It was mentioned at the beginning of the article that a circlip is removed to remove the base of the chair. That circlip actually fits at the very top of this spindle.
This metal section bolts under the base of the seat of the chair. It come in many different sizes and shapes and every chair seems to be different. Fortunately in nearly every case the diameter of the pressure cylinder is 28mm.
The only part of this unit that we require is 9cms of the spindle.
Warning. The spindle is pressurised and so cannot be cut with a hacksaw. It is necessary to get it done professionally with someone who has the right equipment, otherwise it can be very dangerous, and this warning is stamped on the cylinder. Do not attempt to do it yourself. |
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The next part to make is the metal frame to hold the spindle.
We have two pieces of 6mm thick steel bar 4cm wide and 28cm long.
The connecting strip of 6mm metal is 16cm x 8cm.The distance between the two long bars will depend on the measurements of the wood on your stand top. |
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The spindle is attached to the bars above using this collar.
It is 50mm round bar which has a 28mm bore, and is 20mm thick.
The spindle needs to be a tight fit in this bore, and is then tack welded on the side that will be welded to the base. |
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This has now been welded together and it is important to make sure the spindle is at right angle to the base.
When completed everything except the spindle is painted with Hammerite black paint.
It will be seen in the photo at the bottom of the page that we have a different type of collar, and details of this can be seen here. |
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We need four screws, spring washers, and nuts to connect the base to the stand top.
They are 6mm zinc plated screws 30mm long. |
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| This photo shows the underside of the stand top with the base plate fitted. The spindle is coated with Petroleum jelly (Vaseline). I also use a 28mm bore polethene washer between the bush in the pillar, and the metal collar and this is also lubricated with Vaseline. |
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This is the completed revolving table.
It will be noted in this photo, and the one above, that the sides of the top have been built up. This has been done to act as a skirt and so hide the bush.
This system is working very well and can cope with even the largest tree.
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