Brand New Overhead Crane

The Brand New Double Girder Overhead Crane is a high-performance lifting solution designed for heavy-duty industrial applications. Engineered for strength, reliability, and precision, this crane is ideal for handling large loads in factories, warehouses, workshops, and production lines.
Built with two robust girders running parallel, the crane offers superior lifting capacity and enhanced stability compared to single girder models. It is equipped with a traveling trolley and electric hoist mounted between the girders, maximizing lifting height and optimizing space utilization.
Whether you're lifting steel coils, machinery parts, containers, or structural components, our double girder crane delivers smooth operation, advanced safety features, and long-term durability.

Core Components：Bearing, Gearbox, Motor, Pump

Place of Origin：Henan, China

Warranty：1 Year

Weight (KG)：2000 kg

Video outgoing-inspection：Provided

Machinery Test Report：Provided

Design：Double beam

Effectiveness：high efficiency

Operating speed：High speed operation

Stability：Anti-swing function

Color：Optional

Power Source：110V/220V/230V/380V/440V,customized

Span：7.5-31.5m

1.Main beam

Key Characteristics of the Main Beam:
Material: High-strength steel (usually Q235B or Q345B), ensuring excellent load-bearing capability and structural integrity.
Structure: Welded box-type construction or rolled I-beam (customizable based on project requirements).
Design: Precision-engineered for minimal deflection and vibration under full load.
Camber: Properly cambered to compensate for load-induced bending and ensure long-term straightness.
Surface Treatment: Sandblasted, rust-proofed, and coated with industrial-grade primer and finish paint for enhanced corrosion resistance.

2.Lifting System

1)Electric Hoist / Trolley Winch
Type: Wire rope electric hoist or open winch trolley (based on capacity)
Position: Travels along the rails mounted on the top of both girders
Function: Performs both lifting and cross-travel movement
2)Lifting Motor
High-torque motor with thermal protection
Available in dual-speed or variable frequency options (VFD)
3)Wire Rope / Chain
High-strength galvanized steel wire rope
Anti-twist, wear-resistant, and designed for heavy-duty usage
4)Drum & Pulley System
Grooved drum to prevent rope slippage
Smooth and stable load winding/unwinding
5)Brake System
Electromagnetic or hydraulic brakes
Automatic braking in case of power failure
Fast and reliable stopping
6)Load Hook
Forged steel hook with 360° rotation
Equipped with safety latch

3.End carriage

The end carriages are crucial components of a double girder overhead crane, responsible for supporting the main girders and enabling smooth, stable longitudinal (crane) travel along the runway beams. Precision-engineered and built for durability, the end carriages ensure optimal alignment, weight distribution, and traveling performance under all working conditions.

4.Crane travelling mechanism

1)Travel Drive Motors
Heavy-duty motors, typically squirrel cage or pole-changing types
Optional variable frequency drive (VFD) for smooth acceleration and deceleration
Soft start function reduces mechanical stress and enhances motor life
2)Gearbox Units
Precision-engineered gear reducers with high torque transmission
Compact design with oil-lubricated gears for long service life
Often integrated with the motor for space efficiency (motor + gearbox + brake combined)
3)Crane Wheels & Axles
High-strength alloy steel wheels with hardened surfaces for extended durability
Available in flanged or flat types, depending on the rail design
Equipped with self-aligning bearings to minimize wear and noise
4)End Carriages (Traveling Mechanism Base)
Robust box-type welded structures
Houses the wheels and drives, ensures stable and aligned movement
5)Control System
Manual pendant, remote control, or cabin control available
Travel can be single-speed, dual-speed, or VFD-controlled
Integrated limit switches and travel sensors for safety

5.Trolley travelling mechanism

1)Trolley Travel Motor
Type: Squirrel cage induction motor or brake motor
Power Rating: Typically 0.8 kW to 4 kW (depending on trolley size and load)
Brake: Integrated electromagnetic brake or external disc brake
Optional: Variable Frequency Drive (VFD) for smooth speed control
2)Gearbox
Design: Compact helical gear reducer, high-efficiency
Function: Reduces motor speed and transmits torque to drive wheels
Mounting: Directly coupled to travel wheels or via shafts
3)Travel Wheels
Material: Forged steel or cast steel, heat-treated
Quantity: 4 or 8 wheels, depending on load capacity and wheelbase
Mounting Surface: Runs on rails mounted on the top flanges of both main girders
4)Travel Mechanism Configuration
One side driving, one side idle (for light-medium trolleys)
Dual-motor drive (for heavy-duty open winch trolleys)
Travel direction: Perpendicular to the crane's main travel (across the span)
5)Limit Switches & Control
Trolley limit switches: Prevent over-travel at the ends of the girders
Control Modes: Pendant, radio remote, or cabin control

6.Crane wheel

1)Material & Manufacturing
Made from high-strength alloy steel such as 42CrMo or 65Mn
Forged and heat-treated for maximum hardness, impact resistance, and durability
Surface hardness typically reaches HB300–HB400 for long-term wear resistance
2)Design Options
Single-flange, double-flange, or flat tread designs available depending on the rail and application
Precision-machined wheel tread and flange ensure stable tracking and minimal deviation
3)Mounting & Assembly
Mounted on high-grade axles or shafts with self-aligning roller bearings
Integrated into the end carriages and trolley frames
Designed for easy removal and replacement during maintenance
4)Wheel Configuration
Usually 4 or 8 wheels per crane (depending on load capacity and design)
Can include driven wheels (connected to motors) and idler wheels for guidance and support

7.Crane Hook

The crane hook is the primary load-handling component of a double girder overhead crane, designed to secure, lift, and move heavy loads with precision and safety. As the final connection point between the hoisting system and the material being lifted, the crane hook is engineered for strength, reliability, and operational safety in even the most demanding industrial environments.

8.Motor

1)Hoisting Motor
High-torque, squirrel cage or slip-ring motor
Designed for frequent starts/stops and heavy lifting
Often paired with brake system and gearbox for precise control
Available in single-speed, dual-speed, or variable frequency drive (VFD) options
2)Trolley Traveling Motor
Compact, energy-efficient motor for lateral (cross-travel) movement
Features soft start and braking for smooth motion
Integrated with gearbox for torque optimization
3)Crane Traveling Motor
Heavy-duty motor designed for longitudinal movement of the crane
Can be equipped with VFD for smooth acceleration/deceleration
High thermal class for continuous operation

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9.Sound and light alarm system & limit switch

To ensure maximum safety and efficient operation, modern double girder overhead cranes are equipped with an advanced sound and light alarm system and limit switches. These components are essential for warning, protection, and automatic motion control - reducing risks during crane movement and lifting operations.
1) Sound and Light Alarm System
The sound and light alarm system serves as a critical visual and audible warning device, alerting nearby personnel during crane operation, especially in large or noisy industrial environments.
2)Limit Switches
Limit switches are safety control devices that automatically stop crane movement or lifting at predefined endpoints. They prevent overtravel, overlifting, or dangerous collisions, ensuring the longevity of the equipment and safety of personnel.

10.Safety Devices

1)Overload Limiter / Load Limiting Device
Prevents the crane from lifting loads beyond its rated capacity
Automatically stops hoisting if the load exceeds the preset threshold
Often integrated with a digital load indicator for real-time display
2)Lifting Limit Switch (Upper/Lower Limiters)
Stops the hoisting motion when the hook reaches maximum or minimum safe height
Prevents hook overtravel, which could damage the hoist or rope system
3)Travel Limit Switches (Trolley & Crane)
Installed at the end of trolley and crane runways
Automatically stops travel motion to avoid collisions or derailment
4)Emergency Stop Button
Located on the pendant control, cabin, or remote control
Instantly cuts power to all crane operations in case of emergency
5)Motor Overheat Protection
Temperature sensors in motors detect overheating
Automatically shuts down the system to prevent motor damage

11.Control Mode

1)Pendant Control (Wired Control)
A handheld control unit suspended from the crane or trolley by a cable
Operators walk with the load and control the crane via pushbuttons
Simple, cost-effective, and easy to use
Ideal for short-distance or ground-level operations
2)Wireless Remote Control
Operated via radio frequency (RF) or infrared wireless signals
Provides freedom of movement for the operator - enhances visibility and safety
Minimizes the risk of cable entanglement or damage
Great for hazardous, outdoor, or large span applications
3)Cabin Control (Operator Cab)
A fixed or movable cabin installed on the crane bridge
Operator sits inside and controls the crane via joystick or control panel
Offers comprehensive visibility and control for complex or heavy-duty operations
Common in steel plants, shipyards, or container terminals
4)Automatic / Semi-Automatic Control (Optional Advanced Mode)
Pre-programmed paths and sequences using PLC-based automation
Integration with warehouse or production line systems
Enables unmanned operation, reducing labor cost and increasing precision
Often used in smart factories or material handling systems

12.Sketch

Main technical

1. Higher Load Capacity
Supports heavier lifting loads, typically from 5 tons up to 500+ tons
Dual girders allow even weight distribution, improving structural integrity
Suitable for large-scale manufacturing, metallurgy, shipyards, and logistics hubs
2. Greater Span & Hook Height
Can accommodate longer spans and higher lifting heights
Offers more usable space between the hook and the floor
Maximizes facility space utilization for large or bulky items
3. Strong and Rigid Structure
Features two box-type girders for enhanced rigidity and stability
Reduces deflection under load, resulting in smoother and safer operation
Designed for long-term durability under frequent or intensive use
4. Precision and Control
Supports advanced features such as:
Variable Frequency Drives (VFD) for smooth motion
Anti-sway systems for load stability
Automatic positioning or semi-automation for accuracy
Allows safe and precise handling of fragile or valuable materials
5. Enhanced Safety Features
Equipped with comprehensive safety devices:
Overload limiter, limit switches, emergency stop, buffer systems, etc.
Sound and light alarms for operator and personnel safety
Optional safety enhancements: collision avoidance, anti-fall devices, and wind sensors
6. Flexible Customization
Can be tailored to specific operational needs:
Control mode (pendant, remote, cabin, or automatic)
Hoisting speed, travel speed, and crane span
Explosion-proof, corrosion-resistant, or weather-resistant versions

1. Heavy Manufacturing & Assembly
Ideal for lifting and positioning large machine parts, molds, dies, and components
Common in automotive, aerospace, and machinery production lines
Supports multi-shift, high-volume manufacturing operations
2. Steel & Metal Industries
Used in steel mills, foundries, and rolling plants
Handles molten metal ladles, steel coils, billets, and slabs
Can be equipped with specialized hooks, magnets, or lifting beams
3. Shipbuilding & Marine Yards
Essential for lifting large ship sections, engines, and equipment
Offers long spans and high lifting heights for wide vessel areas
Often used in combination with gantry cranes for outdoor work
4. Construction Materials & Precast Plants
Lifts and moves concrete beams, blocks, and panels
Ensures safe and efficient handling of bulky construction components
Suitable for both indoor factories and open-yard operations
5. Railway & Transportation Industry
Applied in train assembly plants, rail yards, and maintenance depots
Lifts locomotives, bogies, and heavy components for repair or assembly
Offers precision handling and safe maneuvering
6. Power Plants & Energy Sector
Used in thermal, hydro, and nuclear power plants
Assists in the installation and maintenance of turbines, generators, and transformers
Provides high-reliability lifting in critical environments
7. Warehousing & Logistics Centers
Automates material flow in large-scale warehouses or distribution hubs
Handles heavy pallets, large crates, or oversized goods
Can integrate with automated storage/retrieval systems (ASRS)

1. Design & Engineering
Customer Requirements Analysis
Load capacity, span, lift height, working class, environment, etc.
Mechanical & Electrical Design
3D modeling with CAD/CAE software
Structural analysis, FEM calculation, and layout optimization
Component Selection
Motors, gearbox, hoisting units, brakes, electrical parts from trusted brands
2. Raw Material Procurement
High-quality materials such as Q235B / Q345B steel for main girder fabrication
Certified and traceable materials for safety-critical components
Inspection and testing of incoming materials (chemical & mechanical properties)
3. Steel Structure Fabrication
Cutting: CNC flame/plasma cutting machines for high precision
Beveling & Drilling: Edge preparation and joint drilling
Welding: CO₂/MIG/MAG welding for main beams, end carriages, trolleys
Welds are tested by ultrasonic or magnetic particle inspection
Straightening: Hydraulic press for removing deformation
Assembly: Girder assembly with strict geometric dimension control
4. Surface Treatment
Shot blasting to Sa2.5 standard for rust removal
Epoxy or polyurethane painting
Primer + intermediate + finish coats (typically 80–120μm total thickness)
Optional: Zinc-rich or corrosion-resistant coatings for marine or outdoor use
5. Machining & Assembly
Machining of wheels, shafts, drums, and pulley groups for tight tolerances
Assembly of:
Crane wheels, end carriages, and coupling systems
Trolley frame with hoisting mechanism
Motor, gearbox, drum, hook, and rope guide
6. Electrical System Installation
Electrical cabinet assembly with Siemens/Schneider/ABB components
Installation of:
Limit switches, overload protectors, anti-collision sensors
Cables, festoon systems, and wireless remote systems
Motors with VFDs for smooth speed control (optional)
7. Inspection & Testing
Dimensional Inspection: Ensuring assembly accuracy
No-load Testing: Trolley travel, crane travel, hoisting function
Load Testing (usually 1.1–1.25× rated capacity):
Static & dynamic tests per national or CE standards
Electrical Testing: Insulation resistance, control logic, emergency stop
Safety Device Test: Limit switches, alarms, brakes, and interlocks
8. Packaging & Delivery
Disassembly of main components for shipping (as required)
Waterproof wrapping, anti-corrosion protection, and steel frame packaging
Custom packing for overseas shipment (container or bulk cargo)
9. Documentation & Handover
Includes:
User Manual
Quality Certificate
Load Test Report
Electrical Wiring Diagram
Maintenance Schedule
Optional: On-site installation supervision, commissioning & operator training

Workshop view:

The company has installed an intelligent equipment management platform, and has installed 310 sets (sets) of handling and welding robots. After the completion of the plan, there will be more than 500 sets (sets), and the equipment networking rate will reach 95%. 32 welding lines have been put into use, 50 are planned to be installed, and the automation rate of the entire product line has reached 85%.