Na betonie, piach by tego nie utrzymał... Jakim problemem w ogóle jest ten piach na tym betonie skoro tego typu maszyna z zasady produkuje kilogramy opiłków stalowych?
I ground crankshafts many years ago always ground rods first then mains last ,as this reduced warp on mains due to stress relief on rods and having problems on rebuild.
@@33maple I'm sure in your racist country there are people sleeping on the streets, criminality, politician corruption, prostitution etc. etc. all the good things of a racist country.
If you are used to it, squatting like this is very comfortable - in western culture it's not common to sit like that, so the muscles and tendons shorten and make it difficult.
Almost all asian people squat since childhood, and some african tribes. If you never do it, it feels like something is about to crack. Some westerns can't even do the western squad :P
Seeing that crank being reground brings back memories of over 40 years ago. Thankfully I didn't have to put up with Pinky and Perky rabbiting away in the background........
Nice job ! ....but if you change the measurements on the crankshaft, how do you handle all the adjustment on the other parts ? bearings, motorblock, weight of crankshaft vs weight of pistons, con-rod.
You can grind a crank. It's done all the time. You get what are called undersize bearings. If you cut .010 off the journals you get .010 bearings which are just .010 thicker to make up for the metal that's lost off the shaft. They can check balance if they want after and rebalance but this is a work diesel engine so its not turning like 10k RPMs , it will be fine. Also if it was balanced from factory your removing equal amounts from all bearing surfaces so it should be close enough since your removing an equal amount of metal from factory balance off each journal.
One thing that I immediately noticed, the man who is running the crankshaft grinder, he is not properly trained on how to use a micrometer. You always tighten the micrometer with the thimble, never tighten the micrometer with the screw body. By tightening with the screw body, you never get a consistent measurement, as you would when using the thimble. Plus, tightening the micrometer with the screw body and not using the preset tension of the thimble, you stand a very good chance of springing the micrometer. Once that happens, you will never get an accurate measurement again and all of your crankshaft journals will be of different sizes and possibly way under sized, which will in essence make engine oil pressure lower than manufacturer specified minimum oil pressure. Even in spite of these deficiencies, very good video.
Good day fam, on my e30 2.9 stroker build, i machined my crank (328i) to accommodate 320i rods. So the engineering guy said the crank is machined to its last deck or spec, and further said that if i won't spin or race with the car i should be fine. So should i be worried that the crank is gonna last that long?
It has to be crack detection before any work is performed; if cracked, they will not machine it; i just googled and also got this, and a penetrant liquid and a white powder is used: *With a visible penetrant inspection, the process is the same; however, instead of fluorescent dye, a highly visible, colored dye is used with a white developer, which makes any contrast visible under regular light.*
Always makes me smile when i see footage like this. Crank prepped on a dusty bare concrete floor then slipped into a pretty flash crank grinder and the doctor begins to operate. Glad im not getting a vasectomy. Looks like big dollar grinder (for up those ways) but where is the piece of 1 cent sheet of cardboard on the ground or the cheap solid welded scrap steel bench off the floor to prep the crank or homemade parts washer?? Cleanliness is next to godliness so the saying goes!!! Regardless, bush style engineering still yeilds results but lacks finesse. Whats your thoughts??
That you have no idea what are you talking about? The young guy was cleaning out the grease/oil because that stuff is on a crank to stop grinding and that is what they are planing to do... How exactly you are planing to achive this "cleanliness" in lathe that by design is producing huge amount of steel particles? Where is the logic in your comment? Crank should be clean when its mounted inisde the engine as anything betwen the crank and the bearing can cause trouble/grinding!
@@Bialy_1 I was thinking the same that. That lathe is going to blow metal shavings all over it and fill the oil galleries with metal that will need to be flushed out.
There called undersize bearings. They make up for the thickness of metal removed. This is how we rebuild engines here in the US as well. .010, .020 , .030 are the common amounts to take of the journal surfaces .
Guy's, please don't take this as an insult. What we see on the television and in the media in the United States about the middle eastern countries, it shows very rural backwards villages that have no technology for making industrial products. From watching these videos, I can honestly say that your countries are being portrayed unfairly and incorrectly. From watching these videos, I can clearly see that your countries have real manufacturing skills and are a real contribution and asset to the world. You definitely have my respect for your manufacturing prowess and capabilities. I hope to see more videos like this one, videos that show western television and media as being biased towards and wrong about the middle eastern countries. Henry Ford, the founder of the modern industrial manufacturing and assembly line, he would be proud to see how much you work together, to make a refined and quality product. While I would like to see more work safety practices, I understand that personal safety gear may not be affordable or even available. I worked in the industrial machining and heavy equipment environment, hence the reason I mentioned safety. Even in spite of the lack of safety equipment and practice, you have definitely won my respect and I hope to see more of these videos. Keep up the good work. -Otis
Drama. Take the crankshaft, wipe it with a dirty cloth, put it on a dirty floor, fix it in a grinder. Start surface treatment, take a micrometer and use it for measurements incorrectly. After you finish work, put it on the dirty floor. Bravo - a very bad job. Someone teach him to use a micrometer - please.
People have worked under more primitive conditions for years on all sorts of equipment. They do as good as they know and it works. The old machines could have it done without a lot of fancy stuff.
@@CHRnorton The machine he uses is OK. In this type of work cleanliness is absolutely required. After grinding the surface should be cleaned oil channels, crankshaft should be thoroughly washed, if there are metal plug (such caps) should be removed and the dirt that has collected under them. It is with them that oil for lubrication is fed. Will this shaft will work - probably yes, but if the work was done properly such an engine would work longer, and so in 30000 km it will be overhauled again. Even with primitive methods it can be done better. Pressing forcefully during the measurement of micrometer damage its tips, which will cause large errors in measurement.
...and that's why it cost so much and takes so long to get your car fixed in America. You Ruben, should keep your ways to yourself. Or maybe you just realized that you don't need all of those fancy tools to get the job done. That you will be paying off Tool Truck bill for quite awhile.
@@davidwalker7383 Luckily I don't live in America .... In the country where I live, we know how to use the micrometer correctly, we respect our work and the client's money. I have seen many times what dirt can be removed from the crankshaft oil channels. You will not clean the oil channels (and there will be dirt in them), the oil will not lubricate the bushings, the shaft will seize. There are certain activities that are mandatory and they are not activities that require specialized equipment or cost a lot of money. Perhaps this shaft will go to someone else who will wash it, clean the oil channels. May it be so ....
@@rubens7498 Lets just say that you don't have any of those tools. Are you just not going work? Right! Your going to adapt and over come. These people have just as much if not more respect for their customers. Maybe pull your nose from the clouds and quite being a snob.
You have oil/grease on it to avoid grinding when its working inside the engine so you need to clean it off as they are planing to grind it and oil/grease on the element you are grinding gonna cause problems/slow down the grinding.
Looks like it's a support, may be brass or similar material to counteract, and apply opposite pressure or stabilise the crank during the grinding procedure. My thoughts only may not be factual.
Bravo au rectifieur. Les commentaires de merde,zéro. Il faut arrêter de croire qu'ici nous sommes des exemples. Oui,ce n'est pas nickel,oui des enfants travaillent. Et alors,il gagnent de quoi vivre,sans être assisté d'aides sociales et autres.
What do you expect from these people to build a sterile workshop like a surgical room, there are different realities, different money for such services. If you don't like it, why are you watching these movies? Show how you do it perfectly in your workshop. 🤬
Makes me sick seeing equipment go to third world countries. Nothing like work done in the US, we actually know what we are doing, we don't powder anything, nor do we cut corners like these folks do. I wished industry had not sold out to the lowest bidder.
Its Indian made lathe... so what are you babling here about? And they used powder to get rid of the grease, in USA they would use chemicals and i can bet that this chemicals and production of them are not very friendly to our planet. Also English language is part of the Indo-European family...
Makes me sick, trash assuming assumptions on top of assumptions, I will say crank grinding is more accessible and better in most instances THERE, than grinding here. Also, that crank grinder is MADE IN PAKISTAN. You can buy one around 13k. Air bright auto Company. That was an AMAZING crack check, Fine white power and hammer listening for dull tones or buzzing or any other signs of cracks. After Tinging on some cracked ones you would understand.
