There is no DeWalt available in 2012 that uses that blade. It went out of stock about 5 years ago.
The Dewalt DW718 Dual Compound sliding Milter Saw has a 12 inch blade. If one is looking to purchase this saw, it is available on Amazon for a decent price.
At least 40 teeth on a 71/4 in circular saw blade
a concrete or masonry blade
You can purchase a Dewalt chop saw online from stores such as The Home Depot. You can also find a Dewalt chop saw for sale from retailers such as Amazon.
A carbide blade with large teeth about 3 per inch.
I like to use a 12 inch dewalt miter saw. But really it depends on what you will be trimming to figure out exactly what size you will need. Mike
teeth per inch
I recently did cut up a fibreglass tub with a DeWalt reciprocating saw (sawzall in vernacular ) and found the best blade was a 9" demolition blade . I had tried a fine tooth metal cutting blade and it was too slow.
A DeWalt Mitre Saw can be purchased directly from DeWalt or reputable supply re-sellers such as Screwfix & Amazon. In a addition these sources offer a variety of accessories for the saw.
It is approximately 1/32 inch thick.
There is no such thing as a maximum tension. That depends on the ability of the saw to apply tension-an 18 inch industrial saw can apply more tension to a blade than a 6 inch hobby saw-and the ability of the blade to withstand tension before snapping. The blade's ability to accept tension depends on its size (width and thickness, not length) and the material used to make the blade. A 2 inch blade withstands more tension than a one inch blade of equal thickness. Some steels and carbide are usually brittle (accept static tension) while others are more flexible and better at handling tension while moving.
Different types of Chop Saw products include Dewalt Chopsaw with Keyless Blade, Porter-Cable Chop Saw and Porter-Cable 15 Amp Chop Saw. You can purchase these saws online from retailers such as Amazon.