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Allen Bradley 1326 Motors 1326AB-A740B-21-K7

Product image is representative; revision or series may vary. Contact us to request a specific version.

1326AB-A740B-21-K7

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The 1326AB-A740B-21-K7 servo motor is an Allen-Bradley/Rockwell Automation Bulletin 1326 series servo motor that operates with AC voltage. It is equipped with permanent magnet technology that reduces its inertia as it operaties. The 1326AB-A740B-21-K7 servo motor can operate without derating at an ambient temperature of up to 40 degrees Celsius or 104 degrees Fahrenheit. Its continuous stall torque rating is 56.5 N-m or 500 pounds on an inch and its current rating with continuous torque is 38.5 Amps. The 1326AB-A740B-21-K7 servo motor can generate up to 8.3 kilowatts of output power.

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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for 1326AB-A740B-21-K7

ManufacturerAllen Bradley
Product TypeServo Motor
Product Line1326 Motors
Part Number1326AB-A740B-21-K7
Weight32.00 lbs (14.51 kg)
Max. Op. Speed1600 rpm
Frame Diameter194 mm
Rated Motor Speed1600 rpm
Flange and Shaft SeriesIEC Metric Flange with Keyway
Motor Rated TorqueN/A
Motor Rated Output8.3 kW
System Continuous Torque56.5 Nm
System Peak Stall Torque132 Nm
Standard Option41 Nm Holding Brake w/ 24V DC Coil
Product Lifecycle Status*Discontinued/Obsolete

* The Allen Bradley 1326AB-A740B-21-K7 has been discontinued by the manufacturer, however we specialize in obsolete parts and can likely still supply surplus and/or refurbished replacement 1326AB-A740B-21-K7 units instead of migration.

The 1326AB-A740B-21-K7 is a Ferrite AC servo motor from the Allen-Bradley’s Torque Plus series. This servo motor runs on 230 Volts of AC voltage; it can achieve relatively modest Revolution Per Minute rates at 1600 RPM, and this servo motor has a specially designed housing which provides reduced length and increased torque for the device. The stall torque of this motor is around 56.5 N-m (500 pounds on an inch) and it gives 8.3 kW at its output. An IEC Metric Flange is used to mount this device, which has keyway on its shaft. The Allen-Bradley 1326AB-A740B-21-K7 has a 194 millimeter (5.88 inch) frame diameter. The special feature of this Torque Plus series AC drive is 45.2 N-m (400 pounds on an inch) while the spring-set holding brake has a 24 Volt DC actuated coil. A brushless resolver is integrated into the housing, that ensuring durability in harsh environments. This module is guaranteed to safely endure shocks and high ambient temperatures and the resolver supplies position feedback information; the resolution is also adjustable from 512 to 2048 ppr.

Allen-Bradley’s 1391-DES AC Servo Drive is used to control this type of servo motor. This 1391 series control modules should be used with the 1326AB-A740B-21-K7 servomotor for control purposes and to enable this servomotor to reach its optimal performance; one of the advantages for this AC servo motor is that it can be mounted either horizontally or vertically, or generally by any angle. The 1326AB-A740B-21-K7 should be kept in a robust IP65 rated enclosure. There are two thermal switches connected in the series (1A relay contact) for thermal overload signaling and this thermal overload relay is activated when the motor temperature exceeds 155 degrees Celsius (311 degrees Fahrenheit) ±10%. The approximate weight of this device is 14.515 kilograms. The dimensions of the device are 207.5 millimeters (8.17 inches) x 207.5 millimeters (8.17 inches) x 498.2 millimeters (19.61 inches).

Revision Part #Also known as
1326AB-A740B-21-K7 Ser A1326AB-A740B-21-K7/A, Series A, Rev A
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