7/26/2023 0 Comments Cordless drillThis is approximately twice as strong as steel, and better able to withstand heavy-duty drilling. If you’re working with extremely hard materials, such as concrete, paving slabs or metal, make sure your drill bit is tipped with tungsten carbide. It's sometimes also called impact drilling mode. Hammer-action mode – exclusive to combination drills, a hammer action uses short, rapid thrusts to ‘hammer’ hard material such as concrete, resulting in quicker drilling with less effort.Rotary-drilling mode – a mode all drills use to bore holes.Screwdriving mode – a mode all drills use to screw slowly and effectively.Gearsĭrills with two gears tend to be best for slow, controlled screwdriving. Brushless drills are more expensive, though. Benefits include a higher power-to-weight ratio, higher speed, and greater electronic control. Brushless motorĭesigned to reduce friction and resistance. Most drills lock automatically when the speed control is released, but some manual models require you to slide a switch into the central position to ensure that the bit has been securely attached to the chuck. Torque settings are most important when it comes to screwdriving, as too much power can strip the screw head. The maximum torque is the maximum rotary turning force of the drill, which can be important if you will be drilling into tough materials such as masonry – for which you should consider a combination drill, with the extra force of a hammer-action function. Most cordless drills have a chuck size of either 10mm (3/8 inch) or 13mm (1/2 inch). The chuck is the hole into which you slot the drill bits, or other accessories such as rotary sanders or wire-wheel brushes.
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