| Customization: | Available |
|---|---|
| After-sales Service: | 24 Hours on Line, Video/Site Guidance |
| Warranty: | 1 Year |
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
|---|
| Payment Methods: |
|
|---|---|
| Support payments in USD |
| Secure payments: | Every payment you make on Made-in-China.com is protected by the platform. |
|---|
| Refund policy: | Claim a refund if your order doesn't ship, is missing, or arrives with product issues. |
|---|
Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
Item | QD Double-Girder Overhead Crane | LD Single-Girder Overhead Crane | Technical Notes / Application Suggestions |
Applicable Scenarios | Heavy industry, metallurgy, large assembly lines, energy equipment | Workshops, warehousing, auxiliary lifting, light-duty material handling | QD is suitable for frequent, heavy-duty, high-intensity usage |
Rated Lifting Capacity | 5t ~ 320t (customizable) | 1t ~ 20t (customizable) | QD supports a wider capacity range for large loads |
Span Range | 7.5m ~ 40m | 7.5m ~ 31.5m | Both support customization to match workshop layout |
Lifting Height | 6m ~ 30m (extendable) | 6m ~ 20m(extendable) | Customized based on lifting requirements |
Lifting Speed | 5~15 m/min (based on capacity and hoisting type) | 8/0.8 m/min or 7/0.7 m/min (dual-speed CD/MD hoists) | QD adopts rope drum hoists with customizable speed control |
Trolley Speed | 20~40 m/min (VFD optional) | 20 m/min (standard) | QD has independent trolley drive for smoother travel |
Crane Travel Speed | 40~100 m/min (often VFD-equipped) | 20~30 m/min | QD supports higher speed and large-span transfer efficiency |
Speed Control | VFD / fixed-speed options, soft start supported | Mostly fixed speed, some dual-speed or basic VFD | QD supports precise control; LD is more cost-effective |
Speed Adjustment | Multi-speed or stepless adjustment available | Usually single or dual speed (CD/MD) | QD ideal for precise positioning; LD for economical use |
Duty Classification (GB/T 3811) | A3 ~ A7 (A5 or above recommended for heavy-duty use) | A3 ~ A5 (suitable for light to medium frequency) | Higher duty means better durability and working cycles |
Main Girder Structure | Welded box-type double girder (high strength) | I-beam or welded box-type single girder | QD offers superior torsional and bending resistance |
Hoisting Mechanism | Trolley with rope drum hoist | Integrated CD/MD wire rope electric hoist | QD provides better stability and maintainability |
Drive System | Three-in-one geared motor with optional VFD | Standard motor drive, optional basic VFD | QD suits frequent starts/stops and long travel distances |
Control Methods | Pendant control / Wireless remote / Cabin operation | Pendant / Remote / Combined control | Flexible operation methods available |
Power Supply | AC 3-phase 380V 50Hz (customizable for export) | AC 3-phase 380V 50Hz (international standards supported) | Voltage and frequency customizable for export markets |
Installation Type | Dual-rail crane traveling system | Single-rail operation with flexible runway layout | QD requires higher rail precision |
Typical Applications | Foundries, wind tower plants, boiler manufacturing, heavy machining | Hardware plants, small equipment handling, packing lines, routine lifting | QD serves as primary lifting equipment, LD as auxiliary |
){kind=link}