TILTON Engineering 7.25″ OT-II Metallic Racing Clutches 7.25 吋多片式金屬離合器組


Cerametallic-Clutches
66-302_side 66-301_side1 pot-step-margin
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$24,000NT

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Designed primarily for road racing, circle track, open wheel and formula applications, Tilton’s 7.25″ OT-II 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. Metallic clutches are not recommended for street use.

Applications

  • Road Racing
  • Circle Track
  • Open Wheel
  • Formula

Design

Open, one-piece clutch cover design provides lower operating temperature, high strength and minimal deflection for quick shifting.

Engineering

Chrome vanadium diaphragm springs and an engineered pressure plate geometry provide a high clamp load-to-wear ratio, low release load and quick shifting.

Materials

High-strength steel is used in both the pressure plates and the floater plates.

Toughness

.104″-thick friction disc withstands elevated temperatures while providing low inertia and excellent wear resistance.

Operation

Hardened steel thrust buttons provide smooth and durable surface for pressure and floater plates.

Testing

Every Tilton OT clutch is dynamically balanced to ensure the highest level of performance.

Quality Assurance

Each OT clutch is individually inspected for proper assembly and balance, and initialed by the quality personnel as confirmation.

1-Plate Specifications:

  • Weight**: 5.1 lbs/2.3 kg
  • M.O.I.**: 44.1 lb-in2/.0130 kg-m2

2-Plate Specifications:

  • Weight**: 7.5 lbs/3.4 kg
  • M.O.I.**: 66.3 lb-in2/.0195 kg-m2

3-Plate Specifications:

  • Weight**: 9.9 lbs/4.5 kg
  • M.O.I.**: 87.6 lb-in2/.0258 kg-m2

Tilton offers two different styles of every clutch configuration: one designed to be compatible with a step-type flywheel, and another for pot-type (“no-step”) flywheels.

Step flywheels have a .100″ step for contact with the friction material of the clutch, so clutches made for this application will have a .100″ height difference between the bottom friction disc and the end of the clutch cover legs (the mounting points). Pot flywheels don’t have this step, so the friction disc and clutch cover legs will be flush on clutches designed for them.

Tilton’s cerametallic clutches are available with either a High Ratio or Ultra-High Ratio pressure plate. High Ratio pressure plates offer high clamp load over a wide wear range, while Ultra-High Ratio pressure plates provide 20% more clamp load and diaphragm spring travel (modulation). As seen on the graph below, the clamp load (or torque capacity) of the High Ratio pressure plate is relatively flat until .030″ (0.76mm) of wear; Ultra-High Ratio pressure plates offer a higher initial clamp load at a faster wear rate.

High ratio pressure plate:

  • Standard pressure plate ratio for Tilton’s cerametallic clutches
  • Short release travel for quick engagement and shifting
  • Flat clamp load curve for longest wear range

Ultra-High ratio pressure plate:

  • 20% more release travel than High Ratio for improved modulation
  • 20% more clamp load than High Ratio for higher peak torque capacity
  • Clamp load drops more quickly with wear than High Ratio

Tilton uses a color system for indicating the angle and weight of the clutch spring, which has an effect on release load and torque capacity for the clutch. The exact values for each color vary depending on the type of clutch, so be sure to check the Specs tab to find exact measurements.

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