460 volts, 60 cycle, 3 phase, A.C. 1,800 RPM Other motors available upon request | Length: 60" Width: 24" Height: 37" Passline: 34" Weight: 950 lbs. | | HB-800B-20 | 20–26 gauge | 1/2" — uses approximately 1-13/16" of material | 90 feet per minute | 5HP, 230/460 volts, 60 cycle, 3 phase, A.C. 1,800 RPM Other motors available upon request | Length: 60" Width: 24" Height: 37" Passline: 34" Weight: 950 lbs. | | HB-800B-18 | 18-24 gauge | 1/2" — uses approximately 1-13/16" of material | 90 feet per minute | 5HP, 230/460 volts, 60 cycle, 3 phase, A.C. 1,800 RPM Other motors available upon request | Length: 60" Width: 24" Height: 37" Passline: 34" Weight: 950 lbs. | ### Featured Seam Profiles ![Engel-800-Series-Roll-Former-Profiles-min](https://blog.mestekmachinery.com/hs-fs/hubfs/Engel-800-Series-Roll-Former-Profiles-min.jpeg?width=800&height=472&name=Engel-800-Series-Roll-Former-Profiles-min.jpeg) ### Solutions from the Engel 800 Series To learn more about the Button Punch Snap Lock Roll Former and download our brochure, [click here.](https://mestekmachinery.com/project/brochure-engel-800-series-button-punch-snap-lock-roll-formers/) To learn more about other Engel 800 Series Roll Formers, click here: - 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