thanks for the replies. Good information on grinding out the heat treated area before turning. I would have burned up bits for sure. I like the pressure turning. I watched Joe Pi and was not familiar with that technique. I also thought about welding on a stub and grabbing it that way but after seeing the pressure turning video I think that may be the easiest.
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10 inch Disk?
- Thread starter Dgrose
- Start date
- Joined
- Jan 31, 2016
- Messages
- 11,516
These are used on 2 piece jaw chucks only . Take your jaws off and screw these into the inner or outer holes depending on size of plate you're machining . These are serated carbide pointed pads silver soldered onto 1/2-13 bolts and machined flat . 2 nuts screwed on lets you true up face of your part with one and one locks to chuck . Keep your pressure disk over these pads , they won't slip . I've had to trepan using these and while it's doable , it's not for the faint hearted . ( I'm still missing one in this set but the hunt continues ) 
