The more Amp-hours on the same voltage, the longer your battery should (theoretically) last. Each battery has a voltage (usually 12V, 18V or 24V), along with a capacity in Ah (Amp-hours). The good news is that most cordless drills now use lithium-ion batteries, which hold their charge well, even when not in use, and can be recharged at any time. The biggest disadvantage of using a cordless drill is that it needs to be charged before you can get to work. Two-mode models only allow you to choose between rotary-only and combined rotary/hammer action, whereas three-mode models also add the option of hammer-only action, which makes it possible to use them with chisel-type attachments for demolition duties. These drills come in three main types: two-mode, three-mode and three-mode with an interchangeable chuck. The SDS-specific drill and driver bits have small indentations at the rear where they slot into the drill (no chuck key is required so this takes seconds), and ball bearings in the SDS chuck hold them securely in place while hammering the bit back and forth. SDS drill: Also known as SDS rotary hammers, these are normally bulkier and heavier than standard hammer drills, but are designed for more heavy-duty DIY jobs where power is paramount. However, they’re generally not as powerful as the SDS drills below, are much noisier and don’t often have the capability to be used in a hammer-only mode with chisel bits. That power results in a bigger, bulkier drill that’s more capable than combi drills, but they also tend to cost more than their basic counterparts. Hammer drill: These use a more powerful forwards and backwards hammering action in combination with the spinning drill bit to strike through the toughest masonry or stone. They’re pricier than standard drill drivers and not as powerful as a high-end hammer or SDS rotary hammer, though. These cope with basic everyday drilling and screwdriving tasks, but often offer improved torque for more demanding jobs and also add a basic hammer function that can break through harder materials. This can seriously save you time and effort when you’re working on a major project.Ĭombi drill: If you need to drill into tougher materials such as metal or concrete, and also drive screws, your first port of call should be a combi drill. On softer wood or where there’s less precision needed, you might even be able to get away without the pilot hole. Where you might need to drill a hole for screws with a traditional drill, then swap between drill and driver bits, you can get away with a smaller pilot hole then use the impact driver to drive the screw in. They normally use hex-shank driver bits, and while you can theoretically use specific impact-ready drill bits (standard drill bits may break due to the combination of rotation and concussive force), this isn’t what they’re designed for, and they’re not as suited to millimetre-precise jobs. They’re traditionally much more compact than the other tools here, and since there’s no back-and-forth motion (unlike hammer and SDS drills), they’re also less hard on the wrists. Impact driver: These might look like a standard drill, but impact drivers are specifically designed to drive screws, not drill holes – they use a combination of huge spinning torque and percussive blows against the back of the driver bits to power screws into the toughest surfaces. They will struggle with tougher jobs, however, as they don’t have the powerful motors or high-torque designs of the other tools below. They’re lighter than the more powerful drills below, which makes them more manoeuvrable for awkward-to-reach jobs. The most common type of drill, these can be used to drill holes in everything from walls to wood to masonry, and drive screws, too. Below, you’ll find a quick summary of the main types and how they differ from each other.ĭrill driver: If you want a no-frills drill you can use for a variety of tasks around the home, consider a drill driver. There are quite a few different types of drill out there, most of which look pretty similar to the untrained eye. How to choose the best cordless drill for you What type of drill should I buy?
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