Percentage of thread and tap selection:
Many variables affect the performance of threads and the faucet used to generate them. A very important factor is the size of the drill used to generate the hole that will be mined. Most of the taps are only about the size of a drill bit, which will produce about 75 percent of the threads. Generally speaking, using a lower thread can significantly improve the service life of the tap tool, and we recommend using 60% to 70% of the value in most applications. The percentage of thread strength is not directly proportional to the percentage of threads. For example, 100% thread specification is 5% better than 75% thread specification, but requires three times the torque to be produced.
The metric thread of ISO is the same as the 60 degree line of the UN thread, but the diameter and pitch are not interchangeable. The gauge drill table has the same drill size problem because they use the same formula as the discarded threads. In the ISO and UN thread series, there are a series of useful drills that allow designers and mechanics to adjust the effective thread depth for long holes, various materials and thread strength requirements. It also allows the combination of inches and metric taps and drills to operate easily.
Main material organization P
This group includes the long chisel black metal
Stainless steel and Austin steel, according to
Reduce the load by dividing the application group into 01-50.
Main material M group
Group M includes Austin’s stainless steel, Austin’s
Ferritic steel and cast steel. This group is subdivided into
The application group 0-40 depends on the cutting
Load. In company, P and M applications
K coated hard alloy.
Major materials group K
Group K combines all forms of grey cast iron
Malleable cast iron. Rely on reducing load
The application group is subdivided into 01-40.
The age of the main materials group
A heat-resistant “super alloy” based on iron, nickel or nickel
Cobalt and titanium alloys are included in the group.
An application group divided into 0-30 depends on
Main material N
This group includes non-ferrous metals, especially aluminum alloys
And non-metallic materials. It depends on the
Cutting load is divided into application group 01-30.
The main material of group H
This group includes hard – steel hard – steel.
The application group is 01-30, depending on
Many levels of carbide cover major components
Material group, especially the application of coating tools.
For example, most carbonized carbide bits are in
The company range is allocated to the main material group K And P.
Individual diatomaceous earth performance
The following table lists the most important
Applicable to general applications.
Further carbide grades may be provided as required.
Details can be found at www.gueh roundabout.
In more than 80% of applications ,company,
Dk460, the result of the carbide level tool
The specially adapted coating cannot be surpassed by anyone
Other levels of carbide, including coating tools. This and
Pre-material inventory simplifies tool selection for availability