Cutting Hardie Board

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Junior Member
Apr 29, 2009
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I need to cut a large circle from 2 pieces of Hardie board. Which cutting tool/s will give me the cleanest cut?
What is the dia. of the cutout?

What is the thickness of the material?
This is to take the place of a glass top that broke. The diameter will be 53" cut from 1/4" thick hardie.
Thanks for the info and the links. I had no idea hardie board could be smoothed out or polished.
There is a learning curve, so refine your talents on some of the scraps.
Sparky, are you saying the edges can't be smoothed out?
I should have mentioned this table top will be painted then epoxied. Could have chosen plywood am trying to save my client $.
Unless this is going to be attached to 3/4 plywood, it's not going to work.
Hardie board has 0 top loading strength.
I see what you're saying but it will sit on a metal crossbar and I thought the epoxy would give it additional strength. Otoh, it might be less hassle and more peace of mind just going with plywood.
Just a really bad idea!
It would be cheaper and faster to just by a new table.
The only time I've seen this work out is when the guy cut out a piece of 4 X 8 X 3/4" PVC to fit.
It worked perfect, but looked like poop.