Who needs a cylindrical grinder? || RotarySMP 

To answer your question: Everyone. Everyone needs a cylindrical grinder. :)

It warms my heart to see Franz making parts to fix his own tractors. I hazard he doesn't buy the bait and switch that is modern John Deere equipment.

I live just a few minutes away from Mělník. It is nice to see machines made in Czechia / Czechoslovakia. Great job showing this complex machine.

90% of my job for the past year is using a cylindrical grinder so it's good to see it get a bit of love

You are absolutely right. I have absolutely no need for one, but am actively searching for one now.

Appreciate all your videos, its a pleasure to get a notification from your channel 👍

Looks like farm life is a homeshop machinists’ dream. Nice video!

I'm always fascinated by the economics of machines like this. I have no knowledge of what the machine tool market was like back then, but consider: First, that machine was built pre-internet. Someone sat down and figured that it was economically feasible to invest in the design and tooling to build that machine (what was the design cycle like for it?) and figured they could sell enough of them to recoup that investment. How long did it take to design, and what was the cost? How long to build the tooling to produce the machine, and what the cost? How many did they deliver, and (again) what was the cost? And on top of all that, the machine is entirely hydraulic. Yes, it has relays, but (apparently) no digital electronics, and yet has pretty amazing accuracy and resolution. Incredible.

Original grinding wheel, only worn 12mm... wow! 😂 The last OD grinder I used went through a wheel at least that large every 16h or so. Needless to say, we got good at changing them. One concern with a small coolant tank is temperature stability. The grinders I worked with (mostly UVA nomyline) had a chiller with at least two separately cooled circuits, chilling different parts of the machine to different temperatures. IIRC there were heat exchangers on the cutting oil, spindle oil, and hydrodynamic way oil, and coolant flowed through the frame and the linear motors as well. The cooling was good enough that warmup from power off only took ~5 minutes, as opposed to 30 min - 1 hr for older machines.

You’re right, I gotta have one of those 😍!

That is a wonderful machine and I'm sure will serve well. Thanks for letting us take a look.

5:11 Wow, that automatic coarse / fine feed in is magic. Never seen something like this, especially in mostly purely mechanical machine.

Wow! What an awesome machine. These automated hydraulic controls are incredible. I bet he got it for next to nothing compared to its capabilities… If I had a machine like this I would come up with so many more project ideas that I would most likely never get to start or even finish… so you are right: I need a cylindrical grinder now 😂. The model planes are astonishing as well! Thank you very much for the video

Did you see me waving as you flew over Arizona? The museum is officially on my list! Thanks for sharing.

👏👏👏👏👏👏Thanks a lot, to post the video tena koe , Kia ore!!! Beautiful ! Love it

Man, at work I've been slowly learning how to use a manual cylindrical grinder from like the 70's it's quite a bit bigger, it's intimidating and I've done plenty of jobs on it and watching this I kept thinking those cuts are so much bigger than i take.

Mike from missouri us. Here, im a retired automotive machinist. Love the vidios! Look into crankshaft grinder wheel balance stands. They are plenty tall enough for his stones. Keep up the good job, mike t.

Oh wow, hope you had an overall lovely time in my hometown of San Diego. I need to check out this museum!

I haven't even finished the video but I already know I need one!

Beautiful machine, TOS machines are very well built.

The detail in those models is just astonishing, I wouldn't even like to guess the number of hours that must go into them.

this is amazing, automated hydraulics is something I have never explored before

Dang I'm jealous, I love grinding equipment like this, I need one of these in my home shop! Of all the hundreds of machine tools I've run precision grinders are the most fun for me, it's amazing what you can do with these things. I've done some parts measured in one-hundred thousandths of an inch with a similar setup, that's probably the tightest tolerances I've ever dealt with and I loved every minute of it.

Thank you for sharing this with us! I knew what a cylindrical grinder was and what it was for but I have never had the opportunity to run one.

Lovely machine and great presentation. Wish I had space for one but only just squeezed in an MG12.

Wow, cool machine, thanks for the overview. Very impressive for a home workshop!

That is one super cool machine!

Love it. A cylindrical grinder is on My list. Unfortunately they all seem too take up huge amounts of workshop space. One day I will find space

What a gorgeous machine! Amazing find!!

Thank you for the adventure! I don't _need_ one of those but I could certainly get some use out of one. It's on the list but that list, compared to the budget, is very long indeed 😅

Very cool machine. I need a larger shop.

It’s as if I was back in my granddads shop & being taught by him Being only 9 years old I loved using all his machines & making some pocket money to boot 😊😊😊

Love your channel u mix homemade with shop made tooling with maestry keep doing the great job congratulations from Brazil

Marvellous stuff, thank you!

Your right. I want one now.

Great video. The museum looks amazing and nice to see Mark's engine on display.

i use a much bigger one at work. the grinding wheels (yes it has 2) are about 3 feet wide and about 16" in diameter. the parts slide between the wheels that spin the same direction and have an angled bar between them. the wheels are angled so that they move the part along the bar instead of staying in one spot. it also helps progressively grind the OD slowly instead of doing it aggressively you can run a hundred parts through it in about 8-10 minutes. it cant do tapers though only straight grind.

Thank you for taking a video to check out that grinder. It must be tricky to figure out topics that aren’t 100% on topic for current projects. This one was great!

Servus Franz (mit dem hab ich eben telefoniert)! Bei 10:20 ... Entweder hast du die Scheibe nicht abgezogen, oder das Teil läuft noch komplett unrund. Auch wenn rundrum schon geschliffen wird. Man sieht das an den Funken und hört es auch. Klingt nicht gleichmässig, die Funken kommen unterbrochen. Nicht zustellen, ausfunken lassen. Zustellen, ausfunken. Das muss ganz weg. Wenn du Pech hast, dann überträgt sich das auch auf die Schleifscheibe und die wird dann zur Noppenscheibe. Bei sowas mit dem Finger auch die laufende Scheibe fühlen. Das muss komplett glatt sein. Übrigens darf man nicht an die laufende Scheibe fassen. 🙂 Ach, ich bin übrigens neidisch auf die TOS!

You guys are awesome! Franz (I hope proper spelling) is a genius! I’ll be on the lookout for any of the items you guys stated in the video as soon as I am recuperated from procedure! I am in New York and there are soooo many old timers here that have a tight community & stick together. Warmest regards to you and yours.

TOS , great machines!

I have a tos surface grinder. Such a good machine

Another machine added to the list

Never knew about that museum - thank you for sharing. Another great video!

very good video rotarysmp

To anyone willing to learn the grind I highly recommend Jeffery badger aka the grind doctor. I've inherited a 220" long Cincinnati milacron that uses a 30" wheel. The question what exactly is a spark came to mind. Friction so how do you know if your removing material from the part or the tool? Also if your using a true round wheel shouldn't the part also be round? I wish I had a tapper adjustment. To grind with the adjustment you can grind more detail. Very jealous great video

Very good thanks for sharing

Oh man, Franz owned an Anglia 105E as his first car? Me too! I don't still own it though. I think I thrashed the pants off it. Thanks for showing the footage of the Joe Martin Museum and the Titan engine. I would love to see some of the exhibits there. Regards, Preso

...I have about 7 of them, for external and internal grinding, unto diameters of about 1200mm and can grind holes unto 1000mm deep. I somewhear have a TOS, but my TOS is not a grindig machine. If You have a surface grinder, you can make supports to make your balancing mount as high as you want. You could also make 2 leveled straight rods to level the wheel. If they are propperly adjusted, that works great. i use something selfmade to balance wheels with 800mm diameter. The internal grinding spindle is driven by some kind of belt on most old external grinding machines with internal grinding attachment. I have a small Toyoda with something like that, but i never use it, because i have a dedicated internal grinding machine.

Pretty cool machine.

Very interesting, thanks for sharing! 😎

I have worked with these machines in school a 3 years ago. While these machines are extremely well automated, if not in a perfect condition it sucks. But I see thats not a problem here. I think I know a guy who knows a guy who can youthe balancing jig and the ID grinding attachment

Now I know where Barry Jordan's Bridgeport and Holbrook models ended up ! Last saw them in 1998 at the exhibition we held for the SM&EE centennial celebrations at Brunel University. (Barry was in attendance!)

BUAJ 28 - Bruska Univerzální Automatická Jemná - Grinder Universal Automatic Precise 280 mm where 280 is maximum diameter of the material.

Wow.. extra point for showing Marks engine!

what a TOS great machine use one at work

Preso's engine! That museum looks fantastic. Need to get out there some time.

I love that tick tick tick precision! Will you be showing us more of the museum?

Lovely machine.

,Cool machine, great video! Follower of Mark for years ;) Will definitely be visiting the museum. Didn’t know!

A DIY cylindrical grinder might be a fun project. A super small desktop scale machine to make something like an Iso 20 belt driven spindle for a desktop cnc mill (which does not seem to exist).

Great Video amazing what us humans can produce

Hello Mark, Really interesting video... I know Carlsbad quite well as my daughter lived there for 7 years and I would visit a few times a year. Sadly I was not aware of the museum. I am hoping to go there next year to visit my ex father in law so will for sure visit the museum then. Take care. Paul,,

The machine everyone wants to buy ;-D Also my experience, buy broken machinery, they usually had the least work to do, if they broke early in life.

That'd be great for reamers... I concur on the spare room for hoarders, my garage is filled. Carlsbad also a surfing mecca, but then there are many down there. An Awesome state in the 1980s, esp. SoCal. You should find The Post-apocalyptic Inventor's now famous junkyard in Germany, he's scored loads of .DE made gems.

As a profesional grindef i think you should use more coolant (water). Habe auch mitbekommen, dass ihr deutsch sprecht. Wenn Ihr verhindern wollt, dass euch das Kühlwasser wegspritzt musst du die Abdeckung oben näher an die Schleifscheibe schieben das keine Luft mehr durchgeht. Gruss aus der Schweiz

I have a Covel No.32 Universal and cylindrical grinder that is laid out almost identically. The Ways for the table need scraped and they are like 6 feet (2 meters) long... not looking forward to the work. Have to finish scraping in my Covel #4023 10x16" surface grinder first. These old machines are awesome but I would have killed to find one in such great shape!

What an awesome machine 😊

Nice machine! I have a very old Hercus 9A, need to learn how to use it properly!

Fantastic machine. Many thanks to all those countries that manage to destroy econonically all central and eastern europe countries and their big machine industry, including TOS. Great film, thank you

Sorry, my Englisch is very bad, please use Google translate 😉😆ich habe auf einer ähnlichen Maschine von tos einige Jahre gearbeitet. Diese war Baujahr ca 1970 und hatte weniger Funktionen aber lief einwandfrei und sehr genau 👍 außerdem hatte ich in der Firma auch eine Maschine zum innen rund schleifen von wmw ( DDR) mit Nocken und Relais Schaltungen für den schleif Zyklus . Schwer zu bedienen für jemand der Jünger ist als die Maschine 😆 deine Tos gefällt mir sehr gut.

WOW! That was an impressive video! From the cylindrical grinder to the Craftsmanship Museum, I watched it all with eyes wide open 🙂 Great shout-out to Mark Presling's impressive Titan model engine build (I eagerly watched the whole series). Playlist here: ru-vid.com/group/PLbPzkHRZCQB8uBSFsim70U9hKNhcpp7Xk

Love TOS old iron, it's always surprisingly good. Been looking for a nice FN mill but they are pretty rare over here. One day....

I have a Dremel mounted to my 7" Harbor Freight lathe so that I can get precise diameters on long shafts. If that counts as a cylindrical grinder in a home shop I'll happily make a video. :D

A follow up vid showing some of the prep for operation would be nice. Like truing the wheel profile - the short stroke on the taper means the resulting profile is almost entirely controlled by the wheel profile. Also, the grind kept showing an interrupted contact, why is that?

Thank you!

Chips are nice and all but sparks do touch my heart a bit more. Grinding could use some more maker representation here on the youtube. looking forward to the lathe completion \o/

leave it to an airplane mechanic from austria to tell me about a cool museum in my own town that id never heard of hope san diego/SoCal was kind to you

VERY NICE

the size of that wheel is nuts

No winder I thought I knew that surface grinder from somewhere... I think tools and machines are like gases, they expand to occupy all available space 😂😂 I wish my farm shed was 1/2 as cool as his, I don't have my fisrt motorcycle but I have my 2nd one, throwing away salvageable stuff goes against my religion, all hail the Holey Packrat.

TOS machines are top quality

Rewatching this vid, likely for the 3rd time now... Damn, that is some savage preload on that spindle... My surface grinder while stiff, can be turned by hand with little issues... In fact, whenever i start the spindle, i turn it by hand and then tap the switch to power up... It eases the life for the motor, and its in general a bad idea safety-wise, which is why i do it with all my machines... Lathes, mills, grinders... Even the angle grinder gets a wrist flick before i snap the trigger into position... But that TOS grinder is almost like a diesel engine with 20-1 compression... Why in the hell is it so strongly preloaded? The wheel mass and diameter i guess, but while 40cm is much larger than my s.g. wheels of 24cm, i dont see 16cm dia difference warranting that much of a preload difference... Especially since they are the same width wheels... Btw, that twin ways spoken of lathe is on her way to my driveway this friday... Checked her out yesterday, literally not a single new spot o` rust... Told ya that my lubricant coverage game was supreme... Now i just have to sell a few pneumatic collet closers and such accessories to get 3x the money that i spend on my last few machines back, per piece... The last lathe i picked up for peas has a large pneu collet closer which i can likely sell for 1.5k$ or so, which literally covers the machine, the transport and my trips to check her out and all that by like 3 times... Or, it pays off that lathe, the lathe im about to get and the deckel s1 that i picked up a year or so ago, and their respective transports... And i have quite a few of such things to dish out... And a huge hydraulic vise to fix up, scrape in and dish out for somewhere around 1k... The bloody thing is half a meter long... You dont want that brick slipping outta your hands and falling on the feet... That is a quick and dirty amputation... I got it for what was it? 30 euros? Something ridiculous like that... It would fit my large mill, but its just an instant waste of table space, as with that, nothing else could be mounted... It would have to sit parallel to the table rather than as you usually mount a machine vise... It was bought exclusively for restoration and re-sale... Even my surface grinder cant use it, which is enormous, at least when compared with most youtube shop surface grinders... Don`s from Suburban notwithstanding... Tony`s grinder is a toy compared to it... Literally a bench grinder in comparison, given that you can actually take parts off of `er and move them as a single human... Its kinda how Jeremy Clarkson described the Bentley Arnage 2007... A cathedral... I will film that lathe when she comes... I wont however film my shop yet, as its a fucking mess and in no state to be displayed... Not with 4 large machines stacked like sardines, next to each other... The rest is more or less in permanent positions, well 2 of those 4 are also in permanent places, even 3, as the third has to budge a bit to the right where the aforementioned lathe now sits while i work on her... Tho, i must tell you, everytime i watch this video, i curse myself for missing out on a fortuna cylindrical grinder... I was a day too late for it... She got cut apart with oxy torch by the time i got there... Tho, i did save the parts head and tailstock for a special project that is the aforementioned machine 3... But its such a sad thing thinking of the sight of that beautiful machine being cut by oxy-aceti to bits... I should have put down a deposit and gotten her... A damned sin that was... Oh the grief this world conjures... And only because someone died and the machine was tossed out, and my ass was too indecisive... Never again my friend, never again will i let a machine be obliterated if i can save her and sell her to a loving new home, where she will outlast the new caregiver... I think i still have a slagged t-bolt from the slant table off of that grinder somewhere... I guess as a masochistic reminder... All the best and kindest regards! Steuss

I'm a grinder 20 years cylindrical grinding finally a video, how about centerless I'm in form centerless as my trade ...

Very nice machine. If only I had the space and the budget. I'm ashamed to say I'm not a farmer so my first car and bicycle aren't in my garage :( btw, so many "giving a Tos" joke opportunities missed :)

We have an older TOS surface grinder :) A Cylindrical is from Kellenberger 57U - also as an interesting Austrian machine... an EMD "sinker" . havent found any info about this machine... i gues these were made in s small family business. early 90"s probably.... Greetings aus Ungarn .. Viel spass !

I know where I can get up cylindrical grinder here in Fairbanks Alaska that monster weighs more than 10,000 pounds I think you can cylindrical the grind about 6 foot long something about half that size would be perfect

Yep, you were right, now I’ve got to have one. 😂

lovely grinder ! I have also TOS cylindrical grinder but older one type 2UD. Iam about to buy the same TOS tool and cutter grinder BN 102. Would you want to make a video about it ? Cheers

Cylindrical grinders are used to refurbish car steering racks. I have seen them working, but i didn't thing that those are generic machines, they looked like dedicated equipment to me

This was really fascinating cheers! I’ve never really gotten my head round how something that gets eroded makes something so ultra precise. I mean how can it tell when enough is removed?

Now I wonder if my comment was ever sent (can't see it here). I probably found out where to get that missing part you were talking about.

závody Mělník lets goooooooooooo

I’ve got a TOS BN102C tool and cutter grinder, was very interested to see your friend’s. Any chance you could get a video or photos of all the accessories, I’d like to know if I’m missing anything!

It can be adjusted in thou of what millimeters, thousandths of millimeters? Wow That's insanely precise compared to an American thou

A cylindrical grinder is a great machine, but probably you’ll need to build the shop around it..

Hi, love your videos they are always interesting to watch. I don't understand the manufacturer of the drill press...can you please write it down? Thanks

Well, no... I don't need a cylindrical grinder. But it sure is one hell of a machine.

Wat a Beauty

Do you still have your first machine-fouling fragment? He does!