Shopmade parallels - Part 2

[@wrstew1272]

Always a joy to watch you make tools for your shop. As you are well aware, the prices are up there even for imports, and your careful explanation of the operations allows home gamers and underfunded beginners build useful tools. You are a valuable asset to the community!

[@EmmaRitson]

we learned a lot! thanks stefan. you make some exciting things. appreciate the time that goes into these videos.

[@Thunderbelch]

Very well presented, and it's awesome that you showed the various options for those of us who still need to get surface grinders!

[@jimmilne19]

Love your videos. They are educational, well recorded, pleasant in tone and practical. I look very much forward to each one and am thankful that you share your skills. I even appreciate the perhaps unintended link to Dörrenberg Edelstahl which appeared on your cell phone app. Best regards, jim

[@AmateurRedneckWorkshop]

A very nice project and a very nice product. Keep on keeping on.

[@robgerrits4097]

Very nice work and it is also fun to make your own tools, thank you for sharing it.:)

[@roleic7246]

Thanks for the different approaches meeting the needs of machinists with different levels of equipment and skills. If the hobby machinist community is to grow then the higher end machinists should indeed also include the entry level machinists. Well done.

[@JoggingWithForks]

Amazing video as always. Some really excellent information and great camera work too. Thank you for sharing.

[@KnolltopFarms]

Very cool little oven, I'm going to start looking for one...hardening materials is just so interesting to me with all of the formulas and such. Thanks for another great show, Aloha...Chuck

[@mattgatenby]

I like it when the Moon and Mars are in the right constellation with each other :) Things just work out then..... Thanks for another great video Stefan Cheers Matt

[@WildmanTech]

Excellent work. A pleasure to watch!

[@VinceSaluto1]

I continue to learn from your videos thanks again.

[@jjs4x]

Been looking forward to the second part of this video! 👍

[@mikewalton5469]

it was very interesting watching you make the parallels. excellent work and craftsmanship!

[@MegaCountach]

Very interesting video Stephane, I've gained tons of knowledge from you! Thanks!!! Doug

[@sblack48]

Love that small surface grinder!

[@howder1951]

Good video, nice subject matter, all parallel need to know for home shop guys like me.Thanks Stefan!

[@886014]

That is a very cute little oven, and perfect for this type of work. It was ironic how the made a point of mentioning the very same thing I did about moving the indicator/stand, yet we couldn't know what the other person had said!

[@firstmkb]

Thank you so much for making these videos! You include details that are left out of other videos, such as two spring passes for hardened materials, and reading the materials specs for hardening parameters, which is "retrospectively obvious." In other words, "Duh, why didn't I think of that!" Please keep the less expensive alternatives in your videos, even when you don't have time to show them all. I used to watch Norm Abram on The New Yankee Workshop (woodworking), and he usually had a tool for everything. In one episode, he glued up a tabletop and needed to flatten it, so I expected to learn more about hand planing. Instead, he ran it through his (sponsored) 36" wide surface planer, and didn't mention any alternatives. Boo, hiss!

[@BickDE]

Educational and nice Stefan. Bob

[@PhilsProjects]

educational as always Stefan. Thanks

[@stylianos4570]

Thanks!!!! You are doing great job!!! I wish you where near my neighborhood!!! Thanks for sharing your knowledge!!!

[@StraightThread]

Great video, Stefan. I like that you show alternate methods. Your dad was a tool and die maker? You have inherited talent in addition to your training. I'm sure he must be pleased with your work.

[@6NBERLS]

I don't have a precision grinder so I use a mounted cylindrical stone. Have to true the stone up first in my mill with a diamond point. Set the parallel up with a dial indicator for a minimal cut and then run the stone at the highest speed my mill can do. Because I make adjustable parallels, I only need to get one edge of the parallel straight. The mounted stone seems to do a better job than an end mill.

[@erikisberg3886]

Hammer peening 60HRC was new to me, seems very useful. I just wonder how they can grind the peened surface without problems? I use a roller peener for an internal peening operation, and as far as I know it is very important to do this as the very last operation. There is always something as a takeaway after watching these videos even if You think You know this stuff fairly well...

[@ROBRENZ]

Great video Stefan! I really like the straightening technique. I always thought tempering was mandatory even if you wanted maximum hardness. All the best, Robin

[@bcbloc02]

No quenching makes max hardness, usually the faster the quench the harder it gets. Tempering reduces hardness but also decreases brittleness. For most high carbon steels tempering is needed to use the steels in any load capacity or they will probably crack and fail, in this case as spacers it doesn't really matter since no real loads. Annealing is taking a material that has been hardened and taking it back to its softest state.

[@StefanGotteswinter]

I am not sure about the tempering to be honest - It might be nessesary to get out the stresses from hardening, but the parallels I made so far without tempering did not move over time. I want to get more into heat treating and that means adding a temperature controller to my toy-oven ;)

[@ROBRENZ]

I looked into it for that steel (AISI O2) and the tempering is mandatory with a minimum of 100C for 64RC and 2 hours minimum regardless of cross section. I only mention this because they say the un-tempered steel can crack just from internal stresses. I was waiting for the parallels to crack in half when you were straightening them but you pulled it off. Keep up the great work,Robin

[@eddyfontaineyoutu100]

Super ! Thanks for sharing !!!

[@jacktheaviator4938]

The same physics of peening can take the warp out of a slab of 4" thick steel 120"×120" The first time I saw someone going at a huge slab with a 2lb hammer, I said "that's gonna have zero effect" but you can pull a 1/2" bow out of a slab pretty easily. They have 120" Blanchard grinders at my employer, and the operators peen parts on a daily basis. They tend to be pretty warped after they are cut on the burn tables and then picked up and dropped a couple times with an overhead crane to separate the parts. The burn bay guys aren't well known for giving a damn about the downstream guys. I am a welder/fabricator, and I frequently have to bring parts to the press to be straightened. I can't peen the parts because I can't leave a bunch of pecker tracks on the part. The Blanchard operators are gonna grind the part anyway, so it really doesn't matter if the surface of the plate looks like a moon scape.

[@lawmate]

Nice video. One question, how come you used a small diameter end mill though? Wouldn't a larger diameter be stiffer and leave a better surface finish?

[@karlthompson1961]

Interesting and educational video, thanks.

[@bcbloc02]

Curious you say they dimple peen at work to straighten and then grind the dimples off. Since the compressive stresses from the peening is what straightens the item what keeps it from going "potato chip" once those stresses are relieved by grinding the peens off?

[@StefanGotteswinter]

Good question - I think the deformation from the peeining goes deeper into the material than the actual dimple that is put into the surface of the material

[@tyhuffman5447]

very informative. Thank you Stefan

[@gnborba]

Very good video!...This video gives me a lot of ideas of what to do with a few bars of O1 i have here! :D

[@heronguarezi6501]

I always say, we CNC machinist are like Olympic runners, we hear the loud noise and we start to run, the E-STOP is the finish line.

[@ghlscitel6714]

I wonder if the 1.2842 gives a good wood carving knife too. Any idea?

[@bigbob1699]

Try putting the parallels at an angle on the grinder so that you don't over heat the steel .

[@geirtoresimonsen8729]

Very interesting that peening, I would never think of doing that to a hardened piece. I am wondering about the measurements though. When you are measuring thousandths of a millimeter, won't just the heat from your hands touching the piece or your breath potentially affect the reading?

[@tcarney57]

I, too, am a son of a machinist (S.O.M.). For me, though, it's an avocation not a living. I really like how you model fine precision work while still allowing for "good enough."

[@MsKoffeinjunky]

Todd Carney Thats the only way to keep your mental sanity ;). Always working on the edge of what you can measure even with high quality machines really gets frustrating over time. When I was an apprentice we had to precisiongrind a watchmakers vice to 1/1000mm and Close to that in parallelism and angularity. The worst part was we millied the parts our selves 1year before and they were twisted and out of shape in all dimensions even with, what we thought at the time, was a lot of care milling them.

[@pierresgarage2687]

We never have too many parallels, you can order K type probes that get to 1000 deg C for about $ 5 to 10 from China, they have a stem around 8 to 10 cm. they will resist heat pretty well, this is waht I use in my own home made oven, I could send you a link if you need to... ;)

[@juanrivero8]

I assume the numbers you give for acuuracy on the surface plate are .001 mm. That is one micron, unless I have misplaced a factor of ten. Certainly well beyond the needs of the average home shop! I never saw hard steel being peened before. I did not know that it could be done at all. As usual I have learned something. Thanks!

[@TheMetalButcher]

You make it hard for us to know you appreciate us watching. :P Only one single frame.

[@TJ-ed8xg]

Should you not use more Oil to quench the parrallels ? It Must become too hot very soon, no ?

[@mertonsilliker3686]

Thanks so much

[@duobob]

Is the peening of hardened steel stable long term?

[@egx161]

Have you ever re-ground store bought parallels to improve them? What is the minimum amount of metal that a surface grinder can remove? Thanks. Great demo.

[@StefanGotteswinter]

The import-parallels I bought so far where all well good enough out of the box :) Smallest amount that a surface grinder can remove...thats more dictated by the precision of the downfeed ;) If you can get the wheel lowered by 1/1000mm, it will remove 1/1000mm.

[@CMAenergy]

I was always taught to put the bowed up and tap it down, but this is the first time I have seen it done the other way, Can you explain why you do it that way

[@StefanGotteswinter]

The technique i showed, stretches the material on the concave side and straightens it that way. Hammering on the bend facing up will either make it worse or you need to place the part hollow, so you actually bend it.

[@CMAenergy]

@@StefanGotteswinter I assume that happens only when the material is hardened. As I have always done this with soft materials, Thanks and I'll remember to try that next time i have a hardened piece of metal

[@jasonburns1407]

What cutter is it ceramic? And great vid

[@stylianos4570]

At 8:48 how much rpm are you running?

[@StefanGotteswinter]

1000rpm

[@johnpiettro4644]

I wonder how much could be achieved just with the milling machine and sandpaper. Well, the ground surface is missing from the set so obviously - not much...

[@MarkW321]

Cool.

[@alexanderburaga1907]

you can make ideal parallels with 3 plate method or hand scrapping

[@David_Best]

This was terrific. At some point, I'd like to see a video that discusses the different kinds of steel and their attributes (including relative cost, machinability, hardening characteristics, typical applications, etc.). The terms "cold rolled", "hot rolled", "tool steel", "low carbon", "high carbon", "alloy", "Mn Steel" are a bit confusing. Why do I care if a steel is cold rolled versus hot rolled? Which steels make good tools, cutters, dies, etc. and which don't. Thanks for all this.

[@dougbourdo2589]

Great resource for info & supply. www.metalsupermarkets.com/metals/

[@David_Best]

Yes, I've seen that several times in the past. And I buy my metal supplies there from time to time. But their info on all the metal alloys is vague, superficial and not helpful if you have specific requirement. Watch all their videos and try to figure out which steel you should buy to build a boring bar, or make your own countersink tool, or replacement shaft for your boat's propeller shaft.

[@frankmuller5649]

Perfect... now I wonder why I payed 80€ for my set? ;) Thank you for sharing your insights and experience... much appreciated... as always. Btw. I realized that you, once upon a time, did cnc-work... you sold the mill I believe... why is that? Got bored or just went back to the roots (and art) of metal working? If you don't mind the question? ;)

[@camillosteuss]

Shazaam, im late to the party, but as far as i know, he sold the deckel mill as it was not really a mill, it was his own frankenstein mill he cobbled from deckel parts, which made it not suitable for milling in any productive setup as the cuts he could take were shallow... i think the body of the machine was a borer or a grinder body, from like a deckel lkd, which made the table a non dovetail table that moved on a rail and a flat, which does allow for some minor milling, and its weight brings that up even further, but the whole setup was not optimal for any real work... Looked cool and dandy, but was a frankenmill setup and we all know that gut `n toight is the way any proper machinist rolls, especially german ones, so that got boring real quick and in a hurry... Heck, i would have liked to buy it off him if i had the coin for it back then, but alas, no cigar...

[@glennfelpel9785]

Absolutely Outstanding! Thanks or the straightening part, and showing it, I would straighten out if someone peened me too. Thank you for sharing this.

[@robertkutz]

stefan interesting video.

[@marceltimmers1290]

Hi mate. Ok, I think it's time to get or make yourself a balancing setup. Doing without, is not congruent with your normally very precise nature.

[@StefanGotteswinter]

Thats what I am going to do ;)

[@marceltimmers1290]

None of that bought rubbish for you ay?

[@David_Best]

Mit auf und scheibersweinstucker.

[@wportegijs]

why not use use one of the cheaper induction stoves to do a warmbad cooling? should not be to hard.... ;)

[@mertsilliker1682]

thanks for sharing your time and my money. lol

[@stylianos4570]

At 8:48 how much rpm are you running?