Gw42D Steel Bar Bender/Automatic Steel Bar Bender

GW42D Steel Bar Bender


I. Features and Advantages:
The GW42D steel bar bender is a high-performance bending machine designed for construction sites. It offers several advantages such as an integrated enclosed housing that ensures even load distribution and prevents local deformation. The unit is built with strong materials, including high-quality carbon steel for the gear shaft and main spindle, and heat-treated parts for long-lasting durability. The main spindle is supported by high-capacity ball bearings, ensuring smooth operation and extended service life. The working disc and square steel are made from durable carbon steel, while the pile heads and tips are made of alloy steel with high hardness for reliable use over time. This model also features a brake motor, adjustable square steel, and a bolt-type positioning disc, allowing for accurate angle adjustments and self-returning functionality. Additionally, the machine is easy to maintain. Unlike traditional models, it doesn't require constant refueling, making operation and maintenance more convenient. The bending mode can be switched between manual and automatic using the brake motor. II. Main Technical Parameters:
Model: GW42D
Bending Diameter: Φ6 - Φ40 (for plain round bars ≤ 450 MPa), Φ6 - Φ36 (for deformed bars)
Work Disc Diameter: 360 mm
Motor Power: 3 kW (4-pole)
Spindle Speed: High speed 10 rpm, Low speed 7 rpm
Weight: 340 kg
Overall Dimensions: 910 * 730 * 810 mm
Optional Motor Voltage: 220V / 415V / 440V
Frequency: 50 Hz / 60 Hz



III. Pre-Operation Preparation:
3.1. Inspection
(1) Check if the outer packaging is damaged or if there are any parts that could affect normal operation.
(2) Ensure all nuts, bolts, and screws are securely fastened.
3.2. Installation
(1) Choose a flat and stable ground, and ensure the machine is level.
(2) Leave enough space for raw material storage and transportation.
(3) Ensure the power supply voltage is within the standard range (+10%) and has proper grounding.
(4) After moving the machine to the site, connect the power and perform a test run.
(5) Insert the foot switch into the socket of the electric door.
3.3. Lubrication
Open the oil cap on the table top and fill it with CKC68 gear oil up to two-thirds of the oil window (or about 10 kg). IV. Debugging:
After completing the above steps, connect the power supply and perform pre-commissioning when the power light indicates the system is on.
(1) Turn on the OPEN CIRCUIT, MOTOR FORWARD AND REVERSE BUTTON to connect the power.
(2) Press the START button to make the motor rotate forward. If it doesn’t work, switch the OPEN CIRCUIT, MOTOR FORWARD AND REVERSE BUTTON to the other side.
(3) Switch the MANUAL/AUTO button to AUTO, insert the angle positioning pin into the holes on the working disc, then step on the foot pedal to start the machine. When the pin reaches the reverse position switch, the motor will reverse. If not, check the circuit and ensure the pin touches the switch.
(4) Use the ANGLE TRANSFORMATION SWITCH to alternate between different angles. For example, set the pin at 90°, bend the steel, then switch the angle and bend at 135°.
(5) Switch the MANUAL/AUTO button to MANUAL, press the START FORWARD or MANUAL REVERSE button to operate continuously. A single click will only trigger one cycle. V. Load Testing:
(1) Select the appropriate center pile head, pile head, and sleeve based on the steel size. Place the positioning and keep-off pile heads according to the bending direction.
(2) Adjust the bending radius based on the steel diameter and tensile strength.
(3) Place the steel on the working disc, adjust the striker plate to press against the steel, and align the square bar with the center pile head. For safety, place a keep-off pile head beside the square bar.
(4) At least two people should work together when bending long bars.
(5) Keep the working area and non-pile head side clear of people.
(6) Press the START FORWARD button to begin bending. For automatic machines, insert the angle positioning pin to avoid continuous operation and potential accidents.
(7) Stop the machine immediately in case of an emergency and restart after clearing the issue.
(8) Do not bend bent or irregular steel bars to prevent accidents. VI. Maintenance:
1. Change the lubricating oil three months after starting the machine, and annually thereafter. Oil changes should be done while the engine is warm.
How to change oil:
Remove the oil drain screw under the reducer, drain the old oil, restart the engine to expel residual oil, then tighten the screw and refill with new gear oil.
2. Choose the right pile head and sleeve based on the steel’s strength and diameter. Avoid using small pile heads for large-diameter bars.
3. Clean the working disc after each shift and apply lubricating grease. Do not add oil or grease while the machine is running.
4. Do not replace the center pile head, keep-off pile head, or striker plate.
5. Apply anti-corrosive grease to the working disc and store the machine in a dry place for long-term storage. Quick Wear Parts List: Accessories Included:

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