FA-2854RB Coreless Brushless DC Motor
FA-2854RB is a high-power 55W coreless brushless DC motor with 28mm outer diameter and 54mm ultra-long body. Equipped with heavy-duty double ball bearings and built-in 3-channel hall sensor, it delivers stable closed-loop speed regulation under heavy variable loads. This model provides four winding options covering mainstream 30V and 32V industrial lithium voltages, including high-speed and ultra-high stall torque versions. Standard 8Pin JST PH2.0 black silicone harness; optional G28MT planetary gearbox and EM22 series encoders support closed-loop precision drive systems.
• Dimension: Φ28mm × Length 54mm
• Rated Power: 55W
• Voltage Options: 30V(14XA/17A/18A) / 32V(36A)
• Heavy-duty double ball bearings + integrated 3CH hall sensor
• 8Pin-26# black silicone wire, JST PH2.0 connector; Optional G28MT gearbox & EM22 encoders
Mechanical Dimensions
Dimensions are in mm. Please refer to the datasheet for tolerances and mounting details.
Performance Parameters
| Motor specifications | 14XA | 17A | 18A | 36A | |
|---|---|---|---|---|---|
| Nominal voltage | V | 30 | 30 | 30 | 32 |
| No load speed | rpm | 16500 | 9200 | 21500 | 16500 |
| No load current | mA | 120 | 120 | 220 | 160 |
| Nominal speed | rpm | 14900 | 8300 | 19400 | 14900 |
| Nominal torque | mNm | 49 | 21.75 | 48.07 | 41.71 |
| Nominal current | A | 2.93 | 0.78 | 3.81 | 2.39 |
| Stall torque | mNm | 515.8 | 229 | 506 | 439 |
| Stall current | A | 29.7 | 7.35 | 37.97 | 23.7 |
| Terminal resistance | Ω | 1.01 | 4.08 | 0.79 | 1.35 |
| Torque constant | mNm/A | 17.01 | 30.52 | 13.06 | 18.15 |
| Speed constant | rpm/V | 550 | 306 | 716 | 515 |
| Mechanical time constant | ms | 2.42 | 3.05 | 3.22 | 2.85 |
| Rotor inertia | gcm² | 7.58 | 7.58 | 7.58 | 7.58 |
Optical Gearbox
| Optional gearbox | |
|---|---|
| G28MT | |
Optional encoder
| Optional encoder | |
|---|---|
| EM22 | 增量式(Incremental) 1~1638ppr 1~3通道(channel) |
| EM22 | 绝对式(Absolute) 21 bit single turn |
Terminal data
| Terminal data | ||
|---|---|---|
| Teminal model :8Pin-26# | 3302 引线黑色+JST端子 PH2.0 | |
| Pin 1 电机绕组Motor winding 3 黑色Black | Pin 2 电机绕组Motor winding 1 黑色Black | Pin 3 电机绕组Motor winding 2 黑色Black |
| Pin 4 霍尔传感器Hall GND 黑色Black | Pin 5 霍尔传感器Hall sensor 1 黑色Black | Pin 6 霍尔传感器Hall sensor 2 黑色Back |
| Pin 7 霍尔传感器Hall sensor 3 黑色Black | Pin 8 霍尔传感器Hall Vcc 3.3~5V黑色Black |
Other Specifications
| Other specifications | |||
|---|---|---|---|
| Operating temperature range | -20…+80℃ | Bearing type | Ball bearings |
| Number of pole pairs | 1 | Weight of motor | 154.7g |
| Number of phases | 3 |
Engineering Overview
FA-2854RB coreless BLDC eliminates cogging torque and brush abrasion for ultra-smooth, low-noise continuous operation. Heavy-duty ball bearings offer outstanding shock and vibration resistance for long-hour heavy loads. Large rotor inertia delivers extremely high stall torque for high-demand working conditions. It supports 30V/32V lithium power supplies, compatible with both industrial automation and handheld equipment. Matched gearbox and high-resolution encoders realize accurate torque and position closed-loop control.
Typical Applications:
• Cordless engraving, grinding & polishing power tools
• Medium-heavy load miniature robot joint actuators
• High-end professional beauty & medical handheld instruments
• Small industrial heavy-duty automated transmission modules