key
Wrench (tool)
We recognize several types of keys based on their construction. The basic division is into outer and inner n-edges. Some keys consist of several interchangeable parts - they use a basic lever and a socket head of the appropriate size. Additional accessories are often supplied with the heads (extension rods, joints, flexible extensions, ratchets...). 12 mm Gola is most often used.
A wrench is a tool primarily designed for tightening and loosening (screwing) screws and nuts. The basic principle of any wrench is a lever (force concentrator). The shape of the key purposefully depends on the shape of the screw head (nut...).
The basic shape used in technical practice is the hexagon (hexagonal screw and nut) internal and external. Triangular, quadrilateral, octagonal (star) and dodecagonal (asterisk) are used less often.
Allen wrench (n-hex)
fork wrench - side
Open-end wrench - straight
ring spanner - closed
socket wrench extended.
- open-end wrench – a combination of open-ended and open-end wrench
- socket wrench (Gola) - popular (Walnut)
- pipe wrench
For internal hexagon (n-edge)
bits for the inner n-edge
bow tie
eccentric triangle
square
hexagon hexagon, hollow hexagon
star 6-point (torx), 12-point, hollow torxNastaviteľné kľúče a univerzálne kľúče
- french key
- referred to as a spanner, but it is not a spanner
- pipe wrench
Special keys[
Throughout history, a vast number of purpose-built keys have been created for a variety of uses.
spoke spanner (bike)
- derailleur key (bicycle)
center hub wrench (bicycle)
- tap wrench
- barrel wrench
wheel wrench (cross)
wrenches with torque measurement
-
pipe wrench clef (piano) oil filter wrench spark plug wrench (car) fire hydrant key rail spanner scythe wrench
impact wrench
-
electrician's flat key
- flat nut wrench
- two-handed T wrench
- impact wrench
and many others ...