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Techniques - Revolving tops for garden stands
View of stands in another garden
These stands belong to another member, and are similar to those in the previous article.

 

It is necessary to revolve the trees at regular intervals so that all sides of the tree get the sun evenly. One method that many people use is the TV turntable seen in this picture.
The problem with this is that as it is not intended for outside use then the ball race rusts and it it has to be replaced after one or two seasons. With large trees the turntable goes between the pot legs and blocks off the drainage holes.
The turntable
   
Photo of office chair

With the original stand design the slatted wooden tops were bolted to the pillars. It was then decided it would be better to have the tops of the stands revolving.
The first thought was to use some type of ball race bedded into the pillar with a spindle bolted to the underside of the top.

However, in the end it was decided to go for a simple spindle and bush. As these components are not easy to get hold of at a reasonable price it was decided to go for old scrap office chairs.

   
Base of old office chairBush from office chair The base of the chair is easily dismantled by the removal of a circlip at the bottom.
The bush is fitted into a thin steel cylinder, and the cylinder is cut off as shown at the red mark three inches from the top.
   

The next thing to do is to drill a vertical hole in the centre of the pillar.
When the hole has been drilled the inside surface is coated with a preservative to protect the wood at least twice, and left to dry.
I then coat the steel cylinder on the outside with black silicone caulk, and then press this into the hole using a hammer and piece of wood as necessary.

The pillar with bush inserted
 

It was found that the diameter of all the spindles was 28mm so any spindle fitted any bush.
The metal cylinder diameter varied between 49 to 50mm.

It is important that the cylinder is a tight fit into the wooden pillar, and to do this one needs an adjustable cutter to make the correct diameter hole.
This one shown here was used and had to be altered to fit within the 50mm hole. The wing nut was ground back as shown here, and the cutter bar itself is shortened using a grinder.

The cutting tool
 
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