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Introduction to Power Tools

Horizontales
A drill bit that includes steps which enable the user to cut holes in metal to a desired diameter.
A rating that describes the maximum amps a battery can provide continuously for up to 60 minutes. Drawing more amps than the battery’s rating is possible, but it reduces the amount of time before the battery is drained.
A small, T-shaped steel piece used to open and close the chuck on power drills. Cordless drills typically do not have a chuck key.
A substance, such as sandpaper, that is used to wear away material.
The common power supplied to most all wired devices, where the current reverses its direction many times per second. AC power is the type of power generated and distributed throughout settled areas.
Protection against short circuits; a safety device cuts power off as soon as it senses any imbalance between incoming and outgoing current.
A small lever, switch, or part that can be used to activate a locking catch or spring to hold a power tool trigger in the operating mode without finger pressure.
Describe one complete charge and discharge cycle for a rechargeable battery.
The end of a circular saw shaft where the blade is mounted.
A drill bit with a spiral cutting edge for boring holes in wood and other materials.
A drill bit with a carbide tip designed to penetrate materials such as stone, brick, or concrete.
A drill bit that uses a lead screw to pull the larger rear portion of the bit into the wood, making it simple to drill larger holes.
A clamping device that holds an attachment; for example, the chuck of the drill holds the drill bit.
A safety attachment used to prevent whiplashing in hoses when they are inadvertently uncoupled.
Verticales
The rotational speed of a motor or shaft, based on the number of times it rotates each minute.
Moving backward and forward on a straight line.
An electric power supply where the current flows in one direction only. DC power is supplied by batteries and by transformer-rectifiers that change AC power to DC.
A measurement of the power the tool can deliver.
A bit designed for use in wood or similar soft material. The design allows it to drill a flat-bottom blind hole in material.
The channel created by a saw blade passing through the material, which is equal to the width of the blade teeth.
A granular, sand-like material used to make sandpaper and similar materials abrasive. Grit is graded according to its texture. The grit number indicates the number of abrasive granules in a standard size (per in or per cm). The higher the grit number, the more particles in a given area, indicating a finer abrasive material.
A bit or drill used to set the head of a screw at or below the surface of the material.
A very hard material made of tungsten carbide and heavy metals such as cobalt. Commonly baked on to the tips of masonry bits and to the edges of saw blades.
The turning force produced by the drill. As the bit’s turning speed increases, torque decreases, and vice versa.
The smooth part of a drill bit that fits into the chuck.