142f black oil

very hard to get the involute correct , especially on small sizes. i have used a template with a pantograph mechanism to scale it down somewhat, but yikes, is it slow and tedious!

now i can make some little boxes with a couple of various ratios...main intention is to make a hobbing machine, then i can cut spiral/helicals easily. software wont cut them with a saw style cutter :( shaped endmill only for spirals.


hmmms... it worked...flawlessly :)

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