DEWALT DCN890 CORDLESS CONCRETE PINNER
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Has anyone tried one of these??ÿ Currently, I use a hammer drill for concrete. I wonder if this will drive nails with accuracy. The hammer drill often walks from the pinpricked hole.
I use the DeWalt SDS rock drill and mark the concrete with a star drill or other tool that will keep the mark.
My experience with power nailers -- the .22 caliber kind -- in concrete is that you get too many blowouts, especially if you happen to hit a large bit of aggregate.?ÿ I wouldn't expect an electric power nailer to do any better.?ÿ And even if the nail goes in clean you're left with a nailhead that's proud of the surface such that it'll catch a shovel blade.?ÿ
Those two conditions led me to switch to the Berntsen 1" disks.?ÿ Scribe a cross at the point, drill the hole as close to centered as you can, install the disk, reproduce the point from the scribe marks, and punch the disk.?ÿ You have 1/2" to play with in all directions, so even if the drill wanders a little you're still on the disk.
proud of the surface
Beautiful english. ?ÿPoetic.
Use of "proud" to mean "sticking up" is pretty common in the world of machinists, in which I'm a not-especially-talented hobbyist.?ÿ (Side note:?ÿ as someone who makes his living measuring things, you'd think I'd be good at "measure twice, cut once," but the number of times I've gotten that backward when machining stuff is kind of impressive.)
