Typical Application Scenarios of Servo Motor Bearings

Typical application scenarios of servo motor bearings: from CNC machine tools to industrial robots

Servo motor bearings in different industries face significant differences in load, speed, environment and other working conditions, and have different focuses on the performance requirements of the bearings. This article will focus on four core areas: CNC machine tools, industrial robots, new energy vehicles, and aerospace. It will disassemble targeted solutions and recommend compatible self-owned brand bearing models to help you quickly find products that match your needs through scenario benchmarking.

 Industry-specific solutions: Tailored to address the pain points of specific scenarios

1. CNC machine tools: Angular contact ball bearings, laying the "precision foundation" for precision machining

CNC machine tools are one of the core application scenarios for servo motor bearings, where the rotational accuracy of the spindle motor and feed motor directly determines the machining quality of the parts, especially in precision cutting, high-speed milling and other processes, where the accuracy, speed and stability of the bearings are all indispensable.

Core pain points: Vibration and radial runout at high speeds lead to deviations in machining accuracy; Excessive temperature rise caused by prolonged continuous operation affects bearing life.

Recommended bearing type: P4/P2 grade angular contact ball bearings (contact Angle 25°/40°)

Solution advantages: With ultra-precision processing technology, radial runout ≤0.003mm, paired with lightweight PEEK cage and high-temperature grease, critical speed up to over 20,000 RPM; Compared with ordinary bearings, the machining accuracy is increased by 20% and the continuous operation life is extended by 30%, which can meet the precision machining requirements of CNC lathes, machining centers and high-speed electric spindles.

2. Industrial robots: Thin-walled bearings, suitable for compact joint design

The joint motor space of industrial robots (especially collaborative robots and humanoid robots) is extremely compact, and they have to withstand frequent start-stop, compound loads and high-precision positioning requirements, which poses a double challenge to the volume, flexibility and load-carrying capacity of the bearings.

Core pain point: Limited installation space, ordinary bearings cannot fit; Wear and vibration caused by frequent joint movement affect repeat positioning accuracy.

Recommended bearing types: Thin-walled angular contact ball bearings, crossed roller bearings (thin-walled series)

Solution Advantage: With a thin-walled structure design, the difference between outer and inner diameters can be as small as 5mm, achieving high rigidity in a limited space; The rolling elements are evenly distributed, the load-bearing capacity is 15% higher than that of ordinary bearings of the same size, and the repeat positioning accuracy can reach ±0.002mm, perfectly fitting the compact layout and high-frequency motion requirements of robot joints.

3. New energy vehicles: Electrically resistant bearings, suitable for 800V high-voltage platforms

New energy vehicle drive motors mostly use 800V high-voltage platforms, which are prone to generating erosion-induced currents during operation. At the same time, the motor compartment temperature is high and the vibration is intense. Ordinary bearings are prone to problems such as raceway pitting and spalling, seriously affecting the stability of the drive system.

Core pain point: High-voltage electrical erosion leads to shortened bearing life; Sealing and lubrication failure in high-temperature, vibrating environments.

Recommended bearing type: Electrically resistant insulating bearing (ceramic rolling elements/insulating coating)

Solution Advantage: Use Al2O3  ceramic rolling elements or insulating coating on the outer ring of the bearing to block the conduction of erosion current; Combined with a high-temperature (-40℃ to 150℃) sealing structure and special grease, the electrical corrosion resistance is enhanced by three times, and the service life under an 800V high voltage platform can reach more than 5000 hours, compatible with the drive motors and reducers of pure electric and hybrid vehicles.

4. Aerospace: Self-lubricating bearings, suitable for extreme environments

Servo motor bearings in the aerospace field operate in extreme environments such as vacuum, high and low temperatures (-60 。 C to 120 。 C), and strong radiation, and are extremely difficult to maintain, demanding reliability and self-lubrication capabilities of the bearings.

Core pain point: Grease failure at extreme temperatures; Seal leakage and wear increase in a vacuum environment; Life anxiety due to the inability to maintain frequently.

Recommended bearing types: Self-lubricating ceramic bearings, solid-lubricated coated bearings

Solution Advantage: With Si3N4   ceramic material and MoS2   solid lubrication coating, it can run stably without additional lubrication; High and low temperature resistance, radiation resistance, vacuum adaptability, L10 life of over 10,000 hours, meets the core requirements of aerospace equipment for high reliability, long life, and maintenance-free.

Self-owned brand compatible product recommendations: Precisely match the scene requirements

Based on the above industry scenarios, the following are recommendations for private label servo motor bearings for different fields. The core parameters have been verified in practice and can be directly matched with procurement requirements:

Conclusion: Scene alignment makes selection more efficient

The core of selecting servo motor bearings is that the scenario determines the demand and the demand matches the performance. Whether it's the high precision of CNC machines, the compactness of industrial robots, the resistance to electrical corrosion of new energy vehicles, or the adaptability to extreme environments in aerospace, only targeted solutions can maximize the value of bearings.