Engineered for applications that require additional heat capacity, Tilton’s 7.25″ OT-II heavy duty metallic racing clutches offer the low moment-of-inertia, high torque capacity and reliability necessary for the most demanding racing applications. Four diaphragm spring rate options offer a wide range of torque capacities and release loads to tune the clutch for the application, and the high-mass pressure plate provides additional heat capacity for severe applications.
Applications
- Off-Road
- Endurance
- Drifting
- Other applications that require additional heat capacity
3-Plate Specifications:
Weight**: 10.6 lbs/4.8 kg
M.O.I.**: 94.6 lb-in2/.0278 kg-m2
Spring Color | Torque Capacity
(lb-ft/Nm) | Release Load*
(lbs/daN) |
Orange | 840/1142 | 560/247 |
" | 840/1142 | 560/247 |
Gray | 1020/1387 | 680/299 |
" | 1020/1387 | 680/299 |
Double Gray | 1140/1550 | 760/334 |
" | 1140/1550 | 760/334 |
Triple Gray | 1245/1693 | 800/352 |
" | 1245/1693 | 800/352 |
4-Plate Specifications:
Weight**: 13.0 lbs/5.9 kg
M.O.I.**: 115.9 lb-in2/.0340 kg-m2
Spring Color | Torque Capacity
(lb-ft/Nm) | Release Load*
(lbs/daN) |
Orange | 1120/1314 | 560/247 |
" | 1120/1314 | 560/247 |
Gray | 1360/1850 | 680/299 |
" | 1360/1850 | 680/299 |
Double Gray | 1520/2067 | 760/334 |
" | 1520/2067 | 760/334 |
Triple Gray | 1660/2257 | 800/352 |
" | 1660/2257 | 800/352 |
All 7.25″ heavy duty metallic clutches feature a high-ratio pressure plate.
* Values listed are typical for release bearings with the recommended 44mm contact diameter. Larger contact diameters will increase release load.
** Weight and M.O.I. include pressure plate, carbon floater plates, carbon discs and steel hub, and may vary based on your particular spline.
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 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.
P65 Notice