This Cummins Crankshaft Was Almost Scrap Metal...
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- čas přidán 3. 12. 2022
- This is the entire process of grinding and polishing a crankshaft for an L10 Cummins Crankshaft!
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I’m not sure you realize just how awesome a machinist you dad is. His skills are absolutely impressive. He is an excellent teacher too!
To me a great machinist is on the same level as a doctor.
@@WalkToPoland Agreed, and my father and grandfather were both doctors.
Begs the question if it's just more cost effective with time and money to just replace the crank rather than pay someone to do this who has a ton of experience in it. This definitely isn't cheap to get done by someone who knows his or her shit very well.
@@WalkToPoland You know it'd be kind of nice if steel could heal itself after making a mistake like the way our bodies heal after damage.
@@FinalFront they can weld journals to add metal.
The movement pattern of your Dads hand tightening the steady rest just the right amount while grinding is a true testament of a master machinist becoming one with his machine. It's a humbling experience to see this kind of dedication to the craft.
Decades of experience to be this great at it.
This type of experience is what brings out the best in the engine parts for peek power and durability
@@nexpro6118 yea, to me, this is the work of a million or two mile motor.
This video is beyond priceless. This is like watching magic and your father is the magician. I am 81 years old, have worked on automobiles and machinery much of my life, but have never seen such an excellent introduction to anything as complex as crankshaft grinding as this. Thank you very much for sharing this!
Exactly what I was thinking and what I would have said. Tho I'm roughly 10 years younger. This video is truly priceless.
I am 23 and watching this, haha. I have been enjoying these videos quite a lot and at the same time learning so many new things. My dad, grandpa, and a lot of my family are/were machinists, but sadly, I never got a chance to see them in action. My dad had a machine shop similar to these good folks until I turned 13, and we moved away, and he switched his line of work. I am also becoming an engineer, and I think watching and understanding how things are actually made/maintained/repaired is such a valuable experience that 90 percent of the engineers have no clue about. Kudos to this dad/son duo for making these videos!
i totally agree with you
These skills are extremely rare because it’s usually cheaper to simply replace the crank or even the entire engine. But when there is no other way you’ll need experts like this.
I've been a machinist/tool and die maker for 45 years and this is the first time I've seen a crankshaft ground! Thank you, it was a wonderful video!
Me too , and it's so relaxing and peaceful.
I've allways wanted to see the full procedure this is great
labor intensive for sure@@davidhamilton7628
As a retired tool maker he didn't know what size radius he had only that it was similar in size to his radius gauge this radius on crank prevents cracks from forming when under stress we always ground radii on punches and other tooling that were under stress but on profile tooling if specs. called for .250 radius we ground that dimension to .250 plus or minus .0002 to have proper punch and die clearance.
Спасибо за хороший урок. Вы настоящий мастер, который любит и понимает свою работу. Здоровья и благополучия. Жду новых видео в этом году!
Fantastic video I'm a retired 35 year diesel mechanic, all the parts we put into the engine are nicely wrapped from the machine shop and ready to go. I never knew until I saw your video how much time and precision goes into getting those parts ready. I guess I'm trying to say it's machinist appreciation day. 😀
Awesome 😊
I saw no mistakes. Only happy little accidents. Watching this man set up a machine and work is comparable to watching Bob Ross. So educational, yet relaxing.
I think it is around 31:21
@@tablekwan with all due respect.... You misunderstood my comment.
And you can imagine some wispy little clouds on the horizon over there.
Working with Metal is closest to Bob Ross’s philosophy, but some operations you can’t go back and add metal back
@@Len_M. not according to our friends who like to do everything while wearing sandals and squatting in the dirt, if you know what I mean😂😂😂
This is so impressive. We need more guys like him around these days
this guy belongs to a vanishing breed, people who know how do things.
Watching your Dad is like watching my Dad when he was still here. From lubing the chucks to the way he explains everything. Brought a smile to my face. I was lucky to have a wealth of knowledge just like him.
I absolutely LOVE how clean your shop is. Most machine shops I’ve been in is an absolute cluster f**k. If I was local I’d feel confident hiring your service
Yeah one of the first machine shops I worked in was a filthy clusterfuck. Piles of tools, parts, everything coated with a thin layer of grease & metal shavings. I offered to clean it as it was making jobs take longer always having to search for things. Shop owner didn't want to pay me to clean it, so I cleaned it on my own time for free.
I’m glad I found this channel I believe I’m just south of their shop . Not many good machine shops around anymore. I’m impressed by the care they have taken in machine work .
In Switzerland you could eat dinner off the machines.
It might be worth shipping parts back and forth.
I ground crankshafts for many years using a Berco RTM 300. Loved the "stabilizers" between counterweights! I even had a little umbrella shade on my Arnold gauge too. You guys have made a great and fun video explaining this process. Thank you crank brothers!
67 year old truck driver here. The ART of grinding cranks like this has been a fascination since I was a kid and overhauled my go-kart's 5hp gas engine. The skills, talent and most importantly patience to do this job the right way, everyday! God bless you for your talent, and thanks for letting us look over your shoulder.
Thank you both so much for this VERY interesting video. As an OLD(80) yr. old 'gear head' from the big block era of the 60s, and a guy who still changes oil and greases the front end of my '02' Ford E250, I really appreciated the workmanship, and honesty shown in this video. BTW, I watched the tear down video of the 327. I rebuilt my share of small blocks way back when, that was a mess. Thank you for both videos. Sincerely, Bruce F. Raykiewicz.
We are all very privileged here to be watching a true master at work, one who is totally at one with his machine. SImply put, this is a grinding master-class.
Many thanks for taking us along on this job.
David in the UK.
I really enjoyed seeing you and your dad work together. As a young boy growing into a young man, I got to work with my dad who was an expert butcher in our butcher shop. There's nothing like learning a trade from a man that not only is an expert in his field, but loves his work and loves teaching his son to know the trade as well. I still appreciate my years in the market with my dad.
amazing. I'm so glad I found this channel. I lost my Dad back in 2010, and seeing you work so well with your father makes me smile.
I lost mine in 2007 and still miss the projects with him. Watching other dad's with there kids doing things like this bring back the great memories with mine, no matter what the project was!
I had never seen this done before and had long wondered about how it is done. The attention to detail and personal dedication to excellence that are required are simply incredible! Hopefully there are a few young people out there learning this from experts like your dad.
Me! 🙋♂️ 23 and an engineering student. I found their channel and felt like I struck gold. Invaluable knowledge for all engineers who design the darn thing, haha!
I used to work at cummins JEP putting those cranks in the ISM and ISX engines. What a great place that was to work. Dunno what it's like these days but it was utterly astounding how good the workers there had it. Quality was absolutely amazing also.
I suspect your father was extremely disappointed in himself with the mishap leading to the chatter, but the true professional in him did a great job in recovering the crank. I hope in time under his tuition you inherit his wealth of skill and knowledge and can continue to build on his legacy.
But I'd bet it would never had happened if he wasn't being distracted by the filming and live questions.
I bet he was glad it was on the first journal instead of the last one.
The amount of work that goes into setting this up is really amazing. I never thought about how complicated grinding a crank could be.
I was thinking the same thing. I had 0 idea that it was that complex or took that much time and knowledge to grind a crankshaft.
@@imacgst27 cam's are just as bad if not worse depending on the grind.
My father was an auto machinist for 50 years, being an instructor toward the end. I always saw him by the crank grinder and heard his stories about grinding cranks but never saw him set one up. Real interesting on how it all comes together. Thanks for the video.
I could honestly say I’d learn from you any day. A true leader is a teacher knows knowledge is power. Bless y’all.
That cleaning guy is really getting the hang of that crankshaft grinder! Seriously, thank you for showing us the entire process of grinding a crankshaft. We appreciate the in-depth content!
After watching these videos I really appreciate the level of precision and skill that goes into machining engine parts. I also understand why it costs what it does. Love the videos you guys!
One of the MOST Interesting Videos I’ve watched.
I always thought machinists were very very smart operators. Now I know how important they really are. I’ve had several cranks ground but never realized how special they are. Thank You Thank You 😊
I'm just finding you guys and my goodness I love this. I'm 4 years into working with my dad as a diesel mechanic, so we're a father son team doing the before and after of your work here. He has like 45 years in the industry and he's been a great teacher too. Keep it up yall
Amazing to see how willing and happy your dad is to do this work while being filmed and asked numerous questions.
As someone who dabbles in machining quite frequently on an engine lathe, I have an enormous respect for his ability to maintain focus and tight tolerances under such circumstances.
It's so easy to become distracted and make mistakes when you're trying to hold tolerances to tenths of a thousandth.
Mad props to both of you!
I think Jim would be a great instructor at a training facility. He explains things so well. We need to pass on the knowledge he has before it is lost.
Most people have no idea how much work it is to hook a crank on the grinder for such small grind work. The setup will easily eat several hours - I can certainly appreciate the work involved.
Thank you for this content! As a regular machinist for nearly 30yrs, I've always wondered how cranks were ground and never have seen a machine like this. What an amazing piece of equipment!
I have a totally deeper level of respect for the engine machinists that did work for me when I was building engines in the 70’s - 90’s! Thank you for opening my eyes. Your shop would be my go to shop if I was still in the industry.😊😊
I'm an engineer that occasionally machines things. The artisanship and professionalism shown here is extraordinary, thank you for sharing!
Been a Ford mechanic for 30 years and this is the work I never saw, very informative and interesting 🧐 thanks 😊 😊
I've seen quite a few guys that consider themselves machinists but your dad is up a few levels! Quite amazing attention to detail and beautiful result - could spend all day watching. Best wishes from the U.K.
Love your work,guys.
I trained as an engine machinist/builder at Cummins in the late '80's.We did everthing in-house except for crankshaft grinding,,so it was good to see a Cummins crank getting machined correctly.
Alll the measurements and magnaflux was done by us. To measure the fillet radius,we had different size spheres attatched to the end of a thin metal rod.Our magnaflux was the biggest in the southern hemisphere,300 volts d.c.
This was at Cabramatta(aboriginal word),Sydney,Australia.
Subscribed!👍
Thanks for showing the whole process. Crankshaft grinding is one of those "black magic" processes that your Dad has spent years learning. That crank is probably more consistent across each journal than it was out of the Cummins factory. I don't think the small drop in bearing size will really matter.
Ive heard of people boring one cylinder out of 8 and runnin it for a long time
Great video!! My father ran an engine machine shop for 40+ years. He use to do a lot of crank and cam work, and there were many cranks that came in he used the Eutectic spray welding on to bring them back into spec without taking too much material off. Grinding camshafts was the coolest thing, he use to grind a lot of custom profiles and lobe separations on them, use to build them back up if they were worn too.
I would love to see that process
This is gold. I missed my calling early in life. This kind of work is what I should be doing. Really appreciate the time and patience you both put into sharing your craft and profession. It is something to behold.
My god..i guess i was wrong when i asked my math teacher" when am i going to use this in life?" You guys rock. Love your stuff
Chatter is always the main enemy in turning these large cranks.
Thank you for the demonstration of crankshaft grinding.
I also subscribed and look forward to more similar demonstrations.
Just found your channel thru your tear down of Scanner Danners engine. My father was a tool and die maker from the 40’s, 50’s and 60’s, I turned out to be an auto technician, 50 plus years and still doing it, and my son is a welder. A family of tradesmen. This was extremely interesting to me and all I could keep thinking of was the engineering and design of the grinding machine and lathe. Amazing.
Wonderful! It is apparent that this gentleman is an artist and the machine is his instrument, as if he's a musician. He tunes it and accomplishes great results. I am reminded of my grandfather, back in the '60s, as I'd watch him work in his home shop. I wish I'd learned more from him at that time. Thanks for a fascinating video.
You guy’s are amazing to watch. You’re dad knows what he’s doing and cares about every single thing he does. Around here we all get scared when we have to take something to a machine shop because we aren’t sure what kinda hack job we’re going to get back. Keep up the good work!
Facinating to watch. Seeing a crank spinning off center when doing the rod journals messes with my mind! Great camerawork on your videos too!
I’m 69 years old. Upon graduating high school in 1972, I got my first job at Brandon & Turnage Race Cars, an automotive machine shop in a suburb of Nashville Tennessee. Being a hot rod enthusiast, this was a dream job. I enrolled at Nashville Vocational Technical School at night, taking machine shop. Would love to share more but will just say that decade was the best one of my life. Fate dictated that my final occupation would be in the culinary world, but understanding machine-work and developing a “touch” for it has carried me into the higher echelon of the cooking world by developing said “touch” in my chosen field. Ran across this channel and subscribed immediately, realizing that a part of me still is an exacting machinist. Seeing some of you guys’ machines awakened that dormant self. Many thanks!!!
I really admire all the precision you and your dad go through to ensure you've done a good job. Don't tell me it's good, show me its good.
How well you and your Dad look our for your machines, is a sign of why you have PRECISION in your shop! Good job, and have a most blessed Christmas!
I went to Cummins and watched the cranks made from a lump to the finished crank. Then it went into a block that was also a lump. What a day!
Im 60yo was raised by my father who grew up on a farm so I know how to pull off all the crazy ways to keep an engine going (aka backyard hack). watching your videos is truly amazing...
I love the way your dad is meticulous about making sure it's right and the fact that he teaches speaking out loud of everything that he does that is awesome
These lessons from your pops are incredible.
He's a solid machinist, I'm glad you're getting to have this kind of life and experience with him.
Best wishes to you both and thank you for your time and information!
You guys did a great job with this video. I was in the machine shop business from the mid 80's to the mid 90's in west Michigan. All the information that you were mentioning on the setup brought me back to things that I totally forgot about a long time ago. I spent my time on a van Norman about same color as yours. We did everything from BS engines to big diesel. Thanks again for producing a video of the trades and craftsmanship that are not seen so much anymore.
That is years of experience there speaking. Nothing better then a machine shop that knows every little thing like this about just about any engine and what's best to do for it.
It was a pleasure and honor to watch and observe the master at work. Great job. Im always amazed by the skill and knowledge it takes to complete this type of work.
this long format is awesome. I've had a idea how its done but seeing how much really gives me a new appreciation on how much work has gone into parts i've sent out.
This is probably the most fascinating video I have ever watched. That
Clean up Man Sure is one
Smart Guy, !!! Lots of knowledge and Skill in Dads experience.,
Great Video.
I have watched many machinists. You are very good. I once worked for a lumber mill who had in the past had run steam engines and they still had all the tooling. My office was right above the main machinist's workstation. I could stand there forever and watch him work. It was a pleasure, just as watching this man work.
Fascinating work- you present your subject with such entertaining clarity- I would watch you experts at work all day! Always wanted to know how cranks were ground and how they were balanced and you've demonstrated them both so well. Thank you!
Your dad preserving motor windings by starting the wheel in sequence... exceptional attention to detail and acknowledgement that the tools he uses need to be respected!
I love this channel please give us more 4.2 Jag!
I believe that machine is over 30 years old as well... it looks to be in excellent condition. You can tell he absolutely takes pride it what he does and his machines.
My father used to wrap rubber inner tube strips around the journals , 4-7 wraps on each journal to aid with vibration.
Every time I see a video of yours, I completely lose track of time. I look at the clock and think something... Another hour has passed 😅
Better than any movie watching you work.
You actually get the crankshaft closer to the correct specs than most engine machinists I've seen in 20+ years. You are a inspiration to be better than it will do
Begs the question if it's just more cost effective with time and money to just replace the crank rather than pay someone to do this who has a ton of experience in it. This definitely isn't cheap to get done by someone who knows his or her shit very well.
@@nexpro6118 In some cases it is cheaper to just buy a new crankshaft. With something like a 5.9L Cummins it'll be $800 - $1000 for even a cheap Chinese crankshaft. Whereas it'd probably cost $200 - $300 to have the original crank reground.
Which I've had such bad experiences with the cheap Chinese engine components that I'll personally never use them unless I absolutely have to. I've seen so many pistons, cams, cranks, connecting rods, bearings, etc. that are either manufactured way out of spec, made out of inferior steel/aluminum, or both. If it's something like a carburetor for a lawnmower then they usually work fine, but for a big 130lb Cummins diesel crankshaft...there's no way I'd take a chance on it.
@@FinalFront thank you for the response!!!!
Then, the machinists in your region are shit. There is no other correct specs than the right specs.You either get the correct specs or you fail.
@@mihaigheorghiu9071 I have trouble getting a head shaved properly. I found a specialist now but I have had 3 heads destroyed
My dad was a machinist in the Apollo and Gemini Programs. I never saw him work because he died when I was 13. Watching the careful precision exhibited here shows me how a brain matched with skilled hands guided with keen eyesight is a beautiful thing to watch at work. You cannot have a bad day with a headache or physical impairment and do this job with the high level of skill exhibited here. This is what awesome looks like.
The true meaning of "They don't make them like they used to!" Unreal to see true talent of you guys work your magic and appreciate the attention to detail!
watchin your dad account for the slack between the threads each time he turn s knob (not just for the ready rest) brings joy to my heart. truly a master. please shake his hand for me.
I have not finished watching the video, roughly half way through. It is my favorite so far. Great dynamic and the wash guy breaks it down so well. You guys make great content.
Loved hearing the crack check bell ring. Machinist music 🎶
I wish I had one tenth of the knowledge and experience your dad has. A genuine artiste!
I am a motor mechanis that has been around machine shops but still did not realise how complex the older manual grinders were and I did not think a crank of that size would flex. I love to watch you work.
Thank you so much for a great video. I loved how long it was and how much you explained in detail for all of us. After every video I always say, I wanted to see more lol. Thanks again to both of you for showing that there are still people out there that have pride in their work. Definitely far and in between these days.
Thank you for the endless hours of videoing, editing, and uploading. Allowing us to see the tedium and nerve it takes to properly prep engine parts. Through all the perceived blemishes, I personally see greatness in what your doing. Thank you for allowing us into your business. Luckily there are tolerances, and your providing enrichment in my life. 👍👊🇺🇸!
Man you are so lucky to have an excellent father like that. Next project I am sure to call you up and get things done by you.
I'm incredibly impressed by the attention to detail, bravo. Whatever you guys charge, it's not enough
So interesting to see the time and effort involved with machining the engine parts. Great job guys.
I can remember back in my teens taking a motor to a local machine shop for to have it bored and decked and the place was a page out of history. From talking with the old timers there they started the business for model As and such in the 20s and watching him work on my SBC from memory was a thing of beauty. Place was messy but their work was impeccable. When I got home I checked their work and couldn't find a variance over .0005. After that anything I had them do I didn't waste my time making sure it was right.
That .002 crank flex was crazy!
Geeeez Oh !!!!!
Amazing video! Someone who has mastered their craft. I hope we have enough people in this world that can carry the torch and continue to pass along this level of expertise.
Would definitely take experience to know the difference between center line of those rod journals and journal runout. Very interested how you set that crank up for grinding.
This was worth every minute! I love watching you guys and have been watching ever since the Pontiac engine you guys rebuilt. I’m an automotive mechanic, so I see more nitty-gritty than this, but I love the work you guys do!! Keep it up 🤘🏼🔥
I have always wondered how this was done. Wow. Takes a lot of knowledge and skill to do this. I sure hope we are training the younger generation to keep this skill going.
It's nice to see the whole job done, even when it doesn't work out the way you want. My worst one was grinding my second crank in a long day. Got it to size and went to move the crank to the other side of the journal. Turned the wrong handle and drove the grinding wheel into the journal! Second undersize for me too - and a change of shorts!
Niesamowita praca ! Doskonały nauczyciel który potrafi w bardzo prosty sposób wytłumaczyć wszystko od podstaw. Nie ma żadnych w wątpliwości że jesteście profesionalistami w swoim zawodzie. Podziw i szacunek za wspaniałą robotę. Pozdrowienia z Polski.
Love the content! From a marketing pov, you may want to A/B test just posting the video.
A premiere sends the notification when you first schedule it, but from the audience pov, it’s just a false alarm. Then when I try to find the video again in my notifications/subscription feed, I have to scroll back days to get the video. I’ve heard that creators get better notification stats and click through rates by avoiding premieres. Just something to consider, tho I saw your comment about engaging with the audience live and that’s valid too.
Either way, you guys have been a part of my Sunday evenings for a while now. Love the consistency!
I’ve tested both, and I find to have better luck with premiers. I understand it being a tease when it announces it ahead of time, but it also gives the audience time to plan their schedule in advance to make room for watching the video.
From my perspective as both a creator and a content consumer, I don’t get why people get so upset over the content they get to consume for free.
No different than a movie trailer coming out 6 months before the movie actually comes out.
@@JAMSIONLINE I love the perspective. Yeah I don’t get people getting upset either. I guess consuming content is so low-friction these days that any minor inconvenience stands out? Idk.
Anyway, keep doing you man. I absolutely love the content.
I have no words left to describe the video I just watched. It was more interesting than the Netflix movie I was planning …..😂😂 Man your Dad has incredible skills but more importantly how CLEAN he keeps his tools & machine. Love how carefully he handled the grinding wheels change. Above all he invested in a very precise machine that is reliable to work in that 0.002mm to 0.5mm range is just awesome. Love his focussed concentration on job while able to speech teach. You got a diamond right there. 👍👍
Wow my mind is blown away with how much flex is in that heavy duty diesel crank! That trick you showed us with the nut and bolt to tension up the throws of the crank not being machined was cool as hell. Thanks!
Fascinating stuff. Never seen as step by step informative video with lots of tips from an experienced machinist.
Love this. What a great guy to learn from. And to think he’s just the cleaning guy!!
My goodness..The volume of knowledge is astounding !
The most detailed video that I ever saw about crankshaft. This man explains every detail about his job.
It is more than a class to those who love professional videos. Congratulations for your job and thanks for posting a video so good as this. This is 52 minutes well spent.
incredible how much work and precision and knowledge it takes to grind a crank.... and to do it correctly and precisely. Your videos are always fantastic but what's more amazing, is the skills of your dad.. he leaves me in awe at the quality of his work. And one knows he's a master at work when you know how much experience he has at grinding a wet noodle lol
Begs the question if it's just more cost effective with time and money to just replace the crank rather than pay someone to do this who has a ton of experience in it. This definitely isn't cheap to get done by someone who knows his or her shit very well.
@@nexpro6118 well, good quality cranks aren't cheap, but depending on the availability of say an off the shelf crank, you could buy a new one but you may not be getting the same quality forging or casting as the original, regardless of the brand name stamped on it. There's the Chinese issue, most cranks (and everything else) these days are cast in China, and they're infamous for poor quality control, or just skipping steps altogether... Many if not all cranks availablr in the U.S. may be machined in-house, but they're still cast in China, so the Made in USA designation is not usually accurate. Look at the nightmare going on with flat tappet lifters today, you can't buy a decent set anymore, you're better off trying to find an old set of NOS or taking good, used ones and having them rebuilt/remachined.. So as far as cost effectiveness, being that the new stuff available today may fail very soon after a very expensive rebuild, and destroy other parts in the process... these days it's more cost effective to repair the old OEM stuff.
@@ratmousebastard what is the better metal(casting) crankshaft? I know just enough about cars to just get by on doing the basics on my own but thats about it. Ha
@@nexpro6118 what's better is anything not cast or built in China. Buy it from a U.S. forger, or a European forger, or hell, just about anywhere other than China. It's not that everything made there is bad, it's that there's just too much stuff made there that is bad... When a company uses a Chinese factory to build their product, if they don't have their own in-house inspectors there making sure every step of every process is carefully scrutinized to make sure the quality is up to the standards of the company that outsourced their work to them (say, an American company trying to save money), then you just don't know what you're getting. Most companies I would suspect can't afford to do that, so they just test a random sample of the product every say, every 1,000 units (or some sampling that is very small compared to the actual amount produced), which is not a good way to get an idea of how well your product is being made, or isn't being made. Plus there's so much corruption there, that it's not just a matter of bad quality control, it's falsified data as well... If you say buy steel from China, and you're expecting say, a certain alloy... a very specific alloy with very specific qualities, you expect the MTR data sheet (mill or material test report) that verifies the exact properties of the alloy you ordered... So you'd get something like element percentages for C at 0.28 to 0.33, Cr at 0.8 to 1.1, Fe at 97.3 to 98.22, etc. etc., but what you'd get may be different... in other words, they fudge their MTR data. When you get the steel, it's inferior, and can be quite dangerous depending on the application of what it's been fabricated into... If you expect a forged billet to make your crankshafts out of, and you get something that is below standard, you can't expect it to perform or last the same... You can machine it and it'll look right, but then it fails in short order. That's China for you... That's one big reason why everything built there is so cheap. And there's nothing you can do about it other than just not doing business with them. Most auto parts, the stuff you'd just go into your local auto parts stores today, are all made in China, and the difference of quality, or lack of, is sometimes so dramatic... Sometimes they don't even remotely follow the specs of the original product. American companies that have been known to produce the highest quality parts for decades, all of a sudden since they outsourced their manufacturing to China, has gone to crap... it's just garbage.
Love that machine. I've ground on three different machines from aircraft, semi, to hot rods and it is strange watching things being done differently, but I'm not used to a machine as yours. Grinding on centers is my favorite, that was for aircraft, and even that machine one had to bounce the steady rest to make the machine grind round. One time I did a crank so well, just for fun, the inspector was having trouble believing his instruments because they didn't move, something like 3 tenths run-out. Calculator! Never used one for cranks, pen and paper. I am a bit lost on metric bearing for standard cranks, why is that? And yes, I'd need a calculator for that. About the worst part of the whole process is getting the oil gallery plugs out, there is always one that is a major pain, sometimes every one. I was reading one thread, yeah, it should be side dressed, especially after mounting.
One thing I was taught was you ALWAYS dress the side of the grinding wheel. Your father dressed the radius, but not the entire side face. That's also why when the wheel touches the crank it chatters. Because the side of the wheel is not ground parallel to the side of the rod journal. I can tell from my experience in grinding without even looking. The sound the wheel makes when it contacts the rod journal shoulder is a dead giveaway. The chatter is caused by the side of the wheel not being ground parallel. What you are hearing is the high spots on the sides of the wheel contacting the journal shoulder first. The stones natural tendency when not ground flat is to deflect. That deflection with every rotation starts the chatter process and once that happens it's too late. Do me a favor. Have your dad take one of his indicators to the sides of the wheel and see how much variation there is out of curiousity
I'm not a precision grinder but learned the same thing from a guy who was.
The narrower the wheel the more chance it will set up a resonance and cause problems.
Seeing a brand new 4" wide wheel 20" diameter explode kinda put me off ever doing precision grinding (everything had been checked but there was still some sort of wheel defect)
Kinda understood why the wheel guards were such thick steel after that.
@@1crazypj that's true but not on the scale you're talking about when truing the side of a wheel. You're talking about taking off a thou or two. I was also taught to wash the stone wheels after each use with a hose. Reason being the water soluable coolant that is used can dry in the pores of the stone. Over time the water evaporates leaving just the cutting concentrate. This over a period of time will cause a heavy spot in the wheel and far worse harmonics than simply dressing the side of a wheel. Anytime you remove a grinding wheel wether on a crank grinder or took grinder you ALWAYS check all surfaces with an indicator once mounted. This grinding wheel is hard mounted on an arbor and not using a soft blotter paper like tool grinders. But an indicator will show you issues without having to remove material. I use special carbide tips on my indicators since the abrasive stone will wear flat spots on steel tips when used over time
Yup high school shop theory 10th grade
@@erin19030 if you watch the difference between the steady spark stream when the dressed face touches the journal vs. The intermittent and loud sparks and ringing created from the undressed side of the wheel touching the journal shoulder it's a dead giveaway the wheel sides aren't dressed
You can do the Robin Renzetti track of putting a piece of hardened, precision ground springsteel, like a feeler gauge (one you don’t care about) under your indicator need when indicating a stone to average out the surface texture
What a great way to start the day! Thanks for sharing your Dad's knowledge.
Thanks Jim, very cool, I’m an old truck mechanic and back in a day and we’re talking 1975 I used to work on Cummins 318s and what I remember most about them is that they used to snap crankshafts. I’m not a machinist I’m a mechanic.
This was an excellent video. Most people in repair shops have no idea what is involved with “simple” automotive machine work and the judgement calls you make on every job you do. I appreciate the videos & teaching you are giving this nearly lost art!
This was the best by far. I never knew there was so much involved in grinding a crank not to mention I could never again complain about the prices to do the work. I wish you guys were near me I build engines occasionally and I have to use a local shop, so far I been satisfied but I would rather use someone like yourself that take pride in there work. Kudos.
The one machine I don’t have but have always wanted. That’s the best and most detailed video I’ve ever seen on using a crank grinder. Looks like a nice clean and well tooled machine you have there
One of the best machinist I’ve seen. Highly skilled.Artist
To say that this is "oddly satisfying" is a massive understatement. As a truck driver both driving and wrenching on trucks, I've seen "in-frame" overhauls up close. My father created a trucking company and in those early years I was a grease monkey. Dad had a couple of crankshafts standing on end in the corner of the shop. They were for Big Cam 400 Cummins. He always said they were good and now I know why he believed that. The details of dialing in all of those measurements blows me away. What an awesome video! Couldn't take my eyes off it!! Thank you very much for giving me a better understanding of the inner workings of a great engine!
I've got a detroit 60 series with 850k on a rebuild. Bout due for another. This was super interesting.
I could sit and watch an artist like this man do his job everyday, something soothing about it
First time I've heard the explanation as to what it takes to set up a crank for grinding. I understood the basics but there is MUCH more to it than I or most realize. I won't be complaining on the price next time I get one ground!!! Thanks for a great channel. I've watched most of your old videos and the quality is getting better with every one you put out! Merry Christmas and have a safe and productive New Year!!
Ive been a tool and diemaker for 45 years and that was a beautiful example of how a pro can feel/know his machine.. Great Job !!