Fanuc A06B-0153-B088 AC Servo Motor
Flange Mount, Keyed Straight Shaft, IP65 Protection
Part Number: A06B-0153-B088
Series: Fanuc A06B AC Servo Motor
Condition: New / Refurbished / Exchange Available
Overview
The Fanuc A06B-0153-B088 is a compact, flange-mounted AC servo motor from Fanuc's A06B product line, featuring a long and well-documented service history across CNC machine tools, robotic work cells, and automated production equipment.
With a 0.5 kW continuous output rating and 30 Nm stall torque, this motor delivers exceptional performance for its output class. The high stall torque makes it ideal for demanding low-speed load conditions where holding force and break-away torque are critical.
Rated to 3,000 RPM with a keyed straight shaft, IP65 housing protection, and incremental encoder for closed-loop feedback, the A06B-0153-B088 excels in compact axis drives, indexing tables, clamping mechanisms, and applications requiring small-footprint servos that handle substantial mechanical loads.
Compatible with standard servo amplifier supply voltages (191-230 VAC) found in Fanuc drive cabinets across global machine tool installations.
Key Specifications
| Parameter |
Value |
| Output Power |
0.5 kW (0.67 HP) |
| Stall Torque |
30 Nm |
| Continuous Output Current |
Approx. 11 A |
| Input Voltage |
191 - 230 VAC |
| Maximum Speed |
3,000 RPM |
| Shaft Type |
Straight Keyed Shaft |
| Mounting |
Flange |
| Encoder Type |
Incremental |
| Ingress Protection |
IP65 |
| Approx. Weight |
0.45 kg |
Built for Load, Not Just Speed
While rated at 0.5 kW might suggest light-duty applications, the 30 Nm stall torque indicates a motor designed for substantial holding and low-speed force output. This makes it particularly suited for positioning and indexing tasks rather than high-speed continuous axis drives.
Applications requiring position locking against external load, resistance to back-driving, or acceleration of moderately heavy mechanisms from rest benefit directly from this torque characteristic.
The combination of high stall torque, moderate speed ceiling, and compact flange mount makes this motor ideal for auxiliary and sub-axis servo drives including fourth-axis rotary tables, tool changer mechanisms, clamping cylinders with servo feedback, and positioning functions alongside main machine axes.
Shaft, Mounting & Integration
The keyed straight shaft provides positive mechanical drive that prevents slipping under shock loads or repeated direction reversals - essential for indexing and positioning applications. This design simplifies pulley and coupling installation, particularly for field assembly and disassembly without specialist tooling.
Flange mounting offers a rigid, face-mount interface that bolts directly to machine structures or gearbox plates. This standard approach ensures precise alignment with driven components, reducing installation time and maintaining consistent mechanical engagement through repeated removal and reinstallation cycles.
Encoder & Feedback
The incremental encoder provides continuous shaft position and speed feedback to the servo drive, enabling closed-loop velocity and position control. Incremental encoders reference position from a home or marker pulse at startup, which is standard practice for machine axis servo systems.
When replacing the A06B-0153-B088, verify that the replacement motor's encoder type and pulse count match the original. Changing encoder resolution without updating servo drive parameters may affect axis position scaling and generate encoder mismatch alarms.
IP65 Protection in Practice
IP65 rating ensures the motor housing is fully sealed against dust ingress and protected against low-pressure water jets from any direction. This provides adequate protection for typical machine tool and automated cell environments including coolant mist, air-blast cleaning, incidental splash, and general airborne contamination.
While a step below IP67 immersion-rated motors, IP65 offers sufficient long-term protection for most auxiliary servo applications. For installations with direct coolant impingement or submersion risk, additional shielding or higher-rated motors should be considered.
Compatibility & Application Context
The 191-230 VAC input voltage range aligns with standard Fanuc servo amplifier DC bus voltages, making this motor compatible with Fanuc servo drive systems. For replacement and retrofit projects, verify servo amplifier output current capacity compatibility with the 11 A continuous current draw and ensure correct motor type parameters in the drive before commissioning.
Given its compact size and modest power rating, the A06B-0153-B088 often serves in critical sub-axis roles where failure significantly impacts machine uptime. Maintaining a vetted spare is recommended for production facilities relying on this motor type for critical applications.
Frequently Asked Questions
Q1: What drive or amplifier is this motor designed to work with?
The A06B-0153-B088 is designed for use with Fanuc servo amplifier modules within the A06B product ecosystem. The amplifier must support the motor's 191-230 VAC input range and be capable of supplying approximately 11 A continuous output current. Always verify the servo drive's motor type parameter is correctly configured before running the axis under load.
Q2: Why is the stall torque so high relative to the output power rating?
Stall torque and continuous output power are different measurements. Stall torque is measured at zero speed and reflects maximum force output at standstill, while continuous output power factors in speed and thermal limits of sustained operation. A high stall-to-power ratio indicates design optimization for holding force, position locking, and low-speed actuation rather than high-speed continuous running.
Q3: What does the keyed shaft offer over a plain straight shaft?
A keyed shaft provides positive mechanical connection between the motor and driven component that cannot slip under torque shock or repeated reversals. For indexing and positioning applications with frequent load direction changes, this offers significant reliability advantages over plain shaft couplings that depend entirely on clamping force.
Q4: Is IP65 sufficient for a coolant-exposed installation?
IP65 provides full dust protection and resistance to low-pressure water jets, covering most incidental coolant exposure in machine tool environments. For locations with direct high-pressure coolant spray or regular submersion risk, IP67 or higher rated motors are more appropriate. Assess motor placement and local shielding during installation planning.
Q5: What should I check when sourcing a used A06B-0153-B088?
Measure three-phase winding resistance across all phases for balanced values. Check insulation resistance from windings to earth. Rotate the shaft by hand to assess bearing condition and verify the keyway is undamaged. Inspect the encoder connector and cable exit for integrity. For units with unknown service history, conduct bench testing including encoder signal verification and no-load run-up to rated speed before installation.
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