FA-3570RC Coreless Brushed DC Motor
FA-3570RC is a 70W industrial coreless brushed DC motor with Φ35mm outer diameter and 70mm body length. It adopts wear-resistant graphite carbon brushes, 13-segment commutator and heavy-duty ball bearings for long-cycle stable heavy-load operation. Four voltage grades (12V/15V/24V/30V) are available, with optional matched gearbox and encoder for closed-loop precision drive systems.
• Dimension: Φ35mm × Length 70mm
• Rated Power: 70W
• Voltage Options: 12.0V / 15.0V / 24.0V / 30.0V
• Graphite carbon brush + heavy-duty ball bearings
• Optional customized gearbox & multi-channel encoder
Mechanical Dimensions
Dimensions are in mm. Please refer to the datasheet for tolerances and mounting details.
Performance Parameters
| Motor specifications | 50A | 12A | 25A | 42A | |
|---|---|---|---|---|---|
| Nominal voltage | V | 12.0 | 15.0 | 24.0 | 30.0 |
| No load speed | rpm | 4600 | 7700 | 7570 | 7800 |
| No load current | mA | 180 | 190 | 210 | 120 |
| Nominal speed | rpm | 3450 | 5775 | 5677 | 5850 |
| Nominal torque | mNm | 177.95 | 258.4 | 313.2 | 327.95 |
| Nominal current | A | 7.82 | 14.03 | 10.5 | 9.02 |
| Stall torque | mNm | 711.8 | 1033 | 1252 | 1298 |
| Stall current | A | 28.57 | 55.56 | 41.38 | 35.71 |
| Terminal resistance | Ω | 0.42 | 0.27 | 0.58 | 0.84 |
| Torque constant | mNm/A | 24.4 | 18.2 | 29.7 | 36 |
| Speed constant | rpm/V | 383 | 513 | 315 | 260 |
| Mechanical time constant | ms | 5.5 | 6.4 | 5.2 | 5.1 |
| Rotor inertia | gcm² | 84.87 | 85.36 | 85.9 | 86.2 |
Optical Gearbox
| N/A | |
|---|---|
Optional encoder
| N/A | |
|---|---|
Other Specifications
| Other specifications | |||
|---|---|---|---|
| Operating temperature range | -20…+80℃ | Bearing type | Ball bearings |
| Number of pole pairs | 1 | Brush type | Graphite brushes |
| Number of phases | 13 | Weight of motor | 318.92g |
Engineering Overview
FA-3570RC adopts graphite brushes and 13-piece commutator to reduce abrasion under high current and extend service life. Large rotor inertia delivers stable output under variable heavy loads, with four voltage options covering 12V to special 30V industrial grade. Ultra-short mechanical time constant ensures fast acceleration & deceleration, and matched gearbox & encoder support heavy-load closed-loop precision control.
Typical Applications:
• Humanoid robot joint actuators
• Industrial heavy transmission machinery
• Large-flow high-pressure micro pumps
• 30V special industrial portable equipment
• High-power precision laboratory drives