Bosch 060398400D Review

Few DIY tasks feel as daunting as drilling into a solid concrete wall. A standard drill driver with a masonry bit will get there eventually — but the noise is deafening, the progress is glacial, and by the time the hole is deep enough your arm feels like it has been through a workout. That is because conventional drills rely purely on rotation to grind through hard materials, whereas a rotary hammer adds a pneumatic hammering mechanism that pounds the bit forward thousands of times per minute. The difference is night and day: what takes minutes of straining with a combi drill takes seconds with a proper SDS rotary hammer. These tools were once the preserve of heavy-duty mains-powered machines that weighed over five kilograms — but modern cordless technology has shrunk them into compact, battery-powered versions that are genuinely practical for home use. Whether you are mounting a heavy TV bracket on a brick wall, running conduit through a concrete floor, or chiselling out a small section of render, a cordless rotary hammer transforms a punishing chore into a quick and almost effortless job.

When choosing a cordless rotary hammer, the first specification to check is the chuck type. SDS-plus is the standard for tools in this class — it holds specially notched bits that slide freely in the chuck, allowing the hammer mechanism to transfer impact energy directly to the bit tip without the bit spinning in the jaws. Many compact rotary hammers include an adapter that lets you use regular cylindrical drill bits too, which adds versatility. Impact energy, measured in joules, tells you how hard each hammer blow hits — more joules means faster progress in dense concrete and harder stone. Also consider whether the tool offers a rotation-stop mode for light chiselling, because being able to chip off old tiles or remove a patch of plaster without reaching for a separate chisel is a genuine time-saver. Battery voltage and capacity determine how many holes you can drill on a single charge, with 12-volt compact models targeting portability and 18-volt and higher models prioritising all-out power.

This review examines a compact 12-volt cordless rotary hammer that sits at the intersection of portability and concrete-drilling capability. We will look at its core specifications, the design features that make it practical for home use, and the real-world experience of drilling into brick, block, and concrete. If you have ever wrestled with a regular drill and a masonry bit, this breakdown should help you understand what a purpose-built rotary hammer brings to the table.

The tool is built around a 12-volt lithium-ion battery platform and uses Bosch's Syneon chip technology, which intelligently manages power delivery to balance performance and runtime. The motor spins the bit at up to 900 revolutions per minute while the pneumatic hammer mechanism delivers thousands of impacts per minute — Bosch does not publish the exact impact energy in joules for this model, but real-world use shows it handles concrete up to around 8 millimetres in diameter comfortably, with masonry and brick being even easier. The SDS-plus chuck accepts standard SDS bits, and the included adapter opens the door to ordinary cylindrical drill bits with a round shank — meaning you can also use it for drilling into wood and metal, albeit with a 6-millimetre maximum capacity in wood and 12 millimetres in metal.

Physically, this is a compact tool measuring roughly 24 by 6.5 by 18.6 centimetres and weighing about 1.1 kilograms with the battery fitted. The body combines plastic and metal in the areas that matter — the gear housing and hammer mechanism are metal for durability, while the outer shell keeps the weight down. A pistol-grip design with a soft-grip overmould gives you a secure hold, and the forward-reverse switch and variable-speed trigger are positioned for thumb operation without shifting your grip. A depth stop rod lets you set a consistent drilling depth, which is especially useful when you are sinking multiple Rawlplug holes for a row of shelf brackets.

In everyday use, the light weight is the feature you appreciate most. Rotary hammers are traditionally heavy, and using one to drill overhead — for ceiling light fittings or smoke alarm brackets, for instance — can be punishing. At just over a kilogram, this model can be held at arm's length for a run of several holes without your shoulder giving up. The vibration level is naturally higher than a standard drill because of the hammer mechanism, but it is well within tolerable limits for occasional DIY use. The two-mode selector lets you switch between rotary hammer (for concrete and masonry) and rotation-only (for wood and metal via the adapter), and the rotation-stop mode enables light chiselling — handy for removing small patches of plaster or chipping away tile adhesive.

The package is unusually generous for a tool in this price bracket. Inside the case you get the rotary hammer itself, one 12-volt 2.5 amp-hour battery, a charger, a drill bit adapter for cylindrical bits, two concrete drills in 6- and 8-millimetre diameters, a universal drill bit set in 5- and 6-millimetre sizes, and four long screwdriver bits. This means you can start drilling into concrete and driving screws straight out of the box — no additional purchases needed. The case is sturdy enough for transport and storage, with moulded cutouts for every accessory.

The rotary hammer carries a 4.6 out of 5 star rating from 457 customer reviews on Amazon, and it currently ranks at number 52 in the rotary hammers category. Bosch backs it with a two-year warranty that can be extended to three years with online registration, and spare parts remain available through Bosch's service network. At just over 110 euros including the battery, charger, bits, and case, the value proposition is strong — this is a complete kit at a price where many competitors sell only the bare tool. For a homeowner who needs to drill into concrete perhaps a dozen times a year, it is difficult to justify spending more.

A lightweight cordless rotary hammer ideal for homeowners and DIY enthusiasts who need to drill into concrete, brick, and masonry occasionally, with the bonus of light chiselling capability and a generous accessory kit.