Automatic Spring Making Machine

Overview

The Gongda ZDTHJ-12 Automatic Spring Making Machine is a dedicated rebar processing solution for producing coil springs from 6 mm to 12 mm wire, with a finished loop diameter range of 90 mm to 200 mm. Built by Gongda (China Rebar Machinery, chinarebarmachinery.com) in Hefei, Anhui, China, the machine traces its engineering roots to the electromechanical works of Hefei University of Technology. It is designed for continuous, automated spring production in fabrication shops, precast plants, and rebar processing yards that need consistent coil output rather than manual forming.

Key specifications explained

• Loop diameter (打圈直径): 90 mm–200 mm — covers the common coil sizes used in rebar tying, prestressing, and general fabrication work.
• Wire diameter (打圈线径): 6 mm–12 mm — accepts standard rebar and wire gauges within this band; material outside this range is not supported by this model.
• Forming speed (打圈速度): 15 m/min — supports steady batch output with repeatable loop geometry.
• Motor power: 4 KW — matched to the 6–12 mm wire range for stable, continuous operation.
• Hydraulic cutting pressure (液压切断压力): 4–10 MPa — adjustable cutting force for clean separation across the wire range.
• Working temperature: -5 to 50 °C — suitable for unheated workshops and hot-climate sites alike.
• Hydraulic oil: 46# (anti-wear hydraulic oil) — a widely available grade, simplifying maintenance and refills.
• Dimensions: 2260 × 960 × 1250 mm — compact footprint for a machine of this capacity, easy to position in an existing line.

Applications

The ZDTHJ-12 suits rebar fabricators producing coil springs for construction and industrial use, precast concrete plants requiring consistent loop sizes, and processing yards handling 6–12 mm wire. Because loop diameter and cutting pressure are adjustable within the stated ranges, one machine can cover multiple spring sizes without tooling changes beyond normal setup.

Why buy this model from Gongda

Gongda is a China-based rebar machinery manufacturer with a factory heritage linked to Hefei University of Technology’s electromechanical works. The company exports rebar processing machines worldwide, including to Russia, Spain, Latin America, the Middle East, Southeast Asia, and Africa. Buyers get factory-direct pricing, documented specifications, and a machine built for the 6–12 mm wire segment rather than a general-purpose unit. EAC certification is available for buyers who require it.

Shipping, certification & support

• Shipping terms: FOB Shanghai, Ningbo, or Qingdao.
• Certification: EAC certification available on request.
• Warranty: 12-month warranty.
• Spare parts: ongoing spare parts support.
• Sales support languages: English, Russian, Spanish, Arabic, French, Portuguese, German, and Indonesian.
• Contact: WhatsApp +86 193 9277 7259; website chinarebarmachinery.com.

For B2B buyers comparing rebar spring machines, the ZDTHJ-12 offers a defined wire and loop range, clear hydraulic and electrical specs, and export-ready logistics and documentation from a Chinese manufacturer with established international channels.