Why are nuts all hexagonal?

September 22, 2022

Why are nuts all hexagonal?

From the perspective of rotation, a regular quadrilateral is the best in theory, but the rotation angle of each operation must be slightly larger than 90 degrees, and the actual operation space may be limited and cannot rotate 90 degrees, so choose a smaller rotation angle;

From the point of view of the use effect, the regular octagon can also be used in theory, but the edges and corners of the nut and the wrench do not cooperate well, and it is easy to slip off when the force is applied, so it cannot be used;

Practice has proved that the regular hexagon is the most suitable, and the operating angle is greater than 60 degrees, and the edges and corners will not slip off.

In addition, the hexagonal shape of the nut is mainly for ease of use and maximum utilization of materials. On the machine, the place where the nut is installed is sometimes not quite generous, and the movement of the wrench for tightening the nut is very limited. Hexagonal nut, only need to turn the wrench 60 degrees at a time. You can slowly tighten the nut. The four corner nuts need to be turned 90 degrees each time. That is to say, in order to tighten the nut, the hexagonal shape is smaller, but the octagonal nut is easy to slip due to the small contact surface between the wrench and it, and is usually rarely used, so the hexagonal nut is the most convenient to use.

Nuts are generally milled from round materials. The same round bar is used to make a hexagonal nut with less metal cut than a square nut. Therefore, a hexagonal nut made from a round bar of the same thickness is far Larger than a square nut. Generally speaking, in terms of strength, large nuts are always stronger than small ones, that is, to maximize the use of raw materials.

Looking at the wrench again, the handle and the wrench of a common wrench can be at an angle of 30 degrees, so when the place where the nut is installed is very narrow and the wrench cannot move freely, just turn the wrench on a nut, and then turn the wrench over. Come over and tighten the nut again, so that you can tighten the nut by twisting it back and forth a few times. Nuts have two shapes, one is hexagonal, which is widely used, and the other is regular quadrilateral, which is mainly used for fixing with wooden structures. This situation rarely occurs, but there are, generally do. The hexagonal shape is because when the nut is screwed in this way, in the case that the wrench cannot continuously turn the nut due to the limited structure, the wrench only needs to be screwed through at least 60 degrees each time, while the regular quadrilateral needs 90 degrees, which is structurally prefabricated for the wrench. The space left will be increased, and the regular octagon is as mentioned above, and it is easy to damage the edges and corners of the nut, making it impossible to move it anymore, and the odd-numbered regular polygons are difficult to use a wrench to move, only a socket can be used. It is inconvenient to pull it, and it will be limited by some structures.

To sum up, the hexagonal nut is the most convenient to use, and the design of the hexagonal nut is also more suitable for the needs of installation and tightening, so that the worker can find the occlusal surface without special care when putting the wrench on the nut, which greatly improves the work. efficiency.

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Author:

Mr. Johnson Zhang

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