Adam Savage Repairs His Lathe's Magnetic Chuck! 

I can hear that on Jamie's voice, it's totally a thing he would say.

Grant! I miss Grant…

Rip grant

A couple of F-style clamps would have done the same thing. The investment was in time, seconds.

@@robertlevine2152 But where’s the fun in that? :)

@@robertlevine2152 while true, and the least amount of work required. it does not suit the over engineering overkill of this channel

@@cmdraftbrn good answer

Just flip the lap plate and move it instead of the chuck 😄

The man needs to learn about rigidity on ALL his work surfaces. He's preached about it's importance in a previous video, but obviously doesn't practice what he preaches.

bugged me too lol

@@whitey129 The big vice on the wobbly small bench is a constant source of frustration for me. He even did a video years ago about trying to make that bench more stable, but the addition of the diagonal tension straps actually achieved little. Still, Adam is a legend. I love him. He's an absolute delight.

the man has around 1500 clamps as well

could have clamped that plate down or ratchet strapped Ha

I was gonna make the exact same comment! 😂

Or possibly a skyhook, as seen on abom79. Definitely not something I'd want to do manually, for sure. Weedy noodle arms here. ;-]

@@llearch Jesus, that skyhooky thing is a piece of crap, and those are lightweight chucks! I don't bother with the overhead till I get to the 15" usually. well if im feeling really lazy and I have it in place, ill use it on the 10"... and im 145 dripping wet...

@@timkohchi2048 Congrats on hitting 145, and best wishes on this next year for your 146th.

Not really, was probably looking for "true". You don't really say concentric even though it could be used but it's usually used relative to another circle or axis rather than absolute terms with the lathe

@@inertiaMS What he's measuring is concentricity with the lathe spindle axis.

I was literally saying out loud as if he'd hear me. Lol😅

@@stargazer7644 I've definitely heard it called "true", but concentric is what it really is

For those who might not be aware, "trueness" is how close a measurement is to the real or desired value. Making it true means (in this case) getting the runout to zero (the desired value). So while you could say he got it within 5 microns of being true that's a bit like saying he got it within 5 microns of zero. It's a bit redundant since that's what the 5 micron measurement means in the first place - 5 microns from zero. What he's really trying to say is he got it within 5 microns of being perfectly concentric - sharing the same center - which was the actual goal.

And say "Oh there's my other chuck key"

Good luck at rehab stay strong

very much done today too, lapping and grinding machined surfaces are not good for any metal on metal slide ways (oil). linear rails are great but cant resist or bare the same level of forces a classic dovetail type slideway. and require to be serviced and replaced fairly frequently. i rebuild industrial machinery and i use our biax scrapper like once every couple months on jobs that need it.

still is the best way to get a metal surface sliding on a single 2D plane. Humans are amazing at creating geometric accuraccy, its just precision we have to make machines and stops to get to. (Or at least was before 2020. Ive been a little out of the game) Some people can feel out of round, and out of flat movements that are only nanometers out! it really is incredible how sensitive our nerves are.

After this I went and look it up. I think I assumed it was an older technique from seeing it used in old machinery rebuilding in videos.

The towel under the lathe 🥴

​@@kdub_He has the towel there to prevent the metal dust from getting on the rails and damaging them

Nope, not at all. Us 'muricans also use it!

Everybody poops, it's universal!

you gotta get where your close to your cut, then make a dam like a dentist, do your cuts. clean then your good. your wipers good? and apron sealed properly? i geuss you probobly dont have a leadscrew cover, so i geuss that would need to be cleaned. im just too lazy to do that every time

im guessing adam did not do that.

Saran wrap is what I use to protect my ways and critical surfaces. Safe, cheap and temporary.

@@mrtharpeis it red hot spark proof, though?

No. Not really. The gears here are exposed to the dirty enviroment; even if just by a little, thanks to that long slide. Grease would just trap more dirt and even hard metal chips to wear away the scroll pkate and chuck teeth.

Well, if we are getting this fancy, you technically need 3. the only geometry that can be shared by 3 surfaces is a plane. Two plates can end up with one being convex and the other having a matching concave surface.

You need three. If you lap them against each other, they will become perfectly flat. It's a mathematic certainty.

@@neilwinkelmann8540 Redundant comment.

​@@leaflee2066 more useful than yours mate 🤭

@@wrongtown What by exactly saying what the only other comment said an hour before?

He's done several cave tour videos over the years. They're basically what you're asking for.

That would have shown it was cut in a bowl shape.

Why would you think it wouldn't be fine?

@@stargazer7644 Because it went from full speed forward to reverse in an instant and let out a small puff of magic smoke. I don't know what kind of damage that can cause, but I've always heard it's bad to do so, so I ask 🤷

@@FinalSparkLux It's just an electric motor. Reversing it just reverses it. Have you ever reversed a ceiling fan? Or hit the brakes on an electric vehicle? Reversing it just puts the load of the spinning wheel on it, and that's not much load at all in this case. The wheel is tiny, hence why it reversed so fast. The actual grinding probably put more load on the motor. I suspect the "smoke" you saw was grinding dust flying off the fan blades. There's no reason for it to smoke.

You never had to buy used chucks, eh? Every chuck I buy (even the new ones) gets taken apart, cleaned, greased with Molybdenum, and put back together. Then tests and adjustments are done before being put into service.

Absolutely correct about the alignment of the cross slide to the spindle axis. In fact on most lathes it's adjusted so a facing cut leaves that very slightly concave surface (shown by the "unreached" centre after lapping). This is preferred over leaving the surface "high in the centre" so that any two surfaces faced on the same machine and placed against each other won't rock. I'm not old enough to comment authoritatively on the construction techniques of the ancient city 😉

@@russelldold4827 When I was a kid I followed the space program. I entertained by telling what was planned. Jealous detractors maliciously claimed I couldn't tell the future. A nuclear war could prevent it. To thwart them I prefaced with the morbid detail "barring a nuclear war." Detractors then claimed "You're always talking nuclear war". Like many attacked like this my 8 year old self invented another phrase that others invented to thwart them; "Barring some unforeseen event". A phrase that was so common it was in "The Right Stuff". Of course they demanded "like what?" to set up another detraction. But that was a question an honest kid didn't have to answer. So the cheats just started fights. I got good at fights too. In my career I made among other things the Boeing 777 fuselage turning fixture. 1600 were made with my fixture over 30 years with no crashes to this day. Detractors pointed minor crashes. To thwart them I added the morbid detail no mass fatality crashes. Detractors continued pointing out one shot down by Russians, and a missing Malaysian Air flight likely hijacked. Another morbid detail "mass fatality accident" to thwart malicious trolls. You detract by implication that a person has to be old enough to have seen Machu Pichu stones fitted together to speak authoritatively. I didn't see what the Baghdad battery was used for but I know what it would have been used for. Not lightbulbs or electro plating because they had none. It's common knowledge what they did have that the battery would have been used for. I won't tell you. I'd tell Adam. He has everything he needs right there to make one, and use it in 5 minutes.

Talk to Geico if you want to insure something. I hear they can save you 15% or more.