Rebuilding a drillpress spindle 

👍

every time i lull myself into mediocrity i just watch stefen heh, snaps me right out of my "good enough" rut. lol

eeeh he is just really good ,insane pecision would be range of tom lipton from ox tools.

@@zumbazumba1 Tom is excellent but Robin Renzetti works in jaw dropping detail when it comes to overall skillset as a toolmaker. Robin is also a master in his craft with eyeball deep nerdology. Stefan is excellent in his own right and has many more years ahead of him to grow. That being noted, Stefan is VERY good at his craft and shares much insight, sans any "bob's your uncle".

Oh wait, you forgot Peter from Edge Precision, he is the Yoda of CNC machining world

@@zumbazumba1 Is Tom Lipton really considered "more precise" than Stefan? Do other people agree with that? Genuine question. I am too ignorant in machining to have an opinion.

@@planaritytheory Imo Stefan is at least equal to Tom, but they both excel in there own slightly different areas.

Smurfs are from Belgium, not that funny for them! 😁

That video will humble the greatest of precision veterans...(mill spindle is very different than a drill spindle though)

Indeed his videos are excellent but far too few of them.

carbide is good but cbn is better ;)

actually you can buy carbide tipped scissors from medical supliers.

I saw ceramic-edged ones at an electrical supplier; they're for cutting the kevlar jacket on fiber-optic cable.

@@jimsvideos7201 you don't really need ceramics to cut kevlar, just make a quite rough 90 degree grind on decent steel scissors and they will cut kevlar just fine, rough texture helps holding the fibers from slipping out of the V, 90 degree grind is the magic ingredient they won't last as long of course, but in a pinch it works very well on this tough bendy stuff

Why not just go to single crystal diamond scissors? Cost maybe?

when I do something it ends up 0,05mm off

👍

It is now

I was going to ask how that was spelled

It’s the European standards version of the ubiquitous Tom Lipton “Dingus McGhee” 😁

If you see what drills they actually use to perform brain and spine surgery you will be dissapointed. I didn't know how crude these surgeries were until my spinal surgery failed and I ended up learning the nitty gritty myself (in the time of the internet one can just attend medical specialty schools like neurology, neurosurgery, radiologist and orthopedic without actually being a student there as long as you don't perform surgery on anyone who is alive) after a dozen doctors failed to see the obvious signs that other doctors were too ashamed to admit they missed too.

@@Sketch1994 they just use a normal drill people use in their garage

@@DolezalPetr Pretty much yes...just in stainless. And while I thought it's more like precision machining it's more like contractor's work...

@@Sketch1994 Doctor's are just mechanics that work on people.

@@orangedream267 It's like trying to fix leaks without first draining the liquid.

@@ydonl Good point; but moot, being so far in the future. However the issue is completeness of task in the here and now.

@@ydonl Are you trolling me? Sorry. That doesn't work

@@forrestaddy9644 No, sir -- sorry. Stefan did a stellar job, with runout down in the micron region (which would be 0.000039 inches... 39 miillionths...) and my conclusion would be that he's both very bright and very skilled, as well as possessing excellent judgement. I suspect that if he thought the center hole had any significance, he would have addressed it. I wouldn't have been surprised, but neither am I surprised that he ignored it. It hit me oddly that you would think the best response would be to pick up this arguably inconsequential detail. I think the best way for you to show your perspective on the matter would be to... show your perspective on the matter! :) Clearly you would have dealt with the center hole, but what else would you do differently? How would you go about it?

@@ydonl Au contrair. I have the highest respect for Stefan, a fine machinist and craftsman with a real talent for explaining the arcana of our trade. He does fine work expeditiously, neither hurrying nor fussing over trifles. Maybe I should explain: I'm a retired machinist. I entered my apprenticeship in 1961. I have 40 years diversified and progressive experience usually specializing in large machine tools in a busy Naval shipyard. Over the years, I worked most places in the shipyard where a machinist was needed, the outside machine shop, the gyro shop, the instrument and director shop, the optical shop, the shipfitter and pipe shops, nuclear, transportation. The place was a feast for anyone fascinated with the metalworking trades and I took full advantage of opportunities to enlarge my experience. Add to that stints in layout and inspection, shop floor instruction, and a final eight years in production engineering. Thus, Steven and I are peers. He deserves adulation for his ability, trade knowledge, and craftsmanship, no less so for his clear and well-presented exposition and running commentary on the work he is performing. As a peer from two generations ago, I think it's appropiate for me to gently zing him over trifles as peers do from time to time. Whether my nit-picking about dressing the center hole was unnecessary depends on circumstances. If the drill press spindle was in a system under programmed maintenence, centerhole concentricity could save steps in a future repair; consequently, a few extra minutes re-tooling it might save the next guy time. However, most of the time that step might be, as you say, inconsequential. I'd do it because that was the way I was taught. I've spent too many exasperated hours doctoring battered shaft centers. Stefan may not because chances are the centerhole will be obliterated by a bearing puller, or worse, hammer blows.