This section provides an overview for striking wrenchs as well as their applications and principles. Also, please take a look at the list of 8 striking wrench manufacturers and their company rankings.
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A striking wrench is a type of wrench used to tighten bolts and nuts, especially one that can be used by striking its handle with a hammer. Ordinary wrenches are not designed to be used by striking the handle, as the tool itself may be damaged when a large force is applied with a hammer. This could also lead to injury or accident. However, when tightening large bolts and nuts or loosening rusted bolts and nuts, sufficient torque cannot be obtained by human power.
By tying a string or rope to the handle of a striking wrench and pulling it in the direction of the desired rotation while striking the handle with a hammer, it is possible to apply more force than with ordinary human power.
Uses of striking wrenches include work with bolts and nuts that require tightening or removal with a force so strong that normal human power is not sufficient. Specifically, fastening of large bolts and nuts, fastening of bolts and nuts that tend to loosen due to vibration, and loosening of bolts and nuts that have become stuck due to single tightening or rust, etc., are examples of applications of this tool.
Therefore, it is preferable not to use striking wrenches on a part that is frequently opened and closed, or on a part that may be damaged by unnecessary force.
In addition to the size and shape of the wrench part, the material, the shape of the striking part of the handle, and the surface finish are also important in selecting striking wrenches. While striking wrenches can repel large forces by striking with a hammer, there is a risk of inducing defects such as cracks or biting of bolts due to the large load on the bolt/nut and the striking wrenches itself. Therefore, it is necessary to use a product of the appropriate size and shape for the intended use.
Striking wrenches are available in a variety of shapes, such as eyeglass-type and socket-type wrenches, in addition to regular wrenches. For socket-type wrenches, the driver to be used must also be specially designed for impact drivers. Although the materials used have been thoroughly verified for strength, explosion-proof tools should be selected for applications that do not allow sparks from blows. The shape of the impact portion is also a matter of weight and work location, but selecting a large, box-shaped tool will prevent accidents caused by swinging.
Furthermore, since striking wrenches are used by repeatedly hitting them with a hammer or the like, the surface easily deteriorates, causing rust and corrosion. Although products with surface treatment such as cationic electrodeposition coating or manganese phosphate treatment are relatively long-lasting, if they are damaged during use, it may lead to serious injury or accident.
*Including some distributors, etc.
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