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The powerful HS-645MG is one of Hitec’s most popular servos. It’s 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.
Specifications
| Motor Type: | 3 Pole |
| Bearing Type: | Dual Ball Bearing |
| Speed (4.8V/6.0V): | 0.24 / 0.20 |
| Torque oz./in. (4.8V/6.0V): | 107 / 133 |
| Torque kg./cm. (4.8V/6.0V): | 8.0 / 10.0 |
| Size in Inches: | 1.59 x 0.77 x 1.48 |
| Size in Millimeters: | 40.39 x 19.56 x 37.59 |
| Weight ounces: | 1.94 |
| Weight gram: | 55 |
Equipments required
 | KAV20.3712 Name: Servo arm Double 114mm (4,5") 25teeth M3 Price: 17,46€  Delivery status: in stock at supplier Aluminium double servo arm with offset for servos with 25teeth output shaft (Hitec Dxxx/HS-8xxx/HSB-9xxx, Savöx a Futaba). Made of aluminium, with M3 threads for ball links. Distance between M3 holes: 114mm ; 102mm ; 89mm ; 76,5mm ; 63,5mm. |
 | KAV20.3711 Name: Servo arm Double 89mm (3,5") 25teeth M3 Price: 16,63€ Delivery status: in stock at supplier Aluminium double servo arm for servos with 25teeth output shaft (Hitec Dxxx/HS-8xxx/HSB-9xxx, Savöx a Futaba). Made of aluminium, with M3 threads for ball links. Distance between M3 holes: 89mm ; 76,5mm ; 63,5mm. |
 | KAV20.3706 Name: Servo arm 51mm (2") 25teeth M3 Price: 13,71€ Delivery status: in stock at supplier Aluminium servo arm for servos with 25teeth output shaft (Hitec Dxxx/HS-8xxx/HSB-9xxx, Savöx a Futaba). Made of aluminium, with M3 threads for ball links. Distance between servo shaft and M3 holes: 36mm ; 42,5mm ; 51mm. |
 | KAV20.3710 Name: Servo arm Double 64mm (2,5") 25teeth M3 Price: 13,71€ Delivery status: in stock at supplier Aluminium double servo arm for servos with 25teeth output shaft (Hitec Dxxx/HS-8xxx/HSB-9xxx, Savöx a Futaba). Made of aluminium, with M3 threads for ball links. Distance between M3 holes: 64mm ; 50mm ; 38mm. |
 | KAV20.3705 Name: Servo arm 45mm (1,75") 25teeth M3 Price: 12,04€ Delivery status: in stock at supplier Aluminium servo arm for servos with 25teeth output shaft (Hitec Dxxx/HS-8xxx/HSB-9xxx, Savöx a Futaba). Made of aluminium, with M3 threads for ball links. Distance between servo shaft and M3 holes: 45mm ; 38mm ; 32mm. |
 | KAV20.3704 Name: Servo arm 38mm (1,5") 25teeth M3 Price: 11,21€ Delivery status: in stock at supplier Aluminium servo arm for servos with 25teeth output shaft (Hitec Dxxx/HS-8xxx/HSB-9xxx, Savöx a Futaba). Made of aluminium, with M3 threads for ball links. Distance between servo shaft and M3 holes: 38mm ; 32mm. |
 | PTSFH425 Name: Servo frame Hitec HS-425/645/5625MG/5665/5685MH (1 pair) Price: 11,00€ Delivery status: 1 week Servo frame designed for Hitec HS-425/645/5625MG/5665/5685MH. Sold by 1paar (left + right). Frame for assembling the srvos in the wings of the models. The frames are made of plywood and it supplied in pairs with servo mounting accessories. |
 | KAV20.3701 Name: Servo arm 32mm (1,25") 25teeth M2 Price: 10,79€ Delivery status: in stock at supplier Aluminium servo arm for servos with 25teeth output shaft (Hitec Dxxx/HS-8xxx/HSB-9xxx, Savöx a Futaba). Made of aluminium, with M3 threads for ball links. Distance between servo shaft and M3 holes: 32mm ; 25,5mm. |
 | KAV20.3703 Name: Servo arm 32mm (1,25") 25teeth M3 Price: 10,79€ Delivery status: in stock at supplier Aluminium servo arm for servos with 25teeth output shaft (Hitec Dxxx/HS-8xxx/HSB-9xxx, Savöx a Futaba). Made of aluminium, with M3 threads for ball links. Distance between servo shaft and M3 holes: 32mm ; 25,5mm. |
 | KAV20.3702 Name: Servo arm 25mm (1") 25teeth M3 Price: 9,96€ Delivery status: in stock at supplier Aluminium servo arm for servos with 25teeth output shaft (Hitec Dxxx/HS-8xxx/HSB-9xxx, Savöx a Futaba). Made of aluminium, with M3 threads for ball links. Distance between servo shaft and M3 hole: 25mm. |
 | KAV20.3915 Name: Carbon control horn 110 x 31mm Price: 6,21€ Delivery status: in stock at supplier Two-arm universal arc carbon lever for servos 110x31 mm, center hole 9 mm. For screwing onto standard plastic servo blades. |
 | KAV20.3911 Name: Carbon control horn 110 x 22mm Price: 4,13€ Delivery status: in stock at supplier Two-arm universal carbon lever for servos 110x22 mm, center hole 8 mm. For screwing onto standard plastic servo blades. |
 | KAV20.3913 Name: Páka serva uhlíková jednoramenná 66 x 22,5mm Price: 3,71€ Delivery status: in stock at supplier Jednoramenná univerzální uhlíková páka pro serva 66x22.5 mm, středový otvor 7 mm. Pro našroubování na standardní plastové kotouče serv. |
 | KAV20.3914 Name: Carbon control horn 40x21mm Price: 2,88€ Delivery status: in stock at supplier Single arm universal carbon servo lever 40x21 mm, center hole 9 mm. For screwing onto standard plastic servo blades. |
 | KAV20.3916 Name: Carbon control horn 53 x 20 Price: 2,88€ Delivery status: in stock at supplier Single arm universal arc carbon lever for servos 53x20 mm, center hole 9 mm. For screwing onto standard plastic servo blades. |
 | KAV20.3912 Name: Carbon control horn 60 x 22,5mm Price: 2,88€ Delivery status: in stock at supplier Two-arm universal carbon lever for servos 60x22.5 mm, center hole 7 mm. For screwing onto standard plastic servo blades. |
 | KAV20.3700 Name: Servoscrew M3x6 10pcs Price: 2,46€ Delivery status: contact us Screw for screwing into standard servo with metal gears to fix the lever. Hexagon socket head, black. The package is 10pcs. |
Spare parts
Equipments required for models
 | 02043DLARF Name: Ventus 2cx De-luxe 4500 mm Price: 1100,00€ (recommended quantity: 2 pieces) Delivery status: in stock Class glider designed to 1:4 scale. Wingspan 4,5 m. Notice: 4,8V for: 1x tow hook, 1x retract gear |
 | 02099DLARF Name: Swift S1 De-luxe 3730 mm Price: 1086,00€ (recommended quantity: 2 pieces) Delivery status: in stock Semi-scale aerobatic sailplane. Wingspan 3,73m. Notice: 4,8V for: 1x tow hook, 1x retract gear |
 | 02057DLARF Name: Discus 2c De-luxe 4500 mm Price: 1028,00€ (recommended quantity: 2 pieces) Delivery status: in stock Class glider designed to 1:4 scale. Wingspan 4,5 m. Notice: 4,8V for: 1x tow hook, 1x retract gear |
 | 02074DLARF Name: Swift S1 De-luxe 3140 mm Price: 1028,00€ (recommended quantity: 2 pieces) Delivery status: in stock Scale sailplane. Wingspan 3,14 m. Notice: 4,8V for: 1x tow hook, 1x retract gear |
 | 02074DLJARF Name: Swift S1 De-luxe 3140 mm (JEPPESEN design) Price: 1028,00€ (recommended quantity: 2 pieces) Delivery status: in stock Scale sailplane. Wingspan 3,14 m. Notice: 4,8V for: 1x tow hook, 1x retract gear |
 | 02020DLARF Name: Discus 2a De-luxe 3750 mm Price: 965,00€ (recommended quantity: 2 pieces) Delivery status: in stock Class glider designed to 1:4 scale. Wingspan 3.75 m. Notice: 4,8V for: 1x tow hook, 1x for retract gear |
 | 02099ARF Name: Swift S1 Standard 3730 mm Price: 859,00€ (recommended quantity: 2 pieces) Delivery status: in stock Semi-scale sailplane. Wingspan 3,73 m. Notice: 4,8V for: 1x retract landing gear, 1x tow hook |
 | 02099ARC Name: Swift S1 Standard 3730 mm (uncovered kit - ready to cover) Price: 804,00€ (recommended quantity: 2 pieces) Delivery status: 1 week Semi-scale sailplane. Wingspan 3,73 m. Uncovered kit - ready to cover Notice: 4,8V for: 1x tow hook, 1x retract gear |
 | 02074ARF Name: Swift S1 Standard 3140 mm Price: 778,00€ (recommended quantity: 2 pieces) Delivery status: in stock Scale sailplane. Wingspan 3,14 m. Notice: 4,8V for: 1x retract landing gear, 1x tow hook |
 | 02074JARF Name: Swift S1 Standard 3140 mm (JEPPESEN design) Price: 778,00€ (recommended quantity: 2 pieces) Delivery status: in stock Scale sailplane. Wingspan 3,14 m. Notice: 4,8V for: 1x retract landing gear, 1x tow hook |
 | 02043ARF Name: Ventus 2cx Standard 4500 mm Price: 777,00€ (recommended quantity: 2 pieces) Delivery status: in stock Class glider designed to 1:4 scale. Wingspan 4,5 m. Notice: 4,8V for: 1x tow hook, 1x retract gear |
 | 02057ARF Name: Discus 2c Standard 4500 mm Price: 751,00€ (recommended quantity: 2 pieces) Delivery status: in stock Class glider designed to 1:4 scale. Wingspan 4,5 m. Notice: 4,8V for: 1x tow hook, 1x retract gear |
 | 02020ARF Name: Discus 2a Standard 3750 mm Price: 729,00€ (recommended quantity: 2 pieces) Delivery status: in stock Class glider designed to 1:4 scale. Wingspan 3.75 m. Notice: 4,8V for: 1x tow hook, 1x retract gear |
 | 02074ARC Name: Swift S1 Standard 3140 mm (uncovered kit - ready to cover) Price: 726,00€ (recommended quantity: 2 pieces) Delivery status: 1 week Scale sailplane. Wingspan 3,14 m. Uncovered kit - ready to cover. Notice: 4,8V for: 1x retract landing gear, 1x tow hook |
 | 02043ARC Name: Ventus 2cx Standard 4500 mm (uncovered kit - ready to cover) Price: 716,00€ (recommended quantity: 2 pieces) Delivery status: 1 week Class glider designed to 1:4 scale. Wingspan 4,5 m. Uncovered kit - ready to cover Notice: 4,8V for: 1x tow hook, 1x retract gear |
 | 02026ARF Name: Aggressor Price: 699,00€ (recommended quantity: 3 pieces) Delivery status: 1 week Artistic - aerobatics. Wingspan 1.99 m. Notice: 4,8V pro: 2x ailerons, 1x rudder |
 | 02057ARC Name: Discus 2c Standard 4500 mm (uncovered kit - ready to cover) Price: 660,00€ (recommended quantity: 2 pieces) Delivery status: 1 week Class glider designed to 1:4 scale. Wingspan 4,5 m. Uncovered kit - ready to cover Notice: 4,8V for: 1x tow hook, 1x retract gear |
 | 02020ARC Name: Discus 2a Standard 3750 mm (uncovered kit - ready to cover) Price: 642,00€ (recommended quantity: 2 pieces) Delivery status: 1 week Class glider designed to 1:4 scale. Wingspan 3.75 m. Uncovered kit - ready to cover. Notice: 4,8V for: 1x tow hook, 1x retract gear |
 | 02026ARC Name: Aggressor (uncovered kit - ready to cover) Price: 550,00€ (recommended quantity: 3 pieces) Delivery status: 1 week Artistic - aerobatics. Wingspan 1.99 m. Notice: 4,8V pro: 2x ailerons, 1x rudder |
 | 02016ARF Name: CAP 222 Price: 549,00€ (recommended quantity: 4 pieces) Delivery status: 1 week Scale model for aerobatics. Wingspan 1.94 m Notice: 4,8V for: 2x ailerons, 1x elevator, 1x rudder |
 | 02067HARF Name: Giles 202 Design HONDA Price: 549,00€ (recommended quantity: 4 pieces) Delivery status: in stock Scale model for aerobatics. Wingspan 1.94 m Notice: 4,8V for: 2x ailerons, 1x elevator, 1x rudder |
 | 02016ARC Name: CAP 222 (uncovered kit - ready to cover) Price: 469,00€ (recommended quantity: 4 pieces) Delivery status: 1 week Scale model for aerobatics. Wingspan 1.94 m Notice: 4,8V for: 2x ailerons, 1x elevator, 1x rudder |
 | 02030ARF Name: Rebelove Acro Price: 377,00€ (recommended quantity: 4 pieces) Delivery status: in stock Aerobatic plane for electric or gas power! Wingspan 1.74 m. Notice: For: 2x Aileron, 1x elevator, 1x rudder |
 | 02029ARF Name: Rebelove 3D Price: 370,00€ (recommended quantity: 4 pieces) Delivery status: in stock 3D gas or electric power! Wingspan 1.56 m. Notice: For: 2x aileron, 1x elevator, 1x rudder |
 | 02030ARC Name: Rebelove Acro (uncovered kit - ready to cover) Price: 284,00€ (recommended quantity: 4 pieces) Delivery status: in stock Aerobatic plane for electric or gas power! Wingspan 1.74 m. Notice: For: 2x Aileron, 1x elevator, 1x rudder |
 | 02029ARC Name: Rebelove 3D (uncovered kit - ready to cover) Price: 278,00€ (recommended quantity: 4 pieces) Delivery status: in stock 3D gas or electric power! Wingspan 1.56 m. Notice: For: 2x aileron, 1x elevator, 1x rudder |