FATHERS DAY GIFT , used the hell out of it 4 times a week , grind off rust with cup wire brush, feel the power with the 9 amp flex volt battery and 5 amp 20 volt, safety trigger annoying , wish was variable speed, over all fantastic machine

So this is my first angle grinder so i cant really compare it to others. I do have many dewalt tools and batteries hence the reason i opted for this one. So far it has been able to cut through many pieces of metal with some cutting wheels from harbor freight and the battery seems to last a long time. I recommend this product for sure! it lives in my tool box with my other tools in my travel rig. Being that I am always in the back country and out doors, i can see tis being handy for emergencies along with the daily build projects.

This is my first angle grinder, so I am not writing with a lot of experience. Others have described the product well, so I will focus on the things I was uncertain of or confused about when buying it or starting to use it. Experienced users will probably not find this very helpful. I was planning to buy the DCG413, but this grinder (DCG416) was less expensive, even while seeming to be a higher spec product. It is, and I’m still not sure why this is less expensive, but I am happy to have it. Still, here are the questions I had, and the answers. First, will that Flex Advantage really make a difference if I use a Flexvolt battery. Yes, I have one 6 Ah Flexvolt battery and two 5 Ah standard 20v batteries and I have been using this with a cement grinding wheel to prepare a basement floor for tiling. (Tip: use the Dewalt dust shroud if you are doing that… really!) Anyway, not only is the tool noticeably more powerful with the Flexvolt, that 6 Ah battery lasts longer than both of the 20v 5 Ah batteries combined. Further, the Flexvolt battery is only mildly warm when run out, and charges immediately after use, while the 20v 5 Ah batteries are quite hot to the touch and the charger delays charging them while they cool down. I don’t know for sure, but my guess is that the 413 would have been a lot like this with the regular batteries. How long do the batteries last? Not long. Although the Flexvolt does much better than the regular 20v, I still probably only get about 200 sqft (about an hour or so) out of all three combined. For such continuous use, you could potentially find yourself frustrated by frequent charges unless you have 6-8 batteries that you could rotate (or 4 Flexvolt). I don’t mind because this is DIY work for me and I am happy to take the break and give my back a rest. What’s this 4 1/2” to 5” thing… which is it? Apparently, they have decided that this is powerful enough to run 5” discs and it comes with a 5” Type 27 guard, so you can run either 4 1/2” or 5” discs as you choose. Since there are many, many more 4 1/2” options, that’s what I’ve been running. Anyway, it’s all good. You have more options than with the DCG413. What’s all this about 5/8” or 7/8” arbor size. Which one is this? It took me a while, but I finally found the answer, which is both. The actual arbor is 5/8” so you can use those discs, but the backing flange includes an adaptor for a 7/8” wheel. Don’t stress about it, you can use either. A few other impressions… it takes a while to get used to using this tool. Don’t expect to be an expert from the start. It’s a powerful, and potentially dangerous tool. Be sure to watch some videos on how to use it safely. It really is important that you understand the physics of a spinning wheel, what part of the wheel to use, etc. The paddle switch is a bit awkward, but I’ll get used to it. The other option is a thumb switch on some other models, but I wouldn’t want that on a battery operated tool. I have to move around a lot, and I believe I am extending my battery life by not having it running while I move. If I had a corded model, I might prefer the thumb switch. This would be old news to experienced users, but I am in awe of the power of this thing. The closest thing I’ve come to what I am doing with this currently is an orbital sander (in the sense that I am scuffing up the cement floor so it will bind well with the thinset, like I do with a sander on wood before painting) and that sander is hugely forgiving next to this. If I set it down at an angle, it will gouge the floor. If I’m sloppy in lifting it up, it will gouge the floor. I always thought of cement as hard, but this tool really goes through it. Now I’m thinking of all the other things I can do with this that I could never do before. While I bought this for this one task, I am already seeing a lot of other uses for more traditional angle grinder tasks. This is a good choice for a DIY homeowner.

Get the 60 volt battery, you won't regret it. has as much power as my Bosch 5 inch corded grinder! it works ok with the 20 volt batteries also, but 2/3 the power and the batteries, I have the small 2ah ones, only last for 10 mins. The guard is great, tooless adjustment so you can swivel it around easily. The paddle switch is comfortable, not too heavy even with the big battery, grip is comfortable in my big paws.

I use a portable grinder quite a bit for work, cutting down rebar and sheet metal. A grinder is a pretty simple tool, all it does is spin a cutting or grinding wheel, so it is difficult to see how it could be greatly improved upon. This tool greatly improves old grinder technology. Firstly, the power of this tool is excellent. As powerful or perhaps even more powerful than many corded grinders. The downside of that is of course that it chews through batteries at a pretty fast clip. A fully charged 2ah Dewalt battery will last a few minutes, and a 4ah will last about 8-10. I don't have any flexvolt batteries so I was unable to test out how they perform, but even without a flexvolt the power is more than adequate. But what really sets this tool apart from all the other grinders I have used is the safety shutoff feature. Fraying, cracking and shattering abrasive blades happens in an instant with a normal grinder when the blade gets bound up (which happens very easily on long straight cuts, cutting anything with tension from weight such as rebar). This tool instantly cuts power to the blade and it stops - faster than I can see it happen. This does two things - one, it saves stuff from flying off and hitting and possibly injuring you. That alone is worth the purchase. The second is that it SAVES the blade. When you cut with this tool, the blades last much longer because they don't fray, crack and shatter on a regular basis. Even though abrasive blades are relatively cheap, I can tell already this tool will pay for itself in the reduction or elimination of blades damaged by the tool. Could not be happier with this grinder!