This is the Hitec High Votage D645MW High Torque Metal Gear Servo. The metal D-645MW is part of Hitec's D-Series servo line. All Hitec D-Series servos have been designed using Hitec's redesigned, 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.

• 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

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

Operating Voltage Range (Volts DC): 4.8V - 8.4V

Speed/Torque Value Voltages (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 µs

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 / Ømm): H25T

Case Material: Plastic

Dust/Water Resistance: N/A

Connector Gauge (AWG)/Strand Count: 22/60

• Metal Gears Set 
• Metal Plastic 1st Gear Set 
• Plastic Case Set
• Applicable Horns