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Conceived over 70 years ago for use in automotive transmissions the requirement for SSS Clutches was transformed when Gas Turbines began to be used for Power Generation and Marine Propulsion systems.

SSS Clutch Highlights…

2024 500th CCGT Plant

2023 SSS completes expansion of Sunbury-on-Thames site, doubling factory space to 60,000 sq.ft

2020 2 x 400 MW clutches supplied into Indonesia on our largest CCGT application

2020 Over 1000 cluches supplied into Uninterruptible Power Supply applications worldwide

2012 First of 9 x 300T Encased clutches for CHP applications in Korea

2009 First of 15 Pinion Turning Gear clutches supplied onto Nuclear plants Globally

2007 Largest single order for Synchronous Condenser clutches for Eskom in South Aftrica

2002 US 30th Navy selects SSS Clutches for Marine Propulsion

1999 100th CCGT Plant

1997 800MW generator converted to a Sychronous Condensor in decommissioned nuclear plant

1994 First SSS Pinion Turning Gear clutch with electronic control

The "Fluidrive SSS Transmission" - a semi-automatic automobile gearbox - The Autocar 1956.
Fluidrive SSS Transmission
- click image to enlarge

1989 SSS-Tosi drive selected for US Navy AOE class 48000t ships

1984 First Marine Hybrid Electric Propulsion system using SSS Clutches

1981 Selected for Tosi reversing drive for Italian Navy Helicopter Carrier

1976 First CAES plant built at Huntorf and World's highest power clutch at 290MW

1964 First application in Gas Turbine Generator for Synchronous Condensing

1962 First application for Gas Turbine marine propulsion on Royal Navy HMS Exmouth (F84)

1950 SSS Gears Limited incorporated

1949 Locomotive version for David Brown gearbox

1936 SSS Clutch showcased at London Motor Show

1930 Synchro-Self-Shifting Clutch invented by Norton Legg

The "Enterprise" hauling 1500 tons of coal through an SSS Clutch - 1956.