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If your machine is capable of three-axis (helical) interpolation, you can utilize thread milling. Basic programming of a one pass thread mill can be achieved in six basic steps. The following are examples of how to calculate and program a 7/16-20 right-hand thread that will be 1/2 deep produced in one pass.
The thread milling operation is based on three-axes simultaneous movement so the profile shape on the workpiece is not a copy of the insert profile. In other words the profile is generated and not copied which is contrary to the thread turning operation.
The diagram below shows the working area for a CNMG 120408 insert, based on acceptable chip breaking in relation to feed and depth of cut. • First choice is -PM geometry • Use -PR geometry for high f n/a p or interrupted cuts • Use -PF geometry for low f n/a p. The chip illustration is an example from the diagram and cutting data ...
Very few machine operators understand how the thread is intended to work, let alone the varied challenges in creating these threads in different materials and applications. This manual provides an overview of NPT threading and the variety of tools and process available to create this thread type.
International standards for thread forms have therefore been established for all common thread types. Below are examples of Metric, UN and Whitworth thread designations. ISO metric thread designations The complete thread designation is made up of values for the thread form and the tolerance.
• Thread form is defined in DIN 513, 2781, 20401, 55525 and 6063. • This thread is mainly used in industrial applications for presses or hoisting systems. Source: Roloff, Matek; Maschinenelemente, 2007
12 Thread forming 13 Thread milling 14 Product information 14 Thread tapping 28 Thread forming 34 Thread milling 40 Tool selection 40 Thread tapping 44 Thread forming 46 Thread milling 48 Technical information 48 General 74 Thread tapping 94 Thread forming 101 Thread milling ...
