BOSCH RCB9DG 1-Piece 9 in. 50 Grit Diamond-Grit Edge Reciprocating Saw Blade for Cast Iron, Block

Where other blades struggled to cut 6” clay drain pipe, this blade made the cut. Sure it takes a while to work thru the material but it gets the job done. I only need to make one full cut so can’t comment on overall durability.

This blade cut through a cast iron drain pipe that nothing else would touch! Highly recommended!

There is probably no more expensive way to cut concrete block or cured concrete, however it does the job. In my situation I needed to expand a crawlspace opening to make entry/exit and moving tools/materials in and out somewhat easier. Cutting the cured concrete with this blade is slow going and wears the blade down pretty quickly, however after a few cuts there is still some life left in it, and I think I could probably make it through one or two more bricks before the blade is toast. There are areas that are simply impossible to cut with either a concrete saw, a 7" abrasive blade, or a 4 1/2" angle grinder and in those cases this blade is what's called for. I used the abrasive blade on the angle grinder whenever possible - it's by far the easiest method. For the longer, straight cuts I used the 7" blade in a circular saw (a larger concrete saw was too big to get in the confined space). I also used an air chisel to remove a good amount of the larger pieces. But the cuts down the sides were not possible with the angle grinder or the larger saw, and the air chisel would have made a mess. This but bade worked however and got the job done.Overall - my recommendation is this: If you can make the cuts another other way, try that way. Angle grinder and a air chisel are the best bets, and if you have long, shallow cuts the 7" blade in a older or dedicated concrete circular saw works well. But tight corners and areas where those tools won't work, this blade may be just what you need.

Works well on concrete/stucco. But one blade cut through double thickness stucco of an area 4”x3” (for outlet socket) but was pretty much done on completion.

My house is about 70 years old with a brick exterior. I was enlarging an opening for a window. I made the initial cuts with a circular saw. I tried to use this blade on my reciprocating saw to finish the cuts, as the circular saw could not cut deep enough. The blade failed to cut the brick and after a minute or two of use the abrasive material had worn off. This may be a good blade for other material but it should not be advertised as able to cut brick.

I was doing some plumbing work and had to cut through my 4 or 5 in 1920s cast drain pipes so I could put a rubber boot and connect to PVC. Long story short it did the job.There are a few different options for cutting pipe, some easier or more cost effective than others. Blades like this can be pretty expensive, but the deal here for 20 was ok. Someone mentioned that they used a grinder and if you have a diamond blade for that and it's cheaper, seems reasonable.I had only a cheap $30 HF recip saw when I did this, and it worked just fine. It wasnt particular fast, but a couple minutes with this diamond blade and I had a clean cut. In fact I was able to make 3 cuts and the blade still seemed ok. For the reviews I was expecting maybe I'd only get 1 cut, and that was fine, but when the need arose to make more, this blade was up to the task. Not sure how many more this blade has in it, but 3 cuts through 5" cast was no prob.I'd recommend this blade and would buy it again should I ever have another similar project.

It got the job done but it was slow. It didn’t go as quickly has there videos show.

OK, so you know I am going to like this. Its Bosch. Its actually made in Germany. And its covered in industrial diamonds. So this is a 10 on the man-cave Shiny scale. I bought it to cut some thick stainless steel angle which was too much for my carbide metal cutting blades. It was doing OK, not great but I expected a lot more than I got. I could see visible wear on my coveted Bosch blade with just the first cut. Eventually I put the blade away and with a small sob of defeat got the thing cut by an industrial power hack saw. Take THAT! So I have to admit Bosch+German+industrial diamonds did not really live up to expectations. Sometimes technology is like that, but it often costs a lot of money to find that out. So my advise is that if your standard carbide blade isnt doing the job, this diamond blade is not likely to do much better. Never tried it on tile or ceramics, but keeping it around for that someday and possible redemption. I wonder how much an industrial laser costs?

Worked great to cut some cast iron pipe in an old house. Got about 5-6 cuts with it which is above average for this type of project.

Cuts through steel pipe.

good work