Challenge circular saw blades

28 Oct 2006
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United Kingdom
I have a challenge circular saw bought from Argos a couple of years ago. The diameter of the blade is 185mm. The blade that came with the saw is a 24 teeth blade. I am looking to lift some tongue and groove floorboards and want to get a blade with more teeth for a finer cut so I can cut the tongue before levering up the floorboards.

Is it possible to get a 80 teeth blade with this diameter or would that be too fine. Most packs I've seen offer 20, 24 and 40 teeth in the pack. I am unsure if the 40 tooth blade would be ok or not fine enough for the work?
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Don't saw through any pipes just below the surface...
unless you have ruined or blunted the blade a 24 tooth will be fine
you dont have to go full depth to cut the tounge just 60- 75% depth assuming its planks and not boards
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boards/sheet material can have several levels off locking with overlap on both edges with the top off one board can be perhaps 12mm off the line off the bottom off the adjoining board
where as txg planks are simple roughly top 1/3 top off the groove middle 1/3 the groove and bottom 1/3 bottom off the groove so going through 75% should always seperate the tounge regardless off position in the board as the join line on the top is the same as underneath
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