Big metal noise

Reason 1: abnormal load, countermeasures: correction fit, research on bearing clearance, adjustment and load, correction of housing shoulder position.

Reason 2: poor installation, countermeasures: shaft, shell processing precision, improve the installation precision, installation method.

Reason 3: insufficient or inappropriate lubricants, countermeasures: supplement lubricants, choose the appropriate lubricants.

Reason 4: rotating parts have contact, countermeasure: modify the contact part of the curved road seal. 

Rules of the noise

Reason 1: the rolling surface produces indentation, rust or scar due to foreign body. Countermeasures: replace the bearing, clean the relevant parts, improve the sealing device, and use clean lubricant. 

Reason 2: (after steel carburizing) surface deformation, countermeasures: replace the bearing, pay attention to its use.

Reason 3: raceway surface stripping, countermeasure: replacement of bearings.

Irregular noise

Reason 1: the clearance is too large. Countermeasures: study the fit and bearing clearance and modify the preload.

Reason 2: foreign body invasion, countermeasures: research to replace the bearing, cleaning the relevant parts, improve the sealing device, use clean lubricant.

Reason 3: spherical damage, stripping, countermeasures: replacement of bearings.

Abnormal temperature rise

Reason 1: too much lubricant, countermeasures: reduce the lubricant, appropriate use, choose a harder grease.

Reason 2: insufficient or inappropriate lubricants, countermeasures: supplement lubricants, choose the appropriate lubricants.

Reason 3: abnormal load. Countermeasures: modify the fit, study the clearance of the bearing, adjust the preload, and modify the position of the housing shoulder. 

Reason 4: poor installation, countermeasures: improve the shaft and shell machining accuracy, installation accuracy, installation method.

Reason 5: the creep of the mating surface and excessive friction of the sealing device. Countermeasures: replace the bearing, study the mating, modify the shaft and shell, and change the sealing form.

Large vibration (shaft pulsation)

Reason 1: (after steel carburizing) surface deformation, countermeasures: pay attention to the bearing replacement operation.

Reason 2: stripping, countermeasure: bearing replacement.

Reason 3: poor installation, countermeasures: modify the shaft, housing block shoulder right Angle, pad side straight Angle. 

Reason 4: foreign body invasion, countermeasures: replace the bearing, cleaning each part, improve the sealing device, etc.

Excessive lubricant leakage and discoloration

Reason: excessive lubricant, foreign body invasion, foreign body generated by wear powder, etc. Countermeasures: appropriate use of lubricant, research on the choice of lubricant, research on the replacement of bearings, cleaning the shell.