Chuck Cleaning & Maintenance.

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The jaws have to under pressure when you grind them. There are several methods that are used. The simplest is to clamp a washer at the very inside end of the jaws and then grind up to the washer. After completing the jaw grind, remove the washer and with a grinding disc grind off the raised edge where the washer was and cut a little deeper to be sure you don't have a high spot. This will shorten the effective length of the jaws by the thickness of the washer.
 
That's the method I've seen online. I didn't want to make a ring for the jaws. The grinder is mounted and I need to true the stone. We'll see what happens after lunch.
 
The results are satisfactory. At 1" about the size I ground the jaws at I have .0005" TIR. At 1/2" I have about .0015" TIR. I had to grind the top jaws separately, so they ended up a slightly larger diameter. My grinder won't reach the full depth. I'll have to go back and do it again. But this time I know what to expect.

jawgrinding.jpg
 
wow diesel, what a nice photo you got there!

those 'special effects' are very cool :big:

joke apart, nice pic and good job
 
That is a two second exposure. The chuck was only turning ~20RPM. Photography is another hobby.
 

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