Engineering Drawings: How to Make Prints a Machinist Will Love

[@tarkka]

Want more on Engineering Drawings? We just made a full 1.5 hour LinkedIn Learning course: Engineering Drawings for Manufacturing. You can find it on our website: www.tarkka.co/drawings Thank you all for the support, and we are coming out with more KZbin videos soon!

[@tonywilson4713]

As an engineer with 30+ years of experience the opening introduction to this is something I have preached for years. I did a degree in aerospace but have mainly worked in automation and control systems and have done literally 1000s of control system schematics and panel layouts. Look at a the description for this video "Making drawings is a skill that any practicing engineer needs to master. Unfortunately, it's not something that is taught very well in most engineering schools." *THAT IS ABSOLUTELY TRUE.* AutoCAD is brilliant and I love it but it has also caused a similar problem that Microsoft, Apple and others have caused with spell and grammar checkers. Its made engineers lazy and they DON'T CHECK what they have drawn often enough. Combined with the latest generations of CAM and CNC they just don't have to get a handle on things like tolerancing and functionality. I see this all the time in automation. Badly toleranced designs where EVERY tolerance is 0.01mm or 0.001mm (micron) which is fine when your doing a one off on a CNC. *BUT* if it has to be done by hand then you are spending vast amounts of time doing things with NO BENEFIT. Worse if its for production runs then you are adding unnecessary CNC costs (in time) to each part. Over in the control systems I see people make lazy blanket decisions on control wiring all the time and on large scale electrical and control projects the cost of copper (buying and installing) is sometimes as high as 70% of the entire cost. Big mine sites (and I have done a few) have incredible costs just in the power wiring and serious costs in the signal and sensor wiring. Most sensors need less than 30mA to operate so they don't need cables with 6 or 10A capacity. Most pneumatic solenoids operate less than 200mA and don't need wiring for 6 or 10A. As I keep saying AutoCAD and all the similar packages are brilliant and magical and save heaps of time and energy and grief, but like anything they can make people lazy and that never ends well. The part in the video where you talk about hand drafting is just so true. I see TOO MANY younger engineers who cannot do any drawing by hand. My favorite trick is to ask them where "layers" came from. I learned technical drawing just before CAD arrived so I have done it with "layers" of tracing paper. Great video keep doing this sort of stuff it benefits all of us.

[@Gottenhimfella]

Great, but could you use clearer voices? And PLEASE, do not mix background music with voice. Trying to make sense of it is like trying to read from a page with insects crawling over it.

[@tonywilson4713]

@@Gottenhimfella Well said. There are way too many people who think their sound track is more meaningful than information.

[@LT72884]

Is LinkedIn learning the same as Lynda? Because i have a lynda account from my school

[@ceooflonelinessinc.267]

Are you a couple?

[@pebbles4855]

I'm a mechanical engineer and former toolmaker and was expecting some clickbait, annoying youtube music video, but I was positively surprised. A lot of very good and helpful information for newcomers and unfortunately for some senior engineers too. Nice channel, keep it up.

[@RubSomefastOnIt]

Being a former toolmaker (tool and die here) gives you a huge leg up on most engineers with no shop floor experience. If I was in charge I would make it mandatory.

[@jc438]

It's nothing that they wouldn't teach in first month on university...

[@RubSomefastOnIt]

@@jc438 yup here's the guy that makes needlessly tight tolerances and super fine finishes on parts... it's all the stupid machinist fault it's not on time or in budget right?

[@JSBHP2017]

​@@RubSomefastOnIt Good universities actually do that...either your worked as a toolmaker, technican, electrician or you have to do an internship while you're studying...at least it's like that in Germany :D

[@jc438]

@@RubSomefastOnIt Why do you judge. Learning about design is actually led from the production point of view, as design is serving production purposes, not opposite way.

[@cesarvidelac]

That's an international problem now: "Most universities do an awful job teaching the concept". Here in Chile, the same.

[@Heatherder]

Its because they dont hire good engineers to teach. Most professors never grew up

[@sungvin]

Here in Russia, the same

[@nox_chan]

Same here in the United States

[@smeetashar]

I thought the problem was only in India; No one taught us Detailed drawings and everyone expects senior engineering graduates to be perfect with drawings.

[@sungvin]

@@smeetashar relatable

[@m3chanist]

The pace of narration...summed up very nicely........."tolerances that are unreasonably tight"

[@mmpiforall5913]

ah,..... ".00005" is one-half of 1 tenth of a thou! AKA 50 millionths !!

[@henmich]

But the software works to .001mm. Lol.. We deal with this every day. On a 3d model, we would get a fillet rejected for a tiny patch being .002mm under.... So we tell them an end mill will not ever go under that number, so you are safe, and they look at you blankly. This is what happens when people have NO shop experience.

[@henmich]

@@mmpiforall5913 Seems reasonable.... in a humidity controlled, temperature controlled environment, C0 ground/zero backlash ball screws on every axis, with prefect part/tool cooling and tools that are perfectly in spec and never wear down. Yup, that pretty much describes a machine shop.... HAHAHAHAHAA

[@Artydea]

@@henmich I've also had this, let's call it a bad habit, but then I understood that it was unreasonable. That probably looked very unprofessionaly, my thought was "so they can do 0.01mm, that's cool, let's place it almost everywhere, the part would be great" :D

[@mr_gerber]

@@henmich What software works to .001mm? CAM or CAD? 'cause I've never seen a CAD tool that hard clips at .001mm (I mean, it's practically useless, but hey.). It usually just rounds off to nearest .001mm

[@thepinwale]

00:00 - Intro 01:36 - Drawing template 01:51 - Title Block on Engineering Drawings 02:04 - Blanket tolerances in Title Block 02:30 - Revision table & Note section 02:45 - Coordinate border legend 03:00 - Projection systems, view orientations & alignment 04:12 - Hidden Lines & Tangent Lines 04:45 - Dimensioning - Size, Position, & Placement 05:18 - Assumed dimensions 05:31 - Dimension selection 06:17 - Repeated features 06:34 - Indicating tighter tolerances 06:52 - Geometric dimensioning and tolerancing 07:43 - Best practices about arbitrary tight tolerances 07:50 - Indicating Surface Finishes & Seals 08:03 - More on the Note sections 08:40 - Flag notes 08:48 - Edge breaks and burr removal 09:24 - Assembly drawings recap

[@slackstation]

It's 2AM. KZbin, for the love of God, why did you recommend this video? Now I want to design brake calipers.

[@blazianable]

Just discovered your channel via your reddit post and let me just say this is THE channel I've always hoped for! Don't stop making videos, they're very helpful!

[@bingosunnoon9341]

I worked as a draftsman, checker, engineer and even taught drafting in jr college. This is the best lesson I've ever seen anywhere. Excellent.

[@Oclb]

As a machinist I cannot thank you so much for making this. I hope all engineers heed this advice. I hate when a drawing is missing something and then I call the engineers and they get annoyed with me 🙄 like really

[@cfgosnell]

LAtely, I have had experiences where the model is given to the machinist and they are expected to find the missing dimensions by interrogating the model themselves. ASME Y14.41 along with Model Based Definition is supposed to help fix this issue, but I see it as adding an extra layer of complexity.

[@banquetoftheleviathan1404]

this is more of a drafting issue tho right? or maybe the engineers are giving the draftsmen bad instructions?

[@JB-dv7ew]

@@banquetoftheleviathan1404 Draftsmen and designers don't really exist anymore. I'm a mech engineer at my company and I literally do everything.

[@banquetoftheleviathan1404]

@@JB-dv7ew well fuck, guess I'll die when my boss does then

[@neo_tsz]

I'm not even in engineering, but I still watched the whole thing. Good job in condensing the information!

[@ChrisCiber]

I felt more informed by this one video than the entire Drafting/CAD class I took

[@UltraGamma25]

Same, youtube teaches you more than school does in 12 years.

[@Fragst3rDota]

@@UltraGamma25 Well maybe the german way to have a specific "vocational school" when you start an apprenticeship is not to bad. There u learn exactly this stuff and way more in detail than you do in university :)

[@UltraGamma25]

@@Fragst3rDota I agree 100% on the apprenticeship idea. It's why Tradeschools are better

[@benjaminkinga7797]

This is an under-appreciated channel. I hope you continue making more content

[@tarkka]

Thank you so much! We are working on more videos.

[@denisl2760]

My company needs to send all the engineers to remedial school and make them watch all your videos. "Hey so this part that I'm making on a manual mill has a 0.171875" dimension, are you sure that's correct?" "Oh yeah, just get it as close as possible it'll be fine."

[@bunnagautama3631]

because inches are stupid

[@williamnash4799]

@@bunnagautama3631 so you think if it were 4.365625 mm you could hit it on a manual mill?

[@jeepmanxj]

We have parts that have drawings with .001mm tolerances on counter bores. Shit gets me every time I see them.

[@jeepmanxj]

@@bunnagautama3631 In machining metric or imperial means precisely fuck all. You are working off of decimal numbers either way. You don't see a part dimensioned across multiple scales so metrics advantage is pointless.

[@davestambaugh7282]

In the past you never had to take drafting classes to be a mechanical engineer. When the computer drawing systems came out, they fired all of the draftsmen and gave the engineers software manuals. The software manuals do not teach fits and clearances. If you do not understand fits and clearances you can not properly dimention a print. Frenches Engineering, And Gisec Mitchell and Spencer were my textbooks from the seventh grade to navy illustrator draftsman A school. Fits and clearances is based in the principal that "two objects can not occupy the same space at the same time".

[@TabletopMachineShop]

I'd love to see a video on GD&T. I've just started learning it, and I can already see how powerful it is compared to just trying to control size tolerances everywhere. As an instructor put it "Tight tolerances just guarantee that a part will be expensive, not that it will fit"

[@tarkka]

GD&T position tolerance is coming up next!

[@avishai7830]

As a machinist, I thank God for this video! Sending this to all of the engineers I work with 🙄 How annoying it is when I have to deal with engineers with no machining experience who draw parts that are near impossible to machine. Thank God for you guys making detailed explanation videos!!!

[@preetamyadav7952]

I am also mechanical engineer . But i hate these drawings .

[@pravalkumar2124]

By far the most professional content on engineering drawing. Looking forward for more on GD&T.

[@thombaz]

Yeah, they use measuring tape when picking up reference point, indeed very professional.

[@TAH1712]

@@thombaz the machinist used the measuring tape for rough raw material initial placement. I agree it was quite a visual contradiction to see a tape rule and a ball edge finder in the same clip. - not the fault of the video authors. I started my engineering career as a glass working technician, doing a stint in the drawing office ... i have no other way than perfect undisputable drawings, to get the parts i want. Overall a good video.

[@thombaz]

@@TAH1712 I am just playing the a-hole. When I learned machinig and some one come to the calss with a folding ruler in his pocket. It was a good laugh when he grabed it for mesuring

[@TAH1712]

@@thombaz haha...

[@robertbohrer7501]

Ga Tech representing! Nice work!

[@StonesAndSand]

I believe every engineer should have to be a machinist / tool and die maker for a minimum of four years before starting engineering school. Some of the things I've seen from senior-level engineers would make my high school shop teacher cry.

[@brandons9138]

I worked at a shop where the owner had 2 foreign exchange student from Germany living with him. To get into an engineering program in Germany you have to have 18 months working in a shop before you can even apply to the program. That is sorely needed here in the US. I can't tell you how many times I've seen prints absolutely spammed with nonsensical GD&T call outs.

[@avishai7830]

@@1234hijs we get that it's hard. What we don't enjoy are engineers who think everything is possible in no time with no cost. We don't enjoy having to look at near impossible parts and being told "I thought you can make anything".

[@rubenmendez6065]

Lol good thing my engineering teacher told me about this already so I’m prepared and ready

[@MegaDoghair]

1:51 George P. Burdell (+ George W. Woodruff and Henry Ford)!!! Currently studying Mech Eng. THWG! That aside, this video is exceptionally well-made. The information was very helpful in filling some gaps I had from my engineering graphics course.

[@Andronicus1717]

Great video. I'm going to make this video a part of my on boarding curriculum for new engineers.

[@thomascapo6603]

G.P. Burdell.....nice

[@stevematson4808]

Wonderful video Now tell me how I can avoid having my drawings checked by my bosses incompetent son.

[@kaulincurtis9665]

University educators just say "you'll learn drawings in the field" and leave it at that. What am I paying for then?

[@evanparker]

i am a mechanical engineer, 11 years experience. i was waiting for some mess ups in this video but didn't hear any! excellent work. I especially agree about avoiding putting TYP everywhere on a drawing. Some of the older engineers really lean on that one really hard lol. the only thing i'd add is that regardless of what the standard is, some engineering places just have a house style, and even though it's not always correct correct sometimes, trying not to rock the boat too much is usually the best thing from an organizational perspective.

[@tarkka]

This is excellent advice that can be applied to many facets of one's career.

[@spec24]

Better listen again then. Per ASME 14.2: "Hidden lines should be omitted when their use is not required for the clarity of the drawing."

[@sethw9979]

@@spec24 there were some pedantic statements, but more often than not I find that the standard conflicts itself on such nuanced details of low importance. e.g. reference dimensions are described as *requiring* inclusion of the tolerance range specified by the driving dimensions, and also described as being inconsequential to the specification; that's incongruent.

[@thegavelissoundgavel9849]

I’m a retired toolmaker and Project General Forman in the marine repair/ large shipbuilding industry. I despise poor engineering direction. Most of which can almost always be broken down to poor attention to detail. These folks are solid. Only thing I didn’t like was their take on “typ”. I find it useful/necessary to clean up cluttered dwgs, say...items with many redundant specs like large flange bolt holes or tube dimensions for heat exchangers for example. There might be 12 typicals to keep straight but those could easily represent thousands of dimension instructions. I’d make my apprentices watch these guys as well as my jr engineers.

[@thegavelissoundgavel9849]

One reason us old guys lean on “typ” hard because printed drawings get folded on the job site and tended to wear away the ink in the creases. Reading drawings used to be much more interesting before screens became prevalent. We could just zoom in to clarify either if things got packed in to tight.

[@RandDickson]

My solid modeling class was 2 years ago and only part of it concerned drawings. Thanks for the refresher!

[@firstclassatlast5352]

I know I'm late, but my uni's CAD and machining courses were completely separate. So not many in CAD had ever seen a blueprint, and most in my machining classmates had never modeled in CAD. I did a crossover program.

[@SirDella]

Please work on your audio, there's too much high end (the s sound is too loud) and the music is at the same level as the rest of the voice, it's pretty much unwatchable on my phone's loudspeaker

[@anonymoususer3561]

You speak too quietly, and the background music doesn't help. Speaking at four words per second doesn't help, either.

[@anonymoususer3561]

But the video was good enough. The engineering way, ha ha

[@50Hz]

There is so many projects I’ve worked on where bad drawings caused the issues

[@michael7324]

As a former machinist, I thank you.

[@davestambaugh7282]

The term machinist is now used to describe both a machine operator and a machinist. There used to be a difference but they are kinda lumped together now. It's confusing.

[@michael7324]

@@davestambaugh7282 Hmm. I was both. I was a machine operator. (Basically baby sitting a huge plastic extrusion machine) and I was a machinist, making low production run parts for a small shop. This was 40 years ago. Has anything changes since then? Lol.

[@davestambaugh7282]

@@michael7324 Even all of the low production run part work is being done in China now.

[@ChefofWar33]

@@davestambaugh7282 There still is a difference. But usually, the machine operator still needs to have the prints so he can check the tolerances as he is running the parts.

[@davestambaugh7282]

@@ChefofWar33 When working as an inspector in a CNC shop I used to ask the operator what he measured a particular feature as when they brought me their first article. They usually saw no need to check the part since I was going to check it any way

[@drain_001]

I'm a mechanical engineer and this video was incredibly validating and informative, thank you :)

[@jorisdelguercio3753]

Please use SI units, especially for engineering application ...

[@IFearlessINinja]

We generally don't use SI for engineering in the USA. Doesn't really matter what system you use tbh, as long as it's all self-consistent

[@fluffymassacre2918]

I am not even an engineer but this was interesting

[@danielsantiagoguevara1695]

Thank you so much. This is a great video. I'm a mechanical engineer student and I've had to struggle with the drawings, I'm sure you're gonna help other students with your work.

[@gabrieldamian226]

"A lot of new engineers really struggles with making drawings, specially because most universities do an awful job at teaching the concepts". haha yeah I can relate.

[@francisdavis1271]

I'm actually curious as to how many graduating engineers have actually had a class on dimensions and tolerance? I think many of the younger people assume the software knows these things...

[@IFearlessINinja]

At my university we go over what tolerancing is, and how to look them up for fitting press fit, interference fit, etc. for pins and cyclinders. Literally nothing else, we assume we just guess the tolerances beyond that. I specifically took a course on GD&T to understand it better. It helped me understand how to utilize that whole system, but still nothing on drawing conventions, thinking about the machinist at any point, how to choose dimensions and what is unreasonable, etc. In engineering they hardly have enough time to fit all the physics, statics, dynamics, electrical circuits, robotics, thermodynamics, fluid dynamics, heat transfer, mechanical failure, statistics, math, etc. etc. I think the universities just assume engineers will be yelled at enough in the field to learn proper tolerancing

[@rubenmendez6065]

@@IFearlessINinja I feel like engineering should be a 6 years degree plan instead of 4 in order for it to cover everything

[@edwinmerino2147]

Best engineering channel hands down. Just stumbled across your o-ring video (knowing little to nothing about o-rings) and was blown away at the quality of information per second you were spitting out.

[@JoeSmoeDoeLow]

10:10 "most universities do an awful job at teaching the concept". Can't agree more, that's why I am watching this video. Thank you for making this!

[@MrTpain1945]

Bane of every machinist life bad drawings , All design engineers should do an apprenticeship as a machinist before drawing parts

[@br3825]

Wish I could like this more than once

[@avishai7830]

I wholeheartedly agree

[@mrteemug5329]

I started my job as a design engineer in April and didn't know squat about drawing. I learned more or less everything this video covered and more by constantly asking my co-worker's opinions on my drawings and reading the machinist handbook. I still make mistakes all the time, but I'm learning as I go.

[@ravikattakwal4960]

Quality, precise, exact to the point video....Great content. Please cover GD&T also. Thanks

[@ninjaabcde]

it sounds like this video plays too fast, I had to play it at 0.75 speed.

[@Raptorblitz1]

lol i thought i was only one!

[@-art3544]

New subscriber. Looking forward to more of your excellent videos.

[@amarissimus29]

This is very helpful, thank you. When I first had to create my first drawings, I struggled mightily with superfluous overload. I knew what I would want included but this seldom turned out to be what the machinist needed. The urge to just dimension everything ten times over becomes strong when you are frustrated. It took me way too long to discover how to chain dimensions properly. Even in retrospect, this information is valuable, so thanks again.

[@CorndogBrownie]

As a machinist that is transitioning into a mech eng. One thing to add to all of the things stated in this video is, If possible have the isometric view in colour if possible. Makes troubleshooting a million times easier, especially on assmeblies

[@davestambaugh7282]

I keep running into people who have no understanding of orthographic projection, demand three dimensional almost photographic half tone representations.

[@davisdesigns1153]

Thank you! you don't know how long this has been bugging me

[@philreed3983]

ive done better drawings on the back of my cigarette packets than most "actual engineers"

[@dinosoarskill17]

Thank you! I like the dual narrator style as well. (=

[@RubSomefastOnIt]

Want to be a great DE? Spend atleast a year machining and inspecting the type of parts you want to design. Ridiculous callouts for unneeded tolerance and surface finish are way to common, yeah yeah sure I can make it happen, but you are going to be waiting longer for it.

[@avishai7830]

As a machinist I wholeheartedly agree. Too many new engineers have no machining experience and think whatever rediculous bullshit they draw is machinable in zero time flat at no cost whatsoever.

[@freerideshuttle]

Even if this is all in imperial units and honestly pretty confusing, this cleared me up a lot in terms of what drawings should look like. My demand will be, how would you apply a taper or a 1 degree taper on a cylinder? And about the surface roughness (I used them in the past) but I don't know what the standards are, are there any providing tables that explain Ra, Rt, Rp.. allowed for mechanical surfaces and boring machining? Metric would help also. I'll also google it after typing

[@vincentli2090]

this video contains more than my 7 years in school

[@aidenbourman6450]

I'm getting profiled by the YT algorithm. I'm using this to procrastinate finishing all of my drawings for my cad class's final project.

[@ahopefiend1867]

I'm a 10 year machinist going to transfer to UMich next year.

[@tarkka]

That’s great, congrats! You may be surprised to see what is and isn’t taught in school, not a lot of application, mostly theoretical. But you can use your machining skills and enhance your education by joining a student competition team (FSAE, Hybrid or solar racing, many schools have robotics and aerospace competition teams too).

[@jacobhouston1655]

This is incredible content, guys. Keep it up! We want more.

[@mikewasowski1411]

Where have you guys been all my life?! This is amazing content. Thanks

[@3142857]

The heartbreaking part of drawings is when machinists dont understand standard convention.

[@Saki630]

0 experience here, never saw them in college, I cant even draw a circle or square on paper, and I do some of this stuff :)

[@trebushett2079]

Engineers aren't engineers just by being college boys. No-one who hasn't spent some considerable time in the machine shop should be making detailed engineering drawings, period! Likewise, college boy mechanical engineers aren't real mechanical engineers unless they have likewise completed a machine shop apprenticeship, anyway.

[@KISSMYACE3203]

I just watched this for the hell of it, very informative and will watch your other videos too; subscribed. I'm a welder by trade, and am wanting to further my skillset getting into machining and CAD, and this brings up a lot of nuances I do (but don't) think about, being self-taught. I've had many subpar prints, so there's a lot of things I think about/do to make manufacturing down the line as easy as possible. Field experience should be a must for engineers, it will make you better.

[@tjvanderloop1686]

The drawing is truly the language of industry. Today ASME Y14.5-2018 is common with "Geometric Tolerancing" as a true functional layout technique. A tolerance is best placed directly on the individual features. The part then can be applied based on the exact functional intent. Outsourcing to an outside manufacturing-shop is common with "GD&T" Geometric Dimensioning and Tolerancing. Your video is great! T J (Tom) Vanderloop, Author, Mechanical Designer & Consultant; ATEA, AWS & SME-life Leader and Member.

[@Philip_J]

This is actually an amazing small walkthrough of technical drawings, I had a class on it last semester in uni, and this is great for refreshing what I learned there.

[@yagwaw]

If you want to make your videos painless, please please remove the background music.

[@Crlarl]

Worst of all, a bad drawing will have the machinists laugh at you.

[@avishai7830]

Yes. We will do that. Or we get really annoyed. Or both. Please don't make our jobs hard 🤣

[@zoppp621]

1:58, Ga Tech Alumni?

[@markharrisllb]

My father was a fitter and turner who had very bad osteoarthritis from his time in the RN during WWII. So he had to be retrained as a draftsman of the pencil variety. My brother was a fitter and turner who after being made redundant in his late 20s went back to school and got his B.Eng MSc and then his PhD and he now writes CAD programs as he needs them. I was a chef, then did a law degree. I don’t understand what my father did or what my brother does.

[@MozwGamer]

I passed mechanical drawing with ease, learned the ISO norms. Now I'm here revisioning every theoretical subject and this video sparked me an interest to learn Asme norms.

[@Ra188]

everything was good until imperial units showed up

[@mr_gerber]

Are ASME standards in metric or inches? It makes most sense to teach the unit system that is compliant with the drafting standards they're teaching.

[@PT0B]

As a general rule, I enjoy: 1) Not wasting others' time. 2) Not looking like an idiot when it could be avoided. This video helps me to meet both those specs. Thank you!

[@ahndeux]

Minimum dimensioned drawing is preferred for more complex designs. You basically provide the STEP database model to the machine shop and have a default tolerance on the drawing. This prevents errors caused by the vendor remodeling the part based on the dimensions in the drawing. Any tolerance that is tighter than the standard tolerance would be specified on the drawing. Additional dimensions that need to be called out are dimensions referenced to anything other than the typical A,B, or C datums defined in the drawing. As for holes, we use a separate parametric table to show all the holes with a code. This way, a machinist only has to look up the hole code and the table for information. You can add additional information on the table such as geometric tolerances, inserts, and plating requirements.

[@kornbread5359]

Scribble scribble + “GOOD LUCK”

[@gsaarchitecturalmechanical5872]

Thank you very much for sharing this video, I am a draftsman and looking forward to my studies in Mechanical Engineering, please continue to post more videos like this

[@neail5466]

Nice, I have been looking for exactly this topic, nice narration, soft voices. A pleasure watching and listening. +1

[@learnitalready]

“A lot of new engineers really struggle with making drawings, especially because most universities do an awful job teaching the concept” - 10:10 Agreed! That was one of the largest problems that I had to deal with in both my design and manufacturing work. I received drawings all the time from “specialized” shops full of new grads that had no concept of what a good drawing was supposed to be like. After phoning them, they would say “just do your best to meet the dimensions”… but they didn’t realize that conflicting dimensions will make the part inoperable or not function correctly. Anyways, this is an awesome video! Thanks for producing it. Looking forward to diving into more of your work! 👏

[@maxmycroft8239]

haha such a clickbait title. machinists will never be happy

[@FletcherFinance]

Damn straight and don't try to change it either! :)

[@sarthak0diwan]

Just discovered this channel. Amazing videos. I hope to see more. Please provide a medium to donate.

[@555aboud]

Stunning vid! Would love to see more videos about engineering drawings and GD&T! You just earned a sub.

[@gerarbendfeldt]

I wish there are more videos like this for Architecture. I am an Architect, I don't know what I am doing here, but I love it.

[@hunterrobertson5369]

This is a great video - a great find for a sophomore ME

[@jeffw8218]

I'm not an engineer, and I'll never have to make drawings like these. But this is still a cool video.

[@balthazarnaylor5874]

tbh the best way to learn how to make proper drawings is to work in a machine shop. you learn really quick how to draw properly.

[@amarug]

I have a PhD in mechanical engineering, which is code for "I am absolute trash at making drawings". 😅 Thanks for this...

[@gerardmoran]

Excellent video. Sometimes it's satisfying to hear confirmation for even basic things you've always suspected but never been told.

[@richardchao3232]

Hello Tarkka, great video! Do you happen to have the pdf of the "Common Materials and Specifications" that begins showing at 8:15?

[@josephdegraffenried3976]

Great video! I'm a new engineer and found this to be a good refresher/reminder.

[@lassipls]

I'm finishing my second year of ME studies, and I'd say almost everything told in this video is news to me.

[@KrustyKlown]

In a few years 2D drawings will be obsolete, as the tolerances and surface specs will be data within the 3D CAD model, which will be used to make the part, and for inspecting it using scanning technologies.

[@trebushett2079]

Engineers aren't engineers just by being college boys. No-one who hasn't spent some considerable time in the machine shop should be making detailed engineering drawings, period! Likewise, college boy mechanical engineers aren't real mechanical engineers unless they have likewise completed a machine shop apprenticeship, anyway.

[@AlfonsGunawan]

Is this supposed to be played at 0.75x speed?

[@marcosjosfer4735]

Hello, i am a designer, work in the inventor, i liked the form how you drawed the notes in the assembly design, using the numbering formatting, but i can't do this without adjusting manually, how did you do it?

[@LT72884]

That hand drafter was missing her projection box in the upper right corner haha. I have had to draft many times by hand in school before they would let us use any shortcuts on the pc haha. Good video though, i liked it.

[@孙小圣-d8u]

查看并思考如何对高品质图纸的零件实施加工和检测是一种享受！

[@n00byWan]

As machinist i'm really happy to see some good work thanks a lot !

[@jawaring4367]

If you're doing this for 3d printing I recommend OnShape over Fusion 360 for free CAD software. Fusion takes FOREVER to export files while OnShape is instant, making prototyping take a fraction of the time that F360 takes.

[@mathankumarn1934]

Great video those who are in the design field thank you so much tarkka.

[@BrianHoff04]

As a 30+ year Quality Manager I couldn't agree more that setup, operators, and inspectors need good drawings to prevent mistakes & to make their jobs more efficient. One of the things I've encountered numerous times are drawings that do not take into account the measurement methods which will be required to verify the product is correct. I think design engineers & CAD folks should spend several months performing inspection to become familiar with the equipment & methods used to measure products so that they take into account the complexity, time & cost of inspection versus the needs of the designed product. Example: I've seen too many title blocks with Unspecified Angles toleranced as +/- 1/2°. I think in this video I saw +/- .25°... even worse. This will often be applied to a 45° chamfer. When a chamfer is .015" long (or less) it is difficult & expensive to measure the angle to an accuracy of 1/2°. This is the type of stuff that wastes time, frustrates floor personnel, and causes arguments about "when it matters" versus "it's just a chamfer". Had the designer considered these types of topics that arise everyday at the manufacturing process they would be able to provide more useful drawings to the employees that use them.

[@nchet]

excuse me, i want to ask something I have 4 Mechanical Drawings, all of them need to fit on one worksheet (I'm using A3), is it ok for me to use a different scale ? Example : Front Look 1:100 Detail A 1:20 Detail B 1:20 Detail C 1:50 (those Details are from Front Look Drawing)

[@Ajax4Hire]

Ha! Designed: G. P. Burdell. George P. Burdell had an office at Scientific-Atlanta. I know George P. Burdell, we attended many college classes together:)

[@darkshadowsx5949]

5:57 if i see a machinist measuring things with a tape measure I'll loose all confidence in their ability. those are better suited for wood than a precision engineering shop. use a scale (machinist ruler) if you only need a rough estimate. also LEARN METRIC. machining and CAD is so much easier using the metric system than dealing with fractions and long numbers like 0.374016 (9.5mm) you only have to remember 2 numbers instead of 7 in that case.

[@Tamalain]

As a machinist of housings for RF/Microwave filters, +/-.005, down to +/-.0001 is standard for me. fun times when tool wear takes it's toll.

[@jefflong9890]

(Quality tech) We can't measure this on the first article because we can't get the calipers in there... (Engineer) I know... that's why it's a reference dimension. (Quality tech) So how do you want me to measure it? (Engineer) You don't... it's a reference dim. (Quality tech) Ok so can you get rid of it? (Engineer)... NO because it helps the machinist for set up, ignore this dim and leave me alone. This is a once a week thing.

[@RFC-3514]

3:23 - In other words, what any normal human calls "backwards". I guess this goes some way towards explaining why nearly all manufacturing jobs moved abroad. ;-)