Squareframe
Brushless DC Motors

Slotless
Brushless DC Motors

NEMA 17 BLDC

Our compact Nema 17 square frame BLDC motor has a high torque-to-size ratio, making it perfect for applications where space is limited but power is essential.

Ideal for medical devices, CNC machines, and robotics, this motor offers precise control and reliable performance in small-scale projects.

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  Motor Part Number
    42ZWS50X-1
    42ZWS63X-1
    42ZWS75X-1
  
General Information

    
  

    Dimension
    Motor Length (LT)
    mm
    50
    63
    75
  

    Mounting Holes
    mm
    36 (±0.2)
  

    Motor Shaft
    mm
    25 (±0.5)
  

    Pole Pairs
    -
    5
  

    Phase Resistance
    Ω
    2.482
    1.261
    0.987
  

    Phase Inductance
    mH
    1.062
    0.586
    0.434
  

    Winding Connection
    -
    Star
  

    Insulation Class
    -
    B
  

    Duty Type
    -
    S1
  

    Feedback Method
    -
    Hall Sensors
  

    Commutation Angle
    -
    120°
  

    Insulation Strength (Withstand Voltage)
    -
    500VAC/1KHz/1mA/1s
  

    Insulation Resistance
    -
    100 MΩ/500VDC
  

    Weight
    kg
    0.26
    0.38
    0.5
  
Performance Parameters

    
  

    Rated Voltage
    V
    24
    24
    24
  

    Rated Power
    W
    19.6
    39.3
    58.1
  

    Rated Torque
    Nm
    0.0625
    0.125
    0.185
  

    Rated Speed
    RPM
    3000
    3000
    3000
  

    Rated Current
    A
    1.2
    2.4
    3.6
  

    No Load Speed
    RPM
    4000
    4000
    4000
  

    No Load Current Current
    A
    0.15
    0.3
    0.45
  

    Motor Efficiency
    %
    70
    70
    70
  

    Noise (Ambient noise 20db, test distance 1M)
    dB
    < 50
    < 50
    < 50
  
Thermal Parameters

    Enclosure - Ambient Thermal Resistance
    K/W
    0.75
    0.38
    0.25
  

    Motor Thermal Time Constant
    min
    2.3
    3.1
    3.6
  

    Ambient Temperature
    °C
    25
    25
    25
  

    Maximum Winding Temperature
    °C
    68.5
    68.5
    68.5
  
Motor Constant Coefficient

    Torque Constant
    Nm/A
    0.052
    0.052
    0.051
  

    Back-EMF Constant
    Effective Value
    V/Krpm
    5.44
    5.44
    5.44
  
Calculated Values

    Peak Torque
    Nm
    0.1875
    0.375
    0.555
  

    Peak Current
    A
    3.6
    7.2
    10.8
  

    Inertia Moment
    Kgcm²
    0.05
    0.1
    0.15
  
Material

    End Cover
    Aluminum Die Casting
  

    Bearing
    Deep Groove Ball Bearing
  

    Magnet
    Sinter NdFedB
  

    Shaft
    Carbon Steel 40Cr
  