October 13,2026
High speed required scenario of bearing pose severe challenges to the centrifugal force, heat generation, lubrication, and service life of bearings. The main bearing high speed requred scenarios include:
1. Aerospace
Aero-engine main shafts: rotational speeds can reach tens of thousands of rpm, and they must withstand high temperatures and high centrifugal forces.
Aircraft accessories (APU), gyroscopes, rocket turbopumps: require extremely high rotational speeds and extremely low friction.
2. Machine Tools and Precision Machining
Motor spindles: commonly used in CNC machine tools, with rotational speeds reaching tens of thousands to over one hundred thousand rpm.
High-speed grinding heads, engraving machine spindles: require high rigidity and low vibration.
3. Energy and Power
Gas turbines, steam turbines: large high-speed rotating machinery.
Turbochargers: rotational speeds can reach over one hundred thousand rpm, with high temperatures.
Wind turbine main shafts (some high-speed ends), flywheel energy storage: operate at high linear speeds.
4. Automotive and Transportation
New energy vehicle drive motors: the trend toward higher rotational speeds is obvious, often exceeding 15,000 rpm.
Racing car engines, gearboxes: high rotational speed and high load.
High-speed rail traction motors, axlebox bearings: operate at high linear speeds.
5. Home Appliances and Consumer Electronics
Vacuum cleaner motors: tens of thousands of rpm.
Drone motors, dental drill bits: tens of thousands to hundreds of thousands of rpm.
Hard disk drive spindles, cooling fans: precision high-speed small bearings.
6. Industrial and Medical
Centrifuges, separators: high-speed rotation to achieve separation.
Medical turbine handpieces, dental drills: can reach over 300,000 rpm.
High-speed spinning spindles, printing machinery: continuously operate at high speed.
Core Challenges in High-Speed Environments:
Centrifugal force causes a sharp increase in rolling element loads
Heat generation and temperature rise control
Lubrication methods (oil mist, oil-air, jet lubrication, etc.)
Cage strength and stability
Vibration and noise control
When selecting bearings, the dN value (bearing bore diameter mm × rotational speed rpm) or dmN value (pitch diameter mm × rotational speed rpm) is usually used as a reference. The higher the value, the stronger the high-speed performance.
Lubrication and material determine the upper limit: The dN value of grease-lubricated angular contact ball bearings is about 1 million or less; with oil-air lubrication, it can be increased to more than 1 million; with ceramic balls, the dmN value can reach 2 million; under jet lubrication, it can even reach 3 million.
Differences among different bearings: For deep groove ball bearings with ordinary metal cages, the dN value limit is usually around 250,000. In contrast, specially designed high-speed angular contact ball bearings or air bearings can reach dN values in the millions.
We provide specialized custom development for high-speed bearing application environments that current standard bearings cannot meet. If you have such needs, welcome to contact us at any time.
