Ø330MM Ventilated Brake Disc
Technical Specifications ('Letter' Relating to Disc Drawing)
Ø330MM x 20.7-25.4mm Thickness
Ø330MM x 26.0-28.0mm Thickness
Ø330MM x 30.0-36.0mm Thickness
Ventilated Brake Disc Schematic Drawing Reference
DISC FACE TYPES
Disc Grooves and sometimes cross-drilling are normally used on all racing brake discs to clean the surface of the pad & allow gases produced to escape. In doing so, the friction characteristics are modified. Different groove & drilling patterns affect the friction characteristics in different ways; some effect overall friction and others the bite or release characteristics & therefore the best solution is not necessarily the same for each application.
The most popular face types are detailed below:
Note: For grooved face types, the number signifies the amount grooves are on the disc face.
- P = Plain (No grooves or holes)
Mainly used on road applications where road noise is vital.
- G4, G8, G12, G24 = Grooved (Straight, forward facing)
Traditional style straight grooves.
- CG4, CG8, CG12, CG24 = Curved Groove (Backward facing)
This is a standard grooved pattern.
- CR4, CR8, CR12, CR24 = Curved Groove (Backward facing running to the edge of the disc diameter)
Ideal for clearing debris from the disc face, only used for thick wall discs.
- D & SD = Cross Drilled
The drilled holes are chamfered with holes spaced across the face of the disc in lines. Still preferred with some pad materials but can compromise the disc life.
- GD = Grooved and Drilled
Usually used on road applications.
- RD = Radius Drilled
The same as cross drilled but with a radiused run out to the edge of the disc, reduced noise and improved life when compared to standard drilling patterns. Mainly used for aesthetic reasons on road applications.
- RA = J-Hook Design
The outer grooves run out to the edge of the disc face, used on thick wall discs only. This pattern gives improved bite and debris clearance, it also reduces distortion/vibration.
- GA = J-Hook Design
Latest J-Hook design. The same as the RA type but the outer groove does not run to the edge of the disc. Improved bite and debris clearance combined with reduced distortion/vibration.
- RC = J-Hook Design
The same as the RA type but has 3 hooks across the disc face. Designed for thick wall discs only.
Note: Not all face types are available for each disc.
