Leitz Optical Dividing Head Teardown P2

[@jobkneppers]

By disassembling a lot of stuff I found on the street on garbage collection day (tuesday@Delft) I probably learnt the most about mechanical design. First take a lot apart before building your own stuff. I remember puzzling about stuff "why did they do it like that" and finally discovered the answer by figuring out the true function of the parts. Really satisfying and a great way to gather knowledge how to achieve a certain mechanical goal or to discover why it FU. Such a beautiful piece of high end engineering and design is a treasure box for the open minded mechanical scout. It breaks my heart that this gem is treated in such a bad way and is beyond resurrection big time. All made on conventional machines, all designed with pencil and ink behind a drawing board. Respect for the team (not one guy for sure) that designed this piece in such a beautiful manner and all the sincere blue collar guys who made this amazing accurate assembly on conventional machines (Deckel, Schaublin, etc). No one even considered drinking on a sunday night. Monday was another "don't loose your attention day" or get sacked quite soon, day. Such quality made in many, many hours; impressive stuff. Tom, thank you for sharing this murder on this wonderful ingeniously build piece of kit. Best, Job

[@ronnydowdy7432]

I was a tool maker and I can tell that tool makers or as we called tool and die maker. Made these things. Of course a team of engineers designed it and draftsman drew the blue prints but I can see that tool makers made the precision fit parts. Love watching the show and I hope you will finish this wonderful tool. This tool can be used to create other precision tools. When I had to get out of the business is when CNC was in its infancy. Tool & Die makers had to make everything by hand with precision. But one of the most important tools in a machine industry I would say is the surface plate.

[@manymifi1]

It's amazing to think about the fact that they did all of this, manually. Really must have been a brain crusher. I'm currently an apprentice at a CNC-shop in Denmark, and the only thing i do sadly, is press the green button & setup fixtures for pre-made programs. I don't feel like im learning that much about the craft, so i watch these videos, with awe of the creation, that people 50 years ago have made. It seems so outlandish to me, that they could complete such a task, even just designing all the parts and make a plan of assembly, yet alone the manufacturing of the individual parts. Truly inspiring. But the way my career is headed, it will steer me away from such things.

[@lowsafetystandards7245]

Most machinists nowdays clamp stock, hit play and sip beer while posting on instagram how big and colorful their chips are. If you like manual machining I would recommend you buying a small tabletop mill and a lathe, you can probably find clockmaker's machines in Denmark but chinese imports will do fine. In a small machine you don't have any rigidity to spare: You gotta know your machining physics, tools have to be sharp, parts have to be correctly supported and aligned, you gotta know your feeds and speeds, gotta learn to do maintenence like oiling bearing surfaces and tightening gibs. Its a completely different experience from watching CNC controlled thousand rpm head covered with inserts eating through metal like it's wood. When you move back to a larger machine tool, having learned the value of rigidity, you'll become a far better machinist than your peers.

[@manymifi1]

@@lowsafetystandards7245 Thank you for the reply and recommendations - I'd honestly love to start something up myself, albeit that im currently "stuck" so to say, as i barely make enough dough to get by each month (apprentice). I'll have to start saving up, when my economy allows me to.

[@stuartschaffner9744]

@Manymifi, you don't mention the possibility of you ever being allowed to write some of those programs. For most of my life, writing computer programs was what put bread on my table. If your life situation creates an impassable barrier, then I am so sorry. Sometimes I felt the same way. In my case I got around the barriers but perhaps I was just lucky. If, however, you think you wouldn't want to do programming then read what you said about what inspired you. That's what you have to do to write good programs.

[@lowsafetystandards7245]

​@Tzuede Off the Cuff I use parallels to space my stock from the chuck's face and often forget to take them out after tightening the jaws, nothing like a hardened steel bar flying at your face to make you feel alive.

[@stuartschaffner9744]

@Tzuede Off the Cuff , at one level you are right. I was simplifying for brevity. My basic point is that most of the cool design issues these experienced metalworkers discuss have to be built in somehow into the chain of design decisions leading down to some CNC code driving a sharp cutter head attached to a 50-hp motor. Otherwise things break, melt, or come out badly off-spec. Sure, CAM systems have some AI built in to take care of the most common errors, but these AIs still lack common sense plus the years of refined experience that people like Tom have. When they do, all of us working people will be forqued. In some areas where I worked, any job that required real design and decision making required an engineering degree. Unless you have wealthy parents, that can sometimes be a barrier.

[@dixonqwerty]

I am Swedish, and we make some nice tools, but whenever I see a tool marked "Made in Germany" or "Made in Switzerland", I buy it if I can afford it. Best engineering in the world in my opinion. Their attention to detail and quality is second to none.

[@NicolaP269]

What a mechanical masterpiece. The same care and functionality found in Leica analog cameras. The hand of man, not algorithms that drive a computer make these devices pieces of the history of man's technological progress. Thanks for the video Tom.

[@ramosel]

The exquisite thrill of having both the knowledge and tools to take apart an elegantly engineered widget you can’t use and will not fix.

[@AWDJRforYouTube]

Sooooooo when I'm not stuck for time or money, I'll think about restoring one of these... Great video TOM👍👍👍

[@harlech2]

The engineering in this.... wow... just wow.

[@chipheadnet]

LOL "That's Interesting", my dentist told me that they are trained to say that instead of oops. I always get a chuckle when I hear it from anyone :) I love these type videos. Life time of curiosity has taken me through many a "rip it apart and see how it works" experiences. Thanks for the video!

[@bruceanderson9461]

It is an absolute no to say oops as you are working on a patient for obvious reasons. In practice labs working on a manakin set of teeth you are given an air bulb to blow off swarf of the dental kind so when you actually start working on patient’s you don’t blow in there mouth using your breath to remove debris instead of using the air syringe. Obviously this could be an awkward situation! 😦😉 retired dentist

[@KettleRiseRanch]

They made two?

[@heintmeyer2296]

I was told by a surgeon that they are trained to triumphantly say "There!" when they mess something up.

[@heintmeyer2296]

What a treat. This is like a massively scaled up version of taking apart a lawnmower engine as an 11 year old... Its just really fun to take things apart and figure out what's going on in there

[@parkermusselman9824]

Love to encounter a chingadera out in the wild. My Mother's side of the family has been firmly rooted in Central Coast ranching since California was in it's infancy. I grew up with it as a common turn of phrase for doodad, widget, thingy, or otherwise. The origin seemingly lost to time. I dropped chingadera at work recently in passing and found a native Bronx-born Spanish speaker's reaction startling. It turns out there is quite the verb lurking underneath the hood. Back to the topic, this is such a wonderful insight into how precision instruments are conceived and made. Thank you, as always for taking the time to share. I've recently started manufacturing microscope parts and have found a massive understanding from your years of tutelage in precision mechanics beyond valuable.

[@11zekim]

Awesome series Tom, thanks for bringing us along. Brings back adventures with busted Leitz and Zeiss cameras and lenses, down to the trick fasteners and Rubik’s Cube order of assembly. Most important lesson, learned the hard way: stick to your guns once you decide not to resuscitate! There always comes a dangerous point, where you have figured out everything wrong with it, AND know exactly how it goes back together…

[@MattysWorkshop]

Gday Tom, your certainly getting into the guts of the show there, so many precision components that make this thing work, you can see the quality of the unit just in the fasteners, extremely expensive item when new and probably second hand in good condition, thanks for sharing, take care, Matty

[@Gersberms]

It might be for a niche application, but someone really, really cared about doing the job right no matter the cost!

[@Ujeb08]

This instrument has some fascinating design elements in it. I especially liked how they pivot the worm to disengage. Thanks for sharing Tom!

[@gwharton68]

Good old fashion design ideas, great German craftmanship (craftpersonship??). Great American ingenuity to disassemble and repair the unit. And I am old enough to have and use an impact screw removal tool. They work great!

[@madlab6429]

Thank you.What a beautiful, well thought out design. The attention to detail is incredible.

[@nicolaspillot5789]

I'm baffled by the extractor cap for the pin. That's some serious practical smartness.

[@machineshopatthebottomofth3213]

I used to think those impact drivers were a gimmick, until I got one to use on the landrover. Saved my backside many a time

[@cojones8518]

Handy to carry one in the car for stuck/gorilla tightened lugnuts on the side of the road. Cordless and never have to worry about the battery. Plus, if you forget your hammer(or it walked off), a good solid rock works just as well. :)

[@componenx]

Yeah, it's saved mine a number of times also. I always look for them at estate sales because the bits chip. I also used to forget to make sure it was set to cam in the correct direction...

[@turningpoint6643]

Videos showing ultra accurate equipment designed and made mostly pre cnc are to me fascinating so thanks for making the effort of showing it's innards Tom. And as you say you can learn a great deal about design. A total shame someone didn't protect it from the water damage in the first place though. Gawd knows what one of those were worth when new. Some top quality high precision parts for the storage shelf at least. The spindle, worms and wheels could or might come in handy some day.

[@jerrywilson9730]

When I was a kid, I took an old manual typewriter apart. Those screws remind me of many of the screws in the typewriter. Neat watching you work, and talk to your self. Also love your many oddball terms. Keep um coming.

[@christopherharrington7337]

Absolutely fascinating watching you tear this down and talk about the parts and design. If you get the chance, more of this in the future would be greatly appreciated. Thank you for sharing this. Cheers!

[@i-squared]

I used to restore and collect antique laboratory instruments until they became too many to rescue. It breaks my heart to see such a beautiful piece of (over-)engineered instrumentation become parted out due to obsolescence and neglect. Hopefully, much of it can be repurposed. Those oculars are the start of some wonderful alignment tools. I know your love of instruments will spawn something cool and useful. Thanks for the breakdown Tom.

[@hanhdhsj]

Where did you get devices like this, sir?

[@ErikBongers]

Finally you got to shine some lights in the Leitz. I'm stealing the tapered pin with screwed extractor idea and the worm with the universal joint.

[@guygfm4243]

And I learnt about pins and a cap to take it out so good. Thanks for the video

[@christurley391]

You can learn a lot taking things apart. Thanks for the video.

[@railgap]

I was collecting antique lab instruments (more electrical than mechanical or machinist) for a while, and it broke my heart to come across some once-fine instrument from say, Leeds & Northrup, in a rusted-n-busted state that couldn't be recovered from. Those become parts for art, sadly. But it is wonderful to see how very fine instruments are made, the seemingly odd design decisions which reveal careful thought...

[@oh8wingman]

I have to admire your faith in your skills. When I take something that complex apart I use ziplock sandwich and freezer bags to keep all the associated parts for any portion of the assembly together in one group. I can then service each part group separately and it makes reassembly a lot easier for me when the time comes.

[@bcbloc02]

Really a finely made piece of equipment.

[@755Fight]

Almost as good as being able to take it apart myself. Thanks for sharing!

[@lukaradakovic5463]

Still can't escape the feeling that you'll be able to fix this one :)

[@heinrichschlechter6447]

I would love to watch a 5 part series on master Tom's hand at this...

[@mp6756]

What a pice of engineering so cool to see how presision parts were made befor the time of cnc and cmm. Raw skill and parts were designed to eliminate backlash and error in an assembly very cool stuff

[@broheim23]

What a great example of German engineering. Thanks for sharing, Tom.

[@peterblake548]

I last saw on of these at the PWA gage room in about 1965 used for grinding spline plug gages. No snotty nosed apprentice got to touch this thing. One sec of arc is 5 millionths of an inch per inch...you do the math. The Jung surface grinder is the colosest I got to anything this dear...also a work of art. Please don't part it out but give it an OXTOOL restoration...you can do it !! I would gladly offer my help but I am assured it's in very good hands...can't beat smoke up the A**.

[@jdubs-56]

WoW! Please keep going and let us have a part 3. Amazing!

[@samdude1953]

I like Tom's Opti-Visor with LED lighting. I haven't seen one of these before! Very cool.

[@howder1951]

Good video Tom, lots of "grunt grunt, oh yeah that's it!" and then a wonderful explanation. very cool strip down, I bet a build up would be extremely complicated, cheers!

[@pamdemonia]

So glad I waited 'til the end of a long day to watch this. Thank you!

[@matthewhelton1725]

Karl: "Klaus! This is too easy to assemble." Klaus: "Ja, you are right, let's make it needlessly complicated to assemble." Ludwig: "Don't forget to use randomly-sized fasteners throughout the unit" In unison: "Das ist richtig!" Karl and Klaus get straight to work...

[@cojones8518]

Ach du lieber!! KLAUS! You forgot to hid some screws and pins behind reverse threaded fake screws!

[@SuperAWaC]

Those of us who have actually had to dig into german engineered things know this is what german engineering is really like.

[@charleshettrick2408]

@@cojones8518 LOL! That happened to me on an Italian machine. We kept having a coolant leak. Traced it to a left hand set screw that was put in to cover up a machining error.

[@Chris-bg8mk]

German engineering: Why use 1 part when 3 will do?

[@arnljotseem8794]

I have two Porsches that I use daily. One is 30 years old, the other is 40 years old. They are still working by design. I disagree with the notion that German engineering do things overy complicated, rather as complicated as it needs to be.

[@markgreen7701]

Love these teardown videos! You could start a whole new channel tearing down the good old tools/instruments..

[@noahderrington5156]

What a stunning piece of engineering. That’s for the videos!

[@n00nien]

Just purchased one on the ebay,. I'll be very anxious til it arrives (finger crossed), your videos are invaluable, with them I really hope i can put mine into operation on my sip hydroptic 6a. Btw why should'nt be yours fixable ? It looks the glass disk is healty and if the same goes for the main bearings you have at least the heart of the machine beating, the rest should be just rust removal and cleaning..

[@1ginner1]

Depends on the heart of the machine, although as you say, the disk looks healthy, its the rest of the optics that may be beyond repair. I hope it can be cleaned and reassembled.

[@peterblake548]

Tom - FoR an FYI moment...the screw hole in the faceplate rotation worm is for lubricating the worm. It should have a setscrew in it...possibly pretty deep that forces grease into the innards. I well remember the retort from the old German when I was exploring the thing at P&WA...it went something like this "YOU DON'T BE TOUCHING DAT".

[@scottroland6577]

It would be very interesting and useful to catalog the unique design features, including the types of levers, springs and fasteners. There are so many high quality features of this machine that are learned during this disassembly exercise, that it's a shame to lose visibility of them. One could go back through the video, and perhaps capture some of the points that you (Tom) has highlighted, but additional footage of the detail of that feature would be nice to aid in the re-application of the feature in another machine design. Not that you're looking for more stuff to do. Thanks for all that you do, and the valuable details that you provide.

[@componenx]

Gotta love those German screws! I've been rebuilding a pre-WWII German horizontal mill (G. Karger), and it's loaded with those very narrow slotted screw heads. I had to grind the blade of an impact driver bit in order to get some of them loose.

[@toolbox-gua]

Too bad the condition of no return. Would have been an incredible show and tell. Thank you for your time to share.

[@staciedziedzic8706]

Hi it’s Stacie! Holy moly was this machine sick! All that rust and grease and grime ! I also feel bad that Tom had to smell all of the icky yucky stuff! I am not a machinist person but I for sure would have taken better care of my parts!

[@CaskStrength777]

Please do a part 3! really want to see how that spindle comes apart. Some really elegant mechanical design features to this thing, I really like how the handwheel cam pivots it out out the adjustable backlash fine feed worm. Can you explain how that anti rotation ring at 9:06 works? It looks like there was a space for a bolt to go in part of it to spread it but I never saw any bolt come out of it and I have no idea how they would spread it unless there is a spot in the outside of the casting to drop a bolt through from the outside.

[@josephwilson6651]

The best efforts of engineering and manufacturing integrated

[@bulletproofpepper2]

Hold on I got go to put on my vintage oxtoolco tee shirt and get the popcorn ready !!! This is going to be epic!

[@bulletproofpepper2]

And my better glasses!

[@constantinosschinas4503]

that pin/extractor pin combo was sweet.

[@zachaliles]

I have a snapon impact driver. I've had it for over 20 years from back when I worked at midas doing brakes and exhaust. I bought it because honda used to use a Phillips head screw to hold the brake rotors on the hub during assembly at the factory. There was no way you were getting them out with a normal screwdriver. Impact driver was the ticket. Nowadays I rarely have a use for it, but it has a spot in my box at work in case I do.

[@сашапашп]

Veeeery interesting teardown!)) Will wery nice if you keep it up with interesting teardowns of equipments..)

[@peterblake548]

Tom - Have you done a video of the final disassembly which is shown on the first frame of this video? Pulling the bearings, etc. Don't be shy about those splendid bits that you might have motzed in the process. This was a great learning experience for me and, I am sure, your other viewers also,. You have it down to the carcass, why not bring it back to life. What to use it for...like calibrating Weber angle blocks, optical polygons...the list goes on and on. All you need is an autocollimator. Another FYI...that knurled knob you referred to is not the focus but is the fine divider for the optical scale that resolves to 1.0 sec of arc.

[@TraditionalToolworks]

The Germans are just amazing with their ingenuity...some of the things on my Deckel amaze me what they will think of. FWIW, Deckels were used to make Leica lenses, as I recall. Mechanics at it's best.

[@domaves4043]

"If you want to protect your feet, wear shoes; If you want to protect yourself from the world provocations, tame the mind" Tim 'OxTools' Lipton Very nice, good advice for everybody. Very Dao!

[@Pest789]

I bet they sold TENS of these things!

[@Ddabig40mac]

In the Last Remaining Bastion of Imperial Measuring Systems, the term "Dozens" is linguistically preferable.

[@learnin30seconds]

Nice one! Support from "Learn in 30 Seconds".

[@MWL4466]

Cool video Tom. And a very cool example of German engineering. I run a horizontal boring mill made by the German company Wotan and it has optical sights on it ! They dont work anymore but everyones first reaction is " why the hell would you need them "?... my guess is so you could accurately pick up a datum point. But man oh man, the work that went into this system is crazy. This same travelling-column mill has at least a dozen clutches in it and it is a good working machine but just seems so over-engineered to me.

[@ROBRENZ]

Awesome Tom! Put a hollow shaft Heidenhain encoder on it and slap it back together :-) ATB, Robin

[@mm9773]

13:06 LOOSE - TIGHT. How literal. I like it.

[@mftmachining]

This would be an interesting international restoring project. Tom sends the parts all over the world and we guys see what we can do. I´m in. I would love to be part of a mammoth project like such. Of course all on the partipiciants cost. Like said, i´m in.

[@aserta]

It would, but...without the proper calibrations...not worth it.

[@mftmachining]

@@aserta Don´t be so negative....Tom has got the combined brainpower of the world at his dayjob...they work at an completly different level than this optical device....there is probably nothing that these people couldnt do...just watch the video tom and john saunders did.......

[@billphillipstube]

Evaporust has entered the chat.

[@07Stylist]

Love this tear down can’t wait for more

[@rexmundi8154]

From a design point of view, I like that the detent lever on the brake handle is the same diameter as the piece behind it.

[@bobvines00]

Tom, in the next video in this series, will you come/go back to the small wormscrew with its pivot and tear it completely down so we can see all of its details? For good ideas for building our own rotary tables, indexing heads, etc.? This optical dividing head is fascinating! Thank you for sharing this, even though it's not worth repairing/restoring. ;)

[@Smallathe]

Fascinating!!! Loved the tapered pin release system. Very elegant. Any chance you will be reusing some of these parts for a future project?

[@TrPrecisionMachining]

very good video..thanks for your time

[@cojones8518]

32:00 Those actually have ball bearing(s) that act in a ramp. As you hit the end it forces the ball bearing to try to go down the ramp, since you're holding it, it puts torque on the shaft. They have a snap ring on the front and are pretty easy to take apart. Pretty fascinating how simple they are, and how useful.

[@TheOpinionationer]

he's absolutely right about the old motorcycle mechanics. I could never have survived all the old Japanese bikes I used to work on without an impact driver. They're basically sewn together with JIS phillips screws.

[@akfarmboy49]

a couple years ago i was rebuilding a Aurora camera telescope system and it got flooded with from leaking roof hatch, Hot water was best way to get the rust that settled and coated every lens, the optics might be easier to clean then you think.

[@Videowatcher2.0]

Will it be alright......with SOME LOVE..GRATE VIDEO

[@santopezzotti730]

Hi I really enjoy your channel I’m a beginner at 70 years old can’t wait to get started. I just purchased a Taft Pierce Service Grinder have you ever done a review of your surface grinder. Or a how to use your Taft pierce surface grinder. Thanks again for all your helpBe safe

[@69woodburner]

Achingly beautiful bit of engineering.

[@susanbarbier5053]

32:00 Those “Phillips” screws you’re talking about is actually. JIS screws. Japanese Industrial Standard. They don’t cam out like Phillips. But even my Vessel impact driver can’t get some out!

[@LopsidedAdventures]

I'd love to have one of those, just to serve as a stimulant for future possible projects.

[@Opinionator52]

Lots of grande engineering went into this beauty,,, it 'll be fun to see the re-assembly!!! :o) . O,,,

[@larryscott3982]

It’s built like a Lietz land survey theodolite. A 1 arcsecond theodolite uses the microscopic setup and glass angle plate

[@martin09091989]

Oh man that worm gear 24:00 is exactly what I'm looking for! 🥺 I am building a equatorial mount out of some chinesium as a blank. And i can´t find a worm gear with a high enough ratio. Looks like this has around 1/150 !? And it looks so sturdy and precise! 😭

[@wilcojuffer5940]

I think it is a gear of 120 or 144

[@JustinSeiffert]

There are tutorials online how to make a simple presise wormgear in a lathe with a tap for the gear cuting

[@martin09091989]

@@JustinSeiffert yep! That is the plan! Don't need a stout gear, just a precise one for this application.

[@vincei4252]

4:33 If you can't measure it or manufacture it easily make it adjustable :-)

[@alaspooryorick9946]

Amen. That's my mantra! If you can't make it precise make it adjustable

[@matttradie1341]

Imagine how long it took for the guy that dreamt up the design to build it. The casting alone is a feat. You really have to hand it to the inventors and machinists of the 1800s and early 1900s. Not only were they building these hugely accurate machines, lathes and mills etc, to manufacture such things to advance the human race, but they were coming up with the processes designs and the METALS to do it out of thin air. It’s like we of this time are cheating. I guess it’s how you look at it, but no mistake they were incredible craftsmen.

[@stargazer7644]

This thing is only about 60 or 70 years old.

[@stuartschaffner9744]

Oh, that was so cool! At least you have every step on video in case you want to reassemble it. Let me suggest a theory. Before computers, machines got more complex as the world economy evolved. That meant more moving parts and more wear, meaning even more complexity to compensate for the wear. Post-computer, equivalent machines have many fewer moving parts, each made to greater precision. Most of the complexity is now encoded in silicon. Perhaps this early post-war and very expensive instrument is very close to the apex of the mechanical complexity curve. As such, perhaps it has some historical significance even if it no longer works. Just a theory...

[@chieft3357]

Everyone that worked on old British autos had an impact driver in their tool box.

[@componenx]

Interestingly, I have a Herald and a Bugeye, and I never used one on them. (Long breaker bars and gallons of penetrating oil, yes!) Old machine tools on the other hand...

[@chieft3357]

@@componenx Well, I worked on a lot of import autos for almost 30years. I used my impact driver many times on many things.

[@captcarlos]

That is a magnificent bit of engineering. I'm sure if it had been appropriately looked after it would be good for generations! Some artefacts we don't own... We are just their caretakers. And we should recognise when we are about to lose the desire, ability or the finance to continue as suitable custodians.. And have been on the lookout for the next suitable (sucker) home for them. Otherwise shit like this happens, and we have all seen it and shook our heads! I'll step down now...

[@HomeDistiller]

I'd put that thing on a shelf in my lounge room lol... You could just make up stories about it "it's a naval gun site" lol

[@mftmachining]

Ya need a stable shelf for this one....lol

[@RookieLock]

Talk about some complex parts.. Loving this Teardown.. Is it too far gone for a restoration ?

[@vincei4252]

This feels like watching Tom disassemble a Hydrogen bomb :)

[@ErikBongers]

And indeed there were 2 wires inside...

[@PeregrineBF]

Naw, that's his day job...

[@wilcojuffer5940]

this is something for Adem Savage one day remove or I think one month and later when he put al together he have still some parts over 😉

[@vincei4252]

@@zxborg9681 I think Tom's day job involves juggling atomic bombs. He just won't say it out loud :)

[@hyperplastic]

Are you releasing a part 3?

[@petemclinc]

Leitz Optical Dividing Head "lights" up my day. It deserves a complete Ruckerestoration, some EvapoRust and ultrasonic baths should do the trick. It would be a crying shame to put it back together in that condition.

[@stumccabe]

It looks quite easily restorable to me. It would be a shame to scrap such a high precision instrument. Thanks for the video.

[@h7qvi]

You can easily derust it like new. Degrease it using non alkaline degreaser in a parts washer then rinse. Put evaporust in a parts washer and leave it streaming over the parts for a few days. Put an aquarium heater in to keep it 25degC or more. The rust will dissolve and the evaporust can be reused. A coating is needed to stop rerusting, or put in some dessicant if it's well sealed.

[@elidouek5438]

that's work if it was just surface rust, but there's probably a fair amount of pitting in the metal

[@rickporter2284]

Turn screws can be filed to fit fastener.

[@12345NoNamesLeft]

All good things must sit outside in the weather to thoroughly rot to hell, before being surplussed....

[@davidewing9088]

I am building a rotary table and was discussing with a tutor just the problem that your pivot would solve. Can you perhaps provide a bit more detail of just how that pivot would work?

[@alext8828]

Two things I noticed, other than the fact that you're straying away from your hollow-ground screwdrivers (shame), were what looks like heavy pieces turn out to be pie pans. Stamped or turned thin material. The other is that of the simple design. I took my piano apart for repair and was surprised that every single part or mechanism was the most simple design you could imagine. Where I expected a coil spring, there was just a piece of spring steel screwed into the wooden frame. There's a lesson buried here. You hit on it when you took that handle apart (circa 13:?).

[@mnoxman]

This must have been expensive when it was new. All of the special operations that were needed to make this.

[@chieft3357]

I like your walk the talk T shirt.

[@wrstew1272]

I lust for your tweezers, they are fine examples of the toolmakers art. Starrett?

[@FesixGermany]

Well yeah the inside really looks horrible, sad to see... I think all of us Germans are at least hapy now you pronounced Leitz very nice now.

[@AlBorland3877]

@oxtoolco Perfect pronunciation. Now our embarrassing german striving for perfection is satisfied. ^^

[@ErikBongers]

A European-American conflict has been averted.

[@AlBorland3877]

@@ErikBongers once more. We are the good ones. :D

[@aquilifergroup]

And peace reigns throughout the land and Germany does not invade Russia.

[@pontoonrob7948]

I like the idea of watching you use the parts to make a rotary fixture. Then maybe sell it to a viewer like myself;) ;) nudge nudge...

[@molitovv]

Pretty upset you won’t be restoring this! I was only just getting over you selling the Autometric.