The KST X12-708 Brushless is a superb new 21g servo from KST. Although originally intended for the heli market the X12-708 is also becoming popular for use in high performance gliders and fast powered aircraft.
The 708's brushless motor allows a more advanced servo control algorithm and eliminates failures due to brush wear, making it immune to vibration.
KST X12-708 Brushless Servo Specifications
Body dimensions
23.0 mm wide x 12.0 mm thick x 27.5 mm high
0.91" wide x 0.47" thick x 1.08" high
Max dimensions
32.0 mm wide x 12.0 mm thick x 31.0 mm high
1.26" wide x 0.47" thick x 1.22" high
Stall torque (6V)
6.3 Kg.cm
87 oz.in
Stall torque (7.4V)
8.6 Kg.cm
119 oz.in
Stall torque (8.4V)
9.3 Kg.cm
129 oz.in
Weight
21.3 g
0.75 oz
Lead length
21 cm
8.3 in
Operating speed (6V)
0.09 sec/60°
Operating speed (7.4V)
0.08 sec/60°
Operating speed (8.4V)
0.07 sec/60°
Operating voltage
6V to 8.4V
Operating temperature
-10 to +60 °C
Bearings
2 ball bearing
Gear material
Hardened steel
Case material
Aluminium alloy
Motor type
Brushless
Working frequency
333 Hz
Dead band/resolution
1 µs
Pulse width for ± 60º
(60°L) 1000 µs - (0°) 1500 µs- (60°R) 2000 µs
Digital
Yes
Programmable
No
Position feedback
Potentiometer
Supplied accessories
2 heavy duty plastic output arms, 3 medium stength arms. 1 arm retaining screw, 4 mouning screws