1326AS‑B440G‑21‑K4/A is a low‑inertia high‑speed AC servo motor from the A‑B Bulletin 1326AS product family, configured with K4 spring‑actuated 24V DC holding brake and A‑revision hardware for vertical‑axis or position‑holding motion‑control occasions. As core executing hardware of automation motion systems, it adopts permanent‑magnet brushless synchronous structure, converting electrical control signals from matched servo drives into accurate rotary mechanical motion to realize positioning, speed and torque control tasks. The integrated resolver feedback delivers stable position detection, performing well under shock‑prone and wide‑temperature industrial environments. The built‑in holding brake provides static shaft retention upon power loss, preventing accidental axis dropping for vertical mechanical structures. Its stable dynamic performance directly determines positioning accuracy and operational safety of the whole mechanical equipment.

Constructed with premium rare‑earth permanent‑magnet materials and TENV totally‑enclosed non‑ventilated rugged housing with IP65 protection grade, 1326AS‑B440G‑21‑K4/A can withstand typical industrial‑site disturbances including mechanical vibration, dust splash and moderate ambient temperature variation. Optimized low‑inertia rotor design enhances acceleration‑deceleration dynamic response, maintaining steady torque output under frequent start‑stop working conditions. Every finished motor undergoes dynamic balance calibration, insulation inspection, brake function verification and long‑duration aging test before shipment. Rigorous multi‑step quality‑control procedures guarantee consistent torque performance and high interchangeability with original hardware. When the original servo motor suffers winding burnout, feedback failure, brake malfunction or mechanical damage, users can implement direct replacement with 1326AS‑B440G‑21‑K4/A, shortening equipment maintenance cycle and mitigating production losses caused by axis shutdown.

This AC servo motor fits diverse industrial‑application scenarios, covering CNC processing machinery, vertical material‑handling stations, automated assembly equipment and general‑purpose high‑speed motion‑control mechanical devices. It supports matching with classic A‑B 1394 drive platforms to construct complete motion‑control solutions. Built‑in thermal sensor offers over‑temperature protection for motor windings, and the K4 holding brake undertakes static position‑locking function instead of dynamic braking, avoiding misuse under high‑speed running status. During installation and commissioning, precise coupling alignment must be guaranteed, and brake control wiring shall strictly follow official specifications. Keep the motor away from corrosive gas, heavy dust and high‑humidity surroundings. Complying with official wiring and installation specifications can maximize motor performance and extend its service life.

For equipment overhaul, technical renovation and spare‑parts inventory preparation, 1326AS‑B440G‑21‑K4/A provides a dependable brake‑equipped high‑speed servo‑motor spare‑part solution for A‑B automation systems. After replacement and full parameter debugging of matched servo drive, it restores accurate multi‑axis motion‑control and power‑loss holding capability and reduces long‑term operational risks. Professional technicians are recommended to complete mechanical alignment, power‑and‑feedback wiring, brake function test and trial‑run testing work to achieve perfect matching between motor and drive and obtain expected operating results.