CHIHAI CHF-GM12-N20 ABHL DC Gear Motor with 3 PPR Hall Encoder
CHIHAI CHF-GM12-N20 ABHL DC Gear Motor with 3 PPR Hall Encoder
CHIHAI MOTOR
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Overview
The CHIHAI MOTOR CHF-GM12-N20 ABHL is a compact DC gear motor with an AB incremental Hall encoder and 3 PPR motor-shaft base resolution. Choose the voltage and A06/A12 winding, reduction ratio, and motor-only or mounting-bracket package for compact robot mechanisms requiring speed or position feedback.
Features
- Metal reduction gears and copper armature winding.
- 3 mm D-shaped output shaft for secure coupling.
- Two-channel Hall feedback with onboard pull-up shaping resistors.
- Six-wire connection separates motor power from encoder supply and signals.
- Optional white mounting bracket; matching connection cable included.
- 1000:1 option uses an extended gearbox.
Specifications
| Specification | Value / scope |
|---|---|
| Brand / model | CHIHAI MOTOR / CHF-GM12-N20 ABHL |
| Construction | Metal reduction gears; copper armature winding; AB magnetic Hall encoder |
| Motor configurations | 3V A06, 6V A06, 6V A12, 12V A12 |
| Nominal reduction ratios | 10, 20, 30, 50, 100, 150, 210, 298, 380 and 1000:1 |
| 1000:1 version | Extended gearbox; standard drawing and performance tables do not specify its length or operating points |
| Standard shaft | 3 mm diameter, +0/-0.03 mm; 2.5 mm D-flat, +0/-0.1 mm |
| Shaft projection | 10.0 +/-0.3 mm |
| Standard drawing | 12.5 x 12 mm front envelope; 9 mm gearbox reference; maximum 29.5 mm body reference; 20.5 mm motor-section reference |
| Mounting references | 2-M1.4 and 2-M1.6 hole callouts; 10 mm and 9 mm hole-pattern references; 4 mm front register |
| Cable | ZH1.5-6PIN; 100 +/-5 mm cable reference |
| Motor mass | Approximately 13 g; varies with gearbox ratio, excludes packaging |
| Encoder supply | 3.3V or 5V DC, separate from motor supply |
| Encoder output | A/B square waves; onboard pull-up shaping resistors |
| Encoder base resolution | 3 PPR per motor-shaft revolution |
| Magnetic ring | 6 poles / 3 pole pairs |
| Response frequency | 100 kHz |
| Output pulses | 3 PPR x actual gearbox ratio; counting convention must be considered |
Wiring and Encoder Feedback
Orient the connector using the dimensional drawing and board labels before connecting power. Motor M1/M2 must match the selected winding voltage. Encoder VCC uses a separate 3.3V or 5V supply; do not apply 12V to encoder VCC. Connect A/B outputs to compatible counting inputs and verify input voltage and grounding requirements.
| Connector pin | Function | Wire color |
|---|---|---|
| 1 / M1 | Motor + | Red |
| 2 / GND | Encoder ground | Black |
| 3 / C1 | Hall channel A | Yellow |
| 4 / C2 | Hall channel B | White |
| 5 / VCC | Encoder supply, 3.3V or 5V | Blue |
| 6 / M2 | Motor - | Green |
Base resolution is 3 PPR at the motor shaft. Output pulses depend on actual mechanical reduction; nominal ratio names are rounded. Decoder counts depend on the chosen edge-counting method. A motor driver and feedback controller are required separately for closed-loop operation.
Electrical Performance
Values below apply only to the named voltage/winding and nominal ratios 10-380. No-load, rated and stall conditions are distinct. Do not operate continuously at stall. The extended 1000:1 configuration has no operating-point table here.
12V A12
Maximum power reference: 0.9 W.
| Ratio | No-load mA | No-load rpm | Rated kgf cm | Rated mN m | Rated rpm | Rated A | Stall A | Stall kgf cm |
|---|---|---|---|---|---|---|---|---|
| 10:1 | <=60 | 2200 | 0.1 | 9.8 | 1000 | <=0.22 | 0.4 | 0.15 |
| 20:1 | <=60 | 1100 | 0.15 | 14.7 | 500 | <=0.22 | 0.4 | 0.28 |
| 30:1 | <=60 | 730 | 0.2 | 19.6 | 380 | <=0.22 | 0.4 | 0.4 |
| 50:1 | <=60 | 440 | 0.4 | 39.2 | 230 | <=0.22 | 0.4 | 0.65 |
| 100:1 | <=60 | 220 | 0.8 | 78.4 | 130 | <=0.22 | 0.4 | 1.3 |
| 150:1 | <=60 | 145 | 1.2 | 117.6 | 85 | <=0.22 | 0.4 | 1.9 |
| 210:1 | <=60 | 105 | 1.6 | 156.9 | 60 | <=0.22 | 0.4 | 2.5 |
| 298:1 | <=60 | 73 | 2.3 | 225.5 | 42 | <=0.22 | 0.4 | 3 |
| 380:1 | <=60 | 58 | 3.0 | 294.1 | 34 | <=0.22 | 0.4 | 4 |
6V A12
Maximum power reference: 0.2 W.
| Ratio | No-load mA | No-load rpm | Rated kgf cm | Rated mN m | Rated rpm | Rated A | Stall A | Stall kgf cm |
|---|---|---|---|---|---|---|---|---|
| 10:1 | <=45 | 1000 | 0.05 | 4.9 | 700 | <=0.1 | 0.2 | 0.07 |
| 20:1 | <=45 | 500 | 0.09 | 8.8 | 350 | <=0.1 | 0.2 | 0.12 |
| 30:1 | <=45 | 330 | 0.12 | See kgf cm | 200 | <=0.1 | 0.2 | 0.2 |
| 50:1 | <=45 | 200 | 0.2 | 19.6 | 120 | <=0.1 | 0.2 | 0.32 |
| 100:1 | <=45 | 100 | 0.4 | 39.2 | 65 | <=0.1 | 0.2 | 0.7 |
| 150:1 | <=45 | 65 | 0.6 | 58.8 | 45 | <=0.1 | 0.2 | 0.9 |
| 210:1 | <=45 | 47 | 0.8 | 78.45 | 30 | <=0.1 | 0.2 | 1.2 |
| 298:1 | <=45 | 33 | 1.15 | 112.75 | 20 | <=0.1 | 0.2 | 1.5 |
| 380:1 | <=45 | 26 | 1.5 | 147 | 17 | <=0.1 | 0.2 | 2 |
6V A06
Maximum power reference: 0.45 W.
| Ratio | No-load mA | No-load rpm | Rated kgf cm | Rated mN m | Rated rpm | Rated A | Stall A | Stall kgf cm |
|---|---|---|---|---|---|---|---|---|
| 10:1 | <=60 | 1550 | 0.07 | 6.8 | 900 | <=0.17 | 0.6 | 0.16 |
| 20:1 | <=60 | 800 | 0.14 | 13.7 | 460 | <=0.17 | 0.6 | 0.3 |
| 30:1 | <=60 | 530 | 0.2 | 19.6 | 300 | <=0.17 | 0.6 | 0.5 |
| 50:1 | <=60 | 310 | 0.35 | 34.3 | 180 | <=0.17 | 0.6 | 0.8 |
| 100:1 | <=60 | 155 | 0.7 | 68.6 | 90 | <=0.17 | 0.6 | 1.5 |
| 150:1 | <=60 | 105 | 1 | 98 | 60 | <=0.17 | 0.6 | 2.2 |
| 210:1 | <=60 | 75 | 1.4 | 137.25 | 42 | <=0.17 | 0.6 | 2.8 |
| 298:1 | <=60 | 52 | 2 | 196.08 | 30 | <=0.17 | 0.6 | 3 |
| 380:1 | <=60 | 41 | 2.5 | 245.1 | 24 | <=0.17 | 0.6 | 4 |
3V A06
Maximum power reference: 0.1 W.
| Ratio | No-load mA | No-load rpm | Rated kgf cm | Rated mN m | Rated rpm | Rated A | Stall A | Stall kgf cm |
|---|---|---|---|---|---|---|---|---|
| 10:1 | <=45 | 780 | 0.03 | 2.94 | 450 | <=0.10 | 0.3 | 0.08 |
| 20:1 | <=45 | 400 | 0.06 | 5.88 | 230 | <=0.10 | 0.3 | 0.16 |
| 30:1 | <=45 | 265 | 0.1 | 9.8 | 150 | <=0.10 | 0.3 | 0.23 |
| 50:1 | <=45 | 155 | 0.17 | 16.67 | 90 | <=0.10 | 0.3 | 0.4 |
| 100:1 | <=45 | 77 | 0.35 | 34.4 | 45 | <=0.10 | 0.3 | 0.75 |
| 150:1 | <=45 | 52 | 0.5 | 49.02 | 30 | <=0.10 | 0.3 | 1.1 |
| 210:1 | <=45 | 37 | 0.7 | 68.63 | 21 | <=0.10 | 0.3 | 1.5 |
| 298:1 | <=45 | 26 | 1 | 98.04 | 15 | <=0.10 | 0.3 | 2.8 |
| 380:1 | <=45 | 20 | 1.2 | 117.6 | 12 | <=0.10 | 0.3 | 3.5 |
12V A12 Output-Pulse References
| Nominal ratio | Output pulses / revolution |
|---|---|
| 10:1 | 29.04 |
| 20:1 | Not specified |
| 30:1 | 88.41 |
| 50:1 | 153.3 |
| 100:1 | 297.9 |
| 150:1 | 452.87 |
| 210:1 | 629.27 |
| 298:1 | 893.7 |
| 380:1 | 1137.47 |
The nominal 20:1 entry has no confirmed exact output pulse value here; determine the actual ratio or calibrate counting for precision positioning. Pulse values are not automatically quadrature decoder counts.
Installation and Use
Check shaft fit, hole pattern and cable clearance before machining a mount. The standard drawing does not establish the dimensions of the extended 1000:1 gearbox. Avoid forcing the output shaft, overload and sustained stall. Start at the correct motor voltage and verify rotation direction and feedback before connecting a load. Motor vibration, noise and temperature can change with speed, torque and load.
Applications
- Small robot and inspection-cart drive mechanisms requiring speed feedback.
- Balancing-vehicle development with suitable external control electronics.
- Compact home-robot and camera-positioning mechanisms requiring position feedback.
What's Included
- Motor Only: one selected encoder gear motor and matching six-wire cable.
- Motor + Mounting Bracket: one selected encoder gear motor, matching cable and one white mounting bracket.
Power supply, motor driver, encoder counter, controller and application hardware are not included.
FAQ
Is this the 7 PPR GM12N20 version?
No. This CHF-GM12-N20 ABHL version has a 3 PPR motor-shaft base resolution and a six-pole magnetic ring.
Can the encoder be powered from a 12V motor supply?
No. Encoder VCC requires 3.3V or 5V DC; the motor terminals use the selected winding voltage.
Does 3 PPR mean three pulses per gearbox revolution?
No. It is the motor-shaft resolution. Output-shaft pulses depend on the actual gearbox ratio and counting method.
Does the standard drawing cover 1000:1?
No. The 1000:1 option has an extended gearbox. Confirm its mounting envelope separately.
Visual Details
