June 05, 2026

UAASKA-06WHS11 AC Spindle Motor Product Specification

UAASKA-06WHS11 is a compact three-phase AC external fan-cooled spindle motor manufactured by Yaskawa Electric Japan, belonging to mature UAASKA spindle series specially developed for small-size CNC lathes, engraving & milling machines, miniature vertical machining centers and automated special cutting equipment. This permanent magnet spindle unit is built with high-density laminated silicon steel stator core and optimized rare-earth rotor structure, supporting wide constant-power speed adjustment, stable low-speed high-torque delivery and low-noise high-speed continuous operation to satisfy frequent start-stop, forward-reverse switching and intermittent rough-finish cutting in precision machining scenarios. Equipped with independent external forced air cooling assembly, the motor effectively dissipates heat under long-duration continuous load and avoids overheat shutdown caused by sustained heavy cutting. The suffix WHS11 stands for factory customized configuration including wide-range input specification, high-precision serial feedback encoder and exclusive customized shaft plus flange mounting dimensions; this tailored variant cannot be replaced by standard 06-frame general spindle motors without mechanical rework and drive parameter recalibration. Original mass production of this model has been discontinued, and current available products in market mainly cover surplus original new inventory and professionally refurbished units that complete full aging testing for industrial equipment maintenance replacement.

Description

UAASKA-06WHS11 AC Spindle Motor Product Specification

1. Product Overview

2. Model Code Interpretation

UAASKA is the base series designation of Yaskawa externally cooled AC spindle motor, in which UA represents AC spindle classification, K denotes external forced air cooling design and the final A refers to optimized single-winding internal stator layout. The numeric figure 06 corresponds to standard small frame size with rated continuous output power of 5.5kW under S3 intermittent operation duty cycle. Letter W indicates wide voltage adaptive winding design different from fixed standard voltage versions; H stands for high-resolution specification for position feedback component, and S means serial digital encoder configuration instead of conventional incremental pulse feedback for higher positioning accuracy. The last two digits 11 define exclusive customized mechanical parameters including dedicated output shaft dimension with standard keyway, unique flange mounting hole layout and fixed pin assignment of power & encoder aviation connectors, forming an exclusive OEM customized specification independent from other 06-frame standard spindle products.

3. Core Electrical Specifications

This spindle motor is configured for wide-range three-phase industrial AC input and must be matched with original Yaskawa dedicated spindle servo driver to realize full digital vector closed-loop speed and position control system. Its continuous rated output power reaches 5.5kW with matched rated working current for regular cutting load, and the motor can output up to 2.5 times instantaneous peak overload torque to offset transient cutting impact load during rough machining of aluminum alloy, copper and small-size steel workpieces. The built-in high-precision serial encoder defined by HS coding transmits real-time rotating speed and angular position serial digital signals to paired drive unit, enabling critical CNC functions including rigid tapping, spindle fixed orientation positioning and constant peripheral speed cutting required for precision machining. Stator winding complies with Class F insulation standard with embedded built-in thermal sensing elements; once abnormal overload leads to winding overtemperature, matched drive receives temperature alarm signal and automatically executes output derating or protective shutdown to prevent winding burnout failure. Internal circuit integrates surge suppression components to restrain voltage spike and electromagnetic interference generated by peripheral inverter and switching devices, securing stable running performance under complicated factory power supply fluctuation environment.

4. Mechanical Structure and Environmental Adaptation Requirements

The motor main casing adopts integrated cast aluminum alloy housing with IP54 dustproof and splash-proof protection grade, cooperating with separated external cooling fan for forced convection heat dissipation to upgrade continuous heavy-load thermal management capacity compared with natural cooling spindle motors. Front end features solid integral output shaft with standard flat keyway for rigid assembly with synchronous belt pulley, miniature reduction gearbox or direct-coupled spindle components; rear housing reserves fixed installation position for customized aviation plugs used for power cable and encoder signal wiring following 11 specification wiring definition. Standard flange mounting structure is adopted for equipment assembly to realize direct bolt fastening on machine spindle box without additional transition fixture processing.

Permitted continuous operating ambient temperature ranges from 0°C to +40°C, and storage temperature scope is -20°C to +70°C; applicable working environment humidity keeps 5%RH to 80%RH under non-condensing state to prevent internal metal corrosion and circuit short-circuit faults. If installation altitude exceeds 1000 meters above sea level, users need to appropriately reduce continuous working load to compensate declined heat dissipation efficiency caused by thinner high-altitude air density. The motor can withstand regular industrial vibration within 10Hz~55Hz frequency band, while deployment in working sites with corrosive gas, accumulated oil mist and conductive metal dust is strictly prohibited to extend service lifespan of internal bearing, winding and precision serial encoder components.

5. Application Scope and Routine Maintenance Guidance

UAASKA-06WHS11 is widely used as core spindle driving component for small precision CNC turning centers, mold engraving milling equipment, miniature vertical machining centers and fixed cutting stations on automated production lines, applicable to rough and finish machining of non-ferrous metal, engineering plastic and small-size ferrous metal parts. During daily maintenance, operators need periodic cleaning on external cooling fan filter screen to eliminate dust blockage which would trigger poor heat dissipation and motor over-temperature protection alarm; regular inspection on output shaft bearing lubrication condition and aviation connector wiring tightness is required to avoid oil leakage and loose connection induced abnormal spindle speed fluctuation. For equipment breakdown replacement maintenance, original matching serial encoder and customized dedicated power cables complying with WHS11 specification must be selected; mismatched replacement accessories will result in invalid feedback signal and out-of-control spindle runaway operation. After professional refurbishment, aftermarket spare motors will go through winding high-pot withstand voltage test, rotating part dynamic balance calibration and full-load continuous aging test in accordance with original factory technical standards before delivery to guarantee consistent performance parameters with brand-new original products.

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