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42mm Slotless Brushless Motor for High-Performance Motion Systems

Modar'sSlotlessBrushlessDCMotorscanavoidthepulsationofairgapmagneticinductioncausedby unevenmagnetic resistance in the teeth.
It can eliminate the pulse loss in the armature core and the surface loss on the main pole surface.
Slotless Brushless DC Motor has high durability, low electrical noise and high efficiency. Maximum efficiency of motor reaches 91% and this motor is suitable for the servo system which needs quick movement and high power.

  • 42ZWWC80

  • Modar Motor

  • 42mm

  • 66-160W

  • 90-180mN.m

  • 18-48V.

  • 100% pure copper

  • 2

  • about 30 days

Availability:
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42mm Slotless Brushless DC Motor – Product Overview


The 42mm slotless brushless dc motor represents the largest and most powerful frame size within the compact slotless motor family.
42mm slotless brushless dc motor is designed for applications that demand high torque, precise motion control, and long-term reliability, while still benefiting from zero cogging torque.


brushless slotless dc motor


Key Features

  • Highest torque output in the slotless series

  • Smooth and stable motion control

  • Robust design for demanding environments

  • Low vibration and noise

  • Custom voltage and winding configurations

  • Industrial and robotic-grade durability



Typical Applications of 42mm Slotless Brushless DC Motor


42mm slotless brushless dc motor is ideal for high-performance motion systems.


Typical application areas:

  • Industrial automation equipment

  • Robotic joints and actuators

  • Precision pump and fluid control systems

  • High-load positioning platforms


Application Highlights

  • Excellent torque stability under high load

  • Reduced mechanical stress on system components

  • High motion precision for advanced control

  • Suitable for long-term industrial deployment




Technical Specifications of 42mm Slotless Brushless DC Motor


The following technical data applies to the 42mm slotless brushless DC motor.

Electrical Parameters

  • Rated voltage options: 18-48V.

  • Rated speed: 5400-12200rpm(customized)

  • Rated Torque: 90-180mN.m(customized)

  • Output power: 66-160W(customized)

Optional Configurations

  • Hall sensors or encoder feedback

  • Customized shaft or connector types

  • Cable or terminal variations


Slotless motor.pdf

     

 Motor Characteristics
Motor part number 42ZWWC80
Pole pairs - 1  1  1  1  2 
Terminal resistance,
Phase-Phase		 Ω 0.4  0.45  0.6  0.95  0.22 
Terminal inductance,
Phase-Phase		 mH 0.085  0.14  0.14  0.23  0.035 
Winding connection
method		 - Star connection Star connection Star connection Star connection Star connection
Insulation class - B B B B B
Duty type - S2 S2 S2 S2 S1
Feedback method - Hall sensors Hall sensors Hall sensors Hall sensors Hall sensors
Commutation angle - 120° 120° 120° 120° 120°
Insulation strength
(Withstand voltage)		 - 500VAC/1KHz/1mA/1s
Insulation resistance - 100MΩ/500VDC
Weight g 500  500  500  500  500 
Rated voltage V 18  24  36  48  24 
Rated power W 66  80  100  160  102 
Rated torque mN·m 90  90  90  120  180 
Rated speed RPM 6678  8346  11619  12200  5400 
Rated current A 4.89  4.17  3.47  4.17  5.70 
No load speed RPM 9000  11000  13000  13800  6800 
No load current A 0.6  0.69  0.6  0.58  0.42 
Motor efficiency % 75  80  80  80  87.9 
Noise (Ambient noise 20dB,
test distance 1m)		 dB <50 <50 <50 <50 <50
Thermal Resistance
(No-load)		 K/W 0.43  0.50  0.67  0.26  0.41 
Thermal Time Constant
(No-load)		 S 900  1620  2040  2040  1340 
Ambient temperature ℃ 23.1  23.5  23  23  22.6 
Max winding temperature
(No-load)		 ℃ 51.5  63.7  90  90  72.1 
Torque constant mN·m/A 18.41  21.60  25.92  28.80  31.58 
Back-EMF constant -
peak value		 V/Krpm 2.73  3.20  3.84  4.26  4.68 
Back-EMF constant -
effective value		 V/Krpm 1.93  2.26  2.71  3.02  3.31 
Peak torque mN·m 828.41  1152.00  1555.20  1455.16  3444.98 
Peak current A 45  53  60  51  109 
Rotor inertia g·cm² 96.3  96.3  96.3  96.3  96.3 
Mechanical time constant ms 11.37  9.29  8.60  11.03  2.12 
End bell - Stainless steel
Bearing - Deep groove ball bearing
Magnet - Sinter NdFeB
Rotation shaft - Carbon steel


Dimension Drawing of 42mm slotless brushless motor 42ZWWC80
42mm slotless brushless dc motor drawing
Performance Curve of 42mm slotless brushless motor 42ZWWC80
42mm slotless brushless dc motor 36V performance curve
42mm slotless brushless dc motor 24V performance curve



FAQ –42mm Slotless Brushless DC Motor


Q1: Is 42mm slotless brushless dc motor suitable for heavy-duty industrial use?

Yes, 42mm slotless brushless dc motor is designed for high-load applications.


Q2: Can 42mm slotless brushless dc motor replace a compact servo motor?

Yes, especially in direct-drive or low-backlash systems.


Q3: Is liquid cooling required?

Optional, depending on load and duty cycle.


Q4: Can torque and speed be customized?

Yes, via winding and electrical configuration.


Q5: Is 42mm slotless brushless dc motor suitable for continuous operation?

Yes, 42mm slotless brushless dc motor supports long-term industrial use.


Q6: Do you support OEM and ODM projects?

Yes, with full technical and production support.


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