OEM Industrial Servo Motor Fanuc AC Spindle Motor A06B-0750-B190

Part Number: A06B-0750-B190

Series: S Series AC Spindle Motor

Model: 1S (Model 1)

Condition: New / Refurbished / Exchange Available

The Fanuc A06B-0750-B190 is a compact, flange-mounted AC spindle motor from Fanuc's S Series 1S range, engineered for high-speed spindle duty on small CNC lathes, machining centers, and multi-axis turning platforms.

Despite its modest footprint, it delivers a solid continuous output of 1.5 kW with a short-term 2.2 kW rating, making it well-suited for light-to-medium cutting operations where spindle speed and responsiveness are prioritized over raw torque.

This motor operates up to 8,000 RPM, placing it in an ideal range for turning aluminum, plastics, non-ferrous materials, and smaller-diameter steel work where high RPM provides significant advantages.

The integrated rear-mounted exhaust fan ensures thermal stability during sustained spindle operation without requiring external forced-air cooling, simplifying installation in confined machine enclosures.

Fanuc engineered the 1S series with reliability and serviceability as primary considerations. The flange mount design enables clean, rigid attachment directly to machine spindle housings or gearbox plates, reducing mechanical complexity in the drive train and simplifying alignment during installation or motor replacement.

The keyed shaft provides positive torque transmission to pulleys, couplings, or belt drives without relying solely on interference fit or clamping force. This design is particularly beneficial for applications involving regular direction reversals or intermittent high-torque demands.

Cooling is managed by the integrated rear exhaust fan, which draws air through the motor housing and exhausts it from the rear. This self-contained system maintains operating temperature within specified limits during continuous and short-term duty cycles without requiring additional ducting or separate blower units.

The BZ feedback unit installed on the A06B-0750-B190 provides essential spindle position and speed data required for closed-loop spindle control, including:

• Spindle orientation (fixed angular position stop)
• Constant surface speed (CSS) control
• Threading synchronization on turning centers

BZ series feedback utilizes serial pulse encoder technology and integrates seamlessly with Fanuc's digital spindle drive architecture across multiple control generations.

This motor maintains compatibility with a broad range of Fanuc digital AC spindle amplifiers and serial spindle drive modules, spanning control systems from the older Fanuc Series 0-B through the Series 21 family.

The 1S Model 1 spindle motor is deployed across various small CNC machine applications, including:

• Compact turning centers
• Slant-bed lathes
• Small vertical machining centers
• Dedicated drilling/tapping machines

Its 8,000 RPM maximum speed suits direct-drive or single-stage belt configurations, while the 2.2 kW short-term rating provides sufficient headroom to handle tool engagement spikes without triggering overcurrent faults.

Surplus and refurbished examples of the A06B-0750-B190 remain available through industrial MRO channels. When sourcing used units, consider these inspection points:

• Check shaft for wear at the keyway
• Verify rear fan operates freely without noise
• Confirm BZ encoder connector and cable exit are undamaged
• Measure winding resistance across all three phases

Units with histories of overcurrent events or known overheating should undergo bench testing or professional rewinding before returning to service.