6mm Slotless Brushless Motor | Ultra Mini BLDC Motor

6mm Slotless Brushless DC Motor – Product Overview

The 6mm slotless brushless motor is an ultra-miniature BLDC motor designed for applications where extreme compactness, smooth rotation, and precise control are required.

By adopting a slotless winding structure, 6mm slotless brushless motor eliminates cogging torque, enabling exceptionally smooth motion even at very low speeds.

6mm slotless brushless motor is typically used in high-precision and space-constrained systems, especially in medical and micro-instrument applications where vibration and noise must be minimized.

coreless gear motor

Key Features

Ultra-mini 6mm outer diameter
Slotless winding for zero cogging torque
Extremely low rotor inertia
Smooth and stable operation at low speeds
Designed for OEM and precision device integration

Typical Applications of 6mm Slotless Brushless DC Motor

The 6mm slotless brushless motor is primarily used in micro-scale systems where precision and smooth motion are critical.

In medical devices, 6mm slotless brushless motor is often integrated into minimally invasive tools and micro actuators, where stable rotation and low vibration are essential for accuracy and patient safety.

In precision instruments, 6mm slotless brushless motor supports controlled micro-motion for sensing and positioning applications.

Typical applications include:

Minimally invasive medical instruments
Micro medical pumps and actuators
Precision laboratory equipment
Optical and sensing devices
Micro robotic mechanisms

Technical Specifications of 6mm Slotless Brushless DC Motor

The following technical data applies to the 6mm slotless brushless DC motor.

Electrical Parameters

Rated voltage options: 6V etc.
Rated speed: 32000rpm(customized)
Rated Torque: 0.3mN.m(customized)
Output power range: 1W(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

6ZWWC20

Pole pairs

-

1

Terminal resistance, Phase-Phase

Ω

5.9

Terminal inductance, Phase-Phase

mH

0.04

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

3

Rated voltage

V

6

Rated power

W

1

Rated torque

mN·m

0.3

Rated speed

RPM

32000

Rated current

A

0.46

No load speed

RPM

48500

No load current

A

0.09

Motor efficiency

%

37

Noise
(Ambient noise 20dB, test distance 1m)

dB

<50

Thermal Resistance (No-load)

K/W

39.9

Ambient temperature

℃

22.3

Max winding temperature

℃

63

Torque constant

mN·m/A

0.65

Back-EMF constant - peak value

V/Krpm

0.1

Back-EMF constant - effective value

V/Krpm

0.07

Peak torque

mN·m

0.66

Peak current

A

1

Rotor inertia

g·cm²

0.005

Mechanical time constant

ms

6.92

End bell

-

Stainless steel

Bearing

-

Deep groove ball bearing

Magnet

-

Sinter NdFeB

Rotation shaft

-

Carbon steel

Dimension Drawing of 6mm slotless brushless motor 6ZWWC20

Performance Curve of 6mm slotless brushless motor 6ZWWC20

6mm slotless brushless dc motor performance curve

FAQ –6mm Slotless Brushless DC Motor

Q1: What is the main advantage of a 6mm slotless brushless motor?

Smooth rotation without cogging torque in extremely limited space.

Q2: Is 6mm slotless brushless motor suitable for medical devices?

Yes, 6mm slotless brushless motor is widely used in compact medical and surgical instruments.

Q3: Can 6mm slotless brushless motor run at very low speeds smoothly?

Yes, the slotless structure allows stable low-speed operation.

Q4: Is customization supported?

Yes, winding, voltage, and shaft options can be customized.

Q5: Does 6mm slotless brushless motor require a specific controller?

6mm slotless brushless motor works with standard micro BLDC controllers.

Q6: Do you support OEM projects?

Yes, 6mm slotless brushless motor is designed specifically for OEM integration.

6mm Slotless Brushless Motor – Ultra-Mini Precision BLDC Motor