Thread Milling Technical Information Tangential Arc Approach With this method, the tool enters and exits the workpiece smoothly No marks are left on the wo

Thread Milling Technical Information Tangential Arc Approach With this method, the tool enters and exits the workpiece smoothly No marks are left on the wo

Thread Milling Technical Information Tangential Arc Approach With this method, the tool enters and exits the workpiece smoothly. No marks are left on the workpiece and there is no vibration, even with harder materials. Although it requires slightly more complex programming than the radial approach (see below), this is the method recommended for machining the highest quality threads Internal Thread External Thread 1-2 rapid approach 2-3 tool entry along tangential arc, with simultaneous feed along z-axis 3-4 helical movement during one full orbit (360°) 4-5 tool exit along tangential arc, with continuing feed along z-axis 5-6 rapid return Radial Approach This is the simplest method. There are two characteristics worth nothing about the radial approach: A. a small vertical mark may be lift at the entry (and exit) point. This is of no significance to the thread itself B. when using this method with very hard materials, there may be a tendency of the tool to vibrate as it approaches the full cutting depth Note: Radial feed during entry to the full profile depth should only be 1/3 of the subsequent circular feed Internal Thread External Thread 1-2 radial entry 2-3 helical movement during one full orbit (360° 3-4 radial exit Tangential Line Approach This method is very simple, and has all of the advantages of the tangential arc method. However, it is applicable only with external threads External Thread 1-2 radial entry with simultaneous feed along z axis 2-3 helical movement during one full orbit (360°) 3-4 radial exit Threading Jm 41