Choose between two exact cordless one-inch SDS-Plus tools and one exact corded 1-1/8-inch model after checking hole size, power access, dust control, and battery configuration.
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A rotary hammer purchase starts with the hole, the material, and the power source. These three exact SDS-Plus models cover two common cordless platforms and one corded alternative. They are not interchangeable kits: both cordless listings are bare tools, while the Bosch listing is corded.
Quick verdict: Choose the Milwaukee 2912-20 when you already own suitable M18 batteries and want its AUTOSTOP bind-up control. Choose the DeWalt DCH273B when your compatible 20V MAX battery platform is the deciding factor. Choose the Bosch RH328VC when continuous outlet power and its larger manufacturer-listed concrete-hole capacity matter more than cordless mobility.
At a Glance
These are manufacturer-reported specifications, not results from one controlled direct comparison. Impact-energy standards and stated capacities should be read with the exact manufacturer's documentation rather than treated as a universal performance score.
1. Milwaukee 2912-20 M18 FUEL 1-Inch SDS-Plus Rotary Hammer
Best for: Buyers already using Milwaukee M18 batteries who want a cordless three-mode tool with electronic bind-up control.
Milwaukee lists 2 ft-lbs of impact energy, 1,330 RPM, 4,800 BPM, three operating modes, an anti-vibration system, and AUTOSTOP kickback control. The exact Amazon destination is the 2912-20 bare tool, so a battery and charger are not represented as included.
Choose it when: The M18 platform, cordless movement, and electronic bind-up response are more important than avoiding battery management.
Check first: Confirm the intended bit and hole fall within the current tool documentation, and verify that the battery and charger you plan to use are compatible and suitable for the task.
2. DeWalt DCH273B 20V MAX XR 1-Inch SDS-Plus Rotary Hammer
Best for: Buyers already using compatible DeWalt 20V MAX batteries who need a cordless drill, hammer-drill, and chip-mode selector.
DeWalt identifies the DCH273B as a brushless one-inch SDS-Plus bare tool with 2.1 joules of impact energy, three application modes, and Active Vibration Control. The listed package includes the rotary hammer, side handle, depth rod, and adjustable hook, but not a battery or charger.
Choose it when: Staying on the DeWalt battery platform has more value than switching systems for a small paper-spec difference.
Check first: Verify the exact battery configuration, tool capacity, dust-control accessory, and bit required for the material and anchor manufacturer's instructions.
3. Bosch RH328VC 1-1/8-Inch SDS-Plus Rotary Hammer
Best for: Repeated drilling or chiseling near reliable 120V power, without buying or charging another battery.
Bosch lists an 8-amp motor, 2.4 ft-lbs EPTA impact energy, a 1-1/8-inch maximum concrete-hole specification, 0 to 900 no-load RPM, and 0 to 4,000 no-load BPM. Its selector covers rotary hammer, rotation-only, and hammer-only modes. Bosch also lists Vibration Control, an integral clutch, a side handle, depth gauge, and carrying case.
Choose it when: Corded runtime and the stated 1-1/8-inch concrete capacity fit the job better than cordless movement.
Check first: Plan the rated power source and extension-cord arrangement, keep the cord out of the drilling path, and confirm the exact bit, dust shroud, and extraction setup.
How to Choose the Right Rotary Hammer
Start with the required hole
Use the anchor, fastener, or accessory manufacturer's instructions to identify diameter and depth. Then compare that requirement with the rotary hammer and bit manufacturer's current capacity guidance. Do not choose solely from the maximum number in a product title.
Match the shank system
All three tools here use SDS-Plus. SDS-Plus and SDS-Max are different systems. Confirm the exact shank, diameter, length, and application before ordering bits or chisels.
Price the complete cordless setup
The Milwaukee and DeWalt destinations are bare tools. Compare the complete cost of the required compatible battery, charger, dust-control equipment, bits, and case rather than comparing tool-only prices with a corded package.
Concrete and masonry drilling can create respirable crystalline silica. OSHA Table 1 identifies handheld and stand-mounted drills, including impact and rotary hammer drills, and specifies a commercially available shroud or cowling with a dust-collection system for covered construction work. Follow the current OSHA requirements, employer program, tool instructions, and applicable local rules.
Do not rely on a clutch alone
A clutch or electronic bind-up control can reduce some reaction, but it does not replace two-handed control, the auxiliary handle, correct stance, a sharp suitable bit, or the manufacturer's instructions. Stop and investigate if the bit binds or the tool behaves unexpectedly.
Frequently Asked Questions
Can a rotary hammer replace a standard drill?
Not for every task. A rotary hammer is specialized for masonry drilling and, on compatible modes, chiseling or rotation-only work. A standard drill or impact driver can remain the better tool for many wood, metal, and fastening tasks.
Do these products include batteries?
The exact Milwaukee 2912-20 and DeWalt DCH273B destinations are bare-tool configurations. Verify the current package contents at checkout. The Bosch RH328VC is corded.
Which one is the most powerful?
The manufacturers publish different capacity and impact-energy figures, but those figures are not a substitute for one controlled comparison using the same bit, material, hole, power source, and measurement method. Choose based on the required hole, duty pattern, platform, control features, and complete setup.
Do not assume that dry drilling without controls is acceptable. Review the current OSHA silica standard and the applicable tool, dust-extraction, workplace, and local requirements before work begins.
Bottom Line
The Milwaukee 2912-20 is the direct M18 choice, the DeWalt DCH273B is the direct 20V MAX choice, and the Bosch RH328VC is the corded alternative. All three now link to the exact verified product configuration. Decide from the actual hole, power access, compatible batteries, dust-control plan, and full package contents.
Sources checked:Milwaukee 2912-20, DeWalt DCH273B, Bosch RH328VC, and OSHA respirable crystalline silica standard. Product availability was checked separately on the exact Amazon destinations on August 12, 2026.
