MKS Servos HV777A+ Coreless Titanium Gear High Torque Digital Servo (High Voltage)
About this part
This is an MKS HV777A+ Coreless Titanium Gear High Torque Digital Servo with an Aluminum Upper Case.
Specifications:
- Torque:
- @6.0V: 409.7 oz-in (28 kg-cm)
- @7.4V: 506 oz-in (36.5 kg-cm)
- @8.2V: 561.1 oz-in (38 kg-cm)
- Speed:
- @6.0V: 0.13 s
- @7.4V: 0.11 s
- @8.2V: 0.10 s
- Weight: 75.45 g
- Dimension: 40x20x45mm
- Working Voltage: 4.8 ~ 8.4 V DC Volts (2S Lipo un-regulated)
- Working Frequency: 1520?s / 333hz
- Dead Band: 0.0008 ms (Default)
- Bearing: Double bearings
- Motor: Coreless Motor
- Gear: Titanium alloy gear
Reviews3.7 · 6 reviews
Same exact issue slow start changes speed MKS changed something now they want $15 more per servo and is junk. Check out Promodeler's servos my new goto servo. Mks was the standard now they seem to be on the path to extinct if they don't get this under control . I was told by Thomas at MKS that its me well the other 200 servos i bought had no issues.
Very powerful servo for the price. I'm using this servo in two crawlers. A small tire Enduro and in my SSD trail king. My only complaint is that it sounds like a miniature outrunner motor. Is has a distinct high pitched whine that sounds like a revolver spooling up. Other than that it's been a solid performer. I'm sure the noise is non-issue for it's intended aviation use.
These are excellent servos for a decent price. The posted specs on these servos are actually accurate! The order placement, processing, and package delivery from A Main Hobbies was trouble-free. Customer support during the transaction was also timely and helpful. These servos are perfect for a 50cc airframe
Just the like info says great servo...fast service..........
I am using the MKS, HV777+ servos in large acrobatic gas powered aircraft. I have found these servos to perform flawlessly. The gear train is very smooth. The servo response time is very fast. Quality seems to be second to none. I have had only positive experiences with them, and I am planning to install them in my next turbine project. The folks at AMAIN Hobbies have always been helpful and getting me my orders processed quickly.
Reviews are split. Several five-star reviewers praise the servo's power, accurate specs, smooth gear train and fast response for crawlers and large aircraft, and report positive seller service. Two one-star reviewers report a recurring fault: slow start, random speed changes and stalling during movement, with one citing a 50% failure rate across orders and the other saying the manufacturer did not respond to contact. One of them also describes a price increase. One five-star reviewer notes a high-pitched whine under load. Reviews do not clearly establish whether the fault applies to all units or a specific production batch.
- + High torque for the price
- + Smooth gear train and fast response
- + Specs described as accurate
- + Good seller service
- − Slow start and random speed changes reported
- − Stalling during movement in some units
- − High-pitched whine in use
- − Manufacturer support reported as unresponsive