Well after looking around and getting really tired of using a wrench every time I needed to move the tail-stock it was time for some modification. I wanted to try the camlock on the HF 7X10 befor modig the 9x30 in case I didn't like the results, but I now wish I would have done this along time ago. I used the original plate that clamps to the bottom of the bed, made the block and piston out of 7075 Aluminum and the cam is made from steel. I reused the handle that is used to changing the gears from high to low so I didn't have to make a new one. For the 9X30 I will also use the block that clamps to the bottom of the bead but I will have to make the handle this time along with all of the other parts.
Here are some photos of everything I made. The machine work is very rough because I used mainly the lathe and a drill press to do this and it was only a test run.
This is the block I made, the cam holes are 1/2" and the hole for the piston is 7/8". There is a angle cut on the bottom to match the slope on the bottom of the tailstock where is sits.
This is the piston. the cam hole is again 1/2" and the bottom is threaded for the original clamping plate.
Here is the cam. to get the offset I mounted it in a 4 jaw chuck.
Here is the handle holder I re-used. You can see that the handle screws through the mount to act as a setscrew on the cam. This keeps the cam from sliding out.
And here it is all put together. I cut a grove on the other end of the cam and places a lock ring around it.
Here is a video of it in action.
[nomedia="http://www.youtube.com/watch?v=XynlJ5DKbFI"]YouTube - Cam lock Tail Stock[/nomedia]