There is a little bit of work is making the central column spacer for each step. Each step rise is 210mm. I am using 24mm furniture grade birch plywood for the steps which results in a column space height of 186mm. I make these columns out of a sandwich of 7 disks of 24mm plywood and a single 18mm disk.
I use an adjustable hole cutter to scribe a 130mm disk in the top few millimetres of the plywood and then cut out the disks with a jigsaw. I then glue and screw the disks together to make a column that is 186mm tall. I use a short piece of 20mm conduit to align the centre of all the disks.
With the rough column spacer mounted on my lathe I turn it to a smooth cylinder. It only take a few minutes with a roughing gouge to turn a 120mm cylinder. The final few millimetres are removed with a scraper. While still mounted on the lathe I sand the part smooth before finishing with 3 coats varnish.





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