Insuring smooth rotation and no wobble is the primary concern on a rotating bench. After shooting prairie dogs for many years from various manufacturer's wobbly benches, I designed a rotating bench which is smooth, rigid and stable. The bench is manufactured by my son's company, and can be seen at
https://custommetalprod.com/shooting-targets/precision-varmint-shooting-bench I offer this information, not as a sales pitch, but based on my nearly 40 years of prairie dog hunting and my experience as a design engineer and manufacturer. I saw what was available, and was able to make the changes that I felt were needed to make an effective shooting bench.
The rotation issue was addressed by providing a bronze bearing to support the weight of the table and shooter. The machined bronze bearing rides against a machined collar on the main tube. The main tube extends about 7" into the base tube, and is machined to fit closely to the base tube for smooth rotation with no wobble. In addition all the square tube and socket joints are trimmed for a close, no slop fit. Stability is insured by a large 8" X 11" steel top plate which supports the 13 layer Baltic Birch Plywood top. This means the top doesn't sag under the weight of the rest and rifle, yet it is all light enough to carry.
The legs and seat are adjustable with hitch pins, and thumb screws hold the top on, so no tools are needed for assembly/disassembly.
The top can be flipped over for a left hand shooter. It is of adequate size to hold the front rest , rear bag, gun, binoculars, ammo, wind meter, and other stuff, and is wide enough where needed to allow both elbows on the table when using binocs to find the dogs. All the excess parts of the top have been chopped off to reduce the buffeting caused by the wind.
The web page shows both a complete assembly and a unit without the top. I strongly recommend the complete assembly as the top is CNC machined to dimension, and being Baltic Birch is MUCH stiffer than normal plywood.
