Thanks Dave,
I agree that a rotor should be primarily centered for balance reasons and a drum is centered just as much for braking reasons too.
From the 2007 axle/hub/rotor I have the following measurements.
Hub pilot diameter (for rotor) 4.830"
Rotor bore (pilots on hub) 4.834 to 4.835"
This is about 0.004 to 0.005" clearance on what I'm pretty sure are factory parts, not aftermarket or replacement rotors. This is the sort of fit I want and I have no concerns about. Also don't see any problem if the rotor gets warm, expands, and later contracts back to normal.
Thanks for the hub centric ring link, that pretty well illustrates what I've had in mind, we're thinking the same thing here. I want to make them from steel with a light shrink fit on the hub. This will bring the hub I'll be using up to match the diameter of the original hub that fits the rotor I'll use.
The other rotor option suggested, measured at 4.63 to/or 4.64 is still 0.040-0.050" over the 4.59" hub. In my opinion not an appropriate fit without another method of centering the rotor. Judging/comparing by the factory fit of both drums and rotors on their intended hubs with about 0.005" clearance; 0.040" is not close enough to serve the purpose of centering the rotor.
Because a bushing to correctly fit this rotor on the hub would be very thin I've decided to use the rotor with larger bore, easier to make and fit a bushing with a thicker wall.
For what it's worth that's how I see the situation and how I'll deal with it to suit my needs/desires.
Grigg
