
3.MOTOR TYPES SPECIFICATIONS FOR THE αi SERIES B-65272EN/04
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3 MOTOR TYPES
Each model includes the types of motors listed below, and the user
can make an optimal choice according to the spindle driving structure.
See the ordering list (B-65271EN) for available motors.
Item Type Use Remarks
Flange mounting type
Connected to spindle via a gear
Directly connected to a spindle
Connected to spindle via a belt
The motor can be positioned
accurately.
Mounting types
Foot mounting type Connected to spindle via a belt
Mi sensor
When connected to the spindle via a
belt or gear at a deceleration ratio
other than 1:1
(When the spindle has a sensor)
Built-in sensor
MZi sensor
When connected to the spindle via a
belt, gear, or coupling on a 1:1 basis
(When the spindle has no sensor)
For a detailed explanation, refer to the
following descriptions:
Subsection, “Spindle Amplifier Module
(SPM)” in the SERVO AMPLIFIER αi
series DESCRIPTIONS (B-65282EN)
Shaft figure With no key Connected to a pulley
A shaft with no key is used as
standard to facilitate pulley and gear
balance correction and acceleration/
deceleration operation.
When a shaft with a key is needed,
contact your FANUC sales
representative.
Rearward exhaust
(Exhaust from side
opposite the output
shaft)
When the machine is positioned at
the output shaft side
Cooling air exhaust
direction
Forward exhaust
(Exhaust from the
output shaft side)
When the machine is positioned at
the side opposite the output shaft
Direct the exhaust out and away from
the machine.
Oil seal
Gear connection, direct connection,
and belt driving
Used in flange mounting type
standard-speed models.
Labyrinth
Belt driving and direct connection
(Only when no lubricant or coolant
splashes onto the flange surface of
the motor)
Used in flange mounting type high-
speed models. (Some high-speed
models have an oil seal.)
Output shaft seal
No seal
Belt driving
(Only when no lubricant splashes
onto the flange surface of the motor)
Foot-mounting type models have no
output shaft seal, but can be changed
to a model with an oil seal or labyrinth.
For the models that can be changed,
refer to "Order List" (B-65271EN).
Standard-speed
model
-
Maximum speed
High-speed model -
Consider the maximum speed of each
model and select a model accordingly.