b'H R E A D I N G A WE T HI V I RG LGenevieveSwissIndustriesThread whirling is a productive way to quickly make certain thread forms.By Yesenia Duran other microcomponents.Swiss-style CNC machines use thread whirling to A lthough similar to thread milling, thread whirlinggenerate complex, complete thread forms that nor-has inserts mounted on the inside of a cuttingmally would be difficult to produce efficiently in high ring, or cutter holder, rather than on the outside of avolumes. Thread whirling is a milling process used pri-milling tool. The thread whirling ring rotates around amarily for thread forms that require large amounts of cylindrical component to cut a thread in one pass. removed material, such as medical buttress threads A productive method often used for thread forms that need to be produced quickly and at tight toler- Shown above is a typical arrangement of cutting inserts in a thread ances, typical parts for thread whirling are medicalwhirling ring, which affixes to the dedicated live tooling attachment bone screws, implants, feed screws, worm gears andused to perform the process.38JULY 2021 Threading.indd 38 6/17/21 11:30 AM'