Here it is... 1 mm pitch groves.
Aluminium I had is not very good for machining, it is pretty soft and sticks to cutting tool despite lubricating with WD40.. but should be OK for a test.
Quote:
Originally Posted by oska
This Old Tony has a tutorial on YT to cut large bore threads with a tap as a cutting tool (not as a tap) and lathe, only the pitch matters not the diameter. You will have to fiddle the gearing though.
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Yep, tap, being a tap for threading has an angle.. but if I could compensate for this in holder, there should be no lathe gears involved.. because I need only groves, not a thread.
Anyway.. there are not many groves to cut so...