The KSQ series bridge crane is designed and manufactured in compliance with the latest national standards, while also incorporating international norms such as FEM, DIN, and IEC. It meets GB regulations and holds ISO and CE certifications. The crane provides smooth and precise lifting and traveling speeds.

Compared to conventional QD-type bridge cranes, the KSQ model offers a weight reduction of approximately 15–30% and reduces maximum wheel pressure by about 10–35%. This lowers the demands on workshop structures and reduces overall costs. Key components include a hard-tooth-surface, high-precision reducer gear set, forged wheels, and a variable-frequency speed control system, making this crane an upgraded alternative to traditional general-purpose overhead cranes.

Design Standards

1. GB/T 10183-2005 – Manufacturing tolerances for overhead and gantry cranes  

2. GB/T 5905-1986 – Crane testing specifications and procedures  

3. JB/T 4315-1997 – Electrical control equipment for cranes  

4. GB 8918-2006 – Wire ropes for critical applications  

5. GB/T 700-2006 – Carbon structural steel  

6. GB/T 1591-2008 – High-strength low-alloy structural steel  

7. JB 928-1994 – Radiographic inspection of welded joints  

8. GB 11345-1989 – Manual ultrasonic testing of steel welded joints  

Structure & Performance

The double-girder overhead crane consists of a double-girder frame, end trucks for crane travel, and a top-running trolley with lifting and traveling mechanisms. Motors, reducers, and brakes are independently arranged, enabling a wider working duty range (A3–A8 per ISO) and higher lifting/traveling speeds.  

Speed is adjustable across 10 grades, allowing very slow movement for precise operations.

Safety Features

1. Overload protection – only lowering motion is permitted when overloaded  

2. Travel limits – preliminary and final limit switches or infrared anti-collision devices  

3. Anti-falling protection for trolley and crane motors  

4. Emergency stop switch at the control station  

5. Polyurethane buffers at trolley and crane travel ends  

6. Safety hook latch to prevent load slippage  

7. Audible and visual travel alarms  

8. Rain covers for outdoor crane lifting mechanisms, electrical cabinets, and drives  

9. Standard protective earth conductor  

10. Undervoltage protection  

11. Current overload protection (contact us for further details)

To better serve you, please provide the following:

- Lifting capacity  

- Span (rail center to rail center)  

- Lifting height (lowest point to ground)  

- Power supply (default: 380V, 50Hz, AC, 3-phase – confirm if suitable)  

- Working conditions: material to be lifted and ambient temperature