The Importance of Bearings in Aerospace Sector
In accordance with all the other manufacturing industries, bearing applications play a crucial role in Aerospace sector, too. Aerospace bearings are divided into two major categories which are JOURNALS and ROLLINGS. Journals can be made of pig iron, plastic, brass, aluminum composites and white metals. The Rollings’ inner and outer rings are made of water hardened and stoned chrome steel, chromium nickel whereas the roller element is produced with high quality steel, chrome and chromium nickel to withstand heavy rolling loads.
The combustion turbines that are used in airplanes and helicopters perform in heavy working conditions with very high speed and temperature. Therefore, the quality and qualifications of the bearings such as minimum friction and energy loss have vital importance.
Various types of bearings with different components are produced to satisfy specific application demands of the aerospace industry. To explain briefly:
- Pig Iron: Preferred usage area is lifting machinery with slow moving and random rolling journals that are exposed to a pressure of less than 25 to 30 kg/cm2. High erosion resistance, sensitive to strokes.
- Bronze: It is a very slippery component with resistance to a pressure of 40 to 60 kg/cm2.
- Plastic: Preferred in slow moving applications. Decreases the stroke amount of the machinery however thermal conductivity is not performed efficiently.
- White Metals (Tin, Lead, Antimony and Copper): These are the most appropriate components.