
1.GENERAL FANUC AC SPINDLE MOTOR αiT SERIES B-65272EN/04
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Important
(1) For attachment of this type of motor to a spindle, only coupling-
based direct connection with the spindle is allowed. When a
spindle of direct motor connection type is used, fretting can
occur with the motor shaft in a short-time operation, or the
bearing of the spindle or motor can be damaged if the spindle
and motor are not aligned precisely. As the method of
quantitatively determining whether a spindle and motor are
aligned precisely, FANUC recommends the user to measure the
vibration (acceleration G) of the motor after being connected
with the spindle. For details, see Section 9.3, "CHECKING
MOTOR VIBRATION" in this manual.
(2) Do not apply a thrust load onto the motor shaft. Select a coupling
that does not apply a thrust load onto the motor shaft for a cause
such as coolant pressure when the temperature rises or cutting is
performed.