Test post. I had written a rather long post and when I tried to submit it, it gave me a "Forbidden" error and all was lost.
Basically I was saying that it was not the chuck that came unscrewed from the table, but the adjusting nut from the bushing. It might have been good to have drilled and tapped some holes where he drilled them for the spanner, and used set screws to keep it from unscrewing. Also, without such positive locking, the work could have unscrewed a little bit between each milling operation, and the angular positions might have lost some accuracy.
For my 6" rotary table, I'd have to remove my 4" 3 jaw or 6" 4 jaw chucks from their threaded adapter plates, and bolt them to the table with the T-slots. But for small work I have a mini-lathe chuck with an MT2 taper that might work on the table, but I think it screws onto the adapter, and would need to be secured. My 4" chuck has a spindle clamp so it can be used in reverse. I need to make one for my 6".
OK, I'm saving this first. That'll probably guarantee I won't get the dreaded "Fobidden PHP" message!
Got it again! It might be because of the emoticons? Seems to be...
Here's the message:
Forbidden You don't have permission to access /index.php on this server.