Special Grab Overhead Crane (KMESG)

Description×

The Special Grab Overhead Crane (KMESG) is designed for loading and unloading operations involving bulk, loose, and lump materials. The equipment is widely used in the metallurgical, mining, power generation, and processing industries, as well as at storage and transshipment facilities for handling coal, ore, crushed stone, sand, and scrap metal.

KMESG cranes are equipped with permanently mounted rope-operated grab buckets that form an integral part of the crane system. The grab bucket is a specialized lifting attachment with movable jaws. The opening and closing of the jaws are controlled by ropes connected to the crane's hoisting winches.

Depending on the application and the characteristics of the material being handled, the crane can be equipped with various types of grab buckets. By design, grab buckets may be classified as two-jaw, multi-jaw, or tong-type. Based on the number of ropes, they may be two-rope, three-rope, or four-rope configurations. For two-jaw four-rope grab buckets, the jaws may open either longitudinally or transversely relative to the crane ropes.

The grab bucket design is selected individually according to operating conditions and cargo characteristics. Depending on the application, standard (surface-operation) or underwater versions (for handling materials below water level) may be used, as well as digging or raking-type designs. Digging grab buckets provide effective penetration into compacted and consolidated materials, while raking grab buckets are designed for efficient collection of materials distributed in a thin layer across a surface.

Upon customer request, special grab overhead cranes can be equipped with an automation system based on a Programmable Logic Controller (PLC). Automation significantly simplifies crane operation, minimizes the impact of human error, and ensures consistent productivity regardless of operator skill level.

The automation system may provide grab position monitoring, automatic jaw opening and closing, as well as specialized material-filling algorithms for the grab bucket. An integrated diagnostic system is also available, facilitating maintenance and troubleshooting.

The equipment is designed for operation in ambient temperatures ranging from -40°C to +40°C. Upon special request, cranes can be manufactured for an extended temperature range of -60°C to +80°C. Cranes and grab buckets are available in U, UHL, T, and M climatic versions with placement categories 1 and 2 in accordance with GOST 15150-69.

The warranty period is 12 months from the date of commissioning, but no more than 18 months from the date of manufacture, provided that operating conditions and the specified service life requirements are observed. When a crane is supplied together with installation services, the warranty period is extended to 24 months.

Since 2008, Gruzopodyom Plant has provided a full-cycle manufacturing process for lifting and material-handling equipment. Our services include engineering, manufacturing, delivery, installation, and after-sales support. The company operates a multi-stage quality control system, including three accredited laboratories.

Each Special Grab Overhead Crane is engineered individually in accordance with the properties of the handled material, operating conditions, required productivity, and duty classification, in compliance with TU 28.22.14-020-87879481-2026. This approach ensures reliable and efficient solutions tailored to the specific production requirements of each customer.

Note

The KMESG crane belongs to the category of special-purpose overhead cranes and is designed for continuous operation with a grab bucket. If the technological process requires periodic replacement of the lifting attachment and the performance of different lifting operations, we recommend considering a general-purpose overhead crane capable of accommodating interchangeable attachments such as grab buckets, lifting beams (spreader beams), electromagnets, or other auxiliary equipment.

The requirement for auxiliary lifting attachments should be communicated to the manufacturer at the inquiry stage, as their use affects the crane's structural design and technical characteristics.

Specifications×

Scope of delivery×

List of Additional Options×

By default, cranes are manufactured in standard configuration. However, depending on their technical specifications and operating conditions, the factory manager may recommend enhancing the standard configuration with a set of additional options. Below is a brief description and rationale for their installation.

Option Name	Option Description
Load Limiter	Serves as an additional safety device alongside limit switches and the phase failure protection system. Typically installed when working with various loads of unknown weight. If the load exceeds the hoist’s rated capacity, the limiter blocks the lifting process. Available for cranes equipped with an electric hoist, as it is mounted on the hoisting mechanism.
Sound and Light Alarm	Activates when the bridge crane is turned on, warning staff to leave the hazardous area. Depending on site conditions, either sound or light alarms are recommended. Available only for electric bridge cranes.
Radio Control	Enables crane operation from a distance via remote control. Available for electric bridge cranes or cranes with electric hoists. Includes a 6-button remote with emergency stop, radio signal receiver (installed on the hoist, control panel, or next to it).
Motor with Brake for Crane Travel	Used to fix the electric bridge crane in a stationary position. Prevents unintentional movement caused by wind, seismic activity, etc.
Hoist Parking Shelter for Outdoor Use	For cranes in climate category U1 (outdoor), protects the electric hoist from direct precipitation. Recommended by crane and hoist manufacturers, as hoist designs typically lack built-in weather protection.
Full Span Hoist Shelter for Outdoor Use	For cranes in climate category U1 (outdoor), protects the electric hoist along the entire bridge span from direct precipitation. Also recommended due to lack of built-in weather protection.
Travel Limit Switch for Crane Movement Along Rails	Performs the same function as mechanical bumpers, but as a sensor that stops the crane upon contact, avoiding collision of metal parts. Available for electrically powered cranes. Includes 1 limit switch and mounting hardware.
Trolley Travel Limit Switches Along the Bridge	Prevent the hoist from reaching the end beams, reducing collision risks and prolonging hoist service life. Includes 2 switches and mounting hardware.
Obstacle Proximity Sensors	Prevent crane collision with obstacles or other cranes on shared runway tracks. Recommended: 2 sensors for bridge cranes, 4 for suspension cranes.
Phase Failure Load Protection	Additional safety device alongside load limiters and limit switches.
Crane Operation Data Recorder	Records operating conditions of the crane — modes, duration, and load levels. Available only for cranes with electric wire rope hoists.
Crane Runtime Indicator	Monitors crane operating time to ensure timely maintenance and repairs. Installed inside or on the control panel door.
Frequency Regulation of Crane Travel	Frequency inverter installed in the control panel allows for adjustable crane travel speed within a specified range.
Motor Cooling System	Recommended with frequency inverters that limit standard crane travel speeds to prevent motor overheating.
Input RL Filter	Required when the crane or hoist is powered by a conductor rail. Requires additional installation of a frequency inverter.
Heated Crane Control Panel	Allows operation at ambient temperatures down to -20°C. Mandatory for cranes used below -10°C. Requires a frequency inverter.
Anti-Sway System	Reduces load swinging during crane travel along the longitudinal or transverse axes.
LED Under-Crane Lighting	Provides an illuminated area beneath the crane span.
Wheel Alignment System	Increases wheel service life by reducing flange-to-rail head friction.
Centralized Lubrication System for Bearings	Reduces bearing wear by supplying lubricant.
Centralized Rail Flank Lubrication System	Reduces rail wear by lubricating the rail sides, eliminating dry friction between rails and wheel flanges. Prevents surface scoring.
Power Supply to the Crane	Provides power to the crane along the runway.