The Allen-Bradley 1326AS-B660E-21 (Part Number 163575) is a high-performance AC servo motor from the Bulletin 1326 series. Engineered for high-torque applications within industrial automation, this motor is designed to provide precise motion control when paired with Allen-Bradley servo drives. The “AS” designation signifies a high-torque-to-inertia ratio, making it an ideal choice for systems requiring rapid acceleration and deceleration without sacrificing stability.

Product Parameters and Technical Specifications

This motor is built to rigorous industrial standards to ensure consistent performance in heavy-duty cycles.

• Model Number: 1326AS-B660E-21 / 163575
• Series: Bulletin 1326 High-Torque AC Servo
• Rated Speed: 3000 RPM
• Frame Size: 149mm (6-inch) Bolt Circle
• Voltage Class: 460V AC
• Feedback Type: Integrated resolver for robust position and speed sensing
• Enclosure Rating: IP65 (dust-tight and protected against water jets)
• Brake Option: This specific configuration may include an optional 24V DC holding brake (verify “21” suffix in the 1326 series catalog for exact factory-installed options).

 

Product Datasheet Summary

The 1326AS-B660E-21 datasheet highlights its brushless design, which significantly reduces maintenance requirements by eliminating brush wear. The motor features high-energy rare-earth magnets that provide superior torque density. Its thermal management system is designed for natural convection cooling, though it can be integrated into forced-air systems for enhanced duty cycles. The resolver feedback provides high-resolution data to the drive, ensuring smooth low-speed operation and precise positioning.

 

Country of Origin

This product is manufactured in the USA, maintaining the high engineering and quality control standards associated with the Rockwell Automation / Allen-Bradley brand.

 

Application Fields

The 1326AS series is a staple in precision-heavy industries, including:

• Automotive Manufacturing: Used in robotic welding arms and assembly line positioning.
• Material Handling: Driving high-speed sorters and palletizing systems.
• Metalworking: Powering CNC feed axes and indexing tables.
• Packaging: Essential for synchronized labeling, filling, and wrapping machinery.

 

Product Usage Instructions

1. Alignment: Ensure precise shaft alignment with the load to prevent premature bearing failure and vibration.
2. Wiring: Use shielded power and feedback cables to minimize electromagnetic interference (EMI). Connect the resolver to the drive’s feedback port and the power leads to the motor output terminals.
3. Grounding: The motor frame must be properly grounded to the system backplane to ensure safety and signal integrity.
4. Environmental Care: While rated IP65, avoid direct high-pressure steaming on the connector seals to maintain the longevity of the internal windings.

 

Technical Description

The Bulletin 1326AS motors utilize a permanent magnet rotor design. The three-phase windings in the stator produce a rotating magnetic field that stays in perfect synchronicity with the rotor’s magnetic field. The 3000 RPM rating represents the maximum mechanical speed at which the motor can operate safely while maintaining its rated torque. The “B” in the model string typically denotes a 460V winding, while the “660” indicates the specific stack length and torque capability of the 149mm frame.

 

Q&A – Frequently Asked Questions

Q: Can this motor be used with a standard VFD? A: No, this is a permanent magnet synchronous AC servo motor. It requires a dedicated servo drive (such as an Allen-Bradley 1394 or Ultra3000 series) that can interpret the resolver feedback and provide commutation.

Q: What is the benefit of a resolver over an encoder? A: Resolvers are much more rugged and resistant to heat, shock, and vibration, making them better suited for the harsh industrial environments where 1326 motors are typically found.

Q: Is the 163575 part number different from the model number? A: No, the 163575 is the internal factory part number used by Rockwell Automation to identify this specific 1326AS-B660E-21 configuration.

Q: Where can I find more Bulletin 1326 parts? A: You can find the Allen-Bradley 1326AS-B660E-21 and other legacy servo components through specialized industrial automation inventory providers.

 

Recommended Similar Models

1. Allen-Bradley 1326AS-B410G-21 – A smaller frame variant for lower torque requirements.
2. Allen-Bradley 1326AS-B640E-21 – Same frame size but with a shorter stack length for different inertia needs.
3. Allen-Bradley 1326AB-B520E-21 – The “AB” variant, typically offering different torque-speed curves for specific applications.
4. Allen-Bradley MPL-B580J-MJ72AA – A modern MP-Series equivalent for upgrading legacy 1326 systems.
5. Allen-Bradley 1326AS-B860E-21 – A larger frame size for significantly higher torque demands.