FA-3247RD Two-Pole Coreless Brushless DC Motor
FA-3247RD is a reliable 45W two-pole coreless brushless DC motor with 32mm outer diameter and 47mm housing length. It adopts reinforced double precision ball bearings to absorb vibration during prolonged handheld operation. The two‑pole slotless rotor features low inertia for fast dynamic response and zero cogging torque. A built‑in 3‑channel hall sensor delivers steady closed‑loop speed regulation. Four winding options cover widely adopted 12V, 24V, 36V and 48V industrial power supplies. Custom planetary gearboxes and EM22 encoders can be fitted to build low‑speed high‑torque precision drive assemblies.
• Dimension: Φ32mm × Length 47mm
• Max Transmission Power: 45W
• Voltage Options: 12V(02A) / 24V(01A) / 36V(03A) / 48V(04A)
• Two‑pole magnetic structure + dual ball bearings + integrated 3CH hall sensor
• Standard multi‑color split wiring; Optional planetary gearbox & EM22 series encoders
Mechanical Dimensions
Dimensions are in mm. Please refer to the datasheet for tolerances and mounting details.
Performance Parameters
| Motor specifications | 02A | 01A | 03A | 04A | |
|---|---|---|---|---|---|
| Nominal voltage | V | 12 | 24 | 36 | 48 |
| No load speed | rpm | 10800 | 10800 | 10800 | 10800 |
| No load current | mA | 260 | 200 | 180 | 150 |
| Nominal speed | rpm | 9720 | 9720 | 9720 | 9720 |
| Nominal torque | mNm | 44.68 | 43.91 | 45.3 | 43.91 |
| Nominal current | A | 4.44 | 2.25 | 1.6 | 1.17 |
| Stall torque | mNm | 446.8 | 439.1 | 453 | 439.1 |
| Stall current | A | 42.11 | 20.69 | 14.23 | 10.34 |
| Terminal resistance | Ω | 0.285 | 1.16 | 2.53 | 4.64 |
| Torque constant | mNm/A | 10.6 | 21.2 | 31.8 | 42.4 |
| Speed constant | rpm/V | 900 | 450 | 300 | 225 |
| Mechanical time constant | ms | 5.71 | 5.81 | 5.64 | 5.81 |
| Rotor inertia | gcm² | 23.64 | 23.64 | 23.64 | 23.64 |
Optical Gearbox
| N/A | |
|---|---|
Optional encoder
| N/A | |
|---|---|
Terminal data
| Terminal data | |
|---|---|
| Teminal model : |
Other Specifications
| Other specifications | |||
|---|---|---|---|
| Operating temperature range | -20…+80℃ | Bearing type | Ball bearings |
| Number of pole pairs | 2 | Weight of motor | |
| Number of phases | 3 |
Engineering Overview
FA-3247RD two‑pole coreless BLDC eliminates cogging torque to deliver smooth, low‑noise rotary performance. Heavy‑duty ball bearings deliver superior vibration tolerance and extended service life compared to sleeve bearing variants, suited for frequent dynamic load swings. Consistent rated speed across all voltage grades streamlines drive program development for multi‑voltage product lines. The broad voltage portfolio fits lithium cordless carving gear, salon beauty polishing equipment and low‑power industrial automated mechanisms. A matched gearbox amplifies torque for grinding and light cutting jobs; encoders enable high‑precision closed‑loop position feedback.
Typical Applications:
• Medium‑size cordless jade / metal engraving and grinding handheld power tools
• Salon‑grade high‑power nail drills and professional beauty polishing devices
• Benchtop miniature deburring machines and automated material processing modules
• Light‑load joint actuators for small desktop robotic equipment