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KST X08H Plus Servo - 0.09s 9.0g 8mm

Product Code: KST-X08H-PLUS
 (13 reviews)

Price: $49.05

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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 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 Servo Specifications
Body dimensions 23.5 mm wide x 8.0 mm thick x 16.8 mm high 0.93" wide x 0.31" thick x 0.66" 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 (3.8V) 2.4 33
Stall torque (6V) 3.9 54
Stall torque (8.4V) 5.3 74
Weight 9 g 0.32 oz
Lead length 10 cm 3.9 in
Operating speed (3.8V) 0.18 sec/60°
Operating speed (6V) 0.15 sec/60°
Operating speed (8.4V) 0.09 sec/60°
Operating voltage 3.8V to 8.4V
Operating temperature -20 to 65 °C
Bearings 2 Ball bearings
Gear material Aluminium alloy / copper-bronze alloy
Case material Aluminium alloy
Motor type Coreless DC motor
Working frequency 333 Hz
Dead band/resolution 2 µs
Pulse width for ± 60º 1000-2000 µs
Digital Yes
Programmable No
Position feedback Potentiometer
Supplied accessories 3 plastic output arms, 1 arm retaining screw, 4 mounting screws
Optional accessories Ply Frame for KST X08, Pulley For KST X08, KST X08 Servo Arm Set, Frame with plain bearing for the KST X08, Integrated Drive System/Mono for KST X08

Reviews 13  

 Review by:

A very good choice for elevator servo on most modern sailplanes including scale. Size and torque have hit the sweet sport for this application specifically.

 Review by:


Excellent service and awsome servos fitted the magnus slope soarer perfectly...was recommended by hyperflight..thanks again

 Review by:

Ideal replacement servos for identical ones which had died suddenly. First rate service from the hyperflight team.

 Review by:


Ideal servos for thin wings with limited space.

 Review by:

Good price, fast shipping. Thank you!

 Review by:

Great 8mm servos. Use them in all our slopers here on the California coast. Don't like the small can and two thin wires hanging out. But no longer an issue as the new version of the Xo8 is the HS08 A for wings where the above mentioned can is enclosed in the servo body. If you have not tried these, give them a go. Rock solid in your hands and in the air!

 Review by:

Very good servo

Quality servo for my purpose.

 Review by:

KTS x08 servos

I have just bought 6 of these servos plus servo mounts. The service was first rate and although I made a mistake when ordering it was rectified very quickly. Overall a great service.

 Review by:

KST X08H Plus Horizontal Lug Servo - 0.09

The best servo for montage in wings on gliders

 Review by:

KST X08H Plus Horizontal Lug Servo -

Great service and great servo on ailerons in my Stormbird

 Review by:

Servo KST X08H Plus

The servo is a lightweight micro powerful high precision servo. I use this servo i my gliders and is the best servo i can buy.

 Review by:

Хорошее сочетание " цена-качество ".

 Review by:

KST X08H Plus Horizontal Lug Servo - 0.0

I have used the standard sized XO8 servos without problems. This new "Plus" servo has almost twice the power without being much larger. When they work, they work very well with minimal (but not zero) backlash in the gears.

However, I have had 50% failure rates in these servos. The failure is in the electronics, which suddenly fail to respond at all. The cause of the problem is unclear.

Fortunately, the failures occurred while the servos were being used on the flaps, so the failure did not result in the loss of the aircraft. Due to my experience, I would recommend that you avoid using these servos on critical controls like the elevator where reliability is essential.

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