DC motor 12ZWWC29

brushlessBLDC6 V

Product overview
12ZWWC29 is a 12 mm slotless brushless DC motor designed for precision motion applications requiring high speed, low inertia and compact size. Rated 6 V / 5 W with a peak torque of 19.76 mN·m, it is suitable for servo and micro-actuation systems. Dimensional drawings and torque–speed curves are provided to assist integration.

Motor characteristics
Motor part number: 12ZWWC29
Pole pairs: 2
Phase‑to‑phase resistance: 1 Ω
Phase‑to‑phase inductance: 0.033 mH
Winding connection: Star
Insulation class: B
Duty type: S2
Insulation strength: 660VAC / 1kHz / 1mA / 1s
Insulation resistance: 100 MΩ / 500 VDC
Weight: 16.5 g
Rated voltage: 6 V
Rated power: 5 W
Rated torque: 4 mN·m
Rated speed: 12,000 RPM
Rated current: 1.21 A
No‑load speed: 15,000 RPM
No‑load current: 0.16 A
Motor efficiency: 70%
Noise (ambient 20 dB, test distance 1 m): <50 dB
Thermal resistance: 12.49 K/W
Max winding temperature: 86 ℃
Torque constant: 3.29 mN·m/A
Back‑EMF constant (peak/effective): 0.49 / 0.34 V/Krpm
Peak torque: 19.76 mN·m
Peak current: 6 A
Rotor inertia: 0.3 g·cm²
Mechanical time constant: 2.76 ms
End bell: Aluminum alloy
Bearing: Deep groove ball bearing
Magnet: Sintered NdFeB
Shaft: Carbon steel

Dimensional drawing & torque performance
Detailed dimensional drawings and speed–torque curves for the 2 pole‑pair configuration are provided to support mechanical integration and motor selection. Images include motor outline, mounting interfaces and performance graphs.

Options
Available gearboxes: Precision planetary gearbox and Silent gearbox. Precision planetary gearbox performance per stage:
Stage: 1 / 2 / 3 / 4
Gear ratio (X:1): 4.3 / 18.4 / 79 / 337
Max. backlash (°): 1.2 / 1.5 / 1.8 / 2.1
Max. continuous output power (W): 2.0 / 1 / 0.5 / 0.25
Max. peak output power (W): 2.5 / 1.25 / 0.65 / 0.3
Max. continuous input speed (RPM): 16,000 (all stages)
Max. peak input speed (RPM): 20,000 (all stages)
Max. continuous torque (N·m): 0.08 / 0.11 / 0.14 / 0.17
Max. peak torque (N·m): 0.1 / 0.14 / 0.18 / 0.21
Max. efficiency (%): 90 / 80 / 75 / 65
Weight (g): 9 / 12 / 15 / 18
Gearbox length L (mm): 11.3 / 15.1 / 18.9 / 22.7

Technical specifications (summary)

• Motor part number: 12ZWWC29
• Commercial name: 12 mm slotless BLDC motor
• Rated voltage: 6 V
• Rated power: 5 W
• Rated torque: 4 mN·m
• Peak torque: 19.76 mN·m
• Rated speed: 12,000 RPM
• No‑load speed: 15,000 RPM
• Rated current: 1.21 A
• No‑load current: 0.16 A
• Torque constant: 3.29 mN·m/A
• Back‑EMF (peak/effective): 0.49 / 0.34 V/Krpm
• Phase resistance: 1 Ω
• Phase inductance: 0.033 mH
• Efficiency: 70%
• Weight: 16.5 g
• Bearing: Deep groove ball bearing
• End bell: Aluminum alloy
• Magnet: Sintered NdFeB
• Shaft material: Carbon steel
• Thermal resistance: 12.49 K/W
• Max winding temperature: 86 ℃