The steel D-840WP is part of our D-Series servo line. All Hitec D-Series servos have been designed using our brand new, cutting edge, custom engineering. Combining industry leading high-resolution, state-of-the-art ultra-response technology with a 32-bit MCU and 12-bit ADC for unprecedented programmability and flexibility, these servos deliver significantly smoother movement. The speedy, powerful line operates on a wide 4.8 ~ 8.4 voltage range, allowing use with any common battery chemistry without the need for adapters or regulators. Featuring Hitec’s 15 tooth HD output spline with 3mm hex screw, each D-Series servo brings monster performance never known before in the market.

Performance Specifications
Operating Voltage Range (Volts DC) 4.8V ~ 6.0V ~ 7.4V
Speed (Second @ 60°) 0.17 ~ 0.14 ~ 0.11
Maximum Torque Range kg. / cm. 19.0 ~ 24.0 ~ 30.0
Current Draw at Idle 30 mA
No Load Operating Current Draw 1,600 mA
Stall Current Draw 9,000 mA
Dead Band Width 2 µs

Physical Specifications
Dimensions (Metric) 66 x 32 x 62
Weight (Gram) 227.0
Circuit Type Digital Amplifier with Mosfet Drive
Motor Type 5 Poles Cored Metal Brush
Gear Material Steel
Bearing Type Dual Ball Bearing
Output Shaft (type / Ømm) Mega 15
Case Material Plastic / Aluminum
Dust / Water Resistance IP 67
Connector Gauge (AWG) / Strand Count 25 / 80

Radio Control Applications
Scale > 40%
On Road 1/4th & 1/5th
Monster Truck 1/4th & 1/5th
Buggies 1/4th & 1/5th
Truggies 1/4th & 1/5th
Short Course / Truck 1/4th & 1/5th
Sail Boat = >1M & Scale
Power Boat 1/5th & Up Scale