Automatic Rebar Spring Making Machine (ZDTHJ-12)

Automatic Rebar Spring Making Machine ZDTHJ-12: Helical and Spiral Rebar Production at 12mm

If your fabrication shop produces helical reinforcement cages, spiral stirrups, or coiled rebar components, the bottleneck is rarely the bending itself — it is consistency. Hand-wound or semi-manual spiral forming produces variable pitch, uneven diameters, and rework that eats into margin. The ZDTHJ-12 automatic spring making machine from Gongda (China Rebar Machinery) is built specifically for this job: continuous, automated forming of helical and spiral rebar up to 12mm.

What the ZDTHJ-12 Actually Does

The ZDTHJ-12 is a dedicated automatic spring/coil forming machine. Unlike a CNC bending center that works in discrete bends, this unit feeds rebar or wire continuously and forms it into a helix — the geometry used in spiral stirrups for columns and piles, helical reinforcement cages, and industrial coil products.

• Maximum stock diameter: 12mm
• Forming mode: continuous automatic helical/spiral winding
• Typical output: spiral stirrups, helical cages, coil springs from rebar and wire
• Control: automated feed and pitch control, reducing operator-dependent variation

For buyers comparing options: if your work is discrete bending (stirrups with straight legs and defined angles), a GW25 CNC single-head stirrup bender (round steel up to 25mm) or a ZD-6M-25 / ZD-6M-20 five-head stirrup machine is the right tool. The ZDTHJ-12 is the correct choice when the product is a continuous coil or helix.

Why Automation Matters for Helical Rebar

Spiral reinforcement is specified by diameter, pitch, and total length. Manual winding makes all three hard to hold. Practical consequences on site:

• Pitch drift — inspectors reject cages where spacing varies beyond tolerance.
• Diameter inconsistency — cages that do not fit the formwork or the specified cover.
• Labor cost — two operators on a manual winder versus one supervising an automatic machine.
• Throughput — continuous automatic forming removes the stop-start cycle of manual work.

Automation on the ZDTHJ-12 addresses these directly: once diameter and pitch are set, the machine repeats them across the full production run. That is the difference between a batch that passes inspection and a batch that gets sorted by hand.

Where It Fits in a Rebar Fabrication Line

Most buyers pair the ZDTHJ-12 with upstream and downstream equipment rather than running it standalone:

• Upstream: a YGT4-15A straightening and cutting machine (4–15mm, VFD-controlled) to deliver straight, cut-to-length stock ready for coiling.
• Downstream: HGS-40 thread rolling machine (up to 40mm) for mechanical splice preparation, or NB-350 / NB-500 MIG/CO2 welders for cage assembly and tack welding.
• Parallel production: GQ50A (6–50mm round / 6–36mm ribbed) or GQ70A cutting machines (70mm, 160-ton shear force) for the straight bar components of the same cage.

This is the practical advantage of buying from a single source: the ZDTHJ-12 is dimensioned to work alongside the rest of the Gongda range, not as an isolated unit with mismatched feed stock.

Specification Notes Before You Buy

Three things determine whether the ZDTHJ-12 matches your work:

• Material type and grade. Confirm whether you are running plain round wire, deformed rebar, or high-tensile stock. Deformed bar behaves differently in continuous forming than smooth wire — specify this at inquiry.
• Coil geometry. Provide the target inner diameter, pitch range, and maximum coil length. These drive tooling setup.
• Volume. Automatic spring making pays back fastest on repeat production. For one-off coils, a manual or semi-automatic approach may be adequate — be honest about your order pattern.

Also confirm power supply requirements for your region. Gongda exports to Russia, Spain, Latin America, the Middle East, Southeast Asia, and Africa, and EAC certification is available for Russian and Eurasian Economic Union buyers — relevant if your project requires documented conformity.

Buying from Gongda / China Rebar Machinery

Gongda is based in Hefei, Anhui, China, with the factory rooted in the electromechanical works of Hefei University of Technology. That engineering background shows in the range: GJZD6-50CZ and GJZD6-65CZ CNC bending machines (50mm and 65mm, 420mm working table), GDWQ4-15A CNC rebar forming machine (single/double line), GWH50CG / GWH50CZN arc benders (50mm), SKDZWH-36 / GDWHWQ-36 CNC arc benders (36mm), GDLWZX-32 vertical bending center (32mm), GDPMW-60 plane bending center (60mm), GDQX-500 hydraulic rebar shearing production line, and GD-350ZD band saw (350mm).

For ZDTHJ-12 pricing, tooling options, and lead time, contact the export team directly:

• WhatsApp: +86 193 9277 7259
• Email: yuhua0095@gmail.com

Send your coil diameter, pitch, material grade, and monthly volume — that is enough to get an accurate configuration recommendation rather than a generic quote.