I've had another go at the composite corks from wine bottles trying to get a better finish. The ones that I started last week are finished and ready for fishing. The one on the left is better than the other one that took a lot more filler to get smooth.
The hardest part of making the cork bodies is getting the corks centered up in the chuck of the mini lathe. The chuck has four independent grips and they have to be finely adjusted to ensue that the cork spins without wobbling. The chuck is only just wide enough to hold a wine cork. Today I used the centre marking guide to mark where the drill bit should align and then used the drill bit as a fixed marker so that I could align the cork accurately
Then by shaving down the other end of the cork I could fit the body further into the jaws of the chuck. In order to drill through each body using a 3mm bit. That allowed the body to be jammed onto a bamboo skewer that had been thickened using masking tape. With the body secure in the chuck and a hole at the other end that could be supported by the rotating centre on the tail stock I could use the cutting tools to quickly shape the bodies.
The cutting tools leave a rough finish in the cork so they were finished off with the disposable nail files then a light sanding with well used 800 grade emery paper.
Once I had the bodies shaped I put a length of 5mm beech dowel in the chuck after putting a detent in the other end using a small cross head screwdriver for the rotating centre to fit in and support it. Using the cutting tools followed by the nail boards I tapered down one end for the bottom of the float and cut a spigot at the other end to fit inside the cork body.
Once the dowel had been shaped it could be cut down ready for guing into the cork body. A half cocktail stick is used to support the quill for the upper end of the float. I would have liked a thicker quill, but that is the best that I could find in my stock.
The cork body isn't yet perfect. It needs a bit of filler using a paste made from sanding sealer and wood filler then sanding back to the cork. That is tomorrow's job.
Cork bodies made this way need a lot more work than balsa especially if you can get balsa round dowels. And the balsa bodies can be more easily rendered smooth. They do however have a vintage look to them that isn't the same with balsa floats.