D. Brown
I purchased this tool for a single project, working on our new front porch. The design calls for 12 3/8" holes to be bored into a 15-year-old concrete slab for mounting strike anchors. So far I've drilled four of the holes, and I must say that this tool has turned what I was expecting to be a real fight into a pleasure.
Prior to this, my only experience with drilling masonry was an attempt two years ago to mount a door stop into a freshly-laid tile-over-slab floor. I managed that installation with a quarter-inch impact-rated masonry bit, the hammer drill setting on my Milwaukee cordless drill, and a great display of stubbornness. Boring the inch-deep hole took nearly ten minutes, and totally destroyed the masonry bit. As you can imagine, when this project came up and demanded TWELVE holes of half again the diameter and four times the depth, I decided that some better tooling was on the list. This Bosch DELIVERED.
Each hole took perhaps twenty seconds to drill into the aged concrete, using a 10" Bosch bit purchased from a local big-box store, and the bit looked as good at the end of the four as it did at the beginning. After brushing off the dust, you'd never know it had been used at all.
A few closing notes:
1: Wear ear plugs, this is a LOUD tool.
2: I vastly over-purchased for the job, but in this case overkill makes the project EASY.
3: This reconditioned tool looks new. There was a very slight amount of concrete dust on it, and it came in a 'reconditioned' cardboard box instead of the normal one. If it had been in a normal box, I would never have even noticed it wasn't brand new from the factory. A heck of a deal!
UPDATE - 02/16/11
I've used the tool several more times since I wrote the review. I drilled ten more 1/4" holes in a second slab of the same age as the first, to a depth of two inches (using the stop rod) to install floor anchors for some trim strips in our lower level. As before, performance was smooth, powerful, effective and loud. I have another project coming in the following months (installing a gate and post adjacent to a concrete retaining wall) that will require additional drilling, this seems to be the kind of tool that possession ends up breeding ideas for its use!
UPDATE - 01/07/16
Just used it again, this time to drill four very small-diameter holes with a Tapcon-branded bit, to hold down a new doorjam in the shop with (surprise) tapcons. Worked great, still just as awesome and as noisy as ever. Drilled two inches deep into fifteen-year-old concrete in a matter of just a couple seconds.
| Brand | Bosch |
|---|---|
| Power Source | Corded Electric |
| Maximum Rotational Speed | 1300 RPM |
| Voltage | 120 Volts |
| Amperage | 7.2 Amps |
| Maximum Chuck Size | 13 Millimeters |
| Color | Black Blue |
| Special Feature | Variable-speed |
| Product Dimensions | 24"L x 12"W x 5.5"H |
| Speed | 1300 RPM |
| Item Weight | 11.5 Pounds |
| Maximum Power | 850 Watts |
| Drill Type | Hammer Drill |
| Is Electric | Yes |
| Manufacturer | Bosch |
| Part Number | 11255VSRRT |
| Item Weight | 11.5 pounds |
| Item model number | 11255VSRRT |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Special Features | Variable-speed |
| Batteries Included? | No |
| Batteries Required? | No |
| Battery Cell Type | Lithium Ion |
| Warranty Description | Reconditioned Bosch products have a One-year warranty through the Bosch factory or an authorized service center |