While this type of broaching is also external, it is a distinct category from external form broaching because of its unique process. This type of broaching is used when an external form is required. The form can be splines (straight sided, involute, angular), cam, or lobular.

In a pot broaching set up, the part is usually pushed up through an internal 'pot'; a fixture that houses a series of form inserts. Some pots also include a sequence of shave rings that are mounted at the rear of the broach inserts and are used to enhance the form, spacing, and finish of the resultant part.