UAASWD-11GMU13 AC Spindle Motor Product Specification
UAASWD-11GMU13 is a heavy-duty externally fan-cooled permanent magnet AC spindle motor manufactured by Yaskawa Electric, belonging to the mature UAASWD spindle series engineered for medium-large vertical machining centers, heavy-duty CNC turning centers, large mold processing equipment and dedicated automated metal cutting production machinery. Constructed with high-density laminated silicon steel stator core and premium rare-earth permanent magnet rotor structure, this spindle unit features an extensive constant-power speed adjustment range, stable high low-speed torque output and low-vibration high-speed continuous running performance. It reliably accommodates frequent forward-reverse rotation cycles, intermittent heavy rough cutting loads and long-hour continuous finish machining for ferrous and non-ferrous metal workpieces. Equipped with an independent external forced-air cooling assembly, the motor maintains consistent thermal dissipation efficiency under sustained full-load working conditions and prevents unintended overheat protection shutdown during intensive heavy cutting tasks. The suffix GMU13 denotes exclusive factory-customized configuration including fixed rated voltage winding layout, multi-turn high-precision feedback encoder and tailor-made dimensional specifications for output shaft and mounting flange. This bespoke variant cannot be directly interchanged with standard 11-frame generic spindle motors without mechanical modification and complete servo drive parameter recalibration. Original mass production of this model has been discontinued, and available market stock mainly consists of leftover original unused inventory and professionally refurbished units that pass full factory-standard aging and performance testing for equipment maintenance replacement.
Description
UAASWD-11GMU13 AC Spindle Motor Product Specification
1. Product Overview
UAASWD-11GMU13 is a heavy-duty externally fan-cooled permanent magnet AC spindle motor manufactured by Yaskawa Electric, belonging to the mature UAASWD spindle series engineered for medium-large vertical machining centers, heavy-duty CNC turning centers, large mold processing equipment and dedicated automated metal cutting production machinery. Constructed with high-density laminated silicon steel stator core and premium rare-earth permanent magnet rotor structure, this spindle unit features an extensive constant-power speed adjustment range, stable high low-speed torque output and low-vibration high-speed continuous running performance. It reliably accommodates frequent forward-reverse rotation cycles, intermittent heavy rough cutting loads and long-hour continuous finish machining for ferrous and non-ferrous metal workpieces. Equipped with an independent external forced-air cooling assembly, the motor maintains consistent thermal dissipation efficiency under sustained full-load working conditions and prevents unintended overheat protection shutdown during intensive heavy cutting tasks. The suffix GMU13 denotes exclusive factory-customized configuration including fixed rated voltage winding layout, multi-turn high-precision feedback encoder and tailor-made dimensional specifications for output shaft and mounting flange. This bespoke variant cannot be directly interchanged with standard 11-frame generic spindle motors without mechanical modification and complete servo drive parameter recalibration. Original mass production of this model has been discontinued, and available market stock mainly consists of leftover original unused inventory and professionally refurbished units that pass full factory-standard aging and performance testing for equipment maintenance replacement.
2. Model Code Definition
UAASWD serves as the base series designation of Yaskawa external forced-air cooled AC spindle motor. UA represents AC spindle product classification, S stands for optimized high-efficiency stator core design, W indicates fixed rated industrial voltage winding specification, and D refers to reinforced heavy-duty mechanical structure for high radial and axial cutting loads. The numeric code 11 corresponds to medium-large frame size with S3 intermittent rated output power of 11kW as the core power rating of this specification. Letter G denotes standard fixed industrial three-phase input winding design; M represents multi-turn absolute high-precision feedback encoder configuration; U stands for customized reinforced heavy-load bearing set against heavy impact cutting force. The final two digits 13 define exclusive OEM customized mechanical parameters including dedicated output shaft dimension with standard flat keyway, unique flange mounting hole layout and fixed pin assignment of aviation connectors for power and encoder signal wiring, forming an independent customized specification distinct from other regular 11-frame spindle products.
3. Electrical Performance Specification
This spindle motor is designed for fixed three-phase industrial AC rated input and must be matched with original Yaskawa dedicated spindle servo driver to build a complete full-digital vector closed-loop speed and position control system. Its intermittent rated output power reaches 11kW with corresponding rated operating current matching heavy-load cutting requirements, and the motor can deliver up to 3 times instantaneous peak overload torque to absorb transient impact load generated during rough machining of cast iron, carbon steel and thick aluminum alloy blanks. The built-in M-type multi-turn absolute encoder defined by GMU coding transmits real-time rotational speed and absolute angular position digital serial signals to the paired servo drive unit, enabling essential CNC core functions such as high-precision rigid tapping, fixed spindle orientation positioning and constant peripheral speed cutting required for precision mold and heavy component machining. Stator winding complies with Class F insulation standard with embedded built-in thermal sensing elements; once sustained abnormal overload causes winding overtemperature, the matched drive receives temperature alarm signals and automatically executes output derating or protective power cutoff to avoid permanent winding burnout damage. Internal circuit integrates surge suppression components to restrain voltage spikes and electromagnetic interference induced by peripheral frequency converters and switching power devices, securing stable running performance under fluctuating factory power grid environments.
4. Mechanical Structure and Environmental Requirements
The motor main housing adopts integrated cast aluminum alloy construction with IP54 dustproof and splash-proof protection grade, paired with a separate external cooling fan module for forced convection heat dissipation to realize superior continuous heavy-load thermal management compared with natural cooling spindle motors. The front end features a solid integral output shaft with GMU13 customized flat keyway for rigid connection with large synchronous belt pulleys, heavy-duty reduction gearboxes or direct-coupled machine tool spindle assemblies; the rear casing reserves fixed installation space for GMU13 exclusive customized aviation plugs following factory fixed pin definition rules for power cable and encoder signal wiring. Standard flange mounting design enables direct bolt fastening onto machine spindle boxes without additional transition fixture machining.
Permitted continuous operating ambient temperature ranges from 0°C to +40°C, while storage temperature spans -20°C to +70°C; applicable working humidity is maintained between 5%RH and 80%RH under non-condensing conditions to prevent internal metal corrosion and circuit short-circuit faults. If installation altitude exceeds 1000 meters above sea level, users must appropriately reduce continuous working load to compensate for degraded heat dissipation efficiency caused by reduced high-altitude air density. The motor withstands conventional industrial vibration within 10Hz to 55Hz frequency range; operation within sites with corrosive gas, accumulated oil mist and conductive metal dust is strictly prohibited to extend the service life of internal bearings, stator winding and precision multi-turn encoder components.
5. Application Range and Routine Maintenance Guidance
UAASWD-11GMU13 is widely deployed as core spindle drive for medium-large vertical machining centers, heavy-duty CNC turning centers, oversized mold engraving & milling equipment and fixed heavy-cut stations on automated production lines, suitable for rough and finish machining of ferrous metal, thick non-ferrous alloy and high-hardness engineering plastic workpieces. During regular maintenance, operators need periodic cleaning of the external cooling fan filter screen to eliminate dust blockage that leads to poor heat dissipation and unexpected over-temperature protection alarms; regular inspection of output shaft bearing lubrication status and aviation connector wiring tightness is required to avoid bearing oil leakage and loose wiring-induced abnormal spindle speed fluctuation. For breakdown replacement maintenance, original matching multi-turn absolute encoder and GMU13-spec exclusive dedicated power cables must be adopted; mismatched replacement accessories will trigger invalid feedback signals and out-of-control spindle runaway faults. After professional refurbishment, aftermarket spare motors undergo winding high-pot withstand voltage testing, rotating part dynamic balance calibration and full-load continuous aging testing per original factory technical standards before delivery to guarantee consistent performance parameters matching brand-new original products.
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