new rotors or resurface?

[Losiracer2]

On-Car Brake Lathe.

It's the only kind we use to turn rotors on vehicles w/HOR. And you're right...it makes it so quick. Unless the customer needs new rotors to begin with...then you're screwed.

OP never said how bad the condition of his current ones were though. My last brake job, mine were 2mm dished inward, that was the difference between the outer thickness and where the pads sat, so I just bought new ones for 60 bucks a pair at Checkers...they were made in Japan so I figure they were of decent quality compared to the Mexico and China manufactured ones.

On my beater car, I didn't care, I wasn't going to track it hard at all, just used for highway commuting 99% of the time so I put those cheapo value craft ones on. They were exactly 22.99 each and came with a 1 yr warranty so that's good enough.

[firststrike50]

I didnt see where this has been already stated but...
The reason for machining rotors when replacing pads is to get rid of the old pad material that is embedded in the rotors and to allow the the new pad material to embed to the new surface,this will make for less squeaking.

[wed3k]

it hasnt been stated because it was already assumed.

[Keg]

So how tight are the tolerances on new rotors, and what should they be?

[1991redcoupe]

the rotors are warped....not to bad but it does vibrate when I slow down from say 60 or brake kinda hard.....i have decided to go with new ones since its only about 25 dollars more.....thank for all the great ideas....matt

[firststrike50]

it hasnt been stated because it was already assumed.

Oh,sorry.I saw several people ask why the rotors need to be turned at all and I thought Id answer their question....good day