FANUC A06B-0142-B177 – 200V-class α Series AC Servo Motor for Precision CNC Axes

The FANUC A06B-0142-B177 is a proven α-series AC servo motor, commonly used on machining centers and CNC lathes where smooth torque, tight positioning, and drop-in compatibility matter. From my experience, this variant is the “2000 rpm class” motor many OEMs spec for X/Y/Z axes on mid-sized machines. The B177 option typically indicates a straight keyed shaft with a holding brake and FANUC serial pulse coder feedback—ideal for vertical axes and safety-critical stops.

Company’s Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery: 1 week for in-stock; no more than one month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express delivery: FedEx, UPS, DHL

Key Features

• 200V-class α-series motor – Designed to run with FANUC α/αi servo amplifiers for stable torque and quick response.
• B177 configuration – Typically includes a straight, keyed shaft and an integrated holding brake for vertical axes or safety holding.
• FANUC serial pulse coder – Robust encoder feedback (serial type) for high-resolution positioning and smooth low-speed control.
• Mechanical drop-in fit – Common α-series flange pattern and connector layout helps reduce retrofit time on existing FANUC-equipped machines.
• Industrial protection – IP-rated front end with oil seal options for use in coolant and chip-laden environments (typical machine-tool duty).
• Service-friendly – Clear U/V/W power leads, brake leads, and encoder connector make field replacement straightforward in most cases.

Technical Specifications

Application Fields

You’ll typically find the A06B-0142-B177 on:

• CNC machining centers and drilling/tapping machines (X/Y/Z feed axes)
• CNC lathes and mill-turns (turret or linear axes)
• Robotics and automation fixtures requiring precise, holding-brake-equipped axes
• Retrofits for legacy FANUC α-series systems where fast, drop-in replacement is crucial

One thing I appreciate is how quickly maintenance teams can swap this motor with its like-for-like connectors. A Tier-1 machining line told us they returned a vertical Z-axis to service in under an hour after a planned motor change—zero surprises during homing and backlash checks.

Advantages & Value

• Reliability under load – Built for machine-tool duty; smooth torque delivery at low speed reduces chatter and finish issues.
• Compatibility – Works with FANUC α/αi servo amplifiers and CNC controls commonly found on Japanese and European machines.
• Lower downtime – Mechanical and electrical drop-in fit means less rewiring and fewer parameter changes.
• Cost control – In many cases, reusing your existing amplifier/cables is feasible; no need to redesign the axis drive.
• Technical support – We can share motor outline drawings, connector pinouts, and alignment tips to shorten your maintenance window.

Installation & Maintenance

• Cabinet and environment – Keep the amplifier in a ventilated control cabinet; target 0–40°C ambient, clean/dry air flow.
• Mounting – Ensure the flange face is clean and true; align couplings to avoid radial load on the motor bearings. Use the correct pilot fit.
• Wiring – Route U/V/W power separately from encoder/brake lines; confirm ground continuity. Brake typically requires 24 VDC.
• Safety – Lockout/tagout before handling; the brake can engage suddenly on power loss—support the axis during service.
• Commissioning – Perform zero-return and backlash checks; verify encoder orientation and motor parameters in the CNC/drive.
• Routine care – Inspect connectors/seals, clean chips/coolant residue, and verify cabinet filters. Firmware/parameters on the drive should be backed up after tuning.

Quality & Certifications

• Manufacturing standards: ISO 9001 quality system (manufacturer)
• Compliance: CE and UL for applicable motor families; RoHS alignment typical for current production
• Warranty: 12 months (365 days) from delivery

If you’re replacing an existing α-series motor, share your current amplifier model and machine make. We’ll verify the B177 option set (shaft, brake, encoder) and confirm fit so your team isn’t guessing during installation.