CHIHAI GW12T-N20VA Steel-Plate Worm Gear Motor, 3V / 6V / 12V
CHIHAI GW12T-N20VA Steel-Plate Worm Gear Motor, 3V / 6V / 12V
CHIHAI MOTOR
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Overview
The CHIHAI MOTOR CHF-GW12T-N20VA is a miniature DC gear motor with a steel-plate frame, metal gearing and a right-angle worm drive. Its 3 mm D-shaped output shaft provides compact low-speed motion for small mechanisms. Select the package, reduction ratio and actual voltage/winding combination required for your project.
Features
- Steel plates and three support/mounting positions around the compact gearbox.
- Copper-wound armature and metal reduction gears.
- 3 mm D-shaft with an 8 mm nominal projection.
- Reversible DC operation and speed adjustment using a compatible external PWM controller.
- Optional solder-free connection board, PWM controller, power supply and mounting-bracket packages.
Configuration Guide
The B45 winding is offered with 236:1 or 302:1 reduction at 3 V or 6 V. The A35 winding is offered with 1030:1 reduction at 6 V or 12 V. These are the available combinations; voltage and winding are part of the selected configuration, not a universal 3–12 V rating for every motor. Packages each contain one motor.
Specifications
| Parameter | Specification |
|---|---|
| Model | CHF-GW12T-N20VA |
| Drive | Permanent-magnet brushed DC motor with worm reduction |
| Frame / gearing | Steel-plate frame and metal gears |
| Output shaft | 3 mm diameter D-shaped shaft; 8.0 ± 0.3 mm projection |
| Gearbox envelope reference | 12 mm width × 18 mm length × 10 mm height |
| Input motor length reference | 15.2 mm, excluding rear shaft extension |
| Motor mass | Approximately 13 g, motor only |
| Mounting | Three 1.4 mm holes for matched M1.4 screws; insertion depth must clear gears |
| Available ratios | 236:1 and302:1 with3V/6V B45;1030:1 with6V/12V A35 |
| Speed / direction control | External compatible PWM controller; reverse motor polarity to reverse rotation |
Performance by Available Configuration
| Winding | Supply | Ratio | No-load rpm | Rated rpm | Rated torque kg·cm | No-load mA | Rated A | Stall A | Stall torque kg·cm |
|---|---|---|---|---|---|---|---|---|---|
| B45 | 3 V | 236:1 | 45 | 33 | 0.16 | ≤35 | ≤0.15 | ≤0.35 | ≤0.4 |
| B45 | 3 V | 302:1 | 35 | 26 | 0.2 | ≤35 | ≤0.15 | ≤0.35 | ≤0.50 |
| B45 | 6 V | 236:1 | 94 | 70 | 0.32 | ≤80 | ≤0.20 | ≤0.65 | ≤0.8 |
| B45 | 6 V | 302:1 | 74 | 55 | 0.4 | ≤80 | ≤0.20 | ≤0.65 | ≤1.10 |
| A35 | 6 V | 1030:1 | 11 | 7 | 0.6 | ≤35 | ≤0.15 | ≤0.4 | ≤1.5 |
| A35 | 12 V | 1030:1 | 22 | 15 | 1.2 | ≤65 | ≤0.15 | ≤0.4 | ≤3.0 |
Performance values apply at the stated motor supply and reduction ratio. Load and controller settings affect speed. Stall figures describe a blocked shaft and do not establish safe continuous operation; avoid sustained stall or overload. The full series tables below also show reference ratios that are not offered as available selections on this page. A35 table power references are 0.1 W at 6 V and 0.2 W at 12 V; B45 table references are 0.15 W at 3 V and 0.6 W at 6 V. These references are not a universal output-power rating.
Installation and Operation
Match the chosen winding voltage, power supply and controller. Use the dimension drawing to check the shaft, mount and coupling before machining. Select screw length so fasteners cannot touch the moving gears. Disconnect power before wiring or assembly, and keep fingers, wires and loose objects away from the exposed gear train.
Reversing the motor polarity reverses rotation. The worm drive resists back-driving, but holding behavior depends on configuration and load; provide a separate holding device wherever unintended movement would matter. Do not use sustained stall as a brake. Check any included power-supply label and connector polarity before connecting it to the selected motor. Power-supply wattage, mains plug and controller current rating are not specified as universal package properties.
Applications
Compact robot joints, small grippers, focus-adjustment mechanisms, miniature positioning devices and model mechanisms where the selected speed, torque and mounting interface fit the application. Couplings, linkages and driven devices require separate mechanical integration.
What's Included
| Selected package | Contents |
|---|---|
| Motor Only | 1 motor |
| Motor + Green Bracket | 1 motor + 1 green mounting bracket |
| Motor + PWM Controller | 1 motor + 1 small PWM controller |
| Motor + Connection Board | 1 motor with solder-free connection board and red/black lead |
| Motor + Board + PWM Controller | Board-equipped motor and lead + 1 PWM controller |
| Motor + Power Supply | 1 motor + 1 power supply |
| Motor + Power Supply + PWM Controller | 1 motor + 1 power supply + 1 PWM controller |
| Motor + Board + Power Supply + PWM Controller | Board-equipped motor and lead + 1 power supply + 1 PWM controller |
| Motor + White Bracket | 1 motor + 1 white mounting bracket |
| Motor + PWM Controller + Green Bracket | 1 motor + 1 PWM controller + 1 green mounting bracket |
Only the items listed for the selected package are supplied. No battery, coupling, driven mechanism or complete robot is included. Mounting screws are not specified as included.
FAQ
Can every configuration run at 12 V?
No. Use the voltage shown in the selected Voltage and Winding option. The 12 V A35 motor is a separate configuration from the 3 V and 6 V B45 versions.
Does every package include a speed controller or power supply?
No. Select a package explicitly listing those components. Motor Only includes the motor without those accessories.
Is the output locked whenever power is removed?
Worm gearing resists back-driving, but holding depends on the load and configuration. Use an independent holding device where movement must be prevented.
Visual Details
