"TMC" wrote in message
...

"BraileTrail" wrote in message
...
I have a cheap circular saw from B&Q with a 20mm spindle and, I
think, 160mm blade. I want to get a thin blade for the saw to use to
cut access hatches in chipboard floors. Whenever I Google on the
subject clearly loads of references to products come up, but they
don't mention the width of cut. I did find a "fine" blade on the
Axminster site, but wasn't sure if that referred to the pitch or cut
width. Perhaps the 2 are related?

I was thinking of setting the saw to 45 degrees and just (!) deeper
than the board depth, then cutting a rectangular hatch.

What blade should I ask for and is this idea going to work anyway?

Thanks,
BraileTrail

Hi

Not sure that thin blades are an option

as the blade has to be thinner than the width of the teeth otherwise the
blade will bind I think that if you made the teeth narrower than say about
3 mm the blade wound become too thin to be stable

Even on a thin cut at 45 the material removed will cause the hatch to sit
lower than the surrounding floor

much better to make a vertical cut and batten around for support

Or better still use a router and those circular plastic inserts that fit
flush and take the routed out piece

Regards

something like this

http://www.powertoolsuk.co.uk/webcat...e=RBT3&ID=1773