sales3@eejaxt.com +86-757-81263106
Summary of common faults of spindle motor

Summary of common faults of spindle motor

Dec 17, 2020

Summary of common faults of spindle motor

1. Fault phenomenon: serious abnormal noise of main shaft; noise at high speed; high temperature rise.

Cause analysis:

① The spindle bearing may be damaged or damaged;

② It may be that the lubrication of the spindle is not good, resulting in lack of oil; or the lubricating oil is dirty or there are impurities;

③ There may be dirt on the end face of the spacer ring;

④ It is possible that the preload of the spindle bearing is too large.

⑤ The belt position and tension may not be appropriate;

⑥ The dynamic balance of spindle parts is not good;

terms of settlement:

① Replace the spindle bearing;

② Properly add the main shaft oil, replace the new oil to ensure the cleanness of the main shaft

③ After the spindle is removed, clean the spacer ring;

④ Readjust the preload;

⑤ Readjust the belt position and tension;

⑥ Readjust the dynamic balance;

2. Fault phenomenon: the spindle has abnormal noise, it is hard to rotate by hand, and there is obvious jam feeling.

Cause analysis: it is possible that the screw locking the striking block of the cylinder is loose, resulting in the looseness of the collision block, so that there is no gap between the locking butterfly spring nut and the impact block, resulting in friction. ,

Solution: tighten the loose nut to make the gap between them suitable.

3. Fault phenomenon: in the cutting process, the vibration is large.

Cause analysis:

① The spindle bearing may be scratched or damaged;

② The looseness of bearing pre tightening nut causes the main shaft to move;

③ The bearing preload is not enough and the clearance is too large;

④ Other factors;

terms of settlement:

① Replace the bearing;

② Tighten the nut to ensure the spindle accuracy is qualified;

③ Adjust the bearing clearance again, but the preload should not be too large;

④ Check the tool or change the cutting parameters.