View Poll Results: Do you cut rotors when you are replacing pads?
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POLL: Cutting Rotors
Thread Starter
TECH Apprentice
Joined: Dec 2004
Posts: 328
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From: Downers Grove, IL
POLL: Cutting Rotors ok, say you are replacing pads but not the rotors...what do you pratice, cut them always, cut them only if there is warping or visible wear or never cut them?
Originally Posted by PureWS6
ok, say you are replacing pads but not the rotors...what do you pratice, cut them always, cut them only if there is warping or visible wear or never cut them?
TECH Fanatic
Joined: Mar 2004
Posts: 1,017
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From: Laguna Niguel, CA
I warp/ruin a set of rotors with one set of pads (Hawk HPS). I just buy a new set $30 Autozone rotors each time I change the brakes.
I don't like having turned rotors at all because of the lack of material and ease of warping with less metal to absorb the heat...
I don't like having turned rotors at all because of the lack of material and ease of warping with less metal to absorb the heat...
watch out where you get them cut. i worked at an auto parts store for a while and found out that most stores do not know how to cut rotors. even the store managers can put a set of rotors on the machine and you can watch the rotor wobble while they cut it.
always get them cut. if you road race, youll probably warp them anyway. if its a daily driver, then always cut when you do pads. i worked for a parts store with a machine shop, and they knew how to use the tools. theyll let you know if you need new rotors yet. as long as you get them cut by someone who knows what theyre doing (not billy bobs shadetree repair shop) cutting them is fine, safe, and economical (depending on your shop)
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I used a set of the Hawk HPS pads, as well. My rotors warped ... only time I ever have them turned is if the front is a little wobbly at high braking speeds from warping/overheating; otherwise, I never have mine turned.
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If I'm working on my Camaro or my truck which are both used hard, I machine the rotors. On my wifes Volvo or any car that falls into the beater class, I just measure the rotors to make sure they aren't too thin and throw pads on.
Re'
Re'
I like to replace the rotors. It just seems to me that once they get turned they they get screwed up alot quicker, and you just end up replacing them anyway. Unless you use expensive rotors, why not replace them while you have it apart?
For regular street use it is unnecessary to resurface rotors unless you have lateral runout that is out of spec (ie "warpage"). If indeed you do have lateral runout/pulsation problems your best bet is simply to buy a new set of quality replacement rotors like Brembo blanks, ACDelco Durastops, etc.
Originally Posted by gun5l1ng3r
I warp/ruin a set of rotors with one set of pads (Hawk HPS). I just buy a new set $30 Autozone rotors each time I change the brakes.
TECH Regular
Joined: Nov 2005
Posts: 457
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From: Boston, MA
Originally Posted by 1BadAction
even tho they are brand new, 99% of the time those are warped right out of the box. maybe thats why you think they are warped with one set of pads, cause they were crooked as a georgia politician to begin with. LOL.
AutoZone rotor may be cheap, but they are pretty warp resistant in my exp.
