DEWALT DCH133B Review

Drilling into concrete, brick, and masonry is one of the most common yet most physically demanding tasks on any construction or renovation project. Whether you are anchoring structural steel, installing electrical conduit, fitting plumbing pipework, or simply mounting heavy shelving onto a solid wall, the difference between the right tool and the wrong one is measured in sweat, time, and hole quality. A standard combi drill with a hammer function can handle the occasional 6 mm hole in lightweight block, but when the job calls for repeated 12 mm, 16 mm, or even 25 mm holes in dense structural concrete, you need a dedicated rotary hammer — a tool purpose-built to punch through the hardest building materials with a pneumatic hammer mechanism rather than a vibrating clutch. For professional tradespeople and serious renovators who need that capability without the tether of a power cord, a high-performance cordless rotary hammer with a D-handle design offers the ideal balance of power, control, and jobsite freedom.

Dewalt's XR — eXtreme Runtime — line represents their premium brushless cordless platform, and the DCH133B 1-inch rotary hammer sits near the top of the range. With 2.6 joules of impact energy from an 18-volt battery platform — marketed as 20V Max in North America — it competes directly with corded rotary hammers for the kind of hole sizes that make up the majority of professional fixing work. The hammer mechanism is manufactured in Germany, a detail that speaks to the precision engineering inside the tool, and Dewalt claims the durable design provides a long service life even in the hardest concrete. The D-handle format — with the rear grip positioned behind the motor body — is the traditional professional configuration that provides excellent control for horizontal and downward drilling, and the mechanical clutch protects both the user and the tool if a bit jams.

This review examines the Dewalt DCH133B 20V Max XR brushless D-handle rotary hammer in detail. We look at the 2.6-joule impact mechanism, the 0 to 1,500 rpm speed range and 5,550 blows-per-minute hammer rate, the SDS-Plus chuck, and the electronic speed control that maintains RPM under load. We assess the German-made hammer mechanism durability, the compact dimensions that allow access to confined spaces, and the value proposition of a bare tool that slots into Dewalt's extensive 20V Max battery ecosystem.

The DCH133B is built around a brushless motor driving a pneumatic hammer mechanism rated at 2.6 joules of impact energy — a figure that places this cordless tool in direct competition with many corded SDS-Plus rotary hammers. The motor delivers a no-load speed of 0 to 1,500 rpm with an impact rate of 0 to 5,550 blows per minute, and Dewalt's electronic control system maintains speed under load so the bit does not bog down when it hits a hard aggregate or a piece of rebar. The rated optimal drilling range in concrete is 5 mm to 16 mm — the sweet spot for wall plugs, anchor bolts, and through-holes in the sizes that make up the vast majority of professional fixing work — with a maximum capacity of 25 mm for occasional larger holes. The SDS-Plus chuck provides tool-free bit changes and accepts the full range of SDS-Plus bits up to the tool's capacity.

The hammer mechanism is manufactured in Germany — a detail that Dewalt specifically highlights and that carries implications for precision and durability. German-made pneumatic hammer mechanisms are machined to tighter tolerances, which translates to more efficient energy transfer from the piston to the bit, less internal wear over time, and a longer service life before the mechanism needs rebuilding. The mechanical clutch is designed to disengage the drive if the bit jams — a critical safety feature when drilling through reinforced concrete where hitting rebar can cause the bit to bind instantly. Without a clutch, a jammed bit transfers all the rotational force into the tool body, which can wrench the user's wrist or throw them off a ladder. The D-handle design with the rear pistol grip and forward support handle provides leverage to counteract this torque.

In daily professional use, the D-handle format is the preferred configuration for most tradespeople doing horizontal and downward drilling. The rear grip keeps your hand behind the centre of mass, which makes the tool naturally point downward — ideal for drilling into floors and low walls — and the forward auxiliary handle lets you brace against the tool's torque reaction. The variable-speed trigger provides proportional control from a slow start for accurate bit placement up to full speed for rapid drilling. Dewalt has engineered the body to be compact — 406 mm long by 99 mm tall — which allows access to tight spaces between joists, inside cabinets, and in other confined areas where a larger rotary hammer would not fit. The tool weighs 2.27 kg, which is substantial enough to dampen vibration but light enough for one-handed positioning before the second hand takes over for the actual drilling.

The tool runs on Dewalt's 20V Max battery platform — the same batteries that power their drills, impact drivers, circular saws, and dozens of other tools. With a 4 amp-hour battery, runtime is sufficient for a full day of moderate drilling on most job sites, and the brushless motor extracts more holes per charge than a brushed equivalent. The tool is sold as a bare unit, which makes the most financial sense for users already invested in Dewalt 20V Max batteries — the headline price of around 216 euros drops into the tool itself, and you use batteries you already own. For first-time Dewalt buyers, the effective cost rises by the price of a battery and charger kit. The tool includes the rotary hammer drill only, with no bits, case, or depth stop listed in the included components.

Customer feedback is exceptional: 4.8 out of 5 stars from nearly 2,000 reviews — a rating volume and average that is rare for any power tool, let alone a specialist rotary hammer. Users consistently praise the drilling speed in concrete, the German mechanism's durability, and the compact dimensions that fit where larger rotary hammers cannot. The bestseller ranking places it prominently in the rotary hammers category. For the professional electrician, plumber, HVAC installer, or general contractor who needs a cordless rotary hammer that delivers corded-level performance with the freedom to work anywhere on the job site, the DCH133B makes a compelling argument — particularly for those already carrying Dewalt 20V Max batteries in their tool bag.

The Dewalt DCH133B is ideal for professional electricians, plumbers, HVAC installers, and general contractors who need a powerful cordless rotary hammer for daily fixing and drilling work in concrete and masonry.