Precision angular contact ball bearings are equipped with various series of products that can choose the best specifications according to different us...
Precision angular contact ball bearings are equipped with various series of products that can choose the best specifications according to different uses, suitable for applications such as machine tool spindles that require high vibration accuracy and fast speed for rotating bodies.
In precision mechanical transmission and rotation systems, precision angular contact ball bearings are key components for achieving high-precision positioning and high-speed operation, widely used in high-end fields such as machine tool spindles, precision instruments, aerospace equipment, etc. Its unique structural design and excellent performance provide stable radial and axial joint bearing capacity for equipment, making it the "core hub" to ensure efficient operation of precision machinery.
1、 Core structure and working principle
A precision angular contact ball bearing consists of an inner ring, an outer ring, high-precision steel balls, a cage, and a sealing structure. The most significant feature is that there is a certain contact angle between the inner and outer raceway (usually 15 °, 25 °, 40 °, etc.). This design enables it to withstand both radial and unidirectional axial loads simultaneously, with a larger contact angle resulting in stronger axial load-bearing capacity. When the bearing is running, the steel balls transmit force through point contact in the raceway, and the cage evenly separates the steel balls to reduce friction and collision. With the help of special lubricating grease, low resistance rotation is achieved, ensuring that the rotation accuracy reaches the micrometer level (P4 level accuracy axial runout ≤ 0.005mm).
2、 Core performance advantages
1. Ultra high rotational accuracy to meet the requirements of precision machining
Adopting ultra precision grinding technology, the dimensional tolerances of the inner and outer rings and steel balls are controlled at P4 level (some high-end models reach P2 level), with roundness and cylindricity errors ≤ 0.001mm. Paired with high-precision retainers (made of copper alloy or phenolic resin material), the centrifugal force deviation during steel ball operation is reduced, ensuring that the radial runout of the main shaft or rotating shaft is ≤ 0.002mm and the axial displacement is ≤ 0.003mm, providing stable reference support for precision machining (such as mold milling and lens grinding).
2. High rigidity and low heat generation, suitable for high-speed working conditions
By optimizing the curvature radius of the raceway and the arrangement density of steel balls, the contact area is increased, and the bearing rigidity is improved (up to tens of thousands of N/μ m), effectively resisting deformation caused by cutting forces or loads. At the same time, low viscosity high-speed grease and lightweight retaining frame are used to reduce frictional power consumption during high-speed operation. When the speed reaches 10000r/min or above, the temperature rise can still be controlled within 20 ℃, avoiding accuracy degradation or lubrication failure caused by overheating.
3. Long term sealing and rust prevention, extending maintenance cycle
Provide contact sealing (rubber sealing ring) or non-contact sealing (dust cover) options according to the application scenario:
Contact sealing is suitable for dusty environments, with the sealing lip tightly attached to the inner ring and a protection level of up to IP65, effectively blocking the intrusion of coolant, chips, and other substances;
Non contact sealing is suitable for high-speed scenarios, reducing air resistance through labyrinth gap design, while balancing sealing performance and low friction. The surface of the inner and outer rings of the bearing is treated with phosphating or chrome plating to enhance its rust prevention ability, making it less prone to corrosion during storage or operation in humid environments.
3、 Adaptation scenarios and industry applications
With high precision and adaptability, this series of precision angular contact ball bearings are widely used in the following fields:
Machine tool equipment: The spindle system of CNC lathes and machining centers bears the radial and axial loads during cutting, ensuring machining accuracy;
Precision instruments: Coordinate measuring machines, rotating axes of laser processing equipment, providing micrometer level positioning accuracy;
Aerospace: components such as drone motors and gyroscopes, suitable for lightweight and high reliability requirements;
Medical equipment: The rotating structure of CT machines and precision surgical instruments ensures smooth and vibration free operation.
Whether it is a high-speed rotating spindle or a precision mechanism that requires precise positioning, optimal performance can be achieved through reasonable selection (such as adjusting contact angles and combination methods).
