FA-1220R Coreless Brushed DC Motor

The FA-1220R is a compact 1.5W coreless brushed DC motor sized Φ12mm × 20.4mm, adopting iron-free coreless rotor and precious metal brush construction for ultra-smooth, low-vibration precision continuous operation.

• Dimension: Φ12mm × Length 20.4mm
• Rated Power: 1.5W
• Voltage Options:3.3V / 6.0V /7.4V /12.0V
• Precious metal brush + oil-impregnated sleeve bearing
• Optional G12MF & G12XL gearbox plus matching encoder

12×20.4mm 1.5W coreless brushed motor for precision medical & cosmetic handheld equipment

Mechanical Dimensions

FA-1220R Φ12×20.4mm coreless brushed DC motor mechanical outline drawing

Dimensions are in mm. Please refer to the datasheet for tolerances and mounting details.

Performance Parameters

Motor specifications 43A 40A 46A 41A
Nominal voltage  V 3.3 6.0 7.4 12.0
No load speed rpm 14700 25830 29000 25000
No load current mA 42 45 40 40
Nominal speed rpm 11061 23634 26535 22875
Nominal torque mNm 1.18 0.64 0.78 1.07
Nominal current A 0.58 0.33 0.35 0.27
Stall torque mNm 4.7 7.5 9.2 12.6
Stall current A 2.21 3.37 3.76 2.76
Terminal resistance Ω 1.49 1.78 1.97 4.35
Torque constant mNm/A 2.1 2.17 2.39 4.49
Speed constant rpm/V 4454 4305 3918 2083
Mechanical time constant ms 7.8 8.8 8.7 5.1
Rotor inertia gcm² 0.253 0.251 0.255 0.258

Optical Gearbox

Optional gearbox
G12MF
G12XL

Optional encoder

N/A

Other Specifications

Other specifications
Operating temperature range -20…+80℃ Bearing type Sleeve bearings
Number of pole pairs 1 Brush type Precious metal brushes
Number of phases 5 Weight of motor 9.69g

Engineering Overview

Designed with iron-free coreless rotor and 5-segment commutator matched with precious metal brushes, FA-1220R eliminates cogging torque to achieve quiet running, low inertia and rapid dynamic response. Two standard optional gearbox types (G12MF/G12XL) and encoders are available to boost output torque and implement closed-loop precision drive control for compact devices.

Typical Applications:
• Portable handheld precision medical diagnostic instruments
• Mini handheld beauty and cosmetic driving equipment
• Micro precision liquid & air transfer pumps
• Small compact laboratory testing analytical devices

Need customized voltage winding or gear ratio configuration?

FA-1220R is available in four standard voltage grades, our engineering team can pick proper G12MF/G12XL gearbox or customize coil parameters to satisfy your target torque, rotating speed and limited installation space demands.