CYS-S8255

The cysmodel CYS-S8255 is an all-metal coreless digital servo for fixed-wing aircraft. It combines titanium gears, dual bearings and a 25T output spline in a 38g±1g body. Operating on 6.0-7.4V with PWM control, it delivers 8.5kg.cm torque at 7.4V.

CYSDrone frame

Dimensions: 38.3*13.5*31.2 mm
Weight: 38g±1g
Operating voltage: 6.0-7.4 V

Product overview

The cysmodel CYS-S8255 is an all-metal digital servo for fixed-wing aircraft, built with a coreless motor, titanium gears and dual bearings. It measures 38.3*13.5*31.2mm and weighs 38g±1g. Its output spline has 25 teeth, and its lead measures 250± 5 mm. The lead uses brown/black for negative, red for positive and orange/white for signal. The servo provides 90° of total angular travel, with 45° of movement on each side.

The CYS-S8255 operates on 6.0-7.4V and accepts PWM control with a 1500usec neutral position and a 2 usec deadband. Operating direction is reverse over a pulse range of 1000usec ~ 2000 usec. At 6.0V, torque is 7.0kg.cm and no-load speed is 0.175sec/60°; at 7.4V, torque is 8.5kg.cm and no-load speed is 0.145sec/60°. Standby current is 3mA at either voltage. No-load current is 100mA at 6.0V and 120mA at 7.4V.

Propellers & airframes

Specifications

Specification	Value & conditions
Model and application	Cysmodel CYS-S8255 all-metal coreless digital servo for fixed-wing aircraft
Type	Digital
Weight	38g±1g
Dimensions	38.313.531.2mm
Control method	PWM signal control; neutral position 1500usec
Operating voltage	6.0-7.4V
No-load speed at 6.0V	0.175sec/60°6.0V; no load.
No-load speed at 7.4V	0.145sec/60°7.4V; no load.
Torque at 6.0V	7.0kg.cm6.0V.
Torque at 7.4V	8.5kg.cm7.4V.
Operating angle	90° total; 45° per side
Operating direction	Reverse; range 1000usec ~ 2000 usecPulse range 1000usec ~ 2000 usec.
Standby/no-load current at 6.0V	3mA/100mA6.0V; standby/no-load respectively.
Standby/no-load current at 7.4V	3mA/120mA7.4V; standby/no-load respectively.
Deadband	2 usec
Motor type	Coreless
Bearing arrangement	Dual bearings
Output spline tooth count	25T
Gear type	Metal
Lead length	250± 5 mm
Torque range	7.0Kg.cm ~ 8.5Kg.cm7.0Kg.cm at 6.0V; 8.5Kg.cm at 7.4V.
Speed range	0.175sec ~ 0.145sec/60 °No load; 0.175sec/60° at 6.0V and 0.145sec/60° at 7.4V.
Voltage range	6.0Volts ~7.4Volts
Construction and gear material	All-metal construction, coreless motor and titanium gears
Lead identification	Negative: brown/black; positive: red; signal: orange/white