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Anonymous users2024-02-06The left and right rotation of the thread is used to connect and fix. According to the different spiral rotation directions of the thread, the thread is divided into two types: right-handed thread (also called ordinary thread, widely used), its tightening law is "tight and loose", which is used for most threaded connections; The left-handed thread (also called special thread, less used), its tightening law is "loose and backward", which is used for threaded connection on special occasions.
For example, the joint of the gas cylinder (gas is a flammable and explosive gas, in order to prevent children from inadvertently twisting, according to the natural habit of wanting to unscrew, according to the reverse time direction to screw, if the right-hand thread is used, it may be unscrewed, but it is a left-handed thread, which is tighter and tighter, and plays a role in safety protection. ), flywheel threads for bicycles, etc. The direction of rotation of the thread is specified:
The screw is vertical, and the thread line (to enlarge it to see more clearly) from the left to the right is called a right-handed thread; Otherwise, it is called a left-handed thread.
Addendum: The left and right rotation of the thread is selected for work needs (fixed connection), safety and prevention of accidents, etc., not for ease of installation and anti-loosening requirements. In a machine, a rotating object (part) naturally has to take into account its turning.
Because, its steering has to meet the requirements of working by the machine.
Supplement: Generally, anti-loosening parts need to be added to rotating threaded parts.
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Anonymous users2024-02-05The easiest way to do this is to turn in a clockwise direction that is right-handed, and counterclockwise is left-handed.
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Anonymous users2024-02-04There are 3 ways to judge the left and right threads;
1. Looking at the direction of rotation, the thread is divided into left-handed and right-handed threads. The thread that is screwed in when rotated clockwise is called a right-handed thread, and conversely, the thread that is screwed in when rotated counterclockwise is called a left-handed thread.
2. Put the thread or screw perpendicular to the horizontal plane, you can see that each thread is oblique, if the right side is high, the thread is right-handed. If the left side is high, the thread is left-handed.
3. The thread screwed in when rotating counterclockwise by hand twisting method is called left-handed thread, and conversely, the thread screwed in when rotating clockwise is called right-handed thread.
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Anonymous users2024-02-03Both the left and right threads are closely related to the safety of people's lives. The left thread is closely related to the safety of people's lives, and everything has a life safety for people's lives is the left thread, such as: water, simple skin gas.
And the right thread is no safety hazard to human life.
It is also a commodity for daily use.
Several distinctions
1. The position of the thread rotation is different.
Left-hand threading, when the part is placed vertically along the axis, the left end of the thread is higher than the right end. The right-hand thread and the right-hand thread are higher than the left-hand end.
2. The direction of rotation is different.
Left-handed thread, a thread that is screwed in when rotated counterclockwise. Right-handed thread, the thread that is screwed in when rotated clockwise.
3. The thread inclination is different.
1) Left-handed thread, place the reed chain thread vertically along the axis, you can see that the thread has a certain angle of inclination. If the left side is higher than the right side, it is a left-handed thread.
2) Right-handed thread, when the right side is higher than the left side, it is a right-handed thread.
Related Extensions
Generally, the thread is right-handed, because it is in line with people's habits, just like the hands of a clock are turned to the right. The left-handed thread is used less but is also indispensable, has a certain effect, the more commonly used left-handed thread is used more on the rotating shaft, the general shaft rotation is accompanied by the sun are rotated to the right, like some pumps, motors, fans, etc. in these shafts as the left-handed thread used to tighten all kinds of impellers, when the impeller rotates, it has an inertia force that rotates to the left relative to the tightening nut.
If it is a right-handed thread, it will loosen the tightening of the mother, which will cause the impeller to loosen and damage the equipment. This force is particularly prominent when the machine is switched on and off or when the speed changes greatly, so the left-hand thread is selected to turn tighter and tighter.
There are also some poles on the cable-stayed line of the orchid bolt on the left-hand thread is also more, one end is left-handed, the other end is right, the nut in the middle can adjust the tightness of the cable.
There is also acetylene gas in industry.
The threads on the pressure reducing valve are also left-handed, which serves as a warning to draw attention to the danger of mixing with oxygen.
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Anonymous users2024-02-02The direction of rotation of the internal thread is the same as that of the external thread. The thread screwed in when rotated clockwise is right-handed thread, and conversely, the thread screwed in when rotated counterclockwise is left-handed thread.
Common screws and bolts, if not stated, are right-handed.
This is the principle of ergonomics, with the axis as the reference system for the speed direction of the right-hand rule to follow the right-handed rule, more than 90% of people are right-handed, so that most people are convenient to use.
The right-hand screw is suitable for the physiology of the right hand and is therefore implemented as a standard specification.
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Anonymous users2024-02-01Generally speaking, there are two types of thread rotation, namely: positive thread (right-handed) and reverse thread (left-handed).
The most common thing in life is the left and right pedal threads of the bicycle
Left rotation]: The left foot side is "left-handed" (usually represented by the letter "L" on the pedal, and the machinery industry will also use "LH" to dedicate), counterclockwise for screw-in, clockwise for screw-out;
D-rotation]: The right foot (crankset) side is "right-handed" (usually represented by the letter "R" on the pedal), clockwise for screw-in, counterclockwise for screw-out.
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Anonymous users2024-01-31The meaning and code of the large, medium and small diameter of the internal and external threads.
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