While doodling a drag knife holder for the Sherline, I figured a 3/8 inch shaft would hold all the parts and fit neatly into a standard Sherline tool holder, which it did:
Having recently upcycled a 3/8 inch shaft from the Thing-O-Matic into a pen holder for the CNC 3018-XL, I cut off another section with an abrasive wheel, then tried to face it off:
Although the mini-lathe’s carbide insert gnawed at the shaft’s case-hardened shell, it obviously wasn’t making much progress against that step.
Back to the abrasive cutoff saw:
Which looked better, although it still wasn’t quite perpendicular to the shaft axis.
Back to the lathe:
Well, it’s better, but it sure ain’t pretty.
Put gently, the mini-lathe’s lack of rigidity doesn’t help in the least. The compound was a-reelin’ and a-rockin’ on every revolution and eventually turned a slight tilt into a distinct radial step.
Memo to Self: Dammit, use a brass rod!
7 thoughts on “Mini-Lathe vs. Case-Hardened Shaft”
Yeah, I am not thrilled with the mini-lathe. Every time I ask it do do something I need (meaning steel as opposed to something I want which can usually be plastic or non-ferrous) it falls insufficient in my admittedly unskilled hands. I’ve been thinking a lot about one of these, lately: https://www.precisionmatthews.com/shop/pm-1228vf-lb/
Or maybe one of these: https://www.grizzly.com/products/Grizzly-12-x-36-Gear-Head-Cam-Lock-Spindle-Gap-Bed-Lathe/G4003
Agreed on all counts but I have made mine work. It just takes higher speed, smaller bites, and more patience. I have had some very nice surface finishes, but eventually I would like a heavier and more capable lathe as well. Oh yeah, and more free time too.
Be careful what you wish for … [sigh]
I know what you are saying but at this point how much more can I lose? I’ve lost one of two of my best friends, all my grandparents, a brother in law, and worst of all, my wife due to cancer, all in the last 6 years. I still have my parents and all my siblings. I’m only 54 too and doing the best I can. So yeah, how about some free time without or due to consequences.
As Jim Morrison put it, no one here gets out alive, but … not all at once like that. Our sympathies.
Around here, everybody’s shut in (“New York is on PAUSE“) and must stay inactive for months to tamp down the death rate. I get the distinct feeling not everybody has Something To Do, other than hit Refresh on their Facebook feed, and this supercooled calm won’t survive the next few weeks.
Comments are closed.