The HS-475HB servo is one of the best deals going. With 76 oz-in. of power, ball bearings, one piece circuit board and Karbonite gears, all for under $18. Although it is only $18, we use this servo for all types of aircraft applications because we have come to know its performance and durability extremely well.

 

$17.99 each

 

Control System: +Pulse Width Control 1500usec Neutral
Required Pulse: 3-5 Volt Peak to Peak Square Wave
Operating Voltage: 4.8-6.0 Volts
Operating Temperature Range: -20 to +60 Degree C
Operating Speed (4.8V): 0.23sec/60° at no load
Operating Speed (6.0V): 0.18sec/60° at no load
Stall Torque (4.8V): 61 oz/in. (4.3kg.cm)
Stall Torque (6.0V): 76 oz/in. (5.5kg.cm)
Operating Angle: 45 Deg. one side pulse traveling 400usec
360 Modifiable: Yes
Direction: Clockwise/Pulse Traveling 1500 to 1900usec
Current Drain (4.8V): 8mA/idle and 150mA no load operating
Current Drain (6.0V): 8.8mA/idle and 180mA no load operating
Dead Band Width: 8usec
Motor Type: 3 Pole Ferrite Motor
Potentiometer Drive: Indirect Drive
Bearing Type: Top Ball Bearing, Lower Bushing
Gear Type: Karbonite Gears
Connector Wire Length: 11.81" (300mm)
Dimensions: 1.50" x 0.8"x 1.4" (41 x 20 x 37mm)
Weight: 1.4oz (39g)