High- and Low-Speed Bearings
Gearbox bearing design is typically driven by shaft speed. Low-speed shafts normally use fixed profile journal bearings, often with simple cylindrical bores. High-speed shafts have historically used multi-lobe fixed profile bearings, but are increasingly using tilting pad journal bearings.
High-speed applications can require special material combinations and may utilize ‘Directed Lubrication’ to reduce pad surface temperature and improve efficiency.