MKS HV777A+ Coreless Titanium Gear High Torque High Voltage Digital Servo
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The MKS HV777A+ is a coreless titanium gear high-torque high-voltage digital servo with an aluminum upper case. Running on 4.8–8.4V (2S LiPo unregulated), it delivers 561.1 oz/in (38 kg/cm) at 8.2V with a 0.10 sec/60° transit speed — combining exceptional torque and speed for demanding 1/8 and 1/10 scale surface and large-scale aircraft applications.
A coreless motor delivers instant response and precise centering. Titanium alloy gears provide excellent strength-to-weight ratio and wear resistance under sustained high-load use. Double bearings ensure smooth, consistent output shaft operation run after run. The aluminum upper case adds rigidity and heat dissipation.
Key Features
- Coreless motor for instant response and precise centering
- Titanium alloy gears for strength and wear resistance
- 561.1 oz/in (38 kg/cm) stall torque at 8.2V
- 0.10 sec/60° transit speed at 8.2V
- 4.8–8.4V operating range (2S LiPo unregulated compatible)
- Aluminum upper case for rigidity and heat dissipation
- Double bearings for smooth, consistent operation
- 40 x 20 x 45mm, 75.45g
Specifications
| Part Number | HV777A+ | |
| Operating Voltage | 4.8 – 8.4V DC (2S LiPo unregulated) | |
| Stall Torque (6.0V) | 28 kg/cm — 409.7 oz/in | |
| Stall Torque (7.4V) | 36.5 kg/cm — 506 oz/in | |
| Stall Torque (8.2V) | 38 kg/cm — 561.1 oz/in | |
| Speed (6.0V) | 0.13 sec/60° | |
| Speed (7.4V) | 0.11 sec/60° | |
| Speed (8.2V) | 0.10 sec/60° | |
| Motor Type | Coreless Motor | |
| Gear Type | Titanium Alloy Gear | |
| Bearing Type | Double Bearings | |
| Working Frequency | 1520μs / 333Hz | |
| Dead Band | 0.0008ms (default) | |
| Dimensions | 40 x 20 x 45mm | |
| Weight | 75.45g | |
Compatibility
Suitable for 1/8 and 1/10 scale surface RC vehicles and large-scale aircraft requiring a high-torque high-voltage coreless servo. Compatible with 2S LiPo unregulated power. Verify receiver/ESC BEC voltage output and servo bay dimensions before purchasing.