I decided to start a blog in order to share ideas and details on the Star Trek (Kirk's) command chair that I was attempting to recreate for myself.  I found that during the process, there were many things that were not detailed enough, or explained.  I will attempt to detail some of the steps I took.

I will start with the support column.  When I installed the lazy-Susan, I noticed that there was a considerable amount of wobble.  Being the pack-rat that I am, I looked around and found an old front wheel bearing that was worn out. (not usable for a car, but for a chair...yes...)  The stack behind is a stack of wood circles that fit into the column...more about that in a minute.

On the side of the bearing you can't see in the picture, is the 5 bolts that would normally go through your wheel to hold it on. They are through the bottom of the chair cradle assembly.  

Next I cut out a donut shaped circle of wood that would fit over the wheel bearing and fit against the flat face of the bearing.  I placed some large screws (use bolts if you wish) thought the holes.  You'll notice the stack of wood circles.  I cut them to make the wheel bearing mount.  I also cut recesses into one that will mate with the one you see bolted on the bearing (you can just make out one at the top of the stack, they are not yet screwed together...more to come.

You see, I had made the base before I realized I might need to get into it to fix this wobble problem, so I cut a hole in the middle of the column base. (hence the need to come up with a way to put in a column to mount the bearing to.)

You can see the lazy-Susan in this picture.  I cut out the wood from the middle to gain access to the inside of the column (which I used as a template to make the stack).  Then, one at a time, I screwed in a wood circle, until I got to the desired height.  I cut another donut recess to allow the bearing to fit down into the column, flat.  You can just make out one of the bolts sticking up at the top of the picture, that is part of the bearing itself.  Each layer, including the last one that the bearing is attached to, is simply screwed into the previous one, until you have a whole column.  I think I used about 7-9 circles.  I cut them out on a band saw. The centers I cut with a jig saw.  As I said, the last wood circle is bolted to the wheel bearing and then I screwed the wood donut on it, to the rest of the stack.

This gives you a better view of the column, the stack, and the wheel bearing (facing the final direction).

Last but not least, the final installed version with the lazy-Susan on the outside and the strong wheel bearing in the center.  

After I placed the chair seats cradle onto the bolts (pass through the cradle bottom) I used oversized washers on the inside of the cradle bottom to displace any pressure that would be placed on the 5 bolts and nuts.

As far as a wheel bearing, you should be able to get one cheap from a junk yard or maybe a repair shop can give you one that they are throwing out.  I used about 95% recycled materials in my build.  I work at a plant that routinely throws out old crates, some with 2x4's, 2x6's, plywood etc..

Thanks for reading.