Electric screwdrivers
or her spouse who rivals are one of the most into the market for many different
types of work. Electric screwdrivers are use on all industrial and
technological manufacturing and repairing. Electric screwdrivers serve
different purposes and always been proven to be highly handy.
An Electricscrew driver is a tool, manual or powered, for screwing and
unscrewing (inserting and removing) screws. A typical simple Electric
screwdriver has a handle and a shaft, ending in a tip the user puts into the
screw head before turning the handle. The shaft is usually made of tough steel
to resist bending or twisting. The tip may be hardened to resist wear, treated
with a dark tip coating for improved visual contrast between tip and screw—or
ridged or treated for additional 'grip'. Handles are typically wood, metal, or
plastic and usually hexagonal, square, or oval in cross-section to improve
grip and prevent the tool from rolling when set down. Some manual Electric screwdrivers
have interchangeable tips that fit into a socket on the end of the shaft and
are held in mechanically or magnetically. These often have a hollow handle that
contains various types and sizes of tips, and a reversible ratchet action
that allows multiple full turns without repositioning the tip or the user's
hand.
An Electric screwdriver is classified by its tip, which is
shaped to fit the driving surfaces—slots, grooves, recesses, etc.—on the
corresponding screw head. Proper use requires that the Electric screwdrivers’
tip engage the head of a screw of the same size and type designation as the Electric
screwdrivers tip. Electric screwdrivers tips are available in a wide variety of
types and sizes (List of screw drives). The two most common are the simple
'blade'-type for slotted screws, and Phillips, generically called
"cross-recess".
A wide variety of power Electric screwdrivers range from a
simple 'stick'-type with batteries, a motor, and a tip holder all inline, to
powerful "pistol" type VSR (variable-speed reversible) cordless
drills that also function as Electric screwdrivers. This is particularly
useful as drilling a pilot hole before driving a screw is a common operation.
Special combination drill-driver bits and adapters let an operator rapidly
alternate between the two. Variations include impact drivers, which
provide two types of 'hammering' force for improved performance in certain
situations, and "right-angle" drivers for use in tight spaces. Many
options and enhancements, such as built-in bubble levels, high/low gear
selection, magnetic screw holders, adjustable-torque clutches, keyless chucks,
'gyroscopic' control, etc., are available.
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