Internal Chamfering with a Ball End Mill

Here are some free images from a job where we used an additional axis (indexer) on a vertical machining center to perform chamfering on the inside of a cylinder using a ball end mill.

By combining a 4-axis machining center with a ball end mill, it becomes possible to achieve cylindrical internal chamfering, which is difficult with conventional machining.

Due to the unique combination of cylindrical and spherical shapes, the cut can sometimes be deeper than the data setting. Therefore, the key is to set the initial chamfer size smaller and gradually approach the final desired size.

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