Slewing Jib Crane

A slewing jib crane comprises a horizontal runway track (the jib arm) cantilevered out from a vertical 'king post' located in bearings. The king post and bearings allow the jib arm to slew. The lifting machine is usually mounted on a trolley which travels along the jib arm.

The combination of slewing and trolley movement means that the lifting machine can be placed to lift and move a load to virtually any position within the arc of slew. In other words, it allows a load to be moved in all three planes.

Slewing jib crane work intensity is light, and the crane is composed of an upright post device, rotary device, rotary arm device and chain electric hoist, the lower end of the column by the anchor bolts fixed in the concrete foundation, composed of a cycloidal pin wheel speed reducer to drive the rotary cantilever, electric hoist running back and forth on the main beam and lifting heavy objects. Crane boom is a hollow steel structure, light weight, large span, from the weight of large, economical and durable. The built-in type walking mechanism has characteristics of rolling wheel, small friction and brisk walking, because of adopting the special engineer plastic. What's more, the small size structure is especially beneficial to improve the hook stroke.

In principle, slewing jib cranes can be divided into two categories: pillar jib crane and wall-mounted jib crane. In addition to the hoisting movement, the slewing jib crane can also carry out a slewing movement. With the slewing crane, the upper part with the jib rotates about a vertical axis in relation to the lower part.

The pillar-mounted slewing cranes are designed for free-standing installation on the floor (outdoor installation or hall installation) and offer the following advantages thanks to their design features:

• Large 360° swivel range
• Stable floor mounting or console mounting (outdoor and indoor)
• Loads up to 500kg possible
• Projection of the swivel arm up to 2000 mm

The wall-mounted slewing crane, on the other hand, is designed for mounting on a wall or support. For this purpose, the slewing crane is mounted on a wall mounting bracket and offers the following advantages:

• Ground clearance thanks to wall mounting
• High payloads thanks to inclined strut
• Projection of the swivel arm up to 2000 mm
• For indoor and outdoor use

• Thanks to the counterweight integrated into the crane base, the crane is completely independent. Neither any fastening to the foundation nor any dowelling of the crane on the concrete floor is required.
• Versatile transport possibilities: Crane trolley, fork lift, or overhead crane (all optional)
• Infinite slewing by 360° thanks to power supply by slip-ring assembly
• Especially easy slewing operation thanks to sophisticated ball bearing with pivot resistance regulator as standard feature
• Small stop clearance for maximum utilisation of effective outreach
• Compact design, perfectly suited for small rooms and installation on machines
• Large effective lifting height
• Column height and jib arm length can be adjusted to conditions on the spot
• Standard jib locking devices as a transport lock

1. Increased Reach and Flexibility

A jib crane is a powerful asset! Its Increased Reach and Flexibility grant it an unlimited range of motion, so you can move loads around with impressive accuracy – much further than rigid cranes allow. With this tool at your disposal, there's no limit to the potential jobs that can be accomplished!

2. Improved Safety and Ergonomics

Investing in a jib crane is essential for any business looking to optimise operations and keep their workers safe. By providing adjustable heights, omnidirectional movement capabilities, and quick loading of materials, these innovative cranes help reduce the risk of injury while assisting employees in finishing tasks efficiently and cost-effectively. Plus, the long-term financial savings are undeniable!

3. Increased Loading and Unloading Efficiency

With proper maintenance, inspections and trained operators, the performance of jib cranes can reach its optimal level. For additional efficiency gains, consider customising or adding attachments to your crane to access hard-to-reach places better or handle various materials. This customisation could enable faster loading and unloading times while keeping safety in mind.

4. Improved Precision and Control

By combining a pivoting boom with advanced control systems, operators can easily manoeuvre the crane's load in specific directions while benefitting from features such as variable speed control and programmable movement patterns. To further ensure safe operation, many jib cranes come equipped with sophisticated load-sensing systems that continuously monitor any task's progress to guarantee reliable performance.

Mast Components

The mast is the vertical beam upon which the components of a jib crane rest. They are found in the majority of jib cranes except for wall mounted, wall traveling, column mounted, and ceiling mounted ones. The mast is made of high strength steel and is firmly secured to the floor or walls of a building. They have a sufficient amount of clearance to avoid interference with other processes but can be high enough to be supplemented for overhead cranes or be coordinated with other operations.

Jib Crane Boom

The boom is the major weight bearing portion of any type of jib crane. It extends out from the mast, wall, ceiling, or a column and is a horizontal beam that is perpendicular to the floor. Contained on the boom is the hoist that is used to lift and move the load. For some versions of jib cranes, the boom is the support along which a trolley moves as it transports a load.

Hoist in a Crane

The hoist is the mechanism that is attached to the boom and does the lifting for a jib crane. The lifting medium and power source are the factors that define a hoist. There is an endless number of hoists for crane systems with each type designed to fit the requirements of an application. Some of the types of hoists are chain, wire rope, and lever or ratchet. Another distinguishing factor for hoists is their power source, which can be manual, electrical, or pneumatic.

Crane Trolley

The trolley is the motorized method for moving the hoist horizontally along the top or underside of the boom. Trolleys can carry wire rope or chain hoists with a hook attached. They are designed to move the entire length of the boom and are held immovable as the hoist lifts the load. The organization of the cable power supply of a trolley is completed by a festoon system that is a series of trolley like rollers or holders that holds the power cables and follows the path of the trolley.

Festoon System

A festoon system carries cables and power to the trolley along with the boom. There are many types of festoon systems that offer safety and control of power cables. Festoon systems can travel on a C track, square rail, or I beam, which is most common for jib cranes. They protect cables from wear and provide direct contact for components of a jib crane. Festoon systems are mostly used for jib cranes with long booms and heavy duty trolleys.

Assess the Weight Capacity Required

It is important to determine the maximum weight that needs to be lifted. Jib cranes are available with capacities ranging from a few hundred pounds to several tons. In addition to the weight of the material, the weight of the hoist and the gripping equipment (suction cup assembly with its structure, tipping accessories, etc.) must be taken into account. It is important to provide an adequate safety margin (at least 15-20%) to avoid any possibility of overloading, with potential safety hazards for equipment and personnel.

Assess the Range of Action

Carefully consider the crane's outreach (radius), the horizontal coverage space and the vertical excursion needed to operate easily in relation to the equipment and vehicles to be served. Measure the distances and heights required to easily lift and manoeuvre the load over pallets and above the floor of the transport equipment, calculating the overall dimensions of the hoist, hook and vacuum devices. Ensure that the crane selected provides adequate maneuverability and coverage.

Manual or Electric Rotation and Translation

In addition to manual rotation and traslation, many jib crane models offer the option of electric handling, both for rotation of the jib and for travel along the trolley arm to which the hoist and vacuum gripping system are attached. These systems further reduce operator fatigue and allow particularly "smooth" and fluid handling of materials in the presence of large inertial masses. They are also useful when handling particularly fragile materials to avoid manual pulling.

Hoist Selection

The hoist plays a key role in lifting and vertical load handling. It must have a capacity at least equal to that of the crane and provide sufficient travel to meet the requirements of the work environment. Electric hoists, also available with two speeds and possible drive ramps, are the most popular choice due to their convenience and ease of use.

Lubrication: Regularly applying high-quality lubricants to the moving parts such as bearings, gears, and joints helps reduce friction, prevent wear and tear, and extend the crane's lifespan. It is advisable to follow the manufacturer's guidelines regarding lubrication frequency and the type of lubricant to use.

Inspection and Testing: Inspect the crane's structural components, including the boom, mast, and base, for any signs of damage or deformation. Check the electrical connections, control panels, and safety features to ensure they are functioning properly. Additionally, perform load tests to verify the crane's load capacity and stability.

Electrical System Maintenance: The electrical system of a floor-mounted jib crane demands particular attention. Regularly inspect the wiring, connectors, and switches for signs of damage or loose connections. Ensure that the power supply is stable and meets the required voltage and amperage specifications. If any electrical components show signs of malfunction, they should be repaired or replaced promptly by a qualified electrician.

Safety Devices: Check the functionality of safety devices, including limit switches, emergency stop buttons, and overload protection systems. These devices are designed to prevent accidents and protect both operators and equipment. Regularly test and calibrate them to ensure proper operation.

Structural Integrity: Over time, the structural components of a jib crane may experience stress and fatigue. Inspect the crane's weld joints, bolts, and fasteners to ensure they are secure and undamaged. Look for signs of cracks, deformations, or excessive wear. If any structural issues are detected, consult with a professional engineer or the crane manufacturer to determine the necessary repairs or replacements.

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