I also asked my dial indicator holder question at a tool site and received the following response:


" diyer -- The best place to anchor a dial gage for measuring runout on a brake disc is one that will move with the wheel spindle if the spindle is moved. It doesn't matter if the dial gage is anchored to the outboard end of the spindle or to the inboard end of the spindle.

Central Tool sells a dial gage holder that uses a pair of Vise-Grip pliers to attach a flex-bar . . . I like the Vise-Grip attachment but a typical flex-bar is too compliant for my taste. I have been very pleased with my Israeli-made Noga "hydraulic" magnetic base (about $80 US for the whole assembly including a "free" Chinese-made dial indicator.), and I'd be tempted to look at a way to attach the Noga to a Vise-Grip . . . maybe by epoxy-bonding a piece of steel flat stock to the Vise-Grip and using the Noga magnetic base, maybe by removing the Noga arms from the magnetic base and attaching the arms directly to the Vise-Grip.

Then, clamp the Vise-Grip onto the wheel spindle assembly's steering arm or onto a split-nut on the end of the wheel spindle . . . and go to town. John"


Does that make any sense? Why would I want the guage mounted on something that turns? I wonder what this guy meant. I thought you always want the gauge to be as rigid as possible. I know Volvo makes a big issue out of that.

diyer