{"id":162972,"date":"2021-03-25T10:43:17","date_gmt":"2021-03-25T02:43:17","guid":{"rendered":"http:\/\/facfox.com\/docs\/?post_type=kb&p=162972"},"modified":"2021-06-28T15:17:01","modified_gmt":"2021-06-28T07:17:01","slug":"threading-considerations-for-cnc-machining","status":"publish","type":"kb","link":"https:\/\/facfox.com\/docs\/kb\/threading-considerations-for-cnc-machining","title":{"rendered":"Threading Considerations for CNC Machining"},"content":{"rendered":"

Incorporating threads in your parts<\/a> can sometimes be the ultimate undoing of your assemblies. There are a lot of design rules and the precision needed to manufacture threads is substantial. Beyond that, these features require a bit of extra thought and care to ensure that they work as designed. Get them right and the assembly could last for years. Done wrong and you\u2019re in for a world of hurt.<\/p>\n

External vs. Internal Threading<\/h3>\n

This is pretty basic, but important. An easy way to remember this difference is that you’ll find external<\/em> threading on screws and bolts\u2014it\u2019s external<\/em> to the hardware. Internal<\/em> threads reside inside the main part. They accept, and lock in, screw and bolt threads. You\u2019ll find more details on external and internal threading later in this design tip.<\/p>\n

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Thread Pitch<\/h3>\n

When we talk about threads on bolts and screws, it\u2019s not a one-size-fits-all kind of scenario. In addition to metric threads, there are three primary kinds of imperial measure threads that are part of the Unified Thread Series.<\/p>\n