CNC ring making machine.
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Previously:
https://www.homemadetools.net/forum/...363#post231110
https://www.homemadetools.net/forum/...777#post178908
https://www.homemadetools.net/forum/...474#post142841
https://www.homemadetools.net/forum/...911#post133620
https://www.homemadetools.net/forum/...593#post222999