Coil Winding & Tube Coiling Services
Custom helical coils, spiral tube assemblies, and multi-turn wound tubing for heat exchangers, immersion heaters, and industrial thermal systems. Stainless steel, copper, titanium, Inconel, and exotic alloys. Prototypes to production.
Request a Quote Call 952-881-5184What Is Tube Coil Winding?
Tube coil winding forms straight tubing into helical, spiral, or multi-turn coil shapes that pack maximum tube length into a compact envelope. These wound coils are the backbone of heat exchangers, immersion heaters, condensers, cooling jackets, and countless other thermal transfer systems where surface area and space efficiency matter.
Precision coil winding demands careful control of pitch (the spacing between turns), coil diameter, ovality, and surface finish throughout the winding process. Each material responds differently to the forming forces involved — copper coils freely, stainless steel requires more force and springback compensation, and exotic alloys like Inconel and titanium demand specialized tooling and decades of hands-on experience.
Our Coil Winding Capabilities
Ross Bending Dynamics combines CNC precision with decades of hands-on coil forming expertise. Whether you need a single prototype coil to prove out a heat exchanger design or a recurring production run of 500 assemblies, we have the equipment, materials knowledge, and engineering mindset to deliver.
Helical Coils
Single-layer and multi-layer helical coils wound to precise diameter, pitch, and turn-count specifications. We control ovality and maintain consistent spacing across every revolution for uniform heat transfer performance.
Spiral & Pancake Coils
Flat spiral (pancake) coils and Archimedean spirals for applications where a radial coil geometry is required — common in heat exchangers, reactor vessels, and embedded heating elements.
Multi-Turn & Nested Coils
Coil-within-a-coil configurations, counter-wound dual coils, and nested assemblies for compact heat exchanger designs that require maximum surface area in minimum space.
Exotic Alloy Expertise
Coil winding in titanium, Inconel, Hastelloy, Monel, and duplex stainless steels. We understand the springback characteristics, work-hardening behavior, and surface-finish requirements of every alloy we form.
Complete Fabrication
Coil winding is just the start. We provide TIG/MIG welding, brazing, end-forming, header assembly, and pressure testing so your coils arrive ready to install — not as loose parts needing secondary processing.
Quality & Traceability
Full material certifications, first-article inspection reports, and process documentation for regulated industries. We wind to your print, verify to your spec, and ship with the paperwork you need.
Materials We Coil
We stock and process a wide range of tube materials for coil winding applications. If your project calls for an alloy not listed here, call us — chances are we have wound it before.
304 & 316 Stainless Steel
Copper & Copper-Nickel
Titanium (Grade 2, Grade 5)
Inconel 625 & 718
Hastelloy C-276
Monel 400
Duplex & Super Duplex SS
Carbon Steel
Aluminum (6061, 5052)
Chrome-Moly (4130)
Industries We Serve
Our wound tube coils and coil assemblies work inside critical systems across a range of demanding industries:
HVAC & Refrigeration
Condenser coils, evaporator coils, chiller tube bundles, heat pump assemblies
Energy & Power Generation
Heat recovery coils, boiler tubes, superheater coils, solar thermal collectors
Food, Dairy & Pharmaceutical
Sanitary immersion coils, pasteurizer tubes, clean-in-place heating elements
Chemical & Petrochemical
Corrosion-resistant coils in Inconel, Hastelloy, and titanium for reactor vessels and aggressive media
Aerospace & Defense
Precision coils for thermal management, hydraulic cooling, and environmental control systems
Medical Devices & Life Sciences
Precision coils for sterilization equipment, diagnostic imaging systems, and surgical instrument cooling
Semiconductor
Ultra-clean coils for wafer processing equipment, chemical delivery systems, and thermal management in fab environments
OEM Manufacturing
Recurring production runs of coil assemblies for equipment builders, water heaters, and industrial machinery
How It Works
1
Send Your Specs
Upload a drawing, CAD file, or describe your coil requirements via our quote form or email.
2
Engineering Review
Our team reviews for manufacturability and may suggest design optimizations to save cost or improve performance.
3
Quote & Approval
Receive a detailed quote with pricing, lead time, and material options. Typically within 24–48 hours.
4
Fabrication & Delivery
We wind, weld, inspect, and ship. First-article reports available. Prototypes in days, production on your schedule.
Why Engineers Choose Ross Bending Dynamics
We are not a commodity bending shop. Ross Bending Dynamics was built for the projects that other shops turn away — the exotic alloys, the tight-tolerance coil assemblies, the one-off prototypes that need to be right the first time. Here is what makes working with us different:
Speed
Quick-turn prototypes in days, not weeks. We understand that your timeline drives product launches and engineering milestones. We do not let coil fabrication become your bottleneck.
High-Mix Capability
We thrive on variety. One helical coil in titanium today, fifty stainless assemblies tomorrow, a Hastelloy prototype next week. Our shop is built for the job mix that overwhelms high-volume-only competitors.
Engineering Mindset
We do not just follow your print — we think about it. If a coil diameter change saves you 20% on material cost or a pitch adjustment improves thermal performance, we will tell you before we start winding.
Frequently Asked Questions
What is the difference between coil winding and standard tube bending?
Standard tube bending creates individual bends at specific angles in a tube. Coil winding continuously forms tubing around a mandrel or form to create helical, spiral, or multi-turn coil shapes. The winding process requires precise control of pitch, diameter, and springback across every revolution to produce coils with consistent thermal performance.
What tube diameters can you wind into coils?
We wind tubing from 1/8" to 3" outside diameter into coils, depending on the material, wall thickness, and target coil diameter. Tighter coil diameters require smaller tube OD or thinner walls. Contact us with your specific dimensions and we will confirm feasibility.
Can you wind exotic alloys like titanium and Inconel into coils?
Yes. Exotic alloy coil winding is one of our core specialties. We routinely wind titanium, Inconel 625/718, Hastelloy C-276, Monel, and duplex stainless steels. Each alloy has unique springback and work-hardening characteristics that we have learned to manage over decades of fabrication experience.
What is the difference between a helical coil and a spiral coil?
A helical coil wraps tubing in a cylindrical shape — like a spring — with each turn stacked above the previous one. A spiral (or pancake) coil winds tubing in a flat plane, expanding outward from the center like a cinnamon roll. Both geometries serve different heat transfer and space requirements, and we fabricate both.
What is your typical lead time for coil winding?
Prototypes and small batches typically ship in 1–2 weeks from order approval, depending on material availability. Production runs are scheduled based on quantity and complexity. Rush turnaround is available — call us to discuss your timeline.
Where is Ross Bending Dynamics located?
We are located in Bloomington, Minnesota, and serve customers nationwide. For exotic alloy and specialty coil winding, we work with engineers and OEMs across all 50 states. Regional customers in the Twin Cities, greater Minnesota, Wisconsin, Iowa, and the upper Midwest benefit from shorter shipping times and the option for local pickup.
