FA-2050RB Coreless Brushless DC Motor
The FA-2050RB is a heavy-duty 18W high-torque coreless brushless DC motor with 20mm outer diameter and 50mm ultra-long body. It adopts durable ball bearings for long-hour heavy-load continuous operation. This model supplies three 24V and one 36V industrial high-voltage winding variants with distinct speed-torque curves. It comes with simple 3-wire winding terminals, and supports matched planetary gearbox and encoder for high-power closed-loop precision drive systems.
• Dimension: Φ20mm × Length 50mm
• Rated Power: 18W
• Voltage Options: 24V(19C/12C/18C) / 36V(09C)
• Heavy-duty ball bearings + 3-phase coreless structure
• Simple 3 independent winding wires; Optional gearbox & encoder
Mechanical Dimensions
Dimensions are in mm. Please refer to the datasheet for tolerances and mounting details.
Performance Parameters
| Motor specifications | 19C | 12C | 18C | 09C | |
|---|---|---|---|---|---|
| Nominal voltage | V | 24 | 24 | 24 | 36 |
| No load speed | rpm | 20500 | 38500 | 30000 | 42500 |
| No load current | mA | 70 | 140 | 100 | 100 |
| Nominal speed | rpm | 17800 | 33400 | 26100 | 36900 |
| Nominal torque | mNm | 9.53 | 14.4 | 14.02 | 15.45 |
| Nominal current | A | 0.91 | 5.54 | 1.92 | 2 |
| Stall torque | mNm | 73.3 | 110.8 | 107.9 | 118.9 |
| Stall current | A | 6.56 | 18.6 | 14.12 | 14.69 |
| Terminal resistance | Ω | 3.66 | 1.29 | 1.7 | 2.45 |
| Torque constant | mNm/A | 10.95 | 5.83 | 7.48 | 7.92 |
| Speed constant | rpm/V | 854 | 1604 | 1250 | 1180 |
| Mechanical time constant | ms | 2.39 | 2.98 | 2.38 | 3.06 |
| Rotor inertia | gcm² | 0.86 | 0.86 | 0.86 | 0.86 |
Optical Gearbox
| N/A | |
|---|---|
Optional encoder
| N/A | |
|---|---|
Terminal data
| Terminal data | ||
|---|---|---|
| Teminal model | ||
| Pin 1 电机绕组 Motor winding 1 | Pin 2 电机绕组 Motor winding 2 | Pin 3 电机绕组 Motor winding 3 |
Other Specifications
| Other specifications | |||
|---|---|---|---|
| Operating temperature range | -20…+80℃ | Bearing type | Ball bearings |
| Number of pole pairs | 1 | Weight of motor | 66g |
| Number of phases | 3 |
Engineering Overview
FA-2050RB ultra-long high-power coreless brushless DC motor eliminates iron core cogging torque and brush abrasion, delivering ultra-smooth rotation, low electromagnetic interference and extremely long service life. Ball bearing design supports continuous heavy-load operation without overheating. Low rotor inertia and short mechanical time enable ultra-fast dynamic response under frequent start-stop conditions. It adopts industrial 24V and 36V high-voltage specifications, matching industrial power supply standards. Massive stall torque makes it ideal for heavy-load micro actuators, while matched gearbox and encoder realize high-precision closed-loop torque and speed control.
Typical Applications:
• Medium & heavy-load micro robot joint actuators
• High-end industrial miniature transmission modules
• Precision dental & surgical handheld instruments
• High-power portable carving & grinding equipment