French Polynesia Project: ZGW-12C Automatic Stirrup Bending Machine Boosts B500B Rebar Stirrup Production
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Add time:2026-06-16 15:54
As infrastructure and commercial construction projects continue to grow in French Polynesia, local contractors are under increasing pressure to deliver projects faster while maintaining strict quality standards. For many companies, outsourcing stirrup production or relying on manual fabrication is no longer a sustainable option.
One of DAPU's recent customers, a well-established construction company in French Polynesia, faced exactly this challenge. Their daily projects required a large quantity of stirrups made from European-standard B500B hot-rolled deformed bars. However, low productivity, inconsistent dimensions, and rising labor costs were limiting their ability to meet project schedules.
After evaluating several options, the customer chose the DAPU ZGW-12C automatic stirrup bending machine, specifically designed to process high-strength reinforcing steel with high efficiency and accuracy.
Customer Background and Production Challenges
Customer Profile
- Local construction contractor in French Polynesia
- Large daily demand for rebar stirrups
- Projects involving residential buildings and infrastructure works
Production Requirements
The customer needed a solution capable of producing:
- 5.5-10 mm B500B hot-rolled ribbed bars
- Straight bars
- Rectangular stirrups
- Square stirrups
- 6-meter bars with 130° end hooks
Because project specifications frequently changed, the customer also needed the flexibility to create new shapes without complicated tooling changes.
Main Problems Before Investing
High Scrap Rate with B500B Material
B500B hot-rolled deformed bars have relatively high strength and hardness. Manual production and simple bending equipment often resulted in dimensional errors and a high rejection rate.
Labor Costs Were Increasing
Labor expenses in French Polynesia are relatively high. Producing stirrups manually required several workers while output remained insufficient to keep up with construction schedules.
Wide Variety of Products
The customer supplied different projects simultaneously, which meant many stirrup designs had to be produced. Conventional equipment lacked the flexibility needed for small batch changes and customized shapes.
DAPU Solution: ZGW-12C Automatic Stirrup Production Line
After studying the customer's material and production requirements, DAPU recommended the ZGW-12C CNC rebar bending machine.
Main Configuration
The complete system included:
- Two cannon-type pay-off racks
- Two wire guiding cages
- ZGW-12C main machine
- Air compressor
- Electrical cabinet
- 12-meter receiving rack
For B500B hot-rolled deformed bars, DAPU recommended cannon-type pay-off units instead of conventional wire carriers. High-strength materials generate greater resistance during feeding, and this configuration provides smoother wire release and more stable operation.
Technical Specifications of ZGW-12C
| Item | ZGW-12C |
|---|---|
| Raw Materials | B500A/B/C, CRB600H, CRB550. HRB400. HRB400E |
| Single Wire | Φ4-Φ12 mm |
| Double Wire | Φ4-Φ10 mm |
| Traction Speed | Up to 120 m/min |
| Bending Speed | 1100°/sec |
| Angle Accuracy | ±1° |
| Length Accuracy | ±1 mm |
| Receiving Rack Length | Up to 6 m |
| Minimum Bending Length | 80 mm |
| Maximum Bending Angle | 180° |
| Air Pressure | ≥0.6 MPa |
| Total Power | 33 kW |
| Energy Consumption | 6-7 kWh |
Results Achieved After Installation
80% Increase in Productivity
With a maximum feeding speed of 120 m/min, the customer's single-shift output increased by approximately 80%, allowing production to catch up with demanding project schedules.
Reduced Labor Costs
The PLC and touch-screen control system simplified operation. One operator could easily manage the machine, helping the company reduce labor requirements by nearly 50%.
Greater Flexibility
The CNC rebar bending machine allows users to create their own stirrup designs. The control system stores more than 100 shapes, eliminating repeated programming and reducing engineering preparation time.
Lower Maintenance Costs
Unlike traditional mechanical cutting systems, the cutting unit is driven by a servo motor, eliminating wear-prone mechanical components. This design is expected to reduce long-term maintenance expenses by at least 10%.
Customer Feedback
According to the customer:
"The ZGW-12C automatic stirrup bending machine solved our biggest challenge with B500B hot-rolled rebar. Our production capacity and delivery speed have improved dramatically."
After seeing the performance of the machine, the customer has already expressed interest in adding a welded mesh production line in the future.
Why Material Selection Matters in Automatic Stirrup Production
From an engineering perspective, not all reinforcing materials behave the same. High-strength grades such as B500B require more than just bending force. Feeding stability, straightening quality, dimensional accuracy, and machine durability all play a critical role in maintaining consistent output.
This is why choosing a reliable cnc rebar bending machine is often more important than simply comparing machine prices. A poorly matched system can lead to higher scrap rates, downtime, and increased operating costs over time.
DAPU: More Than a Machine Supplier
With over 25 years of experience in reinforcing steel processing equipment, DAPU provides more than individual machines. We help customers build practical production solutions based on their materials, product requirements, and local market conditions.
Our automatic stirrup bending machines are operating in more than 100 countries and are widely used for the production of stirrups, shaped bars, and reinforcement components for buildings, bridges, highways, airports, dams, and infrastructure projects.
Whether you are processing B500B, HRB400. or other high-strength reinforcing steel, DAPU can provide a suitable solution to improve productivity, reduce labor costs, and maintain consistent product quality.
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