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8mm Slotless Brushless Motor – Micro BLDC Motor for Precision 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.

  • 8ZWWC25

  • Modar Motor

  • 8mm

  • 3.25W

  • 0.8mN.m

  • 12V

  • 100% pure copper

  • 2

  • about 30 days

Availability:

8mm Slotless Brushless DC Motor – Product Overview


The 8mm slotless brushless motor provides an optimal balance between miniature size and usable torque output.
Using a slotless electromagnetic design, 8mm slotless brushless motor ensures smooth rotation and low acoustic noise, making it suitable for sensitive operating environments.


Compared with smaller motors, the 8mm platform offers improved thermal capacity while maintaining excellent motion smoothness.


全系列组合图1


Key Features

  • 8mm compact slotless BLDC motor

  • Cogging-free rotation

  • Improved torque vs ultra-mini motors

  • Low noise and low vibration

  • OEM-ready structure


Typical Applications of 8mm Slotless Brushless DC Motor


8mm slotless brushless motor is commonly used in applications requiring smooth and reliable micro-motion with slightly higher load capability.


In medical and laboratory devices, 8mm slotless brushless motor enables controlled movement while maintaining quiet and stable performance.

In optical and sensing equipment, 8mm slotless brushless motor supports fine positioning and continuous micro-rotation tasks.


Typical applications include:

  • Medical diagnostic instruments

  • Precision laboratory equipment

  • Optical positioning systems

  • Portable medical devices

  • Micro automation modules




Technical Specifications of 8mm Slotless Brushless DC Motor


The following technical data applies to the 8mm slotless brushless DC motor.

Electrical Parameters

  • Rated voltage options: 12V etc.

  • Rated speed: 38200rpm(customized)

  • Rated Torque: 0.8mN.m(customized)

  • Output power: 3.25W(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 8ZWWC25
Pole pairs -
Terminal resistance, Phase-Phase 6.1 
Terminal inductance, Phase-Phase mH 0.085 
Winding connection method - Delta connection
Insulation class - B
Duty type - S2
Insulation strength (Withstand voltage) - 300VAC/1KHz/1mA/1s
Insulation resistance - 100MΩ/300VDC
Weight g 7.3 
Rated voltage V 12 
Rated power W 3.25 
Rated torque mN·m 0.8 
Rated speed RPM 38200 
Rated current A 0.45 
No load speed RPM 48000 
No load current A 0.056 
Motor efficiency % 60 
Noise
(Ambient noise 20dB, test distance 1m)
dB <50
Thermal Resistance (No-load) K/W 12.52 
Ambient temperature 22.3 
Max winding temperature 63 
Torque constant mN·m/A 1.77 
Back-EMF constant - peak value V/Krpm 0.26 
Back-EMF constant - effective value V/Krpm 0.19 
Peak torque mN·m 3.49 
Peak current A
Rotor inertia g·cm² 0.016 
Mechanical time constant ms 3.11 
End bell - Stainless steel
Bearing - Deep groove ball bearing
Magnet - Sinter NdFeB
Rotation shaft - Carbon steel


Dimension Drawing of 8mm slotless brushless motor 8ZWWC25
8mm slotless brushless DC motor drawing
Performance Curve of 8mm slotless brushless motor 8ZWWC25
8mm slotless brushless DC motor performance curve



FAQ –8mm Slotless Brushless DC Motor


Q1: What differentiates the 8mm slotless brushless motor from the 6mm version?

8mm slotless brushless motor offers higher torque and better thermal capacity.


Q2: 8mm slotless brushless motor it still suitable for medical use?

Yes, 8mm slotless brushless motor is commonly used in medical and laboratory systems.


Q3: Is cogging torque present?

No, the slotless structure eliminates cogging.


Q4: Can 8mm slotless brushless motor be used for continuous operation?

Yes, under appropriate load conditions.


Q5: Are customization options available?

Yes, electrical and mechanical customization is supported.


Q6: Is long-term supply available?

Yes, for OEM and series production.


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