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Drilled rotors are produced in many different ways. The process to make a fine quality rotor is substantially different than what is used to make a poor quality specimen, and examples of each will be presented in this article.
Even though there are many different patterns of drilled brake rotors, what is important to focus on is the drill hole integrity. A ceramic drilled brake rotor can actually be cast at the factory as to eliminate drilling imperfections, but drilled rotor designs can still be created properly after casting with fine tools in cast iron as well.
Any imperfections in a brake rotor is subject to cracking when the brake rotor heats up and cools, so these drilled holes at the very least must be created with precision when added post-casting. When a brake rotor is...
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