Precautions for wear of IKO linear bearing during operation
Precautions for wear of IKO linear bearing during operation
2022年4月3日
Basic requirements of IKO plastic bearing for machine tool spindle
Basic requirements of IKO plastic bearing for machine tool spindle
2022年4月3日

Common maintenance methods for abnormal operation of IKO combined bearing

  • Generally speaking, the temperature of the combined bearing will rise after it starts to operate. After a period of time, it will be normal at a lower temperature (usually 10 ~ 40 degrees higher than the room temperature).
  •  The time to normal varies according to the size, form, rotation speed and lubrication method of IKO bearing, and the heat release conditions around the imported bearing. At this time, it takes about 20 minutes to several hours.Common maintenance methods for abnormal operation of IKO combined bearing

Common maintenance methods for abnormal operation of IKO combined bearing

  • When the bearing temperature does not reach normal and abnormal temperature rise occurs, the following reasons can be considered. In addition, shut down as soon as possible and take necessary countermeasures. 
  • Temperature is very important to maintain the proper service life of imported bearings and prevent the deterioration of lubricating oil. It is recommended to control it under non high temperature (generally below 100 ℃) as much as possible. 
  • The main reason for the abnormal rise of lubricating oil temperature is too much or too little. The IKO bearing is poorly installed. The internal clearance of the combined bearing is too small or the load is too large. Excessive friction of sealing device. Lubricant does not match. Creep of mating surface.Common maintenance methods for abnormal operation of IKO combined bearing
  • Secondly, check the raceway surface of the bearing, the condition of the rolling surface and joint surface, as well as the wear condition of the confrontation frame for damage and abnormal conditions. In particular, check the running track of the raceway surface. 
  • To judge whether the bearing can be used again, we should think about the damage level of the combined bearing, mechanical function, priority, operation premise, search and inspection cycle, etc.Common maintenance methods for abnormal operation of IKO combined bearing
  • Strong metallic sound
  • 1. Abnormal load: select appropriate assembly clearance and preload
  • 2. Poor assembly: improve the machining accuracy of the shaft and improve the installation method
  • 3. Insufficient lubricant: supplement or use appropriate lubricant
  • Regular tone
  • 1. Corrosion, indentation and scar of channel caused by foreign matters: clean relevant parts and use clean grease
  • 2. Channel peeling: fatigue wear, replace IKO bearing
  • Irregular abnormal sound
  • 1. Foreign matter intrusion: clean relevant parts and use clean grease
  • 2. Excessive clearance: pay attention to fit and select appropriate clearance
  • 3. Steel ball scar: steel ball fatigue peeling or foreign matter jamming, replace the bearing
  • Abnormal temperature rise
  • 1. Excessive lubricant: reduce lubricant
  • 2. Insufficient or unsuitable lubricant: add lubricant or select appropriate lubricant
  • 3. Creep of mating surface or excessive sealing device: the mating surface of outer diameter or inner diameter of combined bearing is corrected, and the sealing form is changed
  • The rotation vibration of the shaft is large
  • 1. Spalling: fatigue spalling, replace IKO bearing
  • 2. Poor assembly: improve the machining accuracy of the shaft and improve the installation method
  • 3. Foreign matter intrusion: clean relevant parts and use clean grease
  • Large lubricant leakage and discoloration
  • 1. Excessive lubricant: reduce lubricant
  • 2. Foreign matter intrusion: clean relevant parts
  • If IKO bearing is well lubricated and properly blocked from sundries and moisture, it means that the oil seal should not be worn However, when opening the bearing housing, check the bearing and regularly check the oil seal Check the condition of oil seals near the universal joint bearing to ensure that they are sufficient to prevent hot liquid or corrosive liquid or gas from penetrating into the bearing along the axis. If the oil seal is worn, replace it as soon as possible
  • High temperature often indicates that the bearing is in abnormal condition High temperatures are also harmful to lubricants in bearings Sometimes bearing overheating can be attributed to the lubricant of the bearing If the bearing operates for a long time at a temperature of more than 125 ℃, the service life of the bearing will be reduced
  • The causes of universal joint bearing include insufficient or excessive lubrication, magazine contained in lubricant, excessive load, IKO bearing damage, insufficient clearance, high temperature friction caused by oil seal, etc
  • 1. Burn: serious temperature rise of the bearing, resulting in burn and failure to rotate.
  • Cause: the clearance is too small; Insufficient lubrication or improper lubricant; Roller inclination; Excessive load; In the case of temperature rise, the hardness is low.
Common maintenance methods for abnormal operation of IKO combined bearing
  • Measures: check the type of lubricant and ensure the filling amount; Set appropriate clearance; Check the service conditions; Prevent the center line of universal joint bearing from tilting; Check the design around the bearing;Common maintenance methods for abnormal operation of IKO combined bearing
  • 2. Stripping: the surface of the raceway movable rolling element is stripped, and the stripping is concave and convex.
  • Cause: excessive load and poor use; Poor installation; Poor accuracy of shaft or universal joint bearing housing; Not enough games; Dust entry; rust; Improper lubrication; When the temperature rises, the hardness decreases.Common maintenance methods for abnormal operation of IKO combined bearing
  • Measures: re select the bearing; Reconsider the clearance and check the machining accuracy of shaft and bearing housing; Re study the service conditions; Check the installation method; Check the lubricant and lubrication method.
  • 3. Abrasion: there are two types of abrasion: one is that red wear powder particles are generated on the mating surface, and the other is that Brinell indentation is generated on the rolling element
  • Cause: insufficient interference; The swing angle of IKO bearing is insufficient; Insufficient lubrication; Uncertain load, stability, vibration
  • Measures: check the interference and lubricant status; The inner and outer rings shall be packed separately during transportation; Reselect lubricant; IKO bearing re selection
  • 4. Cage damage: the rivet is loose or broken, and the cage is broken.
  • Cause: excessive torque load; High speed rotation or frequent speed change; Poor lubrication; Foreign matter stuck; Large vibration; Poor installation.Common maintenance methods for abnormal operation of IKO combined bearing
  • Measures: check the lubrication conditions; Re study the selection of cage; Check the service conditions; Improve installation methods.Common maintenance methods for abnormal operation of IKO combined bearing
Technical requirements for Timken non-standard bearing