SSW-110 Reaction Wheel
SSTL (Surrey Satellite Technology)
Flight-proven low Earth orbit reaction wheel with fully integrated electronics, flown on 40+ missions.
Technical specifications
- Design life
- 7.5 years (>5 billion revolutions)
- Angular momentum
- 1.5 Nms
- Max speed
- ±5000 rpm
- Speed accuracy
- <0.1 rpm rms (~300 rpm)
- Max torque
- 0.011 N.m
- Operating temperature
- -20 to +50 degC
- Survival temperature
- -30 to +60 degC
- Radiation (TID)
- <5 krad at wheel electronics
- Mass
- 2.6 kg
- Volume
- Diameter 128 x 124 mm
- Moment of inertia
- 0.0028 kg.m2
- Power standby (20C)
- ~1.2 W
- Power at 5000 rpm (20C)
- ~10 W
- Power at maximum torque (20C)
- ~113 W
- Supply voltage
- 24.1-35 V DC
- Data interface
- CAN BUS or RS422 Full Duplex
About
The SSTL SSW-110 reaction wheel has been used on numerous SSTL missions since 2014 and has also been purchased by external customers for their own spacecraft, with more than 40 flight units in orbit. It offers fully integrated electronics, a hermetically sealed mechanism, and both current and speed control modes, with a single connector for communications and power, regenerated power return to the spacecraft bus, and CAN bus or RS422 communications. Two model variants are available: SSW-110-OLX-1500 (oil lubricated steel bearings) and SSW-110-NLX-1500 (oil lubricated hybrid ceramic bearings).
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.
