FA-1218RD Two-Pole Coreless Brushless DC Motor
FA-1218RD is a compact 5W two-pole miniature coreless brushless DC motor with Φ12 outer diameter and 18mm body length. Adopts 2-pole magnetic design for ultra-fast dynamic response, equipped with sleeve oil bearings and built-in 3-channel hall sensor for stable closed-loop speed control. Three winding versions cover 7.4V lithium and 12V industrial voltages, balancing ultra-high speed and medium torque output. Two matching micro planetary gearboxes G12MF & G12XL and mini encoders are optional for tiny portable devices.
• Dimension: Φ12mm × Length 18mm
• Rated Power: 5W
• Voltage Options: 7.4V(01A) / 12V(02A/03A)
• Two-pole structure + sleeve oil bearings + 3CH hall sensor
• Standard 8Pin pin header; Optional G12MF/G12XL micro gearboxes & mini encoders
Mechanical Dimensions
Dimensions are in mm. Please refer to the datasheet for tolerances and mounting details.
Performance Parameters
| Motor specifications | 01A | 02A | 03A | |
|---|---|---|---|---|
| Nominal voltage | V | 7.4 | 12 | 12 |
| No load speed | rpm | 32250 | 31600 | 19200 |
| No load current | mA | 160 | 100 | 100 |
| Nominal speed | rpm | 29025 | 28440 | 17280 |
| Nominal torque | mNm | 1.69 | 1.79 | 1.2 |
| Nominal current | A | 0.91 | 0.58 | 0.29 |
| Stall torque | mNm | 16.9 | 17.9 | 12 |
| Stall current | A | 7.71 | 4.94 | 2.0 |
| Terminal resistance | Ω | 0.96 | 2.43 | 5.99 |
| Torque constant | mNm/A | 2.19 | 3.62 | 6.0 |
| Speed constant | rpm/V | 4358.1 | 2633.3 | 1600 |
| Mechanical time constant | ms | 3.54 | 3.32 | 3.02 |
| Rotor inertia | gcm² | 0.19 | 0.19 | 0.19 |
Optical Gearbox
| Optional gearbox | |
|---|---|
| G12MF | |
| G12XL |
Optional encoder
| N/A | |
|---|---|
Terminal data
| Terminal data | |||
|---|---|---|---|
| Teminal model : 8 Pin排针 | |||
| Pin 1 电机绕组 Motor winding 1 | Pin 2 霍尔传感器 Hall sensor 3 | Pin 3 霍尔传感器 Hall Vcc 3.3~5V | Pin 4 电机绕组 Motor winding 2 |
| Pin 5 霍尔传感器 Hall sensor 2 | Pin 6 霍尔传感器 Hall GND | Pin 7 电机绕组 Motor winding 3 | Pin 8 霍尔传感器 Hall sensor 1 |
Other Specifications
| Other specifications | |||
|---|---|---|---|
| Operating temperature range | -20…+80℃ | Bearing type | Sleeve bearings |
| Number of pole pairs | 2 | Weight of motor | 12g |
| Number of phases | 3 |
Engineering Overview
FA-1218RD two-pole coreless BLDC features ultra-low rotor inertia, ultra-high speed and rapid start-stop response. Two-pole slotless design eliminates cogging torque, achieving ultra-silent and smooth rotation. Only 12g lightweight slim body fits ultra-narrow mini equipment structures. Sleeve bearings ensure stable low-load long-term operation. Multiple voltage and speed versions match lithium beauty devices and low-voltage portable electronics. Matched G12MF/G12XL micro gearboxes reduce speed and boost torque for tiny precision drive modules.
Typical Applications:
• Mini nail polish polishers, facial massage beauty instruments
• Portable miniature medical sampling & testing equipment
• Tiny camera focusing gimbal, optical micro adjustment modules
• Small portable household personal care appliances