ALLEN BRADLEY 1326AB-B430G-21 Servo motor NO Holding Brake

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The Allen-Bradley 1326AB-B430G-21 is a brushless AC servo motor from the 1326AB Torque Plus Series, designed for precision motion control in CNC machine tools and industrial automation systems. It provides accurate positioning, stable torque delivery, and reliable speed control when paired with compatible Allen-Bradley motion drives and controllers.

This motor is a permanent magnet AC servo motor rated at 2.3 kW, with a maximum speed of 5000 rpm and a continuous torque of 6.4 Nm. Operating on 380/460 VAC, it draws between 4.5 and 5.6 A, making it suitable for a wide range of feed-axis and positioning applications. The motor features a 108 mm frame diameter and an IEC metric flange with keyed shaft, allowing straightforward integration into existing machine designs and retrofit projects.

The 1326AB-B430G-21 is supplied without a holding brake, making it particularly suitable for horizontal axes or applications where braking is provided externally. When installed with the appropriate Allen-Bradley servo drive, it delivers smooth contouring, rapid indexing, and precise closed-loop control for machining centers, CNC lathes, material-handling systems, gantry equipment, and automated production machinery.

As part of the widely installed Allen-Bradley 1326AB family, this motor is commonly used as a replacement unit for legacy Rockwell Automation motion systems. Maintenance teams frequently select this model to replace motors affected by bearing wear, encoder faults, winding failures, or reduced performance. Matching the complete part number ensures compatibility with the original feedback device, winding configuration, and mechanical mounting arrangement, allowing a fast and reliable replacement with minimal commissioning effort.

Manufactured in the United States, the Allen-Bradley 1326AB-B430G-21 is recognized for its durability and long service life in demanding industrial environments. It remains a valuable spare part for maintaining older CNC and automation systems, helping reduce downtime and extend the operational life of existing equipment.

Frequently asked questions about 1326AB-B430G-21:

Does this motor include a holding brake
No. This variant is supplied without a holding brake. For vertical axes or applications needing holding torque at power off, use a brake-equipped version or an external mechanical brake as defined by your machine design.

What drives is this motor commonly paired with
It is commonly used with legacy Allen-Bradley motion platforms from the same era when the feedback and cabling match the original build. Always verify the complete code, feedback type and connector style against your installed drive.

How can I confirm drop-in compatibility
Match the full nameplate code, feedback device, connector orientation and shaft details to your existing motor and machine documentation. If those elements align, technicians generally achieve a straightforward swap with minimal parameter changes.

Is this a good option for retrofit work
Yes, it is often used in retrofit and maintenance projects where the machine already uses 1326AB motors. Confirm mechanical fit, feedback type and electrical ratings with the target drive before finalizing the retrofit plan.