LDC European Electric Single-Girder Crane
The LDC-type European-style electric single-girder crane features a low-headroom, compact European design paired with a European-style electric hoist, reducing dead weight by 20–30% compared to traditional LD-type cranes. The main girder cross-section is optimized through FEA to minimize steel usage while maintaining strength and stiffness. A hardened gear reducer and variable-frequency speed control system come standard, delivering smooth operation and precise positioning. Kelude's LDC European series covers lifting capacities from 1 to 16 tons with spans of 7.5 to 25.5 m, ideal for material handling in workshops and warehouses.
The LDC-type European-style electric single-girder bridge crane is designed to work with the HDHa-type European electric hoist. Built on modular design principles and advanced computer-aided engineering, this crane incorporates imported components, premium materials, and modern manufacturing processes. The result is a lightweight, versatile, energy-efficient, and low-maintenance single-girder crane that represents a significant upgrade over conventional general-purpose bridge cranes.
Performance Features & Design Benefits
Lightweight with Reduced Wheel Loads: Modular design and FEA-driven topology optimization of the main girder, end carriages, and trolley frame minimize steel consumption while preserving strength and rigidity. Extensive use of high-strength steel (Q355B/Q420B) reduces dead weight by 15–30% compared to traditional LDA-type single-girder cranes, and lowers maximum wheel loads by 10–35%. This eases the load-bearing requirements on runway beams and columns, cutting factory construction costs.
Compact Dimensions for Maximum Space Utilization: Minimal hook approach distances to both sides of the runway allow a larger working envelope. The low headroom above the rail enables equivalent lifting heights in lower-profile buildings. This space-efficient design is particularly advantageous for retrofit projects with restricted vertical clearance.
Smooth Operation with Precise Positioning: A variable-frequency speed control system (VFD on hoist, long travel, and cross travel) comes standard with a 1:10 speed ratio, automatically reducing speed under heavy loads and enabling fast travel with light loads. Combined with an electrical anti-sway control system, load sway at stop is kept within ±50 mm, enabling high-accuracy positioning and boosting operational efficiency by approximately 15–20%.
Maintenance-Free Design: The gearbox features hardened and ground gears (Grade 6 accuracy) pre-filled with long-life synthetic lubricating oil. Wheels are forged steel with induction-hardened treads (HRC 45–50). The hoisting mechanism uses a steel drum and heavy-duty brake. Designed for a service life of 20+ years, the total lifecycle maintenance cost is roughly 30% lower than that of conventional cranes.
Manufacturing Standards: Design, manufacturing, and inspection comply with GB/T 3811, GB/T 14405, and JB/T 1306, with reference to FEM, DIN, and IEC international standards. Major purchased components are sourced from reputable domestic and international brands, ensuring high overall reliability.
Key Upgrades Over Traditional Single-Girder Cranes
Compared to the LDA-type conventional single-girder crane, the LDC European model delivers comprehensive improvements across the board:
- Structural Optimization: The main girder uses an optimized box section or H-beam, with FEA precisely controlling stress distribution. Dead weight is reduced by 15–30% while stiffness meets GB/T 14405 requirements (mid-span deflection ≤ L/800; residual deformation after static load test ≤ L/2000).
- Upgraded Drive System: All gearboxes use hardened and ground gears (HRC 58–62) with a transmission efficiency of ≥95%, extending service life by 2–3 times over traditional soft-flank reducers.
- Energy Savings: Total installed power is reduced by approximately 15–20%, and the VFD system saves 20–30% energy compared to fixed-speed operation. Based on 8 hours of operation per day, annual electricity savings range from roughly $450 to $1,200 depending on capacity and work duty.
- Enhanced Safety: Standard safety features include an overload limiter (110% alarm / 125% hoist circuit cut-off), travel limit switches on all motions, an Emergency Stop Button, phase-loss/overload protection, and zero position protection, all compliant with GB/T 28264 and TSG Q7016.
Selection Parameter Table
| Lifting Capacity(T) | Span LK(m) | Lifting Height H5(m) | Lifting Speed(m/min) | Complete Machine Power(kw) | Complete Machine Dead Weight(t) |
|---|---|---|---|---|---|
| 2T | 7.5~28.5 | 6/9/12 | 0.8/5 | 4.7 | 1.65~7.75 |
| 3T | 7.5~28.5 | 6/9/12 | 0.8/5 | 4.7~5.1 | 1.75~7.95 |
| 5T | 7.5~28.5 | 6/9/12 | 0.8/5 | 7.75~8.85 | 2.15~9.55 |
| 6T | 7.5~28.5 | 6/9/12 | 0.8/5 | 7.75~8.85 | 2.75~10.75 |
| 10T | 7.5~28.5 | 6/9/12 | 0.8/5 | 12.1~13.6 | 2.75~12.05 |
Technical Parameters & Custom Options
Work Duty / Classification: A3–A5 (higher classifications available upon request based on operating conditions).
Ambient Temperature: -20°C to +40°C (high-temperature or -40°C low-temperature configurations available as options).
Power Supply: AC 380V / 50Hz standard (AC 220V, AC 415V, AC 660V and other special voltages available on request).
Control Mode: Floor pendant control / wireless remote control / operator cabin (optional).
Hoisting Mechanism: Equipped with HDHa European-style electric hoist (CD1/MD1 wire rope hoist or chain hoist available as alternatives).
Long Travel / Bridge Travel: Individually driven or centrally driven; wheel diameter Φ200–Φ500 depending on capacity and span.
Crane Rail: P18 / P24 / P30 / P38 (selected based on calculated wheel load).
Technical Note from Kelude's Lead Engineer
"The LDC European-style single-girder crane offers excellent value for money. Take a recent project supplying 10 units of LDC5-16.5m to a building materials wholesaler — the customer previously used LD-type cranes with a dead weight of approximately 3.8t per unit. After switching to the LDC series, dead weight dropped to 2.7t (a 29% reduction), eliminating the need to reinforce the H-beam roof structure. The inverter drive also cut operating noise from 78dB down to 65dB, which operators have clearly noticed. Overall, the 10 cranes saved the customer roughly $26,600 in avoided structural reinforcement costs."
— Zhang, Senior Engineer, Kelude Technical Department
Main Structural Components
The LDC European-style electric single-girder crane consists of the following key components:
- Main Girder: Optimized box-section or H-beam design in Q355B or Q420B steel plate. All weld seams undergo non-destructive testing in accordance with GB/T 3323. After welding, the girder is shot-blasted (Sa2.5) and finished with epoxy zinc-rich primer plus acrylic polyurethane topcoat (total film thickness ≥120μm).
- End Carriage: Welded steel plate construction with driven and idler wheel blocks. Wheels are made of ZG50SiMn cast steel or 45# forged steel, with induction-hardened tread surfaces to HRC 40–50. End carriages are joined using high-strength bolts (Grade 10.9), ensuring easy installation and precise shaft alignment.
- Electric Hoist: HDHa European-style hoist with a conical rotor motor (Class F insulation, IP55 protection rating). Lifting speed is either two-speed or variable-frequency controlled. Wire rope conforms to GB/T 8918 with a safety factor of ≥6.
- Electrical Control System: The main control cabinet integrates a PLC and VFD, with a remote monitoring interface (Profinet / Modbus TCP) for data exchange with upstream MES/SCADA systems. Control cabinet is rated IP54.
Application Scenarios for the LDC Crane
The LDC European-style electric single-girder crane is widely used in the following applications:
- Workshop Material Handling: Raw material receiving, inter-process transfer, and finished goods dispatch in machining, assembly, and mold-making workshops. Lifting capacity 2–10t, spans 7.5–28.5m.
- Warehouse & Logistics: Loading/unloading and stacking in automated warehouses. Can be paired with a C-hook or other lifting spreaders for handling coils, sheets, and pipe sections.
- Factory Retrofits: For older facilities with limited headroom or insufficient runway beam capacity, the LDC's lightweight design and low wheel loads are a major advantage — a larger-capacity crane can often be installed without structural reinforcement.
- Lightweight Production Line Integration: Combines with KBK flexible cranes, jib cranes, electric flat cars, and other equipment to build a flexible material flow system.
Kelude Heavy Industry provides end-to-end services covering concept design, non-standard customization, manufacturing, installation, and TSG inspection. For special lifting heights, unusual spans, or demanding environments (anti-corrosion, explosion-proof, high-temperature), or if you need complementary products such as LX-type European electric single-girder suspension cranes or European-standard single-girder suspension cranes, contact our technical team for a tailored solution.
Kelude Heavy Industry · Material Handling Solutions · Technical Consultation · Custom Quotation
Frequently Asked Questions
Q: What's the difference between the LDC and the LDX New-Chinese series?
A: The LDC is a compact European-style single-girder crane with an optimized box-section main girder and a European-style hoist. It offers low overall height and light dead weight, making it ideal for facilities with limited headroom. The LDX New-Chinese series builds on the LDC platform with further modular design and localized component sourcing — parts commonality exceeds 75%, lead times are shorter (15–20 working days for standard specs), and maintenance costs are lower. In short: the LDC leans toward European design, while the LDX is optimized for the domestic market.
Q: What are the power supply requirements for the LDC crane?
A: Standard configuration is AC 380V ±10%, 50Hz, three-phase four-wire. The control circuit operates at AC 36V (safety voltage). Export voltages including AC 220V, 415V, 460V, 500V, and 660V are available as options, and each unit is fully tested under power before leaving the factory. The VFD is designed to operate normally within ±15% voltage fluctuation.
Q: What is the warranty period and after-sales support?
A: The complete crane carries a 12-month warranty, with core hoist components (motor and gearbox) covered for 18 months. On-site installation and commissioning are provided free of charge nationwide. After-sales service responds within 24 hours, or 48 hours for remote areas. During the warranty period, non-artificial damage is repaired or replaced free of charge; after warranty expiry, paid lifetime repair service remains available.
Q: Can a remote control be added to the LDC crane?
A: A wireless remote control (430–470MHz, range ≥100m in open areas) and a wired floor pendant are both included as standard, providing dual backup. A second remote control or a master console can be added as an option. The remote control features an emergency stop button and a key switch, complying with GB/T 5226.2 safety standards.
