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slotterd & cross drilled rotors 

 

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 Post subject: slotterd & cross drilled rotors
Posted: Wed Oct 05, 2011 9:54 pm 
Smokin em up
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hay guys i got a set of new rotors for my car but the drill hols dont go all the way through just
wondering are they ment to and if i drill the hols out will it help in any way or just wreck them
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 Post subject: Re: slotterd & cross drilled rotors
Posted: Wed Oct 05, 2011 9:58 pm 
Getting Side Ways
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thats called dimpled holes mate
your better off with dimpled as true drilled will more likely to warp the rotor

 

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 Post subject: Re: slotterd & cross drilled rotors
Posted: Thu Oct 06, 2011 4:07 pm 
Getting Side Ways
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Dimpled as mentioned, they still work fine. Drilling them out would almost certainly lead to cracking/hairline fractures. Cross drilled rotors have holes drilled at angles through the plane of the disc making it less likely to, although still susceptible to cracks.

They're just there to stop a cushion of heat/gas forming between the pad and rotor. A few people actually recommend not using cross drilled rotors for street use.

 

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 Post subject: Re: slotterd & cross drilled rotors
Posted: Thu Oct 06, 2011 5:52 pm 
Getting Side Ways
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Drilled rotors make good paper weights.

 

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 Post subject: Re: slotterd & cross drilled rotors
Posted: Thu Oct 06, 2011 10:49 pm 
Getting Side Ways
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ive got dimpled and slotted from RDA and they are fine

and v8 supercars use just heavily slotted rotors and they would have to be good for them as they glow at times

 

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