Impact drills
— a special mode designed to improve the efficiency and/or productivity of the tool. The specific meaning of this mode depends on the type of instrument (see "Device"). So, in drills, blows occur along the axis of the drill with a very high frequency — several tens of thousands per minute; this is useful when working with dense materials, as well as in situations where the highest possible drilling speed is required (however, it is worth noting that such a drill cannot replace a full-fledged rotary hammer). In screwdrivers and wrenches, it would be more correct to call the impact mode pulsed: in this format of operation, the tool nozzle does not rotate uniformly, but in separate jerks, usually at a frequency of about 3K per minute. It also improves work efficiency, which is especially useful when driving self-tapping screws into dense material and unscrewing old, “stuck” fasteners.
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