Hitec HS-645MD High Torque Metal Gear Servo

By:hitec rc usa




The powerful HS-645MG is one of Hitecs most popular analog servos. Its the perfect choice for those larger sport planes or monster trucks and buggies requiring a durable high torque servo. Featuring our unique M/P and metal gear train technology, the HS-645MG offers one of the strongest gear trains available in any servo.


  • Top Selling High Torque Metal Gear Servo
  • Strong Three-Pole Ferrite Motor
  • Heavy Duty Metal Gear Train Featuring our Revolutionary Metal/Plastic First Gear (MP Gear)
  • Dual Ball Bearing-Supported Output Shaft

HS-645MG Servo Specifications

Performance Specifications
Operating Voltage Range (Volts DC)4.8V 6.0V
Speed (Second @ 60)0.24 0.20
Maximum Torque Range oz. / in.107  133
Maximum Torque Range kg. / cm.7.7  9.6
Current Draw at Idle9.1 mA
No Load Operating Current Draw450 mA
Stall Current Draw2,500 mA
Dead Band Width8 s
Physical Specifications
Dimensions (Inches)1.59 x 0.77 x 1.48
Dimensions (Metric)40.6 x 19.8 x 37.8
Weight (Ounces)1.94
Weight (Gram)55.2
Circuit TypeHT7003 Analog SMT
Motor Type3 Pole Metal Brush Ferrite
Gear MaterialMetal
Bearing TypeDual Ball Bearing
Output Shaft (type / ├śmm)Standard 24
Case MaterialPlastic
Dust / Water ResistanceN / A
Connector Gauge (AWG) / Strand Count22 / 60

Used with permission, Copyright 2013 Hitec RCD USA, Inc.
Copyright 2013 Brey Corp. t/a Hobby Works

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