CHIHAI CHF-GM12-1215R Coreless DC Gear Motor, 3V 6V or 12V
CHIHAI CHF-GM12-1215R Coreless DC Gear Motor, 3V 6V or 12V
CHIHAI MOTOR
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Overview
The CHIHAI MOTOR CHF-GM12-1215R is a miniature coreless DC gear motor with a metal reduction gearbox and a3 mm D-shaped shaft. Choose a3V,6V or12V winding, a motor-only or PWM-controller package, and the available combination of reduction ratio and4.4 mm or10 mm shaft projection.
Features
- Permanent-magnet coreless motor with copper winding.
- Metal reduction gears in a compact12 mm gearbox.
- Reversible DC rotation and a D-flat output for secure coupling.
- Optional small PWM speed controller in the selected package.
Specifications
| Item | Specification |
|---|---|
| Model | CHF-GM12-1215R coreless brushed DC gear motor |
| Motor and gearbox | Permanent-magnet coreless motor, copper winding and metal reduction gears |
| Selected supply | 3V,6V or12V DC winding; match selected option |
| Body reference | 12 mm gearbox width;24.2 mm overall body length excluding output shaft |
| Motor-can drawing | 15.2 +/-0.3 mm length;12.1 mm maximum diameter |
| Output shaft | 3 mm diameter D-shaft;2.5 mm across flat |
| Projection choices | 4.4 mm or10 mm in actual available combinations |
| Mounting drawing | Separate2-M1.4 and2-M1.6 callouts; follow matching drawing orientation |
| Net motor mass | Approximately10.5 g |
| Direction | Reversible with appropriate DC polarity/control |
Selection Guide
The Gear Ratio and Shaft selector combines two mechanical choices while keeping package and voltage separate. Only listed combinations are offered. The package photograph is shared across its winding, ratio and shaft-length variants; confirm the selected shaft projection in the option value.
Performance by Winding Voltage
Tables apply to the named motor version and ratio. The210:1 column is a family reference, not a purchasable option here. No-load, rated and stall values describe different conditions. Maximum momentary torque is a limit and must not be treated as continuous output.
12V
Maximum power reference 1.3 W; no-load current ≤40 mA; stall current ≤0.75 A.
| Ratio | No-load rpm | Rated kgf·cm | Rated rpm | Rated current A max | Stall / momentary torque kgf·cm |
|---|---|---|---|---|---|
| 10:1 | 2150 | 0.1 | 1200 | 0.3 | 0.2 |
| 20:1 | 1050 | 0.2 | 600 | 0.3 | 0.4 |
| 30:1 | 720 | 0.3 | 400 | 0.3 | 0.6 |
| 50:1 | 430 | 0.5 | 240 | 0.3 | 1.0 |
| 100:1 | 215 | 1 | 120 | 0.3 | 2.0 |
| 150:1 | 140 | 1.5 | 80 | 0.3 | Max3.0 |
| 210:1 | 100 | 2 | 57 | 0.3 | Max3.0 |
| 298:1 | 72 | 2 | 50 | 0.25 | Max3.0 |
| 380:1 | 56 | 2 | 45 | 0.2 | Max3.0 |
6V
Maximum power reference 0.35 W; no-load current ≤30 mA; stall current ≤0.45 A.
| Ratio | No-load rpm | Rated kgf·cm | Rated rpm | Rated current A max | Stall / momentary torque kgf·cm |
|---|---|---|---|---|---|
| 10:1 | 1050 | 0.05 | 600 | 0.16 | 0.1 |
| 20:1 | 530 | 0.1 | 300 | 0.16 | 0.2 |
| 30:1 | 360 | 0.15 | 200 | 0.16 | 0.3 |
| 50:1 | 210 | 0.25 | 120 | 0.16 | 0.5 |
| 100:1 | 107 | 0.5 | 60 | 0.16 | 1.0 |
| 150:1 | 70 | 0.7 | 40 | 0.16 | 1.5 |
| 210:1 | 50 | 1 | 28 | 0.16 | 2.0 |
| 298:1 | 36 | 1.4 | 20 | 0.16 | 3.0 |
| 380:1 | 28 | 2 | 15 | 0.16 | 3.0 |
3V
Maximum power reference 0.65 W; no-load current ≤70 mA; stall current ≤1.6 A.
| Ratio | No-load rpm | Rated kgf·cm | Rated rpm | Rated current A max | Stall / momentary torque kgf·cm |
|---|---|---|---|---|---|
| 10:1 | 1750 | 0.07 | 870 | 0.75 | 0.2 |
| 20:1 | 870 | 0.14 | 430 | 0.75 | 0.3 |
| 30:1 | 580 | 0.2 | 290 | 0.75 | 0.5 |
| 50:1 | 350 | 0.45 | 174 | 0.75 | 0.7 |
| 100:1 | 175 | 0.7 | 87 | 0.75 | 1.4 |
| 150:1 | 115 | 1 | 58 | 0.75 | Max3.0 |
| 210:1 | 83 | 1.4 | 40 | 0.75 | Max3.0 |
| 298:1 | 58 | 2 | 29 | 0.75 | Max3.0 |
| 380:1 | 46 | 2.5 | 23 | 0.75 | Max3.0 |
Installation and Control
Use a regulated DC supply matched to the selected winding. Keep clear of moving gears and the output shaft, and confirm mounting thread, shaft fit and clearances before assembly. Reverse polarity only where the connected control circuit permits it. Avoid overload, sustained stall and forcing the gearbox output.
The optional PWM board is a speed-control accessory, not a feedback sensor or closed-loop position controller. Match its actual input-voltage and current capability to the selected motor and operating load before wiring. Motor stall-current values do not establish a controller rating. Neither package includes a power supply.
Applications
For compact camera-rotation mechanisms, small positioning platforms, motorized selfie-stick mechanisms and miniature robot drive functions within the selected motor ratings. Use appropriate external controls and supports for the intended load.
What's Included
One selected coreless gear motor. The Motor + PWM Controller package additionally includes one small PWM control board. Power supply, mounting bracket, shaft coupling, complete camera platform and robot are not included.
FAQ
Does one winding cover all three voltage tables?
No. Choose the motor version for its named3V,6V or12V supply; performance tables apply separately to those versions.
Is the210:1 ratio available?
It is shown only as a family performance reference. Purchase only the ratio-and-shaft combinations listed in the selector.
Why do different shaft options share a photo?
The package uses a shared reference photograph. The selected4.4 mm or10 mm projection is specified in the option value.
Visual Details
