turning a cross drilled and slotted rotor

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Thread: turning a cross drilled and slotted rotor

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    Default turning a cross drilled and slotted rotor

    need a quick answer.. hope someone see this. anyone had to turn these type of rotors yet??? i have been getting a vibration.... not the shimmy/vibration from the factory set... but this resonating on the brake pedal. so i was in to replace my o2 sensors and going to have the shop put back on factory toyota pads, and turn the rotors. they say they can turn slotted and cross drilled rotors because it will tear up thier brake lathe.

    they call 3 other shops... they all claim the same thing.

    im having them do the pads... but hope there is something i can tell them about rotors.

    similar post under the sp and rotor group buy.. but hoping for some quick responses so i can get this thing done today

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    Default Turning Slotted/Drilled Rotors

    I looked into this a couple weeks ago and was unable to find anyone that could even measure the runout of a slotted/cross drilled rotor. I know that it is possible though.

    I didn't check any of the dealerships that sell cars (Ferrari, Mercedes, Jaguar, etc) that come with these types of rotors though. These and independent shops that service these types of vehicles may be your best bet.

    If you find a place that can do this, that would be good to know.

    Sorry I can't be of more help.


    Paul
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    Quote Originally Posted by Picasso
    I looked into this a couple weeks ago and was unable to find anyone that could even measure the runout of a slotted/cross drilled rotor. I know that it is possible though.

    I didn't check any of the dealerships that sell cars (Ferrari, Mercedes, Jaguar, etc) that come with these types of rotors though. These and independent shops that service these types of vehicles may be your best bet.

    If you find a place that can do this, that would be good to know.

    Sorry I can't be of more help.


    Paul
    wow.. i just spoke to a local performance shop. he said basically noone will try to turn a slotted rotor. he races and said that they can basically get rid of the "out of round" by some very "spirited" driving yee haa!

    he suggested i go to one of the local runways... and do some "spirited" driving. he thought i may be able to get them feeling better again. he said that after hard braking... and coming to a stop... let the truck creep. i thought i was pretty good at that.... guess not good enough

    i didnt realize i was buying disposable brake rotors... i though i was getting something that would last a long long time. thats kind of disappointing

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    Quote Originally Posted by chrislloyd
    wow.. i just spoke to a local performance shop. he said basically noone will try to turn a slotted rotor. he races and said that they can basically get rid of the "out of round" by some very "spirited" driving yee haa!

    he suggested i go to one of the local runways... and do some "spirited" driving. he thought i may be able to get them feeling better again. he said that after hard braking... and coming to a stop... let the truck creep. i thought i was pretty good at that.... guess not good enough

    i didnt realize i was buying disposable brake rotors... i though i was getting something that would last a long long time. thats kind of disappointing

    Hey Chris,

    These rotors can be turned. I just had a slotted pair 'trued' while on the 4-Runner. Find a competent brake shop. JB

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    i turned quite a fiew sloted rotors while workin at brake deop, its dooable and it will work fine as long as they are not warped to hell.

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    i have had 4 shops all say they wont do it... it "chews up the tips on the lathe" is the typical response. will putting new pads on slightly out of round rotors mess up the pads?

    i know im not dainty on the brakes... but i really wish i didnt have to deal with warping rotors for the past 5 years

    i thought these rotos were going to fix my problems once and for all

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    that sucks, the tips on the leith i used were so messed up as it was i gues it didint matter. it still cut pretty good tho.

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    Default Curing the Brake Shakes

    Quote Originally Posted by chrislloyd
    i have had 4 shops all say they wont do it... it "chews up the tips on the lathe" is the typical response. will putting new pads on slightly out of round rotors mess up the pads?
    That's the same kind of response that I got a couple weeks ago.

    Quote Originally Posted by chrislloyd
    i know im not dainty on the brakes... but i really wish i didnt have to deal with warping rotors for the past 5 years

    i thought these rotos were going to fix my problems once and for all
    I see that you have had the brake TSB done. Since this clearly didn't resolve the problem, something else is the ultimate cause. Here's a link to another thread in case you haven't already seen it that discusses how to resolve this so that your front brakes stop shaking. Brake Problem In that thread are two links to other threads with more info.

    I know that this doesn't help your immediate issue but it may help you in the long run.

    Good luck.


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    I know very little about brakes but thought this was an interesting article in light of the fact that so many tundra owners seem to have brake problems that are said to be due to warped rotors.

    http://www.stoptech.com/tech_info/wp...rakedisk.shtml

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    Default New Pads on Warped Rotors

    Quote Originally Posted by chrislloyd
    will putting new pads on slightly out of round rotors mess up the pads?
    I just noticed this part of your post but I get the impression that this is now a moot point.

    I don't think you will run into any major problems doing this with warped rotors. Bedding in the new pads could be problematic due to the rotor runout though.

    The trend in this forum has been to stay away from Toyota pads. Just out of curiousity, why did you select them?


    Paul
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    Chris,
    Before joining this forum, I thought I knew a lot about disc brakes, but was really misinformed.

    Before doing anything, please review "The Warped Rotor Myth" at this link:
    http://www.stoptech.com/tech_info/wp...rakedisk.shtml

    From there, you will understand why rotors are "percieved" to be "warped" when really what has happened is that brake pad material has be deposited unevenly on the rotor.

    I read articles indicating that slotted and cross drilled rotors should never be turned, but rather, should be properly sanded with garnet paper to remove the deposits of pad material.

    Good luck.

    Ron

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    I've turned lots of uneven or nicked materials on an industrial lathe with no problem, but brake shop guys are not machinists. I did measure the runout of my new slotted rotors with a dial indicator with no problem...again, brake mechanics don't understand much, just memorize a few things.

    To measure the runout on slotted or drilled rotors, either a big diameter tip needs to be used on the dial indicator, or the tip needs to be lifted over each hole and slot. It really isn't a problem. If you really want the info, you might find a machine shop that does repair work, not production work, and ask one of the machinists to moonlight for you for a few bucks. He could do your measurements some evening or weekend.

    And I agree, sandpaper the rotors with emery cloth, aluminum oxide abrasive cloth, whatever, to remove any deposits of pad material. If they aren't truly warped with excessive runout, they don't need turning.


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    I was informed that you have to turn drilled/slotted rotors on a machine that turns flywheels, dont know how true that is,,,.....

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    okay.. so i put back on toyota pads... mainly because they seem to "fit" better. the brake shop that put on the rotors and pads said they had to shim the pads. then they would make lots of clicking noises and such. i also got a lot of noise while braking... like a whooshing sound. they were also very dusty compared to the toyotas. this all started to happen at about 10k after the upgrade. they reshimmed the pads... but symptoms came back. this is about when the vibration started happening. i just got tired of this.. so i wanted the rotors turned and the toyota pads put back on.

    so now the toyota pads are back on... the vibration is nearly gone. the brakes dont have the firm stopping feel they had with the aftermarket pads, but the smooth braking is great.

    i did not have the rotors turned. i talked to to shop i bought them from... they said it was no different to turn those than any normal rotor.

    im just glad not to have the vibration again

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    Default Re: turning a cross drilled and slotted rotor

    O'reilly's Auto Parts say they can turn drilled rotors. They are turning a pair from my Mercedes S430 right now. I suppose I will know in a couple of hours whether they can really do it or not. I figured it was worth the $30 gamble to try it.


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