A06B-0078-B503 FANUC Beta iS 12/3000 Servo Motor with Keyed Shaft Brake

Buy online your FANUC Beta iS 12/3000 Servo Motor with Keyed Shaft Brake reference A06B-0078-B503 from our e-store Cnc-shopping, specialist in CNC machine-tools spare parts.

This FANUC A06B-0078-B503 is a Beta iS 12/3000 AC servo motor designed for precision feed and positioning axes on FANUC CNC machine tools. It provides controlled rotary motion for machining centers, turning machines, loaders, and auxiliary axes where accurate positioning and reliable operation are required.

The motor is rated at 1.8 kW continuous output, 138 V, 8 A, and 133 Hz, with a specified speed of 200 rpm. Its keyed shaft provides secure mechanical coupling, while the integrated holding brake helps maintain axis position when the machine is stopped or powered down.

Designed for closed-loop operation with compatible FANUC βi series servo amplifiers, this motor is suitable for CNC feed axes and positioning applications. The Beta iS 12/3000 specification helps maintenance teams identify the correct motor class when replacing a failed or worn unit.

This FANUC servo motor is suitable as a replacement unit, CNC replacement component, or industrial spare part for maintenance, retrofit, and machine rebuild projects. Keeping a tested motor in stock can help reduce downtime caused by encoder faults, brake problems, bearing wear, or other motor-related failures.

Made in Japan, the A06B-0078-B503 can be supplied as a tested unit with commercial warranty, protective industrial packaging, and worldwide shipping. Fast dispatch is available depending on inventory, with repair service, exchange service, and sourcing of obsolete parts available when applicable.

Frequently asked questions about A06B-0078-B503 :

Which amplifier should be used with this motor?
Use FANUC servo amplifiers intended for the βi series. Match the amplifier current rating and interface to the 12/3000 class specified on the machine documentation and the original motor nameplate.

Does this version include a holding brake?
Yes, this configuration includes an integrated holding brake suitable for axes that must hold position at stop or power off. Confirm brake control wiring and settings with the machine’s electrical diagrams.

What is the shaft configuration?
It features a keyed output for positive coupling to pulleys, couplings or gearboxes. Verify key and bore dimensions against the existing hub before installation to ensure a clean drop-in fit.

Is it a direct drop-in replacement for any 12/3000 motor?
It is intended to replace units within the FANUC βiS 12/3000 family with the same mechanical, electrical and feedback interface. Always check flange size, connector style, rated speed class and brake requirement against the original specification.