The gap between manual stirrup bending and machine bending is not just about speed. The real change brought by an automatic stirrup bender is: stirrup accuracy goes from “roughly” to “±1mm, ±1°”, production capacity goes from “depending on the worker” to “depending on the machine”, and manpower goes from “4-6 people” to “1 operator”. Whether you need mass production for building projects or custom shaped stirrups for bridge engineering, an automatic stirrup bender can handle it.
An automatic stirrup making machine is a special device that uses computer program control to automatically process coiled (or rebar) steel into various shapes of stirrups in one pass, integrating straightening, measuring, bending, and cutting into one process with no manual intervention.
Compared with traditional manual bending, the core difference of an automatic stirrup making machine lies in the word “automation”: coiled rebar does not need a pay off stand; just feed it directly; the straightening speed automatically matches the bending speed, no manual coordination needed; bending angles are precisely controlled by the program, so every stirrup is much more consistent than hand made. The cutting system uses a sliding blade design, so even small stirrups do not cause excessive wear.
In terms of applications, an automatic stirrup bending machine mainly serves the stirrup processing needs of building construction, bridge engineering, tunnel engineering, and precast concrete plants, suitable for both cold-rolled and hot-rolled rebar. The operating temperature range is -5°C to 40°C, so it works normally whether on a hot southern site or a cold winter site.
Main components of an Automatic Stirrup Bender
A complete rebar stirrup bending machine consists of the following core components working together:
Straightening system – consists of two sets of automatically adjustable straightening wheels (horizontal and vertical) plus four traction wheels, all driven by servo motors. This system straightens the coiled rebar to a standard straight line, ensuring the accuracy basis for subsequent bending. The frame type rotating straightening structure is one of the key technologies of an automatic stirrup bending machine.
Digital length measuring system – precisely measures the feed length of the rebar, automatically calculating each segment’s size based on preset shape parameters. This system is the core guarantee for achieving ±1mm length accuracy.
Bending mechanism – consists of a bending arm driven by an independent servo motor, which can rotate and extend at high speed. The bending arm completes various angle bends according to program commands, with a maximum bending angle of ±180° and bending speed up to 1000°/s.
Cutting mechanism – uses a sliding blade design, driven by a servo motor to cut quickly. Unlike traditional blades, the sliding blade does not cause excessive wear when processing small stirrups, extending tool life.
Control system – PLC industrial controller with touchscreen interface, which is the “brain” of the whole automatic stirrup bender. The system has a built-in shape library, supports fault detection and alarm functions, and the straightening speed automatically matches the bending speed to ensure continuous production stability.
What Shapes of Stirrups Can an Automatic Stirrup Bender Process?
The processing capability of an automatic stirrup making machine goes far beyond simple square stirrups. Taking the YG series as an example, the machine can design and store up to 60 bends for various shapes, covering the following types:
Rectangular/square stirrups – the most basic form, used for standard reinforcement of columns and beams. Four right angle bends are completed in one go, much more efficient than manual work.
Polygonal stirrups – such as hexagon, octagon, etc., used for special section columns or confinement members. The machine achieves these through multiple continuous bends at different angles.
Spiral stirrups – continuous spiral shapes for cylindrical members. The automatic stirrup bending machine precisely controls the feed speed and bending angle synchronously to achieve equal pitch spirals.
Tie bars (S-shaped) – used as binding reinforcements for shear walls and slabs. Two symmetrical hooks are completed in one process.
Profile shapes – complex flat shapes with multiple non standard angles, used for special joints or irregular members. The shape library supports custom input to meet non standard needs.
Double line simultaneous processing – some YG models support double line processing, producing double the number of stirrups in the same time, greatly improving efficiency in mass production.
Why Choose the YG Automatic Stirrup Making Machine?
Efficiency advantage – Each YG automatic stirrup bender can match the output of 4- 6 skilled workers, but only requires one operator. With rising labor costs, this advantage means saving tens of thousands of dollars annually.
Accuracy guarantee – Length accuracy ±1mm, angle accuracy ±1°. The three layer precision control system of dual straightening + servo bending + digital measuring ensures every stirrup meets engineering specifications.
Continuous production without interruption – The machine can continuously process different shapes of stirrups without stopping. Switching shapes just requires selecting on the touchscreen; no mechanical adjustment is needed, and even correcting bending angles does not interrupt the process.
Easy operation – PLC controller + touchscreen interface is intuitive; workers can operate independently after short training. Fault detection automatically alerts and indicates the cause when problems occur, reducing downtime.
Complete range, covering all sizes – Six models from YG-1 (max 10mm plain bar single line) to YG-5-16S (max 18mm plain bar single line) cover all processing needs from small building stirrups to large diameter bridge stirrups. Coiled rebar feeds directly without a pay-off stand, especially suitable for space limited sites.
Q1: Can an automatic stirrup bender process two bars at the same time? A: Yes. Several YG models support double line synchronous processing. The double line range is typically 4-14mm plain bar and 4-12mm rebar (depending on model), producing two stirrups simultaneously.
Q2: How complex shapes can the machine handle? A: Up to 60 bends for various shapes and profiles. The built in shape library covers common shapes and also supports custom shape input.
Q3: Does coiled rebar need extra pay off equipment? A: No. The rebar stirrup bending machine feeds the same as a standard straightening machine, directly feeding coiled rebar without a pay off stand, simplifying site layout.
Q4: Do we need to stop when switching stirrup sizes during processing? A: No. The automatic stirrup bending machine can seamlessly switch between different shapes in continuous production; just select on the touchscreen, no mechanical adjustment needed.
Q5: What is the energy consumption? A: For example, YG-1 has a total power of 14 kW and an average consumption of only 4.5kW/h. Even the largest model YG-5-16S, averages only 12kW/h, excellent energy efficiency.
Contact YG
Every project has different requirements for stirrup size, shape, and output, so the selection of an automatic stirrup bender requires professional matching. YG not only offers the full range from YG-1 to YG-5-16S in stock, but can also provide customized production line layout suggestions based on your rebar diameter range, peak daily output, and site dimensions. From installation and commissioning to operation training, we follow through the entire process. Let an automatic stirrup making machine truly integrate into your production system, not just be a standalone device – that is YG’s service commitment to every major client.
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