FA-2438RB Coreless Brushless DC Motor
The FA-2438RB is a large-diameter 20W coreless brushless DC motor with 24mm outer diameter and 38mm body length. It adopts double heavy-duty ball bearings and built-in 3-channel hall sensor for stable closed-loop speed & position control. This model supports four industrial winding variants covering 24V, dual 30V and 32V high voltage grades, equipped with standard JST PH2.0 8Pin black silicone wire harness integrating power windings and hall signal pins. Optional G22MF planetary gearbox and EM22 incremental/absolute encoders are available for heavy-duty miniature automation, power tool and medical drive systems.
• Dimension: Φ24mm × Length 38mm
• Rated Power: 20W
• Voltage Options: 24V(05A) / 30V(01A/03A) / 32V(04A)
• Heavy-duty double ball bearings + integrated 3-channel hall sensor (3.3~5V)
• JST PH2.0 8Pin 26AWG black silicone wire terminal; Matching gearbox & multi-type encoders
Mechanical Dimensions
Dimensions are in mm. Please refer to the datasheet for tolerances and mounting details.
Performance Parameters
| Motor specifications | 05A | 01A | 03A | 04A | |
|---|---|---|---|---|---|
| Nominal voltage | V | 24 | 30 | 30 | 32 |
| No load speed | rpm | 9000 | 19000 | 20500 | 17500 |
| No load current | mA | 100 | 90 | 110 | 90 |
| Nominal speed | rpm | 8100 | 17100 | 18500 | 15800 |
| Nominal torque | mNm | 6.49 | 14.33 | 16.39 | 13.04 |
| Nominal current | A | 0.35 | 1.03 | 1.27 | 0.83 |
| Stall torque | mNm | 68.4 | 150.8 | 172.5 | 137.3 |
| Stall current | A | 2.68 | 10 | 12.35 | 7.86 |
| Terminal resistance | Ω | 8.94 | 3 | 2.43 | 4.07 |
| Torque constant | mNm/A | 24.95 | 14.77 | 13.69 | 17.11 |
| Speed constant | rpm/V | 375 | 633 | 683 | 546 |
| Mechanical time constant | ms | 4.54 | 4.35 | 4.1 | 4.4 |
| Rotor inertia | gcm² | 3.45 | 3.45 | 3.45 | 3.45 |
Optical Gearbox
| Optional gearbox | |
|---|---|
| G22MF | |
Optional encoder
| Optional encoder | |
|---|---|
| EM22 | 增量式(Incremental) 1~1024ppr 1~3通道(channel) |
| EM22 | 绝对式(Absolute) 14 bit single turn |
Terminal data
| Terminal data | |||
|---|---|---|---|
| Terminal model：8Pin-26# | 3302 引线黑色+JST端子 PH2.0 | ||
| Pin 1 电机绕组 Motor winding 3 | Pin 2 电机绕组 Motor winding 1 | Pin 3 电机绕组 Motor winding 2 | Pin 4 霍尔传感器 Hall GND |
| Pin 5 霍尔传感器 Hall sensor 1 | Pin 6 霍尔传感器 Hall sensor 2 | Pin 7 霍尔传感器 Hall sensor 3 | Pin 8 霍尔传感器 Hall Vcc 3.3~5V |
Other Specifications
| Other specifications | |||
|---|---|---|---|
| Operating temperature range | -20…+80℃ | Bearing type | Ball bearings |
| Number of pole pairs | 1 | Weight of motor | 47g |
| Number of phases | 3 |
Engineering Overview
FA-2438RB large-diameter coreless brushless DC motor removes iron cogging torque and mechanical brush friction, delivering ultra-smooth low-vibration rotation, low electromagnetic interference and extended continuous service life. Double ball bearing structure greatly improves radial load resistance and shock resistance, stable under frequent start-stop and fluctuating load conditions. Larger rotor inertia provides stable torque output during high-speed cutting, grinding and polishing work. It covers mainstream industrial high voltage from 24V to 32V, matching lithium battery power tools and industrial automation power supply standards. Built-in hall sensors support real-time closed-loop speed regulation; matched planetary gearbox amplifies torque for low-speed heavy-load scenarios, while EM22 series encoders realize high-precision position control.
Typical Applications:
• Cordless portable engraving, grinding & polishing power tools
• High-precision handheld medical and beauty instruments
• Medium-load miniature robot joint actuators
• Small industrial automated transmission modules
• Laboratory precision testing micro drive equipment
Need multi-voltage winding or gearbox & encoder matching customization?
FA-2438RB 20W large-diameter coreless brushless DC motor provides 24V/30V/32V multiple performance variants with standard JST PH2.0 8Pin wiring. Our engineering team can optimize coil, shaft and wiring specifications based on your power tool or industrial equipment load demands.