FULL CERAMIC BEARINGS

Bearings are fundamental to ensuring the effective operation of machines and systems.
Almost all existing bearings comprise rings and rolling elements in 100Cr6 (categorised as “bearing steel”). These are described as standard bearings.
Bearing types and geometries have long been coded and standardised, but in recent years the materials used to make bearings have undergone a technological leap. The ultimate goal of this development process is to increase bearing performance so that the machines and systems in which bearings are used perform better too.
Ceramic bearings were created with exactly this purpose in mind.

Ceramic bearings are bearings in which the rolling elements are made of ceramic.
They are divided into two families according to the materials used to make the rings:

Full ceramic bearings
with rings and rolling elements in ceramic.

Hybrid bearings
with rings made of 100Cr6 bearing steel or AISI420 or AISI440C stainless steel and rolling elements made of ceramic.

cuscinetti-ceramici-precisi

THE ADVANTAGES OF FULL CERAMIC BEARINGS:

  • Bearings made of ceramic can work in extreme conditions, where steel bearings cannot meet the required conditions.
  • Ceramic bearings can reach higher speeds than steel bearings.
  • Full ceramic bearings are lighter than their steel counterparts, making them ideal for reducing overall weight and stress on the structure at high rotating speeds.
  • Full ceramic bearings can operate in environments with much higher temperatures than steel bearings.
  • Full ceramic bearings can also work in hostile environments, in the presence of corrosive substances or simply in contact with water.
  • Full ceramic bearings can work even without lubrication.

materialS

The ceramics commonly used for full ceramic bearings are:

  • silicon nitride (Si3N4)
  • zirconium oxide (ZrO2)
  • aluminium oxide (Al2O3)
  • silicon carbide (SiC)

Bearings can be made up of a combination of rings and balls in different ceramic materials; the choice is dictated by the working conditions and performance to be achieved.

cages

Depending on the application, ceramic bearings may contain cages and guides for rolling elements in different shapes and materials.
For some specific applications, it is advisable to use full-complement bearings, i.e. cageless.

Cages can be made of the following materials:

  • PEEK (polyether ether ketone)
  • PTFE (polytetrafluoroethylene, also commonly known by its trade name of Teflon)
  • Phenolic resins (bakelite belongs to this group of resins)
  • PET (polyethylene terephthalate)
  • PA66 (polyimide, commonly known as nylon)
  • AISI304/AISI316 (stainless steel)

 

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OUR BEARING EXPERTS ARE AT YOUR DISPOSAL TO HELP YOU CHOOSING THE BEST BEARING
raw-537-TEAM CERAMICI Paone Berizzi NEW
Franco, has been following the most extreme applications in the aerospace field for over thirty years; Andrea, a designer engineer specializing in bearing design.
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SPECIFIC APPLICATIONS

Wind turbines
Water treatment
Oil / Gas
Drilling
Earth-moving machinery
Crane trucks
Lifting systems
Marble working
Filling
Packaging
Labelling
Robotics
Industrial automation

and many other applications, to be engineered and developed in partnership with you