Alun
Crosscutting a cylindrical shape is asking for the blade to grab the wood
and over rotate it so as to kink the blade and scare you half to death, not
to mention the possiblility of some piece of flesh being pulled into the
blade. Use a large c-clamp (g-cramp to the UK folks) to hold the wood so as
to keep it from rotating. The clamp is positioned so that it grips the wood
and the bar of the clamp rides the table. There is a picture on my web page.

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God bless and safe turning
Darrell Feltmate
Truro, NS Canada
www.aroundthewoods.com