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The HS-325HB Standard Heavy Duty Servo features a ball bearing output shaft for long life and positive centering. Hitec’s HS-325HB is offered with Karbonite™ gears, that after hundreds of thousands of cycles won’t show any signs of wear. With 49 oz./in. of torque at 6 Volts, the HS-325HB is a great choice for Sport pilots all over the World!
*See Karbonite guidelines below
Features
Applications: Heli's and Aircraft up to 72” or up to 12lbs when using just one servo per control surface.
Note: Be aware that high vibration gas (not glow) engines combined with large contol surfaces and large thows (3D models) can put undue strain on the gears. Metal geared servos are recommended for these applications even if under 12lbs.
Warning: Do not use thread lockers on Karbonite geared servo as it will cause the output shaft to fail.
Specifications
Motor Type: 3 Pole
Bearing Type: Top Ball Bearing
Speed (4.8V/6.0V): 0.19 / 0.15 sec @ 60 deg.
Torque oz./in. (4.8V/6.0V): 42 / 51
Torque kg./cm. (4.8V/6.0V): 3.0 / 3.7
Size in Inches: 1.57 x 0.78 x 1.43
Size in Millimeters: 39.88 x 19.81 x 36.32
Weight ounces: 1.51
Weight grams: 42.81
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. |
 | 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
 | 1HI5057 Name: 5003 převody HS-322HD/325HB Karbonite Price: 6,63€ Delivery status: in stock |
 | 1HI6105 Name: 5403 Krabička HS-311,322/325BB/322HD/325HB Price: 4,54€ Delivery status: contact us |
 | 1HI7145 Name: 6317 Sada pák a monttáž. příslušenství stand. serv HS-225/300/303/422/525/545/605/625/645 Price: 4,13€ Delivery status: in stock at supplier |
 | 1HI7130 Name: 6336 Sada montážního příslušenství stand. serv HS-225/300/303/422/525/545/605/625/645/925/ Price: 2,88€ Delivery status: in stock at supplier |
 | 1HI7124 Name: 6402 Páka velká čtyřramenná (2ks) Price: 2,88€ Delivery status: in stock at supplier |
 | 1HI7170 Name: 8471 Ložisko standardního serva Price: 2,46€ Delivery status: contact us |
Equipments required for models
 | 02019rARF Name: Cap 232 Reebok Price: 749,00€ Delivery status: in stock Scale model for aerobatics. Wingspan 2.07 m Notice: 1x for motor |
 | 02019sARF Name: CAP 232 Subaru Price: 719,00€ Delivery status: in stock Scale model for aerobatics. Wingspan 2.07 m. Notice: 1x for motor |
 | 02019ARC Name: CAP 232 (uncovered kit - ready to cover) Price: 566,00€ Delivery status: 1 week Scale model for aerobatics. Wingspan 2.07 m Notice: 1x for motor |
 | 02030ARF Name: Rebelove Acro Price: 377,00€ Delivery status: in stock Aerobatic plane for electric or gas power! Wingspan 1.74 m. Notice: for throttle rod (necessary only for use with combustion engine) |
 | 02029ARF Name: Rebelove 3D Price: 370,00€ Delivery status: in stock 3D gas or electric power! Wingspan 1.56 m. Notice: for throttle rod (necessary only for use with combustion engine) |
 | 020127ARF Name: Antic Price: 303,00€ (recommended quantity: 2 pieces) Delivery status: in stock The recreational model commemorating the beginning of aviation. Electric power. Wingspan 1,6m. Covered with Oracover foil. Notice: for elevator and rudder |
 | 020135ARF Name: Stick 1,6m Price: 303,00€ (recommended quantity: 2 pieces) Delivery status: in stock The recreational model commemorating the beginning of aviation. Electric power. Wingspan 1,6m. Covered with Oracover foil. Notice: for elevator and rudder |
 | 02030ARC Name: Rebelove Acro (uncovered kit - ready to cover) Price: 284,00€ Delivery status: in stock Aerobatic plane for electric or gas power! Wingspan 1.74 m. Notice: for throttle rod (necessary only for use with combustion engine) |
 | 02029ARC Name: Rebelove 3D (uncovered kit - ready to cover) Price: 278,00€ Delivery status: in stock 3D gas or electric power! Wingspan 1.56 m. Notice: for throttle rod (necessary only for use with combustion engine) |
 | 020127ARC Name: Antic (uncovered kit - ready to cover) Price: 217,00€ (recommended quantity: 2 pieces) Delivery status: in stock The recreational model commemorating the beginning of aviation. Electric power. Wingspan 1,6m. Notice: for elevator and rudder |
 | 020135ARC Name: Stick 1,6m (uncovered kit - ready to cover) Price: 217,00€ (recommended quantity: 2 pieces) Delivery status: in stock The recreational model commemorating the beginning of aviation. Electric power. Wingspan 1,6m. Without covering. Notice: for elevator and rudder |