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FANUC Spindle Motors


FANUC’s spindle motors have the same design and manufacturing priorities as our servo motors: provide the ultimate in performance, reliability and efficiency. Our exceptional motor control software and exacting manufacturing tolerances deliver motors that are whisper-quiet, practically vibration-free and have a track record of running for decades without failure.

Types of FANUC Spindle Motors

FANUC produces three series of spindle motors. Our BETA i-B Series spindle motors offer a significant performance-to-cost ratio, making them ideal for controlling costs. Our ALPHA i-B Series spindle motors offer enhanced torque and power to handle heavier cutting and provide shorter acceleration and deceleration times. Belts and gearboxes can induce vibration and wear, our BUILT-IN (frameless) Bi-B Series spindle motors eliminate the need for additional mechanical equipment through their direct drive design.



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FANUC AC Spindle Motors



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FANUC Built-in Spindle Motors


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Models of FANUC Spindle Motors

We provide a vast selection of spindle motors for both general and special purposes:

P Model Motors: Offer a wide constant POWER range, ideal for both lathes and machining centers. 

T Model Motors: Equipped with hollow motor shafts to support THROUGH-spindle coolant delivery, ideal for machines where the quickest drilling operations are desired. 

L Model Motors: LIQUID-cooled motors, providing substantially more output power than their air-cooled counterparts; also, incorporate hollow shafts for through-spindle coolant delivery.

We'll help you find the best FANUC Spindle Motors to fit your needs.
Contact a FANUC CNC Expert, today.


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Construction of FANUC Spindle Motors

The final distinction of our spindle motors relates to their construction. Spindle motors can be induction-type (AKA, asynchronous) or synchronous-type.

Induction: The most common construction for a spindle motor; applications involving heavy cutting for short periods of time or light-duty cutting at high-speed are ideal for induction spindle motors. FANUC induction spindle motors have a capital ‘I’ in the model name. Example: αiIP-B is an ALPHA i-B Induction spindle motor with a wide constant Power band.

Synchronous: These spindle motors excel at high-speed machining of large workpieces as well as applications needing frequent acceleration and deceleration of the spindle, such as tapping or small parts turning. FANUC synchronous spindle motors have a ‘S’ in the model name.

All FANUC BETA i-B Series spindle motors are induction-type. The available motor and amplifier combinations provide adequate power and low-cost for economical machines. The design of the motor winding and very effective cooling structure provide for large amounts of both power and torque in a compact size.

BETA i-B Series spindle motors feature:

  • Available models: standard, ‘P’ (power) and ‘T’ (through-coolant)
  • 200V or 400V input voltage
  • 200V or 400V input voltage
  • Torque output 14-323 Nm
  • Power output 2.2-22 kW
  • V5 vibration class for smooth rotation
  • Motor rear can be re-balanced after coupling to spindle for minimal vibration
  • Up to 12,000 RPM
  • Noise 75 dB or less
  • IP54 protection

FANUC ALPHA i-B Series spindle motors are available in induction- and synchronous-type. The available motor and amplifier combinations provide substantial power and torque for high-performance and large machines; multiple amplifiers can be combined for very large power applications. The design of the motor winding (multiple windings on some models) and very effective cooling structure provide for huge amounts of both power and torque in a compact size.

ALPHA i-B Series spindle motors feature:

  • Available models: standard, ‘P’ (power), ‘T’ (through-coolant), and ‘L’ (liquid-cooled)
  • 200V or 400V input voltage
  • Torque output 3.5-2,800 Nm
  • Power output 0.55-280 kW
  • V3 vibration class for ultra-smooth rotation on most models, V5 with V3 optional on remaining
  • Motor rear can be re-balanced after coupling to spindle for minimal vibration
  • Up to 24,000 RPM
  • Noise 75 dB or less
  • IP54 protection, IP65 optional on some models

FANUC B i-B Series frameless spindle motors are available in induction- and synchronous-type. The available motor and amplifier combinations provide unmatched power and torque, relative to size, for machines of every type; multiple amplifiers can be combined for very large power applications. Stators are available with or without integrated cooling jackets. Available water cooling provides 20% higher output and 25% less temperature rise over oil cooling.

Bi-B Series spindle motors feature:

  • Available models: BiI-B (induction) and BiS-B (synchronous)
  • 200V or 400V input voltage
  • Torque output 0.075-1,694 Nm
  • Power output 0.5-150 kW
  • Up to 80,000 RPM
  • Vibration-free design

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