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Milling aluminum at 0.1″ (2.54mm) depth of cut

It’s been awesome to see what users on the Sienci Mill One Group on Facebook have been up to, especially with the mods that they have been making to improve the performance of the Mill One, as well as pushing the machine to its furthest extents. One example of this is Eddie’s latest endeavour to cut aluminum at 0.1″ or 2.54mm depth of cut at 5 in/min (127mm/min) to 8in/min (203mm/min) with a 3/8″ (9.525mm) end mill.

While the feedrates are fairly slow, it’s cool to see the Mill One taking substantial chunks of aluminum out per pass. Based on some quick calculations on, Eddie was able to achieve a material removal rate nearly 10x higher that with a 1/8″ bit at 0.1mm depth of cut at 1000mm/min.

You can see in this video where Eddie is making some chips and get a sense of what’s going on in the machine. Also, make sure to note some of the unique mods he’s made.

With the improved rigidity made to the Mill One V2 coming soon, we look forward to seeing how much further folks will be able to take the Mill One and test the limits of the design.