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BOSCH 11255VSR Bulldog Xtreme SDS-Plus Rotary HammerEach22.5 x 11.25 x 4.75 inches10.4 poundsCheck on Amazon
Quick verdict
The DeWalt D25263K is the faster concrete drill for most jobs. Its higher no-load speed, higher impact rate, and larger 1-1/8-inch SDS-Plus capacity give it an edge when drilling anchor holes repeatedly or using larger bits. The Bosch 11255VSR is still a capable 1-inch rotary hammer, and it is the better value when you mainly drill holes from 1/4 to 5/8 inch in concrete.
Neither tool is a replacement for an SDS-Max hammer on large holes, heavy chipping, or all-day demolition. These are corded SDS-Plus hammers for masonry work, concrete anchors, Tapcon holes, small core drilling, and occasional chiseling.
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Bosch 11255VSR vs DeWalt D25263K specifications
| Specification | Bosch 11255VSR | DeWalt D25263K |
|---|---|---|
| Motor | 8 amps | 8.5 amps |
| Chuck system | SDS-Plus | SDS-Plus |
| Maximum drilling capacity | 1 inch in concrete | 1-1/8 inches in concrete |
| No-load speed | 0–1,300 rpm | 0–1,550 rpm |
| Impact rate | 0–5,100 bpm | 0–5,680 bpm |
| Operating modes | Hammer drill, rotation only, hammer only | Hammer drill, rotation only, hammer only |
| Vibration control | Basic rear-handle damping | Active vibration control |
Published energy figures are not always measured the same way between brands, so they do not predict drilling speed by themselves. In practical use, the DeWalt’s faster rotation and impact rate matter more than a small difference in advertised joules or foot-pounds.
Which one drills concrete faster?
For typical holes, the DeWalt wins, but the margin depends on the bit and the concrete. In a sound concrete slab, a sharp 3/8-inch or 1/2-inch SDS-Plus bit should make either tool feel quick. The D25263K pulls ahead more clearly with 5/8-inch, 3/4-inch, and 1-inch holes, where the Bosch’s lower speed and smaller rated capacity become noticeable.
The DeWalt is also the better choice for drilling many holes in succession. Its 8.5-amp motor has slightly more electrical headroom, and the higher impact rate helps break aggregate as the bit advances. Do not interpret that as permission to force it. Pushing hard enough to stall either hammer slows the job, overheats the motor, and can glaze or damage the bit.
A realistic job example is installing concrete sleeve anchors. For four or five 1/2-inch holes, the difference may be only seconds per hole. For 30 or 40 holes, the DeWalt’s advantage adds up. If you routinely drill only two or three holes for a handrail, fence post, or small equipment mount, the Bosch is fast enough and may be the smarter purchase if it costs substantially less.
Handling, vibration, and control
The D25263K has a more convincing vibration-control system. That matters when drilling overhead, working from a ladder, or spending several hours making holes. Lower vibration does not make the tool harmless, but it reduces hand fatigue and makes it easier to keep the bit straight.
The Bosch 11255VSR is compact and familiar to many contractors. Its controls are straightforward, and it has enough power for normal SDS-Plus work. However, the rear-handle damping is not in the same class as the DeWalt’s active vibration control. With either hammer, wear hearing protection, eye protection, and a dust mask or respirator suitable for silica. Use a vacuum or dust-extraction shroud whenever the job allows.
Both tools have three modes. Hammer-drill mode is for concrete and masonry. Rotation-only mode accepts suitable chucks or adapters for ordinary drilling, although a rotary hammer is bulky for wood and metal work. Hammer-only mode is useful for light chiseling, removing tile, and chasing mortar. Neither is the right tool for breaking a thick foundation or removing large amounts of reinforced concrete.
The bit can matter more than the hammer
A worn SDS-Plus bit can erase the speed advantage of the DeWalt. If the carbide tip is rounded, the flutes are packed with dust, or the bit has been overheated, replace it. Use a four-cutter or other high-quality SDS-Plus concrete bit set for general anchor work, and match the bit diameter to the anchor manufacturer’s instructions.
Clear the hole periodically on deep drilling. Withdraw the bit every few seconds to evacuate dust, especially in dry concrete. A packed hole cushions the hammer blows and makes the tool appear weak. For holes deeper than roughly 4 to 6 inches, a longer bit and more frequent cleaning are essential.
Rebar is a separate problem. If the bit suddenly stops cutting and the tool begins grabbing, you may have hit steel. Do not lean harder on the hammer. Move slightly if the anchor layout permits, or switch to a bit intended for reinforced concrete. A standard masonry bit can be ruined quickly against rebar.
Which one should you buy?
Buy the DeWalt D25263K if you drill concrete regularly, need holes near its 1-1/8-inch limit, or value lower vibration during long sessions. It is the stronger choice for contractors and serious remodelers, particularly when downtime costs more than the purchase-price difference. If you need compatible accessories, budget for a good SDS-Plus chisel and bit set rather than relying on a bargain assortment.
Buy the Bosch 11255VSR when the work is occasional and the price is clearly lower. It handles anchor holes, masonry drilling, light tile removal, and small chipping jobs without drama. Its 1-inch rating is not a practical limitation for most homeowners, because common concrete fasteners rarely require larger holes.
If your work involves frequent 1-inch-plus drilling, large core bits, or demolition lasting hours, skip both and move up to an SDS-Max rotary hammer. That category is heavier and more expensive, but its larger bits and greater impact energy are designed for work these compact SDS-Plus machines can only approach slowly.
Bottom line for the job
Choose the DeWalt for maximum drilling speed and lower fatigue; choose the Bosch when the job is smaller and the savings are meaningful. In either case, a sharp bit, dust removal, correct pressure, and a clear plan for rebar will affect the result more than a small difference in motor rating. For ordinary homeowner anchor work, the Bosch is sufficient. For repeated production drilling, the DeWalt earns its premium.