KST X08H Plus Digital Servo 8.4V 0.09s 5.3kg.cm 73oz.in


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The KST X08H Plus is a version of the KST X08 Plus servo with horizontal mounting lugs (also called mounting tabs), making it suitable for use in wing and other flying surfaces. The KST X08H Plus is a very light (9.5 g) low/medium/high voltage metal cased servo. It is based on the well regarded KST X08H V5 servo but with a larger motor fitted.

It is especially good for ailerons on F5J gliders, electric racers, and all models with thin flying surfaces. Despite being only 8 mm thick the powerful coreless DC motor and gearing provide good torque and high speed. The X08H Plus can be operated from a voltage as low as 3.8V (1S LiPo) or as high as 8.4V (2S LiPo). KST servos have excellent geartrain machining tolerances, and this servo is completely slop free, and equal to products costing twice as much. Despite not having an -MG moniker this servo has metal gears, and is very tough.

The KST X08H Plus's high torque, good speed, and 8mm thinness make it suitable for many high performance glider, pylon racers and EDF applications. With up to 5.3 kg.cm torque the KST X08 is appropriate for F5J, F5D, F3J and many types of high performance models.

The extreme reliability and performance of these servos also makes them very suitable for use in film and motion picture industry special effect departments. They are also used in robotic, drone, UAV, UAS, academic research, military, and other highly demanding applications.

KST X08H Plus Specifications
Body dimensions 23.5 mm wide x 8.0 mm thick x 17.0 mm high 0.93" wide x 0.31" thick x 0.67" high
Max dimensions 29.5 mm wide x 8.0 mm thick x 31.0 mm high 1.16" wide x 0.31" thick x 1.22" high
Stall torque / Speed @ 3.8V 2.4 kg.cm / 0.18 s/60° 33 oz.in / 0.18 s/60°
Stall torque / Speed @ 6V 3.9 kg.cm / 0.15 s/60° 53 oz.in / 0.15 s/60°
Stall torque / Speed @ 8.4V 5.3 kg.cm / 0.09 s/60° 74 oz.in / 0.09 s/60°
Weight 9.5 g 0.34 oz
Lead length 10 cm 4.0 in
Operating Voltage 3.5V - 8.4V
Bearings 2 ball bearings
Gear material Aluminum alloy / copper-bronze alloy
Case material Aluminum alloy
Motor type Coreless DC motor
Working frequency 333 Hz
Dead band/resolution 2 µs
Pulse width for ± 60º 900 - 2100 µs
Programmable No
Position sensor Potentiometer
Operating temperature -20 to +65 ºC
Supplied accessories 3 plastic output arms, 1 arm retaining screw, 4 mounting screws

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