[Miata] - turning down down brake rotors at home

[pethier at comcast.net]

From: "brad boston" <boston813roc at gmail.com>
> I have some free time at work and I was wondering if there was any reason
> that I should have my brake rotors turned down on a low speed brake rotor
> lathe at a brake shop instead of doing it myself.  If I bolt it to an old
> front hub it will fit in the collet and as long as it is still within
> tolerances when I am done there should be any problems... Right?

First, why are you turning them at all?

If they have no appreciable runout on an indicator, just clean them and use them again.  

Smooth concentric grooves are OK, too, as long as they indicate OK.  The new pads will bed into them.

By the way, "turning" is a common term, and correct in automotive usage, but from a machinist's point of view, the operation done on brake disks is "facing" and on drums is "boring".  "Turning" is done on the outside of a cylindrical object in a lathe.  :-)

--
Phil Ethier  West Side  Saint Paul Minnesota  USA
1962 Triumph TR4 CT2846L, 1992 Saturn SL2, 1993 Suburban,
1994 Miata C package
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