For more than four decades, SMC (Structure Mechanics Corporation) has engineered high-performance racing clutches that combine advanced computer simulation with precision American manufacturing. Every SMC product is designed using cutting-edge finite element analysis (FEA) and produced in the USA on modern CNC machining centers—delivering race-proven durability, consistency, and performance.
Engineering Roots. Racing Results.
SMC was founded in 1983 when Thomas Fehring, a Senior Mechanical Engineer at Emerson Electric, launched a consulting firm focused on advanced computational analysis. At the time, FEA was a breakthrough technology—allowing engineers to accurately predict vibration, stress, and thermal behavior before a single part was built.
Demand came quickly. High-profile industries sought SMC’s expertise for complex mechanical challenges, including:
-
-
-
- Spy satellite components
- Surgical instruments
- Automotive braking systems
- Jet engine accessories
- Dynamometers and industrial machinery
-
-
With no advertising—only word of mouth—SMC expanded rapidly, adding engineers and building a reputation for solving problems others could not.
From Research to Manufacturing Leadership
In 1989, SMC transitioned from advanced research to full-scale design and manufacturing—bringing aerospace-level analysis directly into small-engine racing applications.
Since then, SMC has produced:
-
-
-
- 4,000+ axle clutches
- Tens of thousands of engine clutches
- Hundreds of thousands of clutch sprockets
- Products sold on five continents
-
-
SMC clutches have powered winners in:
-
-
-
- Enduro karting
- Sprint karting
- Dirt kart racing
- Snowmobiles
- Mini-bikes
- Lawn mower racing
- High-mileage endurance vehicles
-
-
Proven Technology. Measurable Advantage.
With six utility patents and decades of applied engineering experience, SMC designs clutches that deliver:
-
-
-
- Superior torque control
- Reduced heat and wear
- Maximum durability
- Lower total operating cost
-
-
Our philosophy is simple:
Go Faster. Spend Less.
SMC continues to lead the small-engine racing clutch market by combining deep engineering expertise, innovative design, and uncompromising American manufacturing.