Cutting oil scroll groove?

Laverda · May 17, 2018

I have a 13/16" diameter shaft made from 8620 (not hardened yet) that needs a oil groove cut in to it. It is .75 TPI for 3 inches. My lathe only goes down to 4 TPI. Other than doing it by hand with a file or perhaps a Dremel tool, I am out of ideas???

Looking across the shop I don't see how my mill or shaper could do it either. :scratchchin:

HuFlungDung · May 17, 2018

Functionally, it doesn't need to be a spiral at all. You could cut a shallow round bottom groove at each extent (or wherever the fill hole is), and then join with a axial groove.

henrya · May 17, 2018

How fast will the power feed run? You could try it out with a Sharpie in the tool post to see if it might work.

SteveBausch · May 17, 2018

How often is this needed?

You should be able to adjust the gear quadrant (make leadscrew 5.3 time faster when set to 4 tpi)

Don’t engage motor, don’t drive with cheater bar on chuck.

Drive the leadscrew directly, or as close to directly, by hand.

Set up a dremel/die grinder/ router to a carbide bit, not a stone.

Cover up the ways, use a shop vac to immediately suck up the chips.

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Cutting oil scroll groove?

Laverda

Cast Iron

HuFlungDung

Diamond

henrya

Titanium

SteveBausch

Stainless

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