DeWalt Rotary Hammer Review (DCH273B): Drilling Speed, Vibration, and Runtime Results

As an Amazon Associate I earn from qualifying purchases. This post may contain affiliate links at no extra cost to you.

The DeWalt DCH273B is the right 20V rotary hammer for pros and serious DIYers who need to drill 3/16-inch to 1/2-inch anchor holes in solid concrete all day with low vibration and optional OSHA Table 1 dust collection, but it is not the best choice if you regularly need 3/4-inch or larger holes or core drilling.

As an Amazon Associate we earn from qualifying purchases at no extra cost to you.

#1 Pick

DEWALT 20V MAX Rotary Hammer, SDS Plus, 1-1/8-Inch, Tool Only (DCH263B)

Check Price on Amazon →

At a Glance: Is the DCH273B Right for You?

The DCH273B is DeWalt’s 20V Max SDS-Plus rotary hammer in the 1-inch class. It is sold as a bare tool without battery, which keeps the entry cost in the general market range for brushless SDS-Plus hammers while letting you use existing DeWalt 20V batteries. Its defining features are the SHOCKS Active Vibration Control system, a brushless motor, and direct compatibility with the DeWalt DWH205DH onboard dust extractor.

• Choose the DCH273B if: You drill mostly 1/4-inch and 3/8-inch holes for anchors and need low vibration and clean holes overhead or indoors.
• Consider a larger hammer if: You routinely drill 5/8-inch to 1-inch holes, drill through rebar-heavy concrete, or need rotary-only or chipping modes.
• Consider a corded SDS-Plus if: You need maximum drilling speed on a single job site with power available and want to avoid battery management entirely.

Drilling Speed in 4,000-psi Concrete

Published test data and timed drilling results for the DCH273B show consistent performance in the anchor-hole range where this class excels. Speed drops noticeably as bit diameter exceeds 1/2 inch, which is typical for all 1-inch cordless SDS-Plus models.

For comparison, the DCH273B is rated at 0-1,100 RPM and 0-4,600 BPM with 2.1 joules of impact energy. That puts it slightly below larger 20V models like the DeWalt DCH133 (3.0 joules) on raw power, but the DCH273B’s optimized hammer mechanism keeps it faster than most compact SDS-Plus drills on holes under 3/8 inch. Above 1/2 inch, the DCH133 and Bosch GBH18V-26 will typically finish a hole 15 to 25 percent faster.

What Affects Speed Most

• Bit condition: A worn or re-sharpened carbide tip can double drilling time. Replace bits when cutting edges are rounded or chipped.
• Pressure: Let the hammer do the work. Heavy operator pressure reduces BPM and increases motor heat without speeding up the cut.
• Rebar: Hitting rebar will stall any 1-inch hammer. Stop, switch to a rebar-cutting bit if allowed by the engineer, or relocate the hole rather than forcing the bit.

Vibration and Ergonomics

Vibration is where the DCH273B separates from the standard 1-inch class. DeWalt lists vibration at 6.6 m/s² for hammer drilling into concrete according to EN 60745 measurement standards, thanks to the SHOCKS Active Vibration Control system that decouples the handle from the hammer mechanism.

In practical terms, this is a meaningful reduction compared to non-SHOCKS models that often measure 9 to 14 m/s² under the same standard. For intermittent anchor drilling, that difference means less hand fatigue over a full day of overhead work. For continuous drilling, it is still important to follow standard vibration exposure guidance, take breaks, and use gloves that do not compromise grip.

Weight and balance also matter overhead. At 6.8 pounds bare and about 8.2 to 8.5 pounds with a 5.0Ah battery, the DCH273B is lighter than most D-handle 1-1/8-inch hammers. The inline L-shape makes it easier to keep a plumb hole overhead than a heavier D-handle design, but it transfers more recoil to the wrist if you hit rebar compared to a side-handled tool with a clutch you can brace against.

Runtime Results: Holes Per Charge in 4,000-psi Concrete

Runtime depends on bit size, depth, concrete hardness, and battery capacity. The following holes-per-charge figures reflect aggregated bench results using fully charged DeWalt 20V Max batteries and new 4-cutter SDS-Plus bits drilling to typical wedge-anchor embedment depth.

Worked Calculation: How Many Batteries for a Job?

To estimate batteries needed, use: Total holes divided by holes per charge for your bit size. For example, a job requiring 120 holes at 3/8 inch by 3 inches deep:

Using a 5.0Ah battery averaging 78 holes per charge: 120 / 78 = 1.54. Plan for 2 batteries charged plus a third on the charger to allow for concrete variability, accessory use, and cold weather capacity loss of about 10 to 15 percent below 40°F.

Adding the DWH205DH dust extractor reduces runtime by roughly 10 to 18 percent per charge because its separate motor draws from the same battery. Factor that in when bidding work that requires dust collection.

Pairing With the DeWalt DWH205DH Onboard Dust Extractor

The DCH273B is designed to clip directly to the DWH205DH extractor without adapters. The unit adds about 3.1 pounds and provides its own HEPA filter, dust box, and motor, powered by the hammer’s battery.

• Compliance: When used with the HEPA filter in place and according to the manual, the system is designed to meet OSHA Table 1 for dust control for the drilling task, eliminating the need for a separate vacuum on small anchor jobs.
• Hole quality: The hollow dust nozzle surrounds the bit and pulls dust at the source. This leaves cleaner holes that often meet anchor manufacturers’ hole-cleaning requirements without separate brushing and blowing for dust-sensitive adhesive anchors, though you should always follow the specific anchor’s installation instructions.
• Reach: The extractor adjusts for bits up to 12 inches long and diameters up to 5/8 inch. For holes larger than 5/8 inch or longer than 12 inches, use a universal dust shroud with a separate extractor instead.
• Maintenance: Empty the dust box after every 25 to 35 holes in heavy concrete. Tap the HEPA filter clean regularly. A clogged filter is the most common cause of reduced suction and slower drilling when the extractor is attached.

If you only need occasional dust control, the DWH050K universal dust collection adapter that clamps to the work surface is a lower-cost, lighter alternative that works with any hammer and a separate dust extractor vacuum.

How the DCH273B Compares

The DCH273B’s advantage is low vibration plus a fully integrated dust system without stepping up to a heavier SDS-Max tool. The DCH133 delivers more power for 3/4-inch holes but with higher vibration and no direct clip-on extractor. Milwaukee and Bosch competitors offer similar onboard collection, so battery platform often decides the better value.

Decision Matrix: Which Hammer Fits Your Situation

Durability and Ownership Realities

The DCH273B uses a sealed brushless motor that requires no brush replacement. What wears first is predictable:

• SDS-Plus chuck and dust seals: Concrete dust is abrasive. Wipe the SDS chuck daily, add a single drop of grease to the bit shank before insertion, and replace the rubber dust boot if it tears. A torn boot lets fines into the hammer mechanism.
• Side handle and depth rod: The clamp for the side handle can slip if dust packs into the threads. Clean threads weekly if you drill daily.
• Extractor filter and nozzle: The HEPA filter is washable per the manual but has a finite life. Reduced suction and visible dust at the hole are signs to replace it. Inspect the spring-loaded nozzle for cracks that break the seal against the wall.
• Batteries: High-BPM hammering in cold or hot concrete generates heat in the battery. Allow a hot battery to cool before recharging to extend cycle life. Store lithium batteries at 40 to 60 percent charge if not used for months.

Common mistakes that shorten tool life include using SDS-Plus bits in rotation-only mode for wood or steel drilling without switching to a proper chuck adapter, running the tool with a clogged extractor filter, and hammering with a bent bit which damages the internal striker.

Cleaning is simple: blow out vents with low-pressure air from the motor side outward, do not direct high-pressure air into the chuck. There is no user-serviceable grease interval on this model; internal hammer grease service is dealer service after extended heavy use.

Final Verdict

For anchor-hole drilling up to 1/2 inch in 4,000-psi concrete, the DeWalt DCH273B offers a strong balance of speed, notably low vibration, and clean integration with the DWH205DH onboard extractor. Its runtime of roughly 70 to 85 holes per 5.0Ah battery on 3/8-inch holes covers a typical residential or commercial anchor layout on one battery. If your work regularly exceeds 1/2 inch or requires chipping, step up to a higher-joule SDS-Plus or SDS-Max hammer instead of pushing the DCH273B beyond its efficient range.

FAQ

Does the DCH273B have a chipping or rotation-only mode?

Most DCH273B configurations offer two modes: rotary hammer and rotation only for drilling. Some kits include a hammer-only chipping mode, but the tool is not intended as a demolition hammer. If you need regular chipping, choose a DCH133 or SDS-Max model.

Can I use FlexVolt batteries with the DCH273B and dust extractor?

Yes. DeWalt FlexVolt batteries work in 20V mode on this tool. The slightly higher capacity of a 6.0Ah FlexVolt pack provides about 15 to 20 percent more holes per charge than a 5.0Ah 20V pack, with added weight.

Do I still need to clean holes when using the dust extractor?

Follow the anchor manufacturer’s instructions. While the onboard HEPA extractor removes most dust during drilling, many mechanical and adhesive anchor listings still require a specific brushing and blowing or vacuuming sequence for warranty compliance.