Type | Hybrid ceramic ball bearings |
Standard type | B40-180 |
Size（mm） | Inner diameter | 40 |
| Outer diameter | 90 |
| high | 23 |
Rolling body | Ceramic balls/steel balls |
Rotational speed (revolutions per minute) | 18000 |
The precision of the servo motor bearings complies with the latest standards of ISO 492:2023 and GB/T 307.1-2024, and is divided into five levels: P0, P6, P5, P4 and P2. The precision index gradually tightens as the level increases.P0 and P6 are general industrial-grade precision, mostly used in ordinary transmission equipment, and cannot meet the operating requirements of servo systems. Servo motors generally use P5 precision grade and P4 ultra-precision grade bearings, which can achieve ±0.01° angular deviation, ±0.005mm repeatability, millisecond-level dynamic response, and no crawling phenomenon at low speed. Compared to P6 grade bearings, its friction loss can be reduced by 20% to 30%. It is a core component for precision control in high-end equipment and directly affects the overall performance of the servo system.
Conventional bearings are mostly used in transmission equipment with simple operating conditions and low positioning requirements, and can only meet basic operating needs. This product meets the precision standards for servo motors and can be used for the smooth and efficient operation of servo motors. Servo motor bearings, with their high precision, low friction, and stable operation, can adapt to complex working conditions such as high-frequency start-stop, rapid reversal, and precise positioning. They are currently widely used in CNC machine tools, automated production lines, industrial robots, 3D printing, semiconductor equipment, and other fields, and are an indispensable core component of high-end precision equipment.
The advantages of hybrid ceramic bearings
1、High temperature resistance
The thermal expansion coefficient of ceramic balls is small, and the bearing balls will not expand due to temperature in high temperature environments, which greatly increases the operating temperature of the entire bearing. The temperature of ordinary bearings is about 160 degrees, and the temperature of ceramic balls can reach more than 220 degrees.
2、High speed
Ceramic balls have oil-free and self-lubricating properties, and the friction coefficient of ceramic balls is small, so ceramic ball bearings have a very high speed. According to statistics, bearings using ceramic balls are more than 1.5 times the speed of ordinary bearings.
3、Long lifespan
Ordinary bearings are used in water and high temperature environments, the grease is easy to wash off or dry out. so the bearing will soon be damaged. Using ceramic balls as rolling elements ，this avoids the occurrence of premature bearing damage caused by the drying of grease in ordinary bearings according to our test and some customer feedback, the service life of the bearing after using ceramic balls is 2- 3 times。
4、Insulation
The rolling elements are made of ceramic balls, which can achieve insulation between the inner ring and the outer ring of the bearing. Because ceramic balls are insulators, using ceramic balls between the inner and outer rings of the bearing can achieve the effect of insulation. In this way, the bearing can be used in a conductive environment. This is also the biggest advantage of hybrid ceramic bearings.
5、Oil-free and self-lubricating
Ceramic balls have oil-free and self-lubricating properties, that is to say. even if the grease dries out ,the bearing can still operate, so ceramic ball bearings can be grease-free.
