In article ,
John atte Kiln wrote:
Using the tile cutter with the guard up (obviously take care) I cut
tangents across the curve until it was more or less right and then
smoothed the curve with coarse emery paper.

The easier - although longer - way is to cut radii as close together as
you can be bothered to right up to the line, then snap off the 'fingers'.

For most tiles about 1/2" between cuts will be fine.

The curve will be as good as the number of cuts as obviously they will be
near straight lines between each cut when you snap off the bits. And a
half round tile file will finish the job if necessary.

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*Why is a boxing ring square?

Dave Plowman London SW 12
RIP Acorn