In the field of precision transmission that pursues high speed, long life, and stability, hybrid ceramic bearings have achieved complementary advantag...
In the field of precision transmission that pursues high speed, long life, and stability, hybrid ceramic bearings have achieved complementary advantages between ceramic materials and metal materials through the innovative structure of "ceramic rolling elements+metal inner and outer rings", becoming an ideal choice for balancing performance and cost. Widely used in high-end scenarios such as high-speed motors, machine tool spindles, aerospace equipment, etc., it retains the wear-resistant and high-temperature characteristics of ceramic materials, as well as the high rigidity and easy installation advantages of metal bearings, providing efficient and reliable transmission support for equipment.
1、 Core Structure and Material Characteristics
The hybrid ceramic bearing adopts a composite structure of * * "ceramic rolling elements+high carbon steel/bearing steel inner and outer rings" * *, and the core component characteristics are as follows:
Rolling element: Silicon nitride (Si ∝ N ₄) or silicon oxide (SiO ₂) ceramics are selected, which have the characteristics of low density (silicon nitride density of 3.2g/cm ³, only 60% of bearing steel), high hardness (HV1500-1800), low friction coefficient, etc. The surface is processed with ultra precision grinding, and the roundness error is ≤ 0.001mm
Inner and outer rings: Made of high-strength bearing steel (such as GCr15, SUJ2) or stainless steel (304/316), with a hardness of HRC58-62 after quenching treatment, ensuring radial bearing capacity and structural rigidity, and a surface roughness Ra of the raceway ≤ 0.02 μ m;
Retainer: Paired with copper alloy, phenolic resin, or polytetrafluoroethylene (PTFE) material to reduce rolling element friction and collision, suitable for different speed and temperature requirements.
This structure not only avoids the problems of high cost and brittleness of all ceramic bearings, but also compensates for the shortcomings of traditional metal bearings that are prone to wear at high temperatures and speeds.
