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Crane and Lifting Technology
Plastics for crane and lifting systems

Heavy-duty plastic components for crane and hoisting technology

Heavy loads are the order of the day for developers in crane and hoisting equipment. Cranes and hoisting equipment have to be designed for ever increasing load capacities and combine high operational safety with a long service life. For several decades, we have been supporting manufacturers in this task based on our heavy-duty plastic components.

Components made from our materials contribute to the performance and reliability of many types of cranes and hoisting equipment all over the world. Owing to their excellent heavy-duty properties, abrasion resistance and zero maintenance, they often replace steel components. Our plastic components significantly extend the servicelife of the cables, prevent stick-slip effects and in that way increase the efficiency of cranes and hoists.

Application examples:

  • Mobile cranes
  • Railway cranes
  • Truck loading cranes
  • Tower cranes
  • Dockside cranes
  • Marine and offshore cranes
  • Gantry and bridge cranes

Typical components:

  • Sheaves
  • Pulleys
  • Support plates
  • Sliding elements

For efficient and powerful cranes

Cranes are constantly subjected to high loads and have to be absolutely reliable even in demanding areas of application. In cooperation with our customers, we aim to increase performance and reliability, reduce maintenance times and optimise safety.

Cable-friendly

Thanks to their cable-friendly surface, our materials offer a very good distribution of the surface load and thus reduce the pressure between the cable and pulley. This results in a significantly longer cable service life. As a consequence there are fewer cable replacements and lower maintenance costs.

Excellent sliding properties

Because of their excellent sliding properties, our plastic components support a uniform hoisting process, prevent stick-slip effects and contribute to the efficiency and process stability of your cranes.

Light weight

Our plastic components are significantly lighter than conventional steel components. Their light weight contributes to the reduction of the overall weight of your design, increases the hoisting capacity of your cranes, depending on the design, and facilitate installation.

High wear resistance and toughness

Owing to their high wear resistance and toughness, our materials are suitable for high mechanical loads and contribute to a long service life of your cranes even in demanding applications.

High resistance to corrosion and weathering

Because of their high resistance to corrosion and weathering, our materials are suitable for permanent outdoor use and can withstand UV radiation, rain and snow.

Product examples:

Sheaves

Sheaves made of Lamigamid® (PA 6G), manufactured in the moulding process, are used by developers and manufacturers in crane and hoisting technology worldwide. Because of their high mechanical load capacity, dimensional stability and abrasion resistance, our sheaves are suitable for very high cable pull forces and support the performance and operational safety of cranes and hoists.

Different materials are available for different requirements depending on the application, for example for use at temperatures from -40°C to +60°C and in explosion-proof areas (ATEX). Ourmanufacturing processes and mechanical post-processing also enable us to manufacture special format castings. Our sheaves have an outer diameter of up to 3,090mm - world record!

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Sheave made of Lamigamid® 310 having an outer diameter of 3,090mm, fully assembled
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Lamigamid® sheaves available in different diameters and with pre-assembled bearings on request
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Support the performance and operational safety of cranes: Sheaves made of Lamigamid® combine very high cable pull forces with good vibration damping – here used in a Liebherr RL-K offshore crane - © Liebherr

Properties:

  • Lightweight
  • Extended service life of the cables
  • Good vibration damping of the materials
  • High resistance to corrosive effects

Materials:

Pulleys

Where cranes are used, cables have an important function. Pulleys made of Lamigamid® 310 (PA 6G) are safe, light and cable-friendly. In this way, they contribute to a high operational safety and reliability and extended maintenance intervals. The material combines high stability and wear resistance with weather resistance and impact strength. On request, we can supply Lamigamid ® 310 pulleys with pre-assembled, specially selected bearings.

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Pulley made of Lamigamid® 310
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Pulleys made of Lamigamid® available in various diameters
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Pulleys made of Lamigamid® 310 support operational safety and reliability of cranes

Properties:

  • Very low weight
  • High mechanical stability
  • High resistance to wear
  • High weathering resistance

Support plates

Telescopic cranes and truck-mounted cranes have to be secure and stable. Plastic support plates are used for this purpose. Support plates made of Lamigamid® are light and stable and have a low impact on the ground surface. Even at high impact loads, the plastic plates remain dimensionally stable. Support plates made of Lamigamid® are used at support pressures of 250kn – 1500kn. Heavy-duty support plates are made of Lamigamid® 300 (PA 6G), Lamigamid® 310 (PA 6G) or Lamigamid® 400 (PA 6G).

We supply support plates complete with assembly material according to your requirements – both for permanently installed and removable versions.

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Removable support plate made of Lamigamid® 300
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Support plate made of Lamigamid® 300 with variable positioning
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A Liebherr LRS 545 Reachstacker with a support plate made of Lamigamid® 300, © Liebherr

Special features:

  • Heavy duty
  • Lighter than steel structures
  • Shatter-proof, shock-resistant and impact-resistant

Sliding elements for telescopic booms

Sliding and pushing movements occur in various places in cranes and hoisting equipment. The self-lubricating properties and high wear resistance of the sliding elements such as glide strips, glide sheets and sliding guides made of Lamigamid® support this process and prevent stick-slip effects.

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Slider for curved telescopic segments
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Guide of the hydraulic cylinder in the telescopic boom
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Slider in the construction machine
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Slider with grease grooves

Properties

  • Heavy duty
  • Low moisture absorption
  • Good emergency operating properties

Arrange for technical consultation

The performance and service life of materials and components for cranes and hoisting equipment is determined by various influencing factors. These factors have to be taken into account for the proper selection and design. For instance:

  • Mechanical stress
  • Tribological requirements (friction and wear)
  • Weight
  • Contact with corrosive seawater
  • Contact with equipment
  • Extreme weather (UV) and abrasion (sand/waves)

We would be happy to assist you in selecting the proper material for your application. Just use our contact form at the bottom of the page and drop us a note.

 

 
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