homemade rotors?
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Originally Posted by willwren
Sure, but you better do it on an endmill with a rotary indexer, or you're going to have a sever balance issue, too.
Here in KenTUCKy all yous need is sum kentucky fire water,sum duck-tape, a front yard full of cars, and grampy'* old winchester!
(do NOT take that seriously! [/disclaimer] )
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From: Georgia
Originally Posted by willwren
Wire EDM is the preferred method of drilling or machining hardened materials, particularly when you get to the RC 58-60 range or harder in steels. However.......
Then you know all about stress cracks in hardened materials. You weaken the rotor by drilling after hardening, and even somewhat STILL if you drill before hardening. The holes need to be CAST into the blanks to prevent stress cracks (before hardening) to be suitable fore everyday street use, and still provide no real benefit to you other than looks, and decreasing the surface area 'bite' that the pads can achieve. Crossdrilling will in effect REDUCE your ability to brake.
Slotting, however, has proven benefits, and doesn't cause the stresscracking problem. Slots allow the pad to outgas, preventing a gas layer from being trapped in between the pad and rotor (imagine an air hockey table.....same effect). Slotting also allows water to escape, further improving wet braking, and allows pad friction material to be effectively removed from the rotor.
Then you know all about stress cracks in hardened materials. You weaken the rotor by drilling after hardening, and even somewhat STILL if you drill before hardening. The holes need to be CAST into the blanks to prevent stress cracks (before hardening) to be suitable fore everyday street use, and still provide no real benefit to you other than looks, and decreasing the surface area 'bite' that the pads can achieve. Crossdrilling will in effect REDUCE your ability to brake.
Slotting, however, has proven benefits, and doesn't cause the stresscracking problem. Slots allow the pad to outgas, preventing a gas layer from being trapped in between the pad and rotor (imagine an air hockey table.....same effect). Slotting also allows water to escape, further improving wet braking, and allows pad friction material to be effectively removed from the rotor.
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From: Montréal, QC
Re: homemade rotors?
Originally Posted by GAMEOVER
can you make your own crossdrilled rotors? and slot them?
Originally Posted by willwren
No, and no.
Cheers,
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Slotting, yes. If you have the proper tools. Drilling? I still say no. Slotting won't cause stress fractures like drilling will. You have to get into the physics of it.
Yes, you can drill your own rotors, but they won't be rotors any more. They'll be scrap metal.
So no, you can't drill your rotors. You can drill what you don't intend to use as rotors any more!
Yes, you can drill your own rotors, but they won't be rotors any more. They'll be scrap metal.
So no, you can't drill your rotors. You can drill what you don't intend to use as rotors any more!
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From: Montréal, QC
I'm not a fan of cross drilled rotors...and it'* really not worth doing the slotting yourself as opposed to buying them slotted...unless you just like to play around 
Cheers,
Cheers,
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From: Racine Wi
Originally Posted by Foghorn
I'm not a fan of cross drilled rotors...and it'* really not worth doing the slotting yourself as opposed to buying them slotted...unless you just like to play around
Cheers,
Cheers,
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From: Fargo, ND
Did these guys have a little too much fun with the drill??
http://cgi.ebay.com/ebaymotors/ws/eB...category=33564
would these be bad even if they were drilled then hardened?
http://cgi.ebay.com/ebaymotors/ws/eB...category=33564
would these be bad even if they were drilled then hardened?