Choosing a Cordless Drill for Trade Work

Start With the Work, Not the Voltage

Walk into any tool shop and the numbers on the boxes can feel like a competition. Twenty-four volts here, eighteen there, torque figures in Newton metres that sound enormous. It is easy to assume the biggest number wins. In practice, the right cordless drill for trade work is the one that matches what you actually do all day, five days a week.

Think about your typical week. Are you driving screws into studwork and hanging doors, or are you boring 10mm holes through engineering brick for cable runs? Do you mix timber, masonry and metal, or is your work almost entirely one material? The honest answer to that question will point you towards the right combination of voltage, torque and battery platform far more reliably than any sales badge.

Voltage: What the Numbers Really Mean

Voltage is a rough indicator of the power a drill can deliver, but only within the same battery platform and generation. An 18V brushless drill from a current range will comfortably outperform an older 18V model, and often a 24V one from a decade ago.

• 12V – Light, compact and ideal for cabinet fitting, second-fix work and driving screws overhead. Fine for small holes in timber, limited for masonry.
• 18V – The trade standard. Handles the overwhelming majority of drilling and driving tasks, from 25mm spade bits in softwood to 8mm holes in brick with the right bit.
• 36V and above – Reserved for core drilling, heavy SDS work or prolonged high-torque applications. Heavier, more expensive and rarely necessary unless the job genuinely demands it.

For most tradespeople, an 18V platform is the sensible centre of gravity. It gives you enough grunt for masonry while staying manageable when you are up a ladder with one hand free.

Torque: The Figure That Actually Drives Screws

Torque is measured in Newton metres (Nm), and it is the number that determines whether a drill will drive a 100mm coach screw into oak or stall halfway. Two figures matter: maximum torque and, on better drills, the torque clutch settings.

As a rough guide, a combi drill in the 60–80Nm range will handle almost all general trade work. Impact drivers typically deliver higher torque figures in a smaller body because they apply rotary impacts rather than pure rotational force. That makes them excellent for long screws, but poor for precision work where you do not want the bit to cam out.

Do not ignore the clutch. A drill with twenty or more clutch settings lets you dial in the right amount of force for the screw and material, protecting both the workpiece and the screw heads. For joinery and finish work, this matters more than raw maximum torque.

Battery Platform: The Decision You Only Want to Make Once

Batteries are the single biggest ongoing cost of cordless tools, and they lock you into an ecosystem. If you own six tools that share one battery, your next purchase is cheap. If you own six tools across three platforms, you are carrying three chargers and three sets of batteries everywhere.

Before you buy, look at the wider range on that platform. Does it include an impact driver, an SDS drill, a circular saw, a multi-tool, a nailer? Do you want a 4Ah battery for a drill and a 2Ah for a compact driver? Most manufacturers offer several capacities within one voltage.

• Stick with one platform across your main tools wherever possible.
• Buy bare units once you have two or three batteries and a charger.
• Check battery age if buying second-hand – cells degrade and a tired battery will make even a good drill feel weak.
• Consider voltage adaptors only as a stopgap; they add bulk and rarely deliver full performance.

Masonry, Timber and Metal: Getting the Drill and Bit Match Right

Even the best drill will struggle with the wrong bit. Masonry needs a hammer action and a carbide-tipped bit – and remember that hammer mode should never be used on timber or metal, as it chews the material and blunts the bit. Hard brick and concrete may need an SDS drill rather than a combi.

Timber is forgiving and works best at higher speeds with sharp auger, spade or brad-point bits. Let the bit cut; forcing it overheats the drill and splinters the wood. Metal calls for low speeds, cutting fluid and sharp HSS bits. Cobalt bits are worth the extra for stainless steel.

Safety points that experienced hands never skip: wear eye protection when drilling overhead, secure the workpiece, avoid loose clothing near rotating chucks, and never change a bit without removing the battery first. On site, an RCD-protected supply matters for corded tools, but with cordless you simply do not have that cable to trip over or cut through.

Practical Features Worth Paying For

Brushless motors run cooler, last longer and squeeze more work from each charge. A metal chuck grips better than plastic and will not round off under load. Two-speed gearboxes let you choose torque for driving and speed for drilling. An LED work light is genuinely useful in cupboards and under floors.

Hold a few drills before you commit. Balance matters more than spec sheets – a drill that feels nose-heavy will tire your wrist by mid-afternoon. If you can, buy from a supplier who will let you handle the tool, and keep your receipt for warranty claims. A good cordless drill, matched to your work and your battery platform, will earn its keep for years.