Double Drilled Rotors
What Is Double Drilling?
Double drilling refers to two rows of precision holes drilled through the rotor face, staggered radially to maximize coverage without weakening the rotor structure. Each hole passes fully through both faces of the rotor, creating direct airflow channels from one side to the other.
Unlike poorly engineered drilled rotors that can crack around the holes, Ghost Rotors double drilling uses:
- Chamfered edges — each hole is chamfered (beveled) to eliminate stress concentration points that cause cracking
- Optimal hole diameter — sized to maximize airflow without reducing rotor mass below safe limits
- Precise hole placement — positioned between diamond slots to complement the slot pattern
Cooling & Heat Dissipation
As the rotor spins, each drilled hole creates a low-pressure zone that draws cooler air through the rotor face. This accelerated airflow works in addition to the internal vanes between the two rotor faces on vented rotors.
The practical effect is a measurable reduction in rotor operating temperature during hard use — directly reducing:
- Brake fade from pad outgassing
- Thermal stress and the risk of warping
- Heat soak into wheel bearings and hubs
For maximum cooling, the double drilled design works in concert with the 2-piece floating rotor hat, which isolates heat from the hub mounting surface.
Eliminating Brake Dust & Debris
Drilled holes also serve as evacuation ports for fine brake dust and debris that accumulates at the pad-rotor interface. This debris — if allowed to build up — acts as an abrasive that accelerates wear on both the pad and rotor surface.
The combination of drilled holes and diamond slots creates a self-cleaning braking surface. Every braking event sweeps the interface clean, ensuring:
- Fresh rotor surface contact on every stop
- Consistent pad transfer film development
- Reduced glazing risk on carbon ceramic pads
Learn how to properly bed new rotors and pads in our Break-In Procedure Guide.
