The 35KG high torque and high voltage programmable standard servo A81BHSW has always been loved by many 1/8 1/10 scale model enthusiasts. It adopts an all-aluminum heat dissipation shell design, which can prevent the servo from becoming hot during operation, and at the same time ensure that the shell has sufficient strength to resist shocks. In addition, its internal structure gear adopts high-precision reinforced steel gear and reinforced shaft, which not only has strong occlusal force, but also can closely cooperate with the operation of the servo with the silk-smooth three-bearing. When driven by the highest voltage of 8.4V, the fastest speed can reach 0.075Sec, which is very suitable for off-road vehicle competition. Of course, IP67 waterproof and dustproof function is essential, suitable for a variety of harsh weather and environments. Such as wet rainy days, thick snow, sand dunes, streams, muddy etc.

Feature 

High Performance Standard Digital Servo

Heat Sink Fast Cooling Design

Strengthen High Chrome Steel Shaft

Extra Strong Patent Steel Gears

Super Strong Three Ball Bearings

Long Lifespan Brushless Motor

Programmable Digital Circuit

High Precision Magnetic Sensor

Fully Waterproof Up To IP67 Grade

Ideal for 1/8 & 1/10 Scale On road, off road, Truck, Boat, Airplane, Helicopter, Robot and engine etc.

Here is the introudction for the servo A81BHSW: https://www.youtube.com/watch?v=rr50R2yRVu0

Specification

Item: A81BHSW

Operating Voltage: 4.8-8.4V

Operating speed: 0.097sec/60° @ 6.0V

Operating speed: 0.086sec/60° @ 7.4V 

Operating speed: 0.075sec/60° @ 8.4V 

Stall Torque: 28 kg-cm (389 oz-in) @ 6.0V

Stall Torque: 31 kg-cm (431 oz-in) @ 7.4V

Stall Torque: 35 kg-cm (486 oz-in) @ 8.4V 

Gear: Steel

Motor: BLS

Size: 40*20*37.5mm (1.57 x 0.78 x 1.47 in)

Weight: 83g 

Connector Wire: TYU 300 mm