We supply our bearings and share our technical knowledge with the world’s top listed wind turbine manufacturers.

We supply our bearings and share our technical knowledge with the world’s top listed wind turbine manufacturers.

Even before the ratification of the Kyoto protocol in 1997, JTEKT already made its important contribution to the wind turbine industry by using advanced technology and knowledge to develop and manufacture reliable, state of the art bearings. We supply our bearings and share our technical knowledge with the world’s top listed wind turbine manufacturers.

A wind turbine should run for 20 years with an availability of 95-98%. During this period maintenance is needed with an approximate frequency of every 6 months. Therefore reliability is the primary driver for its design. Taken this into account we have developed bearings for several applications in a wind turbine:

  • Generators
  • Main shaft
  • Gearbox

Experience and capabilities

Products for Generators:

Our Koyo brand hybrid ceramic bearings for generators feature ceramic balls with excellent insulation performance which additionally prevents high temperatures while rotating. Compared to regular types, our hybrid ceramic bearings improve the efficiency of use; reduce the frequency of re-lubrication and of preventive maintenance.

Products for the Main shaft:

Spherical roller bearings are used primarily for the main shaft of a wind turbine because of their superior aligning characteristics and load durability. Complex analysis of rotor rotational speeds, appropriate loads, shaft, housing, rigidity and lubrication are done on a regular basis to ensure the quality of our bearings.

Products for the Gearbox

The planetary gearbox and the generator of a wind turbine transform mechanical power into electricity. The gearbox needs to increase efficiency, provide low speeds, deliver high reduction ratios, transmit a higher torque and distribute proper stress among different load-bearing components.

Bearing 3D

What is a bearing?

A bearing is a moving device that supports rotational movement between a stationary part and a rotating part. There are several types of bearings like slide, magnetic and rolling bearings. Koyo bearings are “Rolling Bearings” Rolling bearings have a long service life, high interchangeability and is power saving. The rolling elements of the bearings are assembled between inner and outer rings with or without cage. With this structure, a smooth rolling motion can be realized during operation. The great advantages of rolling bearings are:

  • Low starting friction
  • Ability to support both radial and thrust load and high speed rotation
  • Easy to handle and maintained
  • Interchangeable and easy acquirement (global normalization & standardization)
  • Can operate in extreme environments (high and low temperatures)
  • Simple methods of grease lubrication

Bearings are critical elements in all types of machinery and products. You can find them for example in automobiles, airplanes, home appliances but also in equipment for malting steel and semiconductors.

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