Page 187 - Threading_Handbook

3.6 Indexable Thread Milling Tools vs. Solid Tools

The range of capabilities of thread milling tools can be increased significantly by using
indexable inserts. The indexable inserts can be made of various alloys. Selection of a
suitable insert depends on a variety of factors: cutting parameters, thread form, and the type
of cutting material. Indexable inserts are characterized by the following advantages: THREAD MILLING

• Quick change of cutting edge - If the cutting edge is damaged or worn, it is
not necessary to replace the whole tool, but just the cutting part (insert).
• Wide range of capabilities - By changing inserts, a variety of threads in various
materials can be produced using one tool only.
• Low cost – Using inserts can significantly reduce costs since the insert is
cheaper than a solid tool.

Solid tools are advantageous when it comes to small tools. The main advantages
of solid tools include:

• More productivity - The number of cutting edges that can be placed in solid tools for small
and medium diameters is greater than the number of inserts that can be mounted in small
and medium tools, which causes higher productivity.

• Internal threads in small diameters – Internal threading in small diameters (less than
Ø9.5) is not possible with indexable inserts, but only with solid tools.

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