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Today we are going to introduce a new partner is the A81FHM programmable standard digital servo with 74KG super torque. The design feature of this new product is the use of high-quality 4-poles brushless motors, and the metal four bearing adopts dust-proof bearing, which effectively improve the product's sealing and dust-proof and splash-proof effects. In addition, its sturdy new shape CNC shell adopts a fast cooling design of the heat sink, which can achieve a good heat dissipation effect while the product is working and prevent the phenomenon of being hot. It is very suitable for scenes that require large torque applications, such as some large rc aircraft, 1/8 1/10 scale rc off-road vehicles, monster trucks, and crawler car competitions. 

Feature 

High Performance Digital Standard Powerful Servo

High Quality Long Lifespan 4-Poles Brushless Motor

Heat Sink Fast Cooling CNC Case Design

Enhanced Steel Gears And Pin Shaft

Strong Sealing And Dustproof Metal Four Bearings

High Precision 25T Horn Gear Spline

Support Programmable User Parameters

Ideal For 1/8 1/10 On-Road, Off-Road, Monster Truck, Large Size Plane, Helicopter, Robot And Engine Etc.

Specification

Operating speed: 0.190sec/60° @ 4.8V

Operating speed: 0.135sec/60° @ 7.4V

Stall Torque: 45 kg-cm (625 oz-in) @ 4.8V

Stall Torque: 65 kg-cm (903 oz-in) @ 7.4V

Gear: SteelSize: 40*20*38mm (1.57 x 0.78 x 1.5 in)

Connector Wire: TYU 300 mm / 22AWG

Weight: 85g 

Motor: 4-Poles Brushless Motor

Stall Torque: 74 kg-cm (1028 oz-in) @ 8.4V 

Stall Torque: 55 kg-cm (764 oz-in) @ 6.0V

Operating speed: 0.125sec/60° @ 8.4V 

Operating speed: 0.165sec/60° @ 6.0V

Operating Voltage: 4.8-8.4V

Signal Mode: Digital
Control System: Pulse width modulation control
Refresh Rate: 333Hz
Neutral Position: 1520uS
Dead band: 2 uSec
Operating Voltage: 4.8V~8.4V
Operating Travel: 180°±10°
Mechanical Angle: 220°
Signal Range: 500 to 2500 uSec
Angle Sensor: Potentiometer
Temperature: -15C°~ +70C°
Motor Type: 4-Poles Brushless
Motor Drive: FET Drive
Horn Gear Spline: 25T-φ5.92mm
Programmable: Yes
Waterproof Level: No
Bearing: Four Ball Bearings
Bearing Material: Metal
Gear Material: Strength Steel
Case Material: AL6061T6
Certification: CE,FCC,RoHs
Wire Guage: TYU 300mm / 22AWG
Net Weight: 85g(3.00oz)
Product Size: 40*20*38mm (1.57 x 0.78 x 1.5 in)