June 05, 2026

UAASWH-06CMU45 AC Spindle Motor Specification (Yaskawa External Air-Cooled Permanent Magnet Spindle Motor)

UAASWH-06CMU45 is a medium-small frame forced air-cooled AC permanent magnet spindle motor from Yaskawa UAASWH series, customized for small vertical machining centers, compact CNC lathes, precision engraving & milling machines and automated small-component cutting stations. Its core S3 intermittent rated power is 5.5kW, continuous S1 rated power 3.7kW, standard base speed 850rpm, maximum high-speed up to 15,000rpm under three-phase 200V input condition. Equipped with independent external blower forced air cooling system, the unit realizes stable heat dissipation under continuous intermittent cutting load, avoiding over-temperature shutdown during long-term finish machining of aluminum alloy, copper, mold steel and engineering plastic blanks. Suffix CMU45 represents exclusive OEM custom configuration: C-type dedicated voltage matching winding, built-in multi-turn absolute serial encoder, reinforced heavy-duty bearing set and non-standard customized mechanical dimensions marked by tail code 45 for shaft, keyway, flange mounting and aviation plug pin definition; this customized specification cannot be directly replaced by standard UAASWH-06 universal spindle motors without mechanical reworking and servo parameter full reset. Original new production has been discontinued, current market supply is surplus original stock and factory-refurbished motors passing aging test, dynamic balance calibration and high-pot withstand voltage inspection before aftermarket replacement.

Description

UAASWH-06CMU45 AC Spindle Motor Specification (Yaskawa External Air-Cooled Permanent Magnet Spindle Motor)

1. Product Overview

Suffix CMU45 represents exclusive OEM custom configuration: C-type dedicated voltage matching winding, built-in multi-turn absolute serial encoder, reinforced heavy-duty bearing set and non-standard customized mechanical dimensions marked by tail code 45 for shaft, keyway, flange mounting and aviation plug pin definition; this customized specification cannot be directly replaced by standard UAASWH-06 universal spindle motors without mechanical reworking and servo parameter full reset. Original new production has been discontinued, current market supply is surplus original stock and factory-refurbished motors passing aging test, dynamic balance calibration and high-pot withstand voltage inspection before aftermarket replacement.

2. Model Code Definition

UAASWH: Base series code for Yaskawa externally air-cooled three-phase AC spindle motor

UA = AC spindle classification; S = high-density laminated optimized stator core; W = standard three-phase industrial winding structure; H = lightweight reinforced cast housing design for compact machine installation
06 = Frame size code, corresponding to nominal 5.5kW(S3)/3.7kW(S1) rated power grade
C = Custom narrow-range winding tailored for regional 200V industrial power grid fluctuation matching
M = Built-in multi-turn absolute high-resolution serial feedback encoder for spindle positioning and rigid tapping control
U = Upgraded anti-impact heavy-duty rolling bearing assembly for frequent start-stop and intermittent rough cutting
45 = Exclusive custom mechanical specification code: unique output shaft dimension, flat key size, irregular flange hole layout and fixed pin assignment for power & encoder aviation connectors, independent custom specification different from CMU11/CMUA3 variants

3. Electrical Performance Parameters

Designed for three-phase AC 200V input, must pair with original Yaskawa dedicated spindle servo driver to build full digital vector closed-loop speed & position control system.

Rated current: 43.4A(S3)/32.7A(S1), up to 300% instantaneous peak overload torque for transient cutting impact absorption
Built-in M-type multi-turn absolute encoder continuously transmits real-time speed and absolute spindle angle digital signal to driver, supporting rigid tapping, spindle orientation, constant peripheral speed turning and all core precision CNC functions
Stator winding adopts Class F international insulation grade, embedded built-in thermal sensing probes; over-temperature triggers drive power derating or safety cutoff to prevent winding burnout; built-in surge suppression circuit resists factory grid spike and surrounding inverter electromagnetic interference
Protection grade IP44 (JP44 standard), anti-dust and splash-proof for common workshop oil mist environment

4. Mechanical Structure & Application Environmental Requirement

Motor housing is integral lightweight high-strength cast aluminum alloy with split independent external cooling fan assembly for forced convection cooling, better continuous-load heat resistance than natural cooling spindle models. Front end solid one-piece customized output shaft with exclusive CMU45-spec flat keyway for direct coupling with small pulley, reduction gear or machine spindle; rear casing reserves dedicated installation space for CMU45 exclusive customized aviation plug following fixed pin definition for power and encoder wiring, standard flange direct bolt mounting without extra transition fixture.

Continuous operating ambient temperature: 0℃ ~ +40℃; storage temperature: -20℃ ~ +70℃
Working humidity: 5%~80%RH non-condensing; installation altitude over 1000m needs proper load derating due to thinner air and degraded heat dissipation
Withstands industrial vibration 10~55Hz; prohibited for sites with corrosive gas, dense oil mist and scattered conductive metal scrap to protect encoder, bearing and internal winding lifespan

5. Application Scope & Daily Maintenance Standard

Application

Main drive unit for compact vertical machining centers, small CNC turning machines, precision mold engraving & milling equipment and automatic small part cutting stations; suitable for rough cutting and finish machining of non-ferrous alloy, small-size tool steel and high-precision plastic workpieces.

Maintenance Guidance

Regularly clean external cooling fan filter screen to avoid dust clogging causing poor heat dissipation and over-temperature protection stop
Periodically inspect front bearing lubrication status and aviation connector tightening to eliminate oil leakage and loose wiring induced unstable spindle rotation
For breakdown replacement, only original CMU45 dedicated encoder and matching power cable are allowed; mismatched non-standard accessories lead to feedback failure or spindle runaway fault
Refurbished spare motors complete winding high-voltage withstand test, rotating part dynamic balance correction and full-load continuous aging test per factory standards before delivery to match original performance index

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