Hitec HS-645MG High-Torque Metal Gear Analog Servo – HRC32645S
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Hitec HS-645MG High-Torque Metal Gear Analog Servo
The Hitec HS-645MG is a proven standard-size analog servo designed for RC applications requiring dependable torque and durable construction. Delivering up to 133.3 oz-in of torque at 6.0 volts, it is an excellent choice for larger sport airplanes, scale models, RC trucks, buggies, crawlers, boats, and other high-load control applications.
A durable metal and MP gear train, cored metal-brush motor, and dual ball-bearing-supported output shaft provide smooth operation and reliable performance under load. The standard Hitec 24-tooth output spline accepts compatible Hitec servo horns and arms.
Note: The HS-645MG is an analog servo. The HS-5645MG is the related programmable digital version and is a separate product.
Key Features
- High-torque standard-size analog servo
- Up to 133.3 oz-in (9.6 kgf-cm) of torque at 6.0V
- Heavy-duty gear train with one MP gear and three metal gears
- Cored metal-brush motor
- Dual ball-bearing-supported output shaft
- Standard Hitec 24-tooth output spline
- Suitable for aircraft, surface vehicles, boats, and other high-load applications
- Universal-style receiver connector
Performance Specifications
| Control Type | Analog |
|---|---|
| Operating Voltage | 3.5–6.8V DC (2S LiFe) |
| Torque at 4.8V | 106.9 oz-in (7.7 kgf-cm) |
| Torque at 6.0V | 133.3 oz-in (9.6 kgf-cm) |
| Speed at 4.8V | 0.24 sec/60° |
| Speed at 6.0V | 0.20 sec/60° |
Physical Specifications
| Servo Size | Standard |
|---|---|
| Dimensions | 1.60 × 0.78 × 1.49 in. (40.6 × 19.8 × 37.8 mm) |
| Weight | 1.95 oz. (55.2 g) |
| Motor Type | Cored metal-brush motor |
| Gear Train | One MP gear and three metal gears |
| Bearings | Dual ball bearing |
| Output Spline | Hitec 24T |
| Case Material | Engineering plastic |
Recommended RC Applications
| Sport Airplane | 12–15 lb. |
|---|---|
| 3D Airplane | 12–15 lb. |
| Scale Airplane | 12–15 lb. |
| Sailplane | 2 meters and larger |
| On-Road Vehicle | 1/10 scale |
| Monster Truck | 1/10 scale |
| Buggy, Truggy or Short-Course Truck | 1/10 scale |
| Rock Crawler | 1/12 scale |
| Sailboat | 1 meter and larger or scale models |
| Power Boat | 1/10 scale |
Product Information
- Manufacturer: Hitec RCD
- Model: HS-645MG
- Manufacturer Part Number: 32645S
- Gator RC SKU: HRC32645S
Application recommendations are general manufacturer guidelines. Confirm that the servo's torque, speed, dimensions, voltage range, and 24T output spline are appropriate for your model before installation. Although Hitec lists operation up to 6.8V for a 2S LiFe source, this servo is not rated for direct connection to an unregulated 2S LiPo battery.