UAASWD-11SMU11 AC Spindle Motor Product Specification
UAASWD-11SMU11 is an externally forced air-cooled permanent magnet AC spindle motor manufactured by Yaskawa Electric under the mature UAASWD product lineup, customized for medium-sized vertical machining centers, precision CNC turning machines, medium mold processing equipment and dedicated fixed cutting stations on automated metalworking production lines. This spindle motor adopts high-density laminated silicon steel stator core and high-performance rare-earth permanent magnet rotor layout, featuring wide constant-power speed regulation scope, stable low-speed high torque output and ultra-low vibration high-speed running performance to satisfy frequent forward-reverse rotation switching, intermittent rough cutting and long-term continuous finish machining of ferrous metals, non-ferrous alloys and precision engineering plastic blanks. Equipped with an independent external cooling fan assembly for forced convection heat dissipation, the unit effectively avoids overheat-triggered protective shutdown under long-duration full-load operating status during continuous medium-load cutting processing. The suffix SMU11 represents exclusive OEM customized configuration including special optimized narrow-range input winding, high-precision serial multi-turn absolute encoder and tailor-made dimensional parameters for output shaft, keyway and mounting flange structure. This bespoke specification variant cannot be directly replaced by standard 11-frame universal spindle motors unless corresponding mechanical refitting and complete servo drive parameter resetting are fully finished. Mass original new production of this model has been stopped, and available market supply mainly includes surplus original unused inventory and professionally refurbished motors which pass full factory-standard aging, dynamic balance and electrical withstand voltage verification before aftermarket equipment maintenance replacement.
Description
UAASWD-11SMU11 AC Spindle Motor Product Specification
1. Product Overview
UAASWD-11SMU11 is an externally forced air-cooled permanent magnet AC spindle motor manufactured by Yaskawa Electric under the mature UAASWD product lineup, customized for medium-sized vertical machining centers, precision CNC turning machines, medium mold processing equipment and dedicated fixed cutting stations on automated metalworking production lines. This spindle motor adopts high-density laminated silicon steel stator core and high-performance rare-earth permanent magnet rotor layout, featuring wide constant-power speed regulation scope, stable low-speed high torque output and ultra-low vibration high-speed running performance to satisfy frequent forward-reverse rotation switching, intermittent rough cutting and long-term continuous finish machining of ferrous metals, non-ferrous alloys and precision engineering plastic blanks. Equipped with an independent external cooling fan assembly for forced convection heat dissipation, the unit effectively avoids overheat-triggered protective shutdown under long-duration full-load operating status during continuous medium-load cutting processing. The suffix SMU11 represents exclusive OEM customized configuration including special optimized narrow-range input winding, high-precision serial multi-turn absolute encoder and tailor-made dimensional parameters for output shaft, keyway and mounting flange structure. This bespoke specification variant cannot be directly replaced by standard 11-frame universal spindle motors unless corresponding mechanical refitting and complete servo drive parameter resetting are fully finished. Mass original new production of this model has been stopped, and available market supply mainly includes surplus original unused inventory and professionally refurbished motors which pass full factory-standard aging, dynamic balance and electrical withstand voltage verification before aftermarket equipment maintenance replacement.
2. Model Code Definition
UAASWD is the base series identifier of Yaskawa external air-cooled AC spindle motor, where UA stands for AC spindle classification, S denotes optimized high-efficiency stator core structural design, W refers to fixed industrial rated three-phase winding configuration, and D represents reinforced heavy-duty mechanical framework optimized for improved radial and axial load resistance against cutting impact. The numeral 11 defines medium frame size with S3 intermittent rated output power of 11kW as the core rated power grade of this specification. Letter S indicates optimized narrow-specification winding tailored for fixed regional industrial power grid voltage; M stands for multi-turn absolute high-resolution feedback encoder built inside the motor; U means upgraded reinforced heavy-duty bearing assembly for anti-impact cutting working scenarios. The last two digits 11 correspond to exclusive customized mechanical parameters covering dedicated output shaft dimension and flat keyway size, unique flange mounting hole layout and fixed pin assignment of aviation connectors for power cable and encoder signal wiring, forming an independent customized specification different from other regular 11-frame spindle motor variants.
3. Electrical Performance Specification
This spindle motor is designed for fixed three-phase industrial AC input and requires matching original dedicated Yaskawa spindle servo driver to construct full-digital vector closed-loop speed and position control system. Its S3 intermittent rated output power hits 11kW with matched rated operating current customized for medium to heavy cutting load conditions, and the motor can deliver up to three times instantaneous peak overload torque to buffer sudden impact load generated during rough machining of cast iron, medium-carbon steel and thick aluminum alloy workpieces. The built-in M-type multi-turn absolute encoder defined by SMU coding continuously transmits real-time spindle rotational speed and absolute angular position digital serial signals to the matched servo drive unit, fully supporting core CNC machining functions such as high-precision rigid tapping, automatic fixed spindle orientation positioning and constant peripheral speed cutting required for precision mold and medium-size mechanical component production. Internal stator winding conforms to Class F international insulation standard and is pre-installed with embedded temperature sensing probes; once sustained abnormal overload causes winding overtemperature, the paired drive receives real-time temperature alarm signals and automatically executes output power derating or safety power cutoff to prevent permanent winding burnout damage. Integrated surge suppression circuits inside the motor restrain instantaneous voltage spikes and complex industrial electromagnetic interference induced by surrounding frequency converters and switching power equipment, ensuring stable continuous operation under fluctuating factory power grid environment.
4. Mechanical Structure and Environmental Application Requirements
The motor main casing is manufactured from integrated high-strength cast aluminum alloy with standard IP54 dustproof and splash-proof protection rating, cooperating with split independent external cooling fan module to realize efficient forced air heat dissipation, owning far superior continuous heavy-load thermal endurance compared with natural cooling spindle motors. The front end is equipped with solid integral customized output shaft with exclusive SMU11-spec flat keyway for rigid assembly with medium-size synchronous belt pulley, reduction gearbox or direct-coupled machine tool spindle components; the rear housing reserves fixed installation space for SMU11 exclusive customized aviation plugs following factory fixed pin definition rules for power wiring and encoder signal connection. Standard flange mounting structure is adopted for machine assembly to realize direct bolt locking on machine spindle box without extra transition fixture processing.
Valid continuous working ambient temperature ranges from 0°C to +40°C, while permissible long-term storage temperature covers -20°C to +70°C; applicable working environment relative humidity is controlled between 5%RH and 80%RH under non-condensing condition to avoid internal metal rusting and internal circuit short-circuit failures. When installation altitude exceeds 1000 meters above sea level, users need to properly reduce continuous operating load to compensate heat dissipation decline brought by decreased air density at high altitude. The motor can endure regular industrial vibration within 10Hz to 55Hz frequency range, while installation and running in working sites with corrosive chemical gas, accumulated heavy oil mist and scattered conductive metal scraps are strictly forbidden to extend service life of internal rolling bearings, stator winding and precision multi-turn encoder components.
5. Application Scope and Routine Maintenance Specification
UAASWD-11SMU11 is widely deployed as core spindle driving component for medium-sized vertical machining centers, medium-load CNC turning centers, medium-size mold engraving and milling machines and fixed medium-duty cutting processing stations on automated production lines, suitable for rough machining and finish precision processing of ferrous metal blanks, medium-thickness non-ferrous alloy workpieces and high-hardness industrial engineering plastic parts. During daily routine maintenance, equipment operators need regular cleaning for external cooling fan filter screen to eliminate dust clogging which would cause poor heat dissipation and unexpected over-temperature protection shutdown; periodic inspection on output shaft bearing lubrication state and aviation connector wiring fastening degree is required to avoid bearing oil leakage and loose wiring induced irregular spindle speed fluctuation. For breakdown replacement maintenance on production equipment, original matching multi-turn absolute encoder and exclusive SMU11-spec dedicated power cables must be selected; mismatched non-original replacement accessories will trigger invalid feedback signal and even out-of-control spindle runaway fault. All aftermarket refurbished spare motors will complete winding high-pot withstand voltage test, rotating component dynamic balance calibration and full-load continuous aging test in accordance with original factory technical standards before delivery to guarantee consistent performance parameters matching brand-new original specification products.
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