![]() ![]() (Note that this is the UK model with a 230 volt charger). Impact drivers have a hex socket rather than a standard chuck and this accepts impact rated screwdriver bits/bit extenders or drill bits with a hex shank (suitably rated to withstand the impact torque) These are primarily used for driving long or heavy gauge screws in tougher timber, faster than a standard cordless drill would be capable of doing. For more information on this, see my guide, "What are the Settings for on a Cordless Drill?" This ensures that the chuck will slip when a preset twisting force or torque has been applied to a screw, preventing the screw from being over-driven into timber. 14.4 or 18v is a good compromise.Ĭordless drills have various torque settings. ![]() However, the downside of higher voltages is a heavier drill. Higher voltage means more power and torque for drilling larger diameter holes. Cordless drills are available with battery voltages from 10.8 to 36 volts. Combi drills have a hammer action function which facilitates drilling of holes in masonry. How it works: Cordless drills usually have either a 3/8 inch (10mm) or 1/2 inch (13mm) hand-tightening chuck. For more info on cordless tools, see the section at the bottom of this article. ![]()
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