CHIHAI CHR-GM37-3429 AB Hall Encoder DC Gear Motor, 6V/12V/24V
CHIHAI CHR-GM37-3429 AB Hall Encoder DC Gear Motor, 6V/12V/24V
CHIHAI MOTOR
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Overview
The CHIHAI MOTOR CHR-GM37-3429ABHL is a compact brushed DC gear motor with an all-metal reduction gearbox and a two-channel magnetic Hall encoder. Its6mm D shaft and optional bracket/wheel packages make it suitable for mobile-robot drive and small motion mechanisms. Select the motor voltage, nominal reduction ratio and package independently.
Choose Your Configuration
Choose6V,12V or24V and nominal6:1,10:1,18:1,30:1,50:1,90:1,150:1,270:1,450:1 or630:1. The nominal6:1 and18:1 options correspond to6.3:1 and18.8:1 performance references. The630:1 option has no matching performance row here; confirm its operating data before sizing a mechanism.
- Encoder Motor Only: one motor with encoder and connection lead.
- Encoder Motor + Bracket: one motor, lead and mounting bracket.
- 65mm Wheel Kit: one motor, bracket, hexagonal coupler, one65mm wheel and illustrated fixing hardware.
- 80mm Wheel Kit: one motor, bracket, hexagonal coupler, one80mm wheel and illustrated fixing hardware.
Wheel colors and tread styles may vary within the selected diameter. Pictures show alternative wheel styles; each kit contains one wheel. Select two motor kits for a two-wheel drive arrangement. A robot chassis, motor controller, microcontroller and power supply are not included.
Mechanical Specifications
| Parameter | Reference |
|---|---|
| Gearbox diameter | 37mm |
| Motor can | 34mm diameter,29.4mm section length |
| Output shaft | 6mm D shaft (+0/−0.03mm);21±0.5mm projection,12mm flat length,5.4mm across flat (+0/−0.1mm) |
| Front locating boss | 12mm diameter |
| Mounting | 6×M3 tapped holes,3mm deep,on31mm pitch circle; verify orientation before machining |
| Rear encoder | PH2.0-6PIN connector; protective-cover reference15mm rear section,32mm cover diameter. Uncovered encoder reference8.5mm rear section. |
| Net motor mass | Approximately180–200g, varying with ratio and configuration |
Package photographs show the protected encoder version. Uncovered encoder images illustrate the connector and construction, rather than an additional selectable package.
| Actual ratio reference | Gearbox L mm (±0.3) | Encoder pulses per output turn, per channel, approximate |
|---|---|---|
| 6.3:1 | 19 | 69 |
| 10:1 | 19 | 110 |
| 18.8:1 | 21.5 | 207 |
| 30:1 | 21.5 | 330 |
| 50:1 | 24 | 550 |
| 90:1 | 24 | 990 |
| 150:1 | 26.5 | 1650 |
| 270:1 | 26.5 | 2970 |
| 450:1 | 29 | 4950 |
Exact gearbox length and encoder count for630:1 are not specified here. Encoder pulse counts depend on the actual reduction ratio and decoding method.
Voltage-Specific Performance
24V Motor
Maximum output-power reference 11W; no-load current ≤150mA; stall-current reference ≤4.5A.
| Actual ratio | No-load rpm | Rated rpm | Rated kgf·cm | Rated N·m | Rated current A | Stall torque / limit kgf·cm |
|---|---|---|---|---|---|---|
| 6.3:1 | 1550 | 950 | 1 | 0.1 | ≤1.8 | ≥2.5 |
| 10:1 | 1000 | 600 | 1.6 | 0.16 | ≤1.8 | ≥4.0 |
| 18.8:1 | 530 | 320 | 3 | 0.3 | ≤1.8 | ≥7.5 |
| 30:1 | 330 | 200 | 4.8 | 0.48 | ≤1.8 | ≥12 |
| 50:1 | 200 | 120 | 8 | 0.8 | ≤1.8 | ≥20 |
| 90:1 | 110 | 65 | 14 | 1.4 | ≤1.8 | 30 max |
| 150:1 | 65 | 40 | 24 | 2.4 | ≤1.8 | 30 max |
| 270:1 | 36 | 27 | 30 | 3 | ≤1.8 | 30 max |
| 450:1 | 22 | 16 | 30 | 3 | ≤1.8 | 30 max |
12V Motor
Maximum output-power reference 11W; no-load current ≤300mA; stall-current reference ≤7.0A.
| Actual ratio | No-load rpm | Rated rpm | Rated kgf·cm | Rated N·m | Rated current A | Stall torque / limit kgf·cm |
|---|---|---|---|---|---|---|
| 6.3:1 | 1550 | 950 | 1 | 0.1 | ≤2.3 | ≥2.5 |
| 10:1 | 1000 | 600 | 1.6 | 0.16 | ≤2.3 | ≥4.0 |
| 18.8:1 | 530 | 320 | 3 | 0.3 | ≤2.3 | ≥7.5 |
| 30:1 | 330 | 200 | 4.8 | 0.48 | ≤2.3 | ≥12 |
| 50:1 | 200 | 120 | 8 | 0.8 | ≤2.3 | ≥20 |
| 90:1 | 110 | 65 | 14 | 1.4 | ≤2.3 | 30 max |
| 150:1 | 65 | 40 | 24 | 2.4 | ≤2.1 | 30 max |
| 270:1 | 36 | 27 | 30 | 3 | ≤1.9 | 30 max |
| 450:1 | 22 | 16 | 30 | 3 | ≤1.7 | 30 max |
6V Motor
Maximum output-power reference 2.6W; no-load current ≤200mA; stall-current reference ≤3.5A.
| Actual ratio | No-load rpm | Rated rpm | Rated kgf·cm | Rated N·m | Rated current A | Stall torque / limit kgf·cm |
|---|---|---|---|---|---|---|
| 6.3:1 | 775 | 470 | 0.5 | 0.05 | ≤1.4 | ≥1.2 |
| 10:1 | 500 | 300 | 0.8 | 0.08 | ≤1.4 | ≥2.0 |
| 18.8:1 | 265 | 160 | 1.5 | 0.15 | ≤1.4 | ≥3.7 |
| 30:1 | 165 | 100 | 2.4 | 0.24 | ≤1.4 | ≥6.0 |
| 50:1 | 100 | 60 | 4 | 0.4 | ≤1.4 | ≥10 |
| 90:1 | 55 | 32 | 7 | 0.7 | ≤1.4 | ≥18 |
| 150:1 | 32 | 20 | 12 | 1.2 | ≤1.4 | 30 max |
| 270:1 | 18 | 11 | 21 | 2.1 | ≤1.4 | 30 max |
| 450:1 | 11 | 6.5 | 30 | 3 | ≤1.4 | 30 max |
Rated torque, stall torque and maximum allowable gearbox load are different limits. “30 max” marks the maximum allowable load of30kgf·cm (approximately3.0N·m), not a guaranteed minimum stall torque. Avoid stalled operation and do not use stall current as a normal operating target. Maximum output-power figures are references rather than continuous-duty ratings. Select the actual motor voltage and allow for load, startup current and duty cycle.
Hall Encoder and Wiring
The encoder is an AB two-channel incremental magnetic Hall type with a base11PPR signal before reduction. Its magnetic ring has22 poles (11 pole pairs). The two square-wave channels allow direction sensing with suitable electronics. Built-in pull-up/shaping resistors support connection to an appropriate microcontroller input; logic compatibility still needs to match the chosen encoder supply.
| Illustrated lead | Function |
|---|---|
| White / M2 | Motor power terminal M2 |
| Blue / VCC | Encoder supply +3.3V or+5V |
| Green / C2 | Encoder channel B |
| Yellow / C1 | Encoder channel A |
| Black / GND | Encoder supply ground |
| Red / M1 | Motor power terminal M1 |
Connector reference:PH2.0,6pins. Encoder response-frequency reference:100kHz. The basic11PPR is per motor revolution; pulses per gearbox-output revolution equal the basic pulse count times the actual reduction ratio. Quadrature counting totals depend on which signal edges the controller decodes.
Motor power and encoder power are separate. Use the selected6V/12V/24V motor supply only on M1/M2. Supply the encoder with3.3V or5V, and keep motor voltage away from VCC, GND, C1 and C2. Verify connector orientation before connection and disconnect power before rewiring. A suitable bidirectional motor driver can reverse the motor power polarity; stop before changing direction. The encoder provides feedback and does not regulate speed or position by itself.
Applications
Use encoder feedback to measure wheel speed and direction in self-balancing vehicles, small mobile robots, smart mechanisms and inspection projects. A complete closed-loop or balancing system also requires an appropriate motor driver, sensors and control software. Avoid overload, rapid repeated reversals and forcing the gearbox shaft.
What's Included
One motor in the chosen voltage and reduction ratio, with Hall encoder and connection lead. Bracket, coupler, fixing hardware and one wheel are included only as specified by the selected package. Other pictured equipment is not included.
Visual Details
