The Shuliy SRB Series Rebar Circle Bending Machine is designed for producing circular rebar rings, spiral bars, and curved reinforcement components from 3–25 mm steel bars. It combines feeding, straightening, circle forming, spiral forming, and hydraulic cutting in one machine.

For contractors and rebar fabrication plants, the machine is intended to replace separate straightening, bending, and cutting steps with a programmed forming process. It is suitable for repeat orders where ring diameter, bar diameter, and production consistency need to be controlled.

What Can a Rebar Circle Bending Machine Produce?

A Rebar Circle Bending Machine can produce single circular rings, continuous spiral reinforcement, and curved rebar sections according to the forming setting. These products are commonly used in pile foundation cages, bridge structures, tunnel support, precast concrete components, photovoltaic ground anchors, and other reinforcement assemblies.

The finished product is not limited to one fixed diameter. The appropriate ring size depends on the selected model, rebar diameter, material condition, and forming requirement. Across the SRB Series, the available finished ring diameter range is 50–3000 mm.

For buyers comparing a rebar ring making machine with a conventional bending machine, the main difference is process continuity. A ring-forming machine feeds and forms the bar continuously before cutting, which is useful for repetitive ring or spiral production.

Close-up of rollers forming steel rebar into a circular coil
Continuous spiral rebar reinforcement produced by a circle bending machine

How the Shuliy SRB Series Works

The Shuliy SRB Series Rebar Circle Bending Machine uses a PLC-controlled sequence. First, the motor drives the hydraulic oil pump. The hydraulic system then operates the straightening gearbox and moves the steel bar forward through the guide and straightening section.

After straightening, the material enters the rounding assembly. The forming unit bends the bar into the required circle or spiral profile. When the programmed length, ring diameter, or number of turns is reached, the hydraulic cutting cylinder cuts the material and completes the cycle.

The process can be summarized as:

Steel bar feeding → pre-adjustment → straightening → circle or spiral forming → hydraulic cutting → finished product collection

This configuration makes the machine a practical CNC rebar rounding machine for batches of repeatable products. Actual output depends on bar diameter, ring circumference, number of turns, material grade, and operator settings.

Technical Specifications

ModelRebar DiameterFinished Ring DiameterTotal PowerTravel SpeedWorking ToleranceDimensionsWeight
SRB-3/63–6 mm50–1000 mm4 kW16–25 m/min±0.2 mm1.45 × 0.8 × 1.2 m480 kg
SRB-6/106–10 mm50–800 mm5.5 kW16–25 m/min±0.2 mm1.55 × 0.8 × 1.3 m560 kg
SRB-8/128–12 mm50–1500 mm7 kW16–25 m/min±0.2 mm1.55 × 0.8 × 1.3 m640 kg
SRB-10/1410–14 mm50–1800 mm7 kW16–25 m/min±0.2 mm1.6 × 0.8 × 1.35 m690 kg
SRB-16/2016–20 mm50–2200 mm11 kW16–30 m/min±0.2 mm2.1 × 0.9 × 1.5 m1150 kg
SRB-22/2522–25 mm50–3000 mm15 kW16–30 m/min±0.2 mm2.3 × 0.9 × 1.7 m1350 kg

The listed travel speed refers to the material feeding and processing speed, not a fixed number of finished rings per hour. A larger ring requires more bar length per piece, so the final production quantity should be calculated according to the required diameter and product design.

The stated ±0.2 mm working tolerance is a machine specification. In production, finished-part accuracy should be verified with the buyer’s actual steel grade, rebar diameter, and target shape before finalizing the order.