This is the turntable. The hub & spindle is from a 3000 lb trailer axle. The round top is 1/2" thick by 14" diameter. Drive motor is a cordless drill motor/clutch/chuck. Right angle gearbox is from an angle grinder. Speed control was 10 bucks new on Ebay. Legs are about 18" long with leveling adjusters at the ends. I welded a 1/2 inch plate to the spindle and turned it down to create a flange. 4 bolts hold the top on, or any other thing I might want to bolt to it.
Items to note:
The motor and speed control is electrically isolated via the plastic control box, rubber motor sleeve and plastic sprocket on the spindle. The unit runs on any 12v power source, I did not want house current in it in case anything went awry.
A copper wiper on the spindle conducts welding current around the hub bearings.
The input shaft to the angle grinder is a std 1/4" hex drive (welded on) so I can use any gearmotor by attaching a drill coupler to it. I found I needed different motors due to the extremely slow rotation required for some jobs. Cutting down a friend's 36" round steel fire pit with a torch required a 5 minute rotation, or about 1/16th of a rpm
All welds on the hub required preheat, nickel rods and slow cooling, as the hub is iron.
Runout at the edge of the table is about .009", one of the benefits of using a substantial hub and spindle. I wouldn't hesitate to put 1000 lb on it.
Flexibility and modularity were my design goals (and of course cheapness
). Feel free to ask any questions.
http://wiki.team1640.com/index.php?t...Turntable1.JPG
http://wiki.team1640.com/index.php?t...Turntable2.JPG