KST MS589 Servo – 9.2Kg.cm 0.08s 38.0g 15mm

The new KST MS589 is a very powerful high voltage contactless servo suitable for helicopter cyclic and all fixed wing aplications. At 15 mm thick and 38 g weight it is reasonably small and light, considering its excellent 9.2 kg.cm of torque and 0.08 sec/60° speed.

The MS589 uses a Hall effect (magnetic) positon sensor for maximum acuracy and reliability. Also see the KST D589MG servo which is the same size but uses a potentiometer as a position sensor.

The KST MS589 a similar size and torque as the well regared MKS HV737 and is faster and better value.

Despite not having an -MG moniker the KST MS589 servo has a hardened steel metal gear train.

KST MS589 Servo Specifications
Body dimensions	35.5 mm wide x 15.0 mm thick x 32.5 mm high	1.40″ wide x 0.59″ thick x 1.28″ high
Max dimensions	47.0 mm wide x 15.0 mm thick x 39.0 mm high	1.85″ wide x 0.59″ thick x 1.54″ high
Stall torque (6V)	6.5 Kg.cm	90 oz.in
Stall torque (7.4V)	8 Kg.cm	111 oz.in
Stall torque (8.4V)	9.2 Kg.cm	128 oz.in
Weight	38 g	1.34 oz
Lead length	21 cm	8.3 in
Operating speed (6V)	0.1 sec/60°
Operating speed (7.4V)	0.09 sec/60°
Operating speed (8.4V)	0.08 sec/60°
Operating voltage	6V to 8.4V
Operating temperature	-20 to 60 °C
Bearings	2 Ball bearings
Gear material	Hardened steel
Case material	Aluminium alloy
Motor type	Coreless
Working frequency	333 Hz
Dead band/resolution	2 µs
Pulse width for ± 60º	1000-2200 µs
Digital	Yes
Programmable	No
Position feedback	Hall effect (magnetic)
Supplied accessories	4 plastic output arms, 2 arm retaining screws, 4 mouning screws, 4 rubber gromets
Optional accessories