The chuck is from grizzly. The jaws for a oneway and nova chuck will interchange on this chuck, other than the thread size on the grizzly was smaller, so I drilled and re-tapped the holes in two of the jaws on this chuck so that I could use the same mounting bolts as the nova on my midi lathe.
These jaws work well and are easy to align so that you get a perfect drilling every time.
The jaws are 1" thick, so to drill, you draw your lines where you will drill both the airway and chamber. Then you draw another line 1/2" above the drill lines. Then line the top of the jaw with the top line you drew and tighten the chuck. Repeat for your other hole and you should have perfectly aligned drilling when your done.
These jaws have done both myself and my buddy a good job for about 3-4 years now.
