Steel Gear 45KG 0.085S Ultra Torque HV Magnetic Waterproof BLS RC Steering Servo (A81BHMW)

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AGFRC 45KG IP67-Waterproof Steering Servo High Torque Programmable Full Metal Gear Digital Brushless RC Servo for 1/8 1/10 RC Models, 180 °(A81BHMW)

The A81BHMW programmable waterproof standard digital multi-function servo is one of AGFRC's bestsellers. Its reliable performance and design are welcomed by many enthusiasts. Driven at the highest voltage of 8.4V, the maximum torque can reach 45Kg-cm, and the fastest speed can reach 0.085Sec/60°. The torque and speed can meet the needs of most customers and are very suitable for 1/8 1/10 scale models. 

The highlight of its internal structure design is composed of reinforced steel gears and shafts, high-efficiency brushless motors, and silk-smooth three bearings. With these supports, the servo can achieve the best smooth operation. If your training time and competition are long, you don't have to worry about the servo overheating phenomenon under long-term work, because its CNC shell cooling groove can quickly cool and dissipate heat. And its magnetic sensor waterproof IP67 function allows the model to achieve freedom of sea, land and air. You don't have to worry about rain in the wet sky when flying, rc boat enthusiasts can also train on streams and seaside, And it runs fast even on muddy ground and thick snow.


Ultra Light Unique Design

High Performance Standard Digital Servo

Fast Cooling Heat Sink Case

Strengthen High Chrome Steel Shaft

Extra Strong Patent Steel Gears

Super Strong Three Ball Bearings

High Efficiency Bruhless Motor

Programmable Digital Circuit

Magnetic Sensor Waterproof IP67

Ideal for 1/10, 1/8  On Road, Off road, Truck, Airplane, Helicopter and Engine etc.


Model Name: A81BHMW

Operating Voltage: 4.8-8.4 V

Operating speed: 0.115sec/60° @ 6.0V

Operating speed: 0.100sec/60° @ 7.4V 

Operating speed: 0.085sec/60° @ 8.4V 

Stall Torque: 34 kg-cm (473 oz-in) @ 6.0V

Stall Torque: 39 kg-cm (542 oz-in) @ 7.4V

Stall Torque: 45 kg-cm (625 oz-in) @ 8.4V 

Gear: Steel

Motor: BLS

Size: 40*20*37.5mm (1.57 x 0.78 x 1.46 in)

Weight: 83g 

Connector Wire: JR 300 mm

Iterm Name:
Signal Mode:
Control System:
Pulse Width Modulation Control
Refresh Rate:
Neutral Position:
Dead band:
2 uSec
Operating Voltage:
Operating Travel:
Mechanical Angle:
No Limit
Signal Range:
500 to 2500 uSec
Angle Sensor:
Magnet Angle Sensor
-15C°~ +70C°
Motor Type:
Motor Drive:
FET Drive
Horn Gear Spline:
Three Ball Bearings
Bearing Material:
Gear Material:
Strength Steel
Case Material:
Wire Guage:
JR 300mm / 22AWG
Net Weight:
Product Size:
Recent Reviews ( 12 )
I use this on my HPI Savage XL Flux with bigger wheels. It works with no problem. super strong.

0 out of 0 found this review helpful.

So far so good. Replaced the stock servo in my Axial Wraith Spawn.

0 out of 0 found this review helpful.

Works good on my Capra, and is pretty strong.

0 out of 0 found this review helpful.

es un excelente producto tiene muy buen torque y funciona perefecto en mi crawler

0 out of 0 found this review helpful.

Installed this into an SCX 10.3. I have yet to test it on a rock trail but so far it has been reliable.

0 out of 0 found this review helpful.

this is a great product

0 out of 0 found this review helpful.

So far, so good. This servo is doing the job! I had to buy more as high quality.

0 out of 0 found this review helpful.

Quick and strong, it is a good buy.

0 out of 0 found this review helpful.

This was exactly the right size and so far it is holding up great. I'm not the best driver and I keep hitting stuff that destroyed the stock servo in short order. This one has been going strong now for a full 2 months, it is not the weak link in the steering gear now.

0 out of 0 found this review helpful.

Brought to replace the steering servo on my Traxxas Defender it fitted very easy and the cable was plenty long enough to reach receiver, I have now brought a spare for the future as I intend taking my Trx-4 on holiday to use.

0 out of 0 found this review helpful.

No problem at all moving tires in all situations so far. Since installation, only time I've had time to drive is in the rain. So 4 hrs of water and mud with zero problems . Metal arm is nice so that's one less thing to worry about. Will definiely be buying more as I upgrade my other builds

0 out of 0 found this review helpful.

Servo and arm fits perfect into Traxxas TRX4 rock crawler. Look up in the forums on how to switch servo direction if needed. Plenty strong enough for my stock TRX4.

0 out of 0 found this review helpful.