Product Overview
The QD type double girder bridge crane is a general-purpose, heavy-duty lifting device designed for high-load industrial environments. Compared with the LD single girder bridge crane, this model adopts a double girder structure and a winch-type lifting trolley, offering higher lifting capacity, larger span, stable operation, and precise positioning, which allows it to adapt to a wider range of working scenarios.
The QD bridge crane manufactured by Yufei has a rated lifting capacity of 5 to 100 tons and a working class of A5 to A6. It can not only handle routine medium-duty tasks but also adapt to continuous, high-intensity production rhythms, and is widely used for loading, unloading, and transporting tasks in factories, mines, workshops, warehouses, freight yards, and other locations.
Product Specifications
|
Model |
QD type |
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|
Lifting capacity |
t |
5 |
10 |
16/3.2 |
20/5 |
32/5 |
50/10 |
75/20 |
100/20 |
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|
Max. lifting height |
Main lifting |
m |
16 |
16 |
16 |
12 |
16 |
12 |
20 |
22 |
|
|
Aux. lifting |
m |
18 |
14 |
18 |
16 |
22 |
22 |
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|
Span |
m |
10.5-31.5 |
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|
Lifting speed |
Main lifting |
A5 |
m/min |
11.3 |
8.5 |
7.9 |
7.2 |
7.5 |
5.9 |
6.1 |
3.9 |
|
A6 |
15.6 |
10.4 |
10.7 |
9.8 |
9.5 |
7.8 |
6.1 |
4.9 |
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|
Aux. lifting |
14.6 |
15.5 |
15.5 |
10.4 |
7.2 |
7.2 |
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|
Trolley traveling speed |
m/min |
37.2 |
43.8 |
44.6 |
44.6 |
42.4 |
38.5 |
38.4 |
33.86 |
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|
Crane traveling speed |
A5 |
m/min |
89.8(91.8) |
89.8(91.9, 84.7) |
84.7(87.6) |
84.7(87.6) |
87.6(74.2, 74.6) |
74.6 |
65 |
65.7 |
|
|
A6 |
92.7(93.7) |
92.7(93.7, 86.5) |
76(89) |
76(89) |
89(75.3) |
75(76.6) |
66.2 |
65.7 |
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|
Power |
3P 380V 50Hz or others |
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Product Feature And Application
Core Features of QD double girder overhead crane
Strong Structure and High Lifting Capacity
It uses a welded box-type double girder structure, providing excellent overall rigidity. The lifting capacity usually covers 5 tons to 100 tons, and larger capacities can be customized upon request. The double main girder design allows the crane to achieve larger spans and lifting heights, easily adapting to industrial buildings of different sizes.
Smooth Operation, Suitable for Frequent Use
The hoisting mechanism and trolley travelling mechanism both use high-quality motors and gearboxes, and can work with inverters. This ensures smooth starting and braking, effectively reducing load swing. The crane has a work duty of A5 or A6, enabling it to safely handle medium to heavy frequent daily lifting. It is a reliable and durable workshop crane.
Complete Safety Protection
Standard configuration includes an overload limiter, upper and lower limit switches, travel limit switches for the crane and trolley, buffers, and an emergency stop switch. For outdoor applications, windproof rail clamps, rain covers, etc. can be added. These safety devices allow the overhead crane to operate stably in different industrial environments.
Flexible Control Methods
You can choose different control methods based on operating habits. Cabin: provides a wide view, suitable for medium and large workshops. Pendant control: simple operation, suitable for close-range work. Wireless remote control: safe operation, suitable for long-distance work. Flexible control methods improve material handling efficiency.
Easy Maintenance, Long Service Life
The crane adopts a modular design, making inspection, maintenance, and parts replacement convenient. Key components such as gearboxes, wire ropes, and pulleys are selected from durable brands, resulting in low failure rates. Simple daily maintenance ensures the double girder overhead crane works stably and reduces long-term operating costs.
Application Scenarios of QD double girder overhead crane
QD double girder overhead cranes are widely used for material lifting, transfer and assembly in various heavy industrial scenarios, including:
·Machinery manufacturing workshops, metal processing plants and forging workshops
·Mining facilities, warehouse yards and freight terminals
·Metallurgical plants, power stations and petrochemical workshops
·Bridge construction, shipbuilding and heavy equipment assembly sites
They are ideal for production lines with frequent lifting tasks, heavy single-piece loads, and high requirements for operation stability and positioning accuracy.
Product Details
Crane Main Girder
The main girder adopts a fully welded box-type structure and is made of Q235B or Q345B steel plate.
All main welds undergo non-destructive testing (NDT).
The design and fabrication of the main girder follow ISO standards.
Under normal operating conditions, the service life exceeds 20 years, and it can withstand long-term heavy-duty operation without deformation.
Crane End Carriage
The end carriage is an integrally welded structure, mainly made of Q235B steel plate, with strong torsional resistance.
It is standard-equipped with high-performance buffers, travel limit switches and anti-derailment devices.
It is connected to the main girder in a modular way, simplifying on-site installation.
Crane Trolley
Winch-type lifting trolley. The trolley consists of a frame, wire rope hoisting mechanism, gear reducer, brake and hoisting motor.
It is equipped with limit and overload protection devices.
It is suitable for long-time continuous lifting operations and heavy-duty conditions.
Crane Wheels
Crane wheels are usually made from high-strength forged steel, with the surface quenched to provide high hardness and wear resistance.
The wheel groups mostly use a double-flange design, which allows them to fit the rail well and prevent derailment. High-quality wheels ensure the long-term safe and smooth operation of the double girder overhead crane.
Crane Hook
The hook is forged from high-strength alloy steel, offering high strength and good toughness, and 100% of hooks pass non-destructive testing before delivery.
Depending on the lifting capacity, a single hook or double hooks are usually provided, and a standard anti-unhooking safety latch is fitted to prevent the sling from slipping off.
Crane Control System
Three control modes are provided: cabin control, pendant control and wireless remote control.
Different modes suit various working scenarios, making crane operation more convenient and safer.
Certifications & Factory Strength
International Certifications: ISO 9001, ISO 14001, ISO 45001 certified.
Factory Scale: Yufei Crane possesses 3 large-scale production workshops and 12 automatic welding production lines, with an annual output of over 2,000 overhead cranes and electric hoists.
Global Export Experience: Our lifting equipment has been exported to more than 40 countries, backed by a comprehensive portfolio of successfully delivered overseas projects.
Inspection Standards: Before delivery, every finished crane must undergo full load testing, no-load running tests, and safety performance inspections.
After-Sales Support
24-hour online multilingual sales & technical team
Lifelong low-cost spare parts supply for all sold cranes
Regular follow-up after delivery to track equipment running status
One-stop service: design drawing, production, inspection, packaging, shipping, after-sales guidance
FAQ
Q: How do I choose the right lifting capacity and work duty for my workshop?
A: First, determine the heaviest load you need to lift daily. The QD double girder overhead crane's capacity must exceed that weight, typically ranging from 5 tons to 100 tons. The work duty depends on usage frequency: choose A5 for moderate use with fewer lifting cycles per day, and A6 for continuous heavy-duty operation. Selecting the correct capacity and duty helps your industrial overhead crane run safely and avoid premature wear.
Q: Is the installation and commissioning of this double beam bridge crane complicated? Do I need professional engineers?
A: Installation is straightforward. The whole crane uses a modular design, so the main girders, end carriages, and trolley can be shipped separately and assembled on site. We provide detailed installation manuals and drawings. If needed, our professional engineers can go to your site to guide the installation and complete the commissioning, making sure your double girder overhead crane is ready for material handling as soon as possible.
Q: Can the crane motors adapt to our local voltage and frequency?
A: Absolutely. The standard configuration is typically 3-phase 380V/50Hz. However, we can customize the voltage and frequency according to your local power grid, such as 440V/60Hz or 415V/50Hz. All motors are high-efficiency industrial types, with insulation and protection grades that meet the long-term frequent use requirements of workshop overhead cranes.
Q: What are the wear parts on a double girder bridge crane, and how often do they need replacing?
A: The main wear parts include the wire rope, rope guide, brake friction pads, wheel groups, and electrical contacts. The wire rope's replacement interval depends greatly on usage frequency and load; a thorough inspection every 12 to 18 months is recommended, replacing it whenever wear exceeds the limit. Brake pads and wheels can often last several years but must have their thickness and wear checked regularly. Replacing these wear parts in time keeps your bridge crane running stably and maintains efficient material handling.
Q: Compared to a single girder crane, what advantages does the QD double girder overhead crane have?
A: The clearest advantages are in lifting capacity and working adaptability. The QD double girder structure offers capacities from 5 tons to 100 tons or higher, far exceeding normal single girder cranes. It provides better rigidity, larger spans, and higher lifting heights, with a work duty of A5 or A6. This makes it ideal for heavy and frequent workshop material handling. Additionally, the trolley can be equipped with double hooks for coordinated lifting, offering more functionality and a longer service life.
Q: Can this crane work in environments with high temperature, a lot of dust, or outdoors?
A: Yes, it can. With a customized protection scheme, the QD double girder overhead crane can handle various special working environments. For example, we can add high-temperature-resistant insulation for motors, dust-proof covers, sealed electrical cabinets, and windproof rail clamps and rain covers for outdoor use. After we understand your actual working conditions, we will provide the right protective configuration to keep your bridge crane running stably for the long term.
Q: What should be checked during routine daily maintenance of a double girder overhead crane?
A: Daily checks are simple and focus on these items: visually inspect the wire rope for broken wires or deformation; confirm the hook safety latch is in place and that the overload limiter and limit switches respond correctly; listen for unusual noise from the trolley and hoisting mechanism; check that the long travel and cross travel wheel groups fit the rails properly and fasteners are tight. These routine actions take only a few minutes and effectively ensure the double girder crane operates safely on each shift.
Q: What does after-sales service include? Are spare parts easy to get?
A: We offer complete after-sales support from factory delivery onward. The standard warranty covers key mechanical and electrical parts for more than 12 months. Spare parts like wheel groups, wire ropes, gearboxes, and brakes are available through our global logistics channels and can be delivered quickly. Our service team provides remote technical support and on-site repair,
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