In the sealing mechanism, tungsten carbide 55-tapered-pipe-thread-tap, with its unique sealing effect, are widely used. But in machining, the parameters listed in the various manuals, without exception, to the base surface is given in a standard size.

This abstract dimension, both in the actual processing is difficult to measure and difficult to control, resulting in the processing of the thread will vary and reduces interchangeability. Tungsten carbide 55-tapered-pipe-thread-tap are in the assembly, not the song is tight, not difficult to install, but also seriously affect the sealing performance. By now translated, with precise, habitual use of lip dimension to replace the complex base size, not only more convenient processing, and significant progress in tungsten carbide 55-tapered-pipe-thread.

 

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Tungsten carbide 55-tapered-pipe-thread-tap has a large number of types and sizes. Let’s see the followings:
 

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Tungsten carbide ladder-shaped-thread to be processed, to start with, the processing time of the rectangle, just to try to make the size of the processing to eight points. A thread of a rectangular feed only about 0.05 ~ 0.1mm. But deep trench, it will take a lot of time. While machining the teeth side of the feed 0.05mm, there will be an angle of 30 degrees.

Scale readout = 0.05mm * cot15 degree
= 3,732 ≈ 0.2mm * 0.05mm

It will produce four times the original amount of chips. In other words, the same chip, because the thread lead angle, the movement of the cutting edge length becomes longer, the chip will be thin.

Tungsten carbide ladder-shaped-thread is mainly used for feeding device, the thread is basically for a softer non-ferrous metals. Especially brass, bronze, chips can be well drained from the outset with the form tool linear feed can be.

 

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Generally, the tungsten carbide ladder-shaped-thread is bigger than the triangle’s, so cutting capacity is much, and the feed screw triangle method is different. According to the basic tooth type tungsten carbide ladder-shaped-thread-taps, with a bottom width of the rectangular teeth begin processing thread turning moment tooth width table thread.

Compared to the width of the teeth at the end of the larger rectangle with the general thread, so people need to take a good angle.

Secondly, with the basic tooth type matches the turning tungsten carbide ladder-shaped-thread-taps flank both sides of finishing. Order processing flank, tungsten carbide ladder-shaped-thread-taps’ teeth will increase, a force when turning machining on both sides too, so side to side processing.

 

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There is centering degree of tungsten carbide ladder-shaped-thread-taps, so the thread is large. Therefore, to use a feed device with high precision. Screw machine and other machine tools used in the feed screw, almost all tungsten carbide ladder-shaped-thread-taps.

There are 30 degree tungsten carbide ladder-shaped-thread and 29 degree tungsten carbide ladder-shaped-thread, can be processed into a predetermined angle turn. 30 degree of pitch with tungsten carbide ladder-shaped-thread-taps, said 29 degree tungsten carbide ladder-shaped-thread according to the number of teeth to represent 1in.

 

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Darts was caught up in the high-tech materials revolution, and nickel-tungsten darts soon became ubiquitous. Before the age of Internet shopping, hundreds, perhaps thousands, of darts shops opened worldwide to provide a growing range of darts supplies to darts enthusiasts.

Dozens of darts equipment manufacturers, both large and small, provided a vast array of merchandise to these new shops. In the early years of the 21st century, the industry consolidated, became much more competitive, and many of these pioneer darts companies went out of business.

Technology continues to influence innovation in darts, as seen in the recent trend towards highly milled textures and finishes on darts barrels. Many of these new designs would have previously been very difficult, and certainly very expensive, to create. Computer controlled machining centers have now become affordable for even small factories, and these machines can repeatedly duplicate incredibly precise machining projects.

It seems likely that darts designs will continue to evolve along with the materials and technology used to make them.


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Tungsten carbide lo pointed tap has no chip clogging, sharp chip performance, high-speed machining and large flexural prevention and etc.. Look at the table in details.
 

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The new ultra-dense sintered nickel-tungsten material was revolutionary. It allowed production of new thinner darts, which in turn allowed darters to place their darts closer to each other, greatly increasing the likelihood of high scores such as 180's.

The new tungsten material was also more durable and resistant to corrosion, unlike brass darts that would quickly wear down and lose their machined grip. The sharp machined grooves of an N/T dart stayed gripping for much longer, which led to generally more precise manner of throwing. Highly textured tungsten barrels could just rest on the darter's finger tips instead of requiring the stronger squeeze often needed with the more slick brass darts.

Thin, streamlined darts made of dense tungsten soon displaced traditional brass to become the standard for competition, and manufacturers raced each other to introduce novel barrel designs. As the new high-tech darts commanded higher prices than traditional brass darts, the darts industry grew rapidly, and as part of their promotions began sponsoring major tournament and "pro" players.


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To darters, the 1970s was a time of explosive growth for darts. Promoters organized new leagues, publicized regional and national tournaments, and heavily marketed new darts products.

The decade was also a period of relative peace and prosperity for most of the Western world, after the end of the Vietnam War. That prosperity meant that people could spend more time on leisure activities, and sports & recreations of all types built large followings, including darts.

Much of the new interest could be attributed to the development of darts made from ultra-dense tungsten, along with the darts industry that developed to make and market the new darts.

In the 1970's, there was some production of "tungsten darts", but they were often made of a much softer blend of copper & tungsten, a fairly common industrial material at the time.


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Tungsten carbide extrusion tap can use the principle of working within the plastic thread and has no chip discharge. Look at the table in details.
 

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