HARSLE Duct Machinery
From coil feeding to finished duct — HARSLE delivers precision-engineered equipment for every stage of rectangular and round duct production, trusted by fabricators in 60+ countries.
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Designed for precise bending and folding of galvanized steel sheets into rectangular duct panels. Delivers consistent bend angles with high repeatability, suitable for both manual and semi-automatic HVAC duct fabrication workflows.
A CNC-controlled production line for automatically punching, cutting, and forming angle steel into duct flanges. Streamlines the flange fabrication process with high output efficiency and dimensional accuracy.
Rolls flat angle steel stock into circular flange rings for round duct and fitting assemblies. Ensures uniform radius throughout the rolling process, producing flanges ready for welding or bolting.
Presses longitudinal reinforcement beads onto rectangular duct panels to increase structural rigidity and reduce vibration noise. Ideal for large-dimension ducts that require extra stiffness between flanges.
Automated CNC plasma cutting system for fast, precise profiling of sheet metal blanks used in duct fittings and custom components. Supports complex contour cutting with minimal kerf and heat-affected zones.
Automatically inserts and presses TDF/TDC corner pieces into formed duct flanges, completing the rectangular duct frame assembly in seconds. Reduces manual labour and ensures consistent corner joint quality.
Punches bolt holes and notches into duct corner connectors and flange sections for precise fastener alignment. Delivers clean, burr-free holes that speed up on-site duct assembly and ensure airtight connections.
A complete automated production line integrating coil feeding, leveling, plasma cutting, notching, beading, and flange forming into one continuous workflow. Maximizes throughput for high-volume rectangular duct manufacturing.
Fabricates segmented elbows and curved fittings for round duct systems. Supports multiple elbow angles (15°–90°) and diameters, ensuring smooth airflow transitions that meet SMACNA and ASHRAE standards.
Electrically driven shear for cutting galvanized or stainless steel sheets to precise duct blank dimensions. Produces straight, clean cuts with minimal distortion, supporting continuous duct shop production.
Roll-forms TDF/TDC flanges directly onto the edges of rectangular duct panels in a single pass. Eliminates the need for separate angle iron flanges, reducing material cost and assembly time significantly.
Hydraulically powered riveting press for fastening duct panels, flanges, and fittings together with high and consistent clamping force. Suitable for both spot riveting and full-seam riveting in production environments.
Forms Pittsburgh seam locks on the longitudinal edges of rectangular duct panels, enabling four sides to snap together without fasteners. Produces tight, airtight seams essential for efficient HVAC systems.
Closes and locks the Pittsburgh seam on assembled rectangular duct sections, applying uniform pressure along the full seam length. Guarantees leak-free longitudinal joints in compliance with HVAC installation codes.
Electrically driven three-roll machine that curves flat sheet metal blanks into cylindrical duct sections for round duct fabrication. Adjustable roll gap accommodates various material thicknesses and duct diameters.
Adds circumferential reinforcement beads to round duct cylinders to improve structural strength and reduce resonance noise under air pressure. Essential for long straight runs and noise-sensitive installations.
Forms continuous spiral-seam round ducts from strip coil at high speed. The helical lock seam provides superior strength and airtightness compared to longitudinal-seam ducts, making it the industry standard for HVAC round duct supply.
