• Shandong JNLL Bearing Co., Ltd.
• 2023-10-23

Product Introduction

Harmonic reducer is a speed ratio conversion device composed of several pairs of gears, which has the advantages of small volume, large torque capacity, and long service life, and is widely used in industrial machinery. The selection of bearings for harmonic reducers is crucial as they directly affect their performance and service life.
The main characteristics of harmonic reducer bearings are:
1. High load-bearing capacity. Harmonic reducers have high axial and radial forces, so bearings must have sufficient static load capacity, usually using ball or roller bearings.
2. High precision. High requirements for bearing diameter accuracy and roundness may result in vibration, noise, and damage to the reducer.
3. Low noise. Low noise during operation is an important indicator of service life and performance, and it is necessary to choose the type and size of bearings with low noise.
4. High speed. Compared with other reducers, harmonic reducers have higher bearing speeds, so the bearings must have sufficient dynamic load capacity and a sufficiently high speed limit.
5. Good sealing performance. The bearings are sealed on both sides or used in conjunction with bearing sealing devices to prevent grease leakage and external particles from entering.
6. High temperature resistance. Under certain working conditions, bearings can withstand high temperatures. Therefore, it is necessary to choose high-temperature resistant bearing steel and lubricating grease to ensure normal operation.
The commonly used types of bearings for harmonic reducers are:
1. Ball bearings. It is a commonly used bearing type with high static load capacity, good accuracy, and high rotational speed.
2. Roller bearings. The static load capacity is higher, but the speed and accuracy are slightly inferior to ball bearings, used for high torque.
3. Angular contact bearings. The noise is lower and the vibration is smaller, but the accuracy and speed cannot match that of ball bearings, which is used in situations where low noise is required.
4. Deep groove ball bearings. Double row deep groove ball bearings have greater static load capacity and higher stiffness, making them suitable for situations with greater axial force.
In addition to bearing selection, lubrication and sealing of harmonic reducer bearings are equally important. High temperature resistant and leak proof lubricating grease should be selected for bearing lubrication; The bearing sealing device should be reliable to ensure that the lubricating grease does not leak out and prevent external impurities from entering.
In summary, the selection of bearings for harmonic reducers should be based on specific working conditions such as speed, load, temperature, etc. to determine the bearing model and other factors. Accurate bearing assembly and reliable sealing lubrication are crucial for ensuring the normal working life of bearings and reducers. This requires bearing and reducer production enterprises to have high technical strength and strict quality control awareness.