I wanted to make a easy laptop table for my recliner. after searching the internet for a idea i had no success . so i turned to my garage to find a inexpensive and easy way to make it turn. and what i came up with was taking a wheel like the one on a dolly, and unbolting the 4 bolts that hold the 2 pieces together. and you have a bolt on bearing swivel for the table.
what you need...
its up to you what kind of wood you want to use. i used different kinds i had laying around the garage.
but i used...
1-6" lag screw
1-dolly wheel that unbolts
1-bolt or all thread that fits the thru the bearing with 3- washers and 2 nuts and 1 or 2 cotter keys
a hand full of 1"1/4" wood screws [about 30]
2- 3" wood screws
paint or stain
each chair is different so your measurements will differ
i hope this helps you build your own table.