Handle spanner knowledge guide:
What is a handle spanner? It is a hand tool that uses a lever principle to twist bolts, screws, nuts, and other threads that hold the opening or socket firmware of the bolt or nut. The handle spanner usually has an external force applied to the one end or both ends of the handle, and an external force is applied to the opening or the sleeve hole of the bolt or nut. When using, apply an external force to the shank in the direction of thread rotation to twist the bolt or nut.
Several types of wrenches commonly used:
1. Wrench
One or both ends are provided with fixed-size openings for twisting nuts or bolts of a certain size.
2. Wrenches
The working end has a hexagonal hole or a twelve-corner hole at both ends, which is suitable for the occasion where the working space is small and the ordinary wrench cannot be used.
3. Combination wrench
One end is the same as the single-head wrench, and the other end is the same as the wrench, and the bolts or nuts of the same specification are screwed at both ends.
4. Adjustable wrench
The width of the opening can be adjusted within a certain size range, and the bolts or nuts of different specifications can be screwed.
5. Socket wrench
It is composed of a plurality of sleeves with hexagonal holes or twelve-corner holes and is equipped with various accessories such as handles and posts. It is especially suitable for turning bolts or nuts with very narrow position or deep depression.
6. Allen wrench
The L-shaped hexagonal bar wrench is designed to twist the hexagon socket head cap screws. The model of the Allen key is in accordance with the size of the opposite side of the hexagon. The size of the bolt has the national standard.
7. Torque wrench
It shows the applied torque when the bolt or nut is turned. Or when the applied torque reaches the specified value, a light or sound signal is emitted. Torque wrenches are suitable for assembly work where the torque is clearly specified.
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