Tilton has upgraded their popular line of OT-140 5.5” metallic clutches with the addition of lower rate diaphragm spring options. While still providing high torque capacity, the new diaphragm springs significantly reduce release loads compared to other 5.5″ racing clutches on the market. The lower release loads put less stress on engine crankshaft thrust bearings, making these clutches ideal for smaller 4-cylinder and 6-cylinder engines. In addition, a lower release load on the clutch equates to less pedal effort for the driver, allowing for easy shifting. Spring options now include White (W), Orange (ORA) and Gray (G). 5.5″ OT-140 metallic racing clutches are available in 1, 2, 3 and 4-plate configurations.

Tilton’s 5.5″ OT-III metallic racing clutches offer the low moment-of-inertia, high torque capacity and reliability necessary for the most demanding racing applications. These features have made metallic clutches the most common clutch type used in road racing and circle track racing. The included high ratio pressure plate features short release travel for quick engagement and shifting as well as a flat clamp load curve for longer wear range.  5.5″ OT-140 metallic racing clutches are not recommended for street use.

5.5″ OT-140 metallic racing clutches applications include:

• Road Racing
• Circle Track
• Open Wheel
• Formula
• Short Course Off Road

The open, one-piece clutch cover design keeps operating temperatures lower and ensures high strength and minimal deflection for quick shifting. Chrome vanadium diaphragm springs and an engineered pressure plate geometry provide a high clamp load-to-wear ratio, low release load and quick shifting. High-strength steel is used in both the pressure plates and the floater plates. .104″-thick friction disc withstands elevated temperatures while providing low inertia and excellent wear resistance. Hardened steel thrust buttons provide smooth and durable surface for pressure and floater plates. Every Tilton OT clutch is dynamically balanced to ensure the highest level of performance. Each OT clutch is individually inspected for proper assembly and balance, and initialed by the quality personnel as confirmation.