Fully enclosed, sealed and heavy-duty protection for slewing bearings

The slewing bearings are packed according to the requirements. Liebherr offers various types of packaging, such as boxes made of high-quality and heat-treated hardwood and VCI film with suitable preservation for safe shipping.

Multiple use packaging: Environmentally friendly, lower carbon footprint

It is also possible to use a circulating packaging, if requested. This kind of packaging is designed to pack and transport slewing bearings repeatedly. The multiple use contributes to a greener environment.

The slewing bearings can be packed on a special transport pallet. This can be flexibly transported with a forklift truck. On request, they can also be packed in VCI film – depending on the coating, transport duration and transport route.

The packaging is designed to carry the full weight of the slewing bearing. The selected lifting device can be placed around the box at the marked points. In addition, it is possible load and unload the box by means of a forklift truck

The handling of the packaging takes place via the lifting points directly fitted to the slewing bearing. In order to save storage space, the boxes can be stacked. With different designs and sizes, Liebherr also offers a lightweight variant of this type of packaging.

This packaging combines the features of a carry-along and a load-bearing packaging. The box is designed for transport by forklift and sling around the box. In addition, attaching slings directly to the lifting points on the slewing bearing is possible, optimally also stacking of the boxes.

By adding additional desiccant and special VCI wrapping, it is possible to pack slewing bearings on a long-term basis. With an additional humidity indicator, the climate and relative humidity inside the packaging can be read.

Liebherr offers various conservation options to protect the slewing bearings from corrosion. A standard conservation can be between 3 and 6 months.For shipping overseas or planned storage slewing bearings can be conservated up to 36 months.

Additionally, a protected storage solution environment without high temperature fluctuations can contribute to a longer storage life.

Accurate calculations for absolute reliability in your application

To ensure maximum safety and a long service life of the slewing bearings , various load cases and specific requirements are calculated using the finite element analysis as early as the development and prototype phase.

Customers always benefit from the complex and long-standing know-how of the FEM-specialists at Liebherr. Our specialists are on hand as a reliable development partner and responds to individual requests.

Taking into account the application-specific companion structures, the slewing bearings are checked for various load cases using the FE Analysis calculation. This makes it possible to prevent unwanted influences based on the companion structure with regard to ring stresses and bolt stresses as well as deformations leading to leakage and to maximize safety for customers and their application.

Liebherr slewing bearings are calculated within the FE Analysis with all the necessary details. This results in various outcomes such as:

• Load distribution in slewing bearings
• Pressure distribution in all rolling elements
• Verification of static and dynamic load carrying capacity of bearing rings, bearing raceways and screw connections
• Edge hardness depth
• Behavior at the contact joints
• Deformations at the sealing gaps
• If required by the customer: Stresses and deformations in the adjacent construction

The numerous certifications are testament to Liebherr's high standard of quality. Aside from the usual ISO standards of the quality management system, Liebherr has the following certifications:

• DIN EN ISO 9001:2015
• EN 1090-2:2008+A1:2011; EXC3 in accordance with EN 1090-2
• DIN EN ISO 50001:2018
• DIN EN ISO 14001:2015

All corporate processes at Liebherr are focused on quality, from the selection of raw materials and suppliers to the after-sales service. Each individual component of the slewing bearing is subject to strict quality requirements. This is why we only work with select suppliers, who are audited on a regular basis. Internal company standards apply to certain raw materials like rolled steel rings. These standards contain requirements, which go beyond the common industry standards.

Liebherr bearings are characterised by their high quality and reliability. To guarantee and further improve our quality standard over the long term, we document all manufacturing and assembly processes in a production data acquisition system. This also serves as a central quality management system for production and assembly measurements, thus allowing comprehensive control, monitoring and tracking; deviations are quickly eliminated, and processes are constantly optimised.

Liebherr not only makes regular use of traditional computer-aided measurement methods. The Liebherr Group also possesses numerous highly specialised measuring devices. In recent years, for example, the company has invested in a state-of-the-art crack detection system using high frequency magnetisation and a fully climate-controlled slewing bearing measuring chamber. 3D measurements of slewing rings with a diameter up to 6,000 mm can be effected. This type of measurement is unique worldwide.