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5. Precautions
1、 The ambient conditions have to keep dry. Surface of the spindle
should be clean.
2
、
The operator should obtain skillful and normative operating
abilities.
3、After the spindle is started, it must be pre-heated by low-speed
running for 10 or 15 minutes, which makes the grease fiber permuted in
the direction which bearings rotate. Thus it can reduce the bearing heat
and fully lubricate the bearings. Otherwise, without sufficient lubrication,
the bearing balls will slip in the raceway and can not be well lubricated,
which will easily damage the bearings and cause an increase in noise.
4、Sufficient cooling must be ensured when the spindle is working.
For the water cooling spindle, the water has to be 2°C more than the
ambient temperature. Maximum water temperature should be not above
60℃. If the high-speed spindle works at a high temperature for a long
time, it will accelerate the grease failure, and eventually the rotating noise
becomes louder, the vibration increases, the high-speed bearings are
damaged, the coil is burnt, and maybe some other faults.
5
、
Using an abraded tool for machining, or continuing using the
tool after it’s abraded, will generate a large axial & radial force to the
high speed bearing during cutting feeding, which will accelerate the
bearing damage and increase the rotation noise. After the spindle works
like it for a long time, an axial gap will be caused.
6、If the collet can not get off the nut or get stuck at the end of
spindle rotor, usually it’s due to damaged nut. Please replace the nut
timely.
7、Clean the wasted chips off the nut, collet and rotor end timely. .
These chips will not only scratch the rotor cone which affects the
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