Replaces HS-5685MH. 

The metal D-645MW 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 industry standard 25-tooth output spline with 3mm hex screw, each D-Series servo brings monster performance never known before in the market.

Features

Programmable PWM Digital Amplifier
32-Bit MCU with 12-Bit ADC Circuitry
4096 Resolution
1M Cycle Long Life Potentiometer
Wide Operating Voltage (4.8 ~ 8.4 Volts DC)
Dual Ball Bearing Supported Output Shaft
25-Tooth Output Spline

Programmable Functions

End Point Adjustments
Direction
Fail Safe
Dead Band
Speed (Slower)
Soft Start Rate
Overload Protection
Data Save / Load
Program Reset

Accessories

Metal Gears Set | Link |
Metal / Plastic 1st Gear Set | Link |
Plastic Case Set | Link |
Applicable Horns | Link 1 o 2 o 3 |
D645MW Servo Specifications
Performance Specifications

Operating Voltage Range (Volts DC) 4.8V ~ 6.0V ~ 7.4V
Speed (Second @ 60?) 0.28 ~ 0.20 ~ 0.17
Maximum Torque Range oz. / in. 115 ~ 158 ~ 180
Maximum Torque Range kg. / cm. 8.3 ~ 11.3 ~ 12.9
Current Draw at Idle 30 mA
No Load Operating Current Draw 500 mA
Stall Current Draw 2,650 mA
Dead Band Width 2 us

Physical Specifications

Dimensions (Inches) 1.59 x 0.77 x 1.48
Dimensions (Metric) 40.6 x 19.8 x 37.8
Weight (Ounces) 2.11
Weight (Gram) 57.0
Circuit Type 32bit Programable Digital
Motor Type 3 Pole Metal Brush Ferrite
Gear Material Metal
Bearing Type Dual Ball Bearing
Output Shaft (type / ?mm) H25T
Case Material Plastic
Dust / Water Resistance N / A
Connector Gauge (AWG) / Strand Count 22 / 60

Radio Control Applications

Parkflyer N / A
Sport Plane 12 - 15 lbs.
Sailplane 2 meters and up
3D Performance 12 - 15 lbs.
Scale 12 - 15 lbs.
Electric Helicopter 600mm
Gas Helicopter 50 - 59 Class
On Road 1/10th
Monster Truck 1/10th
Buggies 1/10th
Truggies 1/10th
Short Course / Truck 1/10th
Crawlers N / A
Sail Boat = >1M & Scale
Power Boat 1/10th