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Old 06-04-2003, 10:40 AM   #1
NotFast
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Default Okay, what does "turning rotors" mean?

It's been bugging me for awhile. Why is it called "turning"? Because they put the rotor on a lathe and "turn" it while removing a thin layer of metal?

Or is this one of those misnomers? 'Cause, in reality, my rotors turn every time I drive my car. Or maybe I'm "spinning" my rotors when I drive?

Thanks.
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Old 06-04-2003, 10:43 AM   #2
North Ursalia
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Default Re: Okay, what does "turning rotors" mean?

Quote:
Originally posted by NotFast
Because they put the rotor on a lathe and "turn" it while removing a thin layer of metal?
You answered your own question


Brian

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Old 06-04-2003, 12:41 PM   #3
Mean
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Something not known very well is that rotors need to be broken in again after turning them. That is, heat them up with some firm 60-5 mph non-ABS braking exercises and then let them cool. It's not just brake pads that need breaking in.

G
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Old 06-04-2003, 01:19 PM   #4
HndaTch627
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Quote:
Originally posted by Mean
Something not known very well is that rotors need to be broken in again after turning them. That is, heat them up with some firm 60-5 mph non-ABS braking exercises and then let them cool. It's not just brake pads that need breaking in.

G
that's a great way to glaze them on the first use.

drive it normally, no excessively hard breaking, but you don't have to drive it like grandma.

Jeremy
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Old 06-05-2003, 09:09 AM   #5
Mean
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From Stop Tech:

"Typically, a series of ten increasingly hard stops from 60mph to 5 mph with normal acceleration in between should get the job done for a high performance street pad. During pad or disc break-in, do not come to a complete stop, so plan where and when you do this procedure with care and concern for yourself and the safety of others. If you come to a complete stop before the break-in process is completed there is the chance for non-uniform pad material transfer or pad imprinting to take place and the results will be what the whole process is trying to avoid. Game over.
In terms of stop severity, an ABS active stop would typically be around 0.9 Gs and above, depending on the vehicle. What you want to do is stop at a rate around 0.7 to 0.9 G's. That is a deceleration rate near but below lock up or ABS intervention.
A newly ground disc will require the same sort of bedding in process as a new disc."

G
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Old 06-05-2003, 11:30 AM   #6
ws6fiero
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Actually, you might be interested to know that when you put something on a metal lathe and reduce its outside diameter, that is also called "turning". This might have something to do with the origin of the term.
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Old 06-05-2003, 03:18 PM   #7
CosmoTheCat
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The instructions that came with the Brembo rotors I just put on my GF's truck said to take it easy, avoid heavy braking for the first 200km.

PS. A slight bump can set my ABS off with ~.2g braking forces. Which might by why the fuse is now in the ashtray.
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