How Gears and Pulleys Work: Jeremy Fielding 103

[@a2handyman]

This world needs more men and fathers like yourself. Have enjoyed your videos over the years.

[@TsantoulisX]

Indeed! Same here

[@0ddSavant]

Totally agree. Not sure why I keep getting unsubscribed from you, but don’t worry - I’m diligent and I re-subscribe as soon as I notice

[@theguitarman22]

@@0ddSavant t3

[@ben_jammin242]

Too true. Like "from the goodness of [his] heart". Probably the first time I've said this about anyone on youtube. A real "teacher"

[@saxmusicmail]

Can you imagine the great engineering lessons his kids are getting? And learning in a fun way!

[@Silkroads733]

This gentleman is one of the most humble individuals on KZbin..so knowledgeable and articulate and great communication skills ..if he worked in a college or other institutional setting he would surely win a award.

[@_john_doe_]

Just thought I should drop a tip for cutting tubing. A plumbers pipe cutter, it's made to cut copper tubing but also works for brass, bronze, and aluminum without a problem.

[@vizionthing]

And you can put the tube on a suitable drill shank to avoid making that lip

[@NickSchade]

I use the same on small diameter stainless steel tubing. Note that a pipe cutter will still leave a burr inside that you may need to clean up.

[@Crazy5711]

Be careful not to deform the tube when using a pipe cutter.

[@tweedrhino]

Pipe cutter will leave a small collapsed area around the tube making it so the pipe won’t fit. I’d suggest cutting the brass tube with the aluminum rod inside, which will reduce collapsing and burrs and removing the aluminum rod will use the burrs.

[@gorak9000]

I would cut off a piece that's too long with a hacksaw, so as to not deform the tubing, then clean it up on a belt sander to both remove the burrs and get the length correct. Setup a fence on the belt sander table that's perpendicular to the belt, and away you go. Just slide the tubing against the fence and into the belt and take off as much as you need. Of course if you have a lathe, that would be better, but I suspect he doesn't have a lathe, otherwise that would be option #1 from the beginning

[@wildfire405]

In all my years of physical science classes and tooling around my work shop, I have never had gears, pulleys and see-saws compared so beautifully to torque and power. I knew all this stuff, but THANKS to this video and your explanation, I now FEEL the science and the math meshing in my brain.You turned it into intuition. I am not an engineer, but am a high school design teacher. I've shared your videos with my students before, but THIS one is one of your greats. THANK YOU Mr. Fielding!

[@deankay4434]

@wildfire405 > Years ago after nasty lumbar fusions, they stuck me teaching at UTI after years of fixing vehicles. I knew one concept requires three ways to explain it. We started with automatics & torque converters. We did the normal fan pointed at fan, then they lost it a torque multiplication. I told them say I have a 5lb steel ball on a 5 foot chain and swung it overhead and hit your hand. It would hurt? Yes. Ok, now the chain is 10 foot long swinging at the same speed! Now it hurts, but how much more? The few that had a hard time understanding how turning the fluid and redirecting it made more torque, now got it. Just like Jeremy’s teeter-totter example. It take different explanations for some to get it!

[@ogreunderbridge5204]

Dude, your life makes me smile. Thanks for the gears.

[@BiosElement]

Love what you're doing to showcase your inquisitive mind and articulate 'how' you think. It's vital to education and not everyone (aka me) can always explain it as well.

[@Jeremy_Fielding]

Thank you!

[@icusawme2]

I was taught a screw became a bolt when a nut was applied. Some screws never become bolts. Great content as always!

[@SianaGearz]

What if the nut is captive?

[@quintessenceSL]

I thought a screw can create its own threads in an object while a bolt will go into already created threads (discounting fastening and unfastening into the same piece). Alternatively, whenever I search for a fastener online, the common nomenclature will be opposite of what I think it is (I swear half the battle in finding something is just figuring out what it's called).

[@SianaGearz]

@@quintessenceSL Isn't that a special case - self-tapping screw? As opposed to machine screw that goes into a cut metal thread?

[@quintessenceSL]

@@SianaGearz Most machine screws I would consider bolts (you need to cut threads for them, either by tapping or a nut). Consider holding two pieces of wood together. The difference between screw and bolt are pretty obvious then. My point being it shouldn't matter what you are fastening. It is in how it functions. Hence my confusion in trying to find fasteners online.

[@RudyLib926]

@wade reed I love that definition. I usually look at the end too, screws are pointed and bolts are flat for the exact reason you say. But I don’t think a screw should ever become a bolt, it’s designed to be driven in verses threaded into a nut 🔩

[@TheProjectHelpDesk]

It's always fun to watch a self taught person excitedly explaining something that they love to do. Mad props on the build.

[@Ponymaster-ff4zc]

The combination of fatherhood advice and engineering is unique and beautiful, and it's just a joy watching your Videos! I hope i am gonna be a dad like u one day :)

[@fireballxl-5748]

Mr. Fielding, can't remember if I've ever commented but today I am compelled to thank you and say it is amazing how you have employed the talent God has given you and I really enjoy your videos. Especially your kind and pleasant demeanor is refreshing. God bless you and your family.

[@christystockman8643]

I'm an atheist so I'm not sure where his talent came from but I just like how you started out with Mr. Fielding. Upping the level of respect on the internet is always worth it. Thank you!

[@fireballxl-5748]

@@christystockman8643 Very kind of you to say so. BTW, you know no one but God can be an atheist, as only God knows everywhere God can hide. Thanks again for you very nice response.

[@lion-of-lucia1158]

​@@fireballxl-5748hello..can you describe your 'god" to me outside of any religious book ? Is it masculine or feminine ?is it one or many..does it have a chosen people ect..I will be wating for your réponse.. thank you

[@jeffkunkler9299]

The greatest praise I can think of is that you are a good father! I plan on watching this with my daughter.

[@stitchinginthebarn8307]

I just told my husband last week that I need to learn about gears! Thank you so much for this! I'm going to check out those links after I show this to him. Have a blessed day!

[@pawpawstew]

Head over to Mathias Wandel's site to check out his gear pattern calculator.

[@TheDevnul]

Matthias is another great KZbinr to follow.

[@GordieGii]

I'm just curious, how did you suddenly discover that you need to learn about gears?

[@brucevipond2222]

Excellent construction, video and fathering. My kids were involved with many of my projects and was such a joy. Now I have my granddaughter assisting and sometimes supervising me. 🥰😉😊

[@lukesalter-ec3hh]

Duuuude, I found your channel a week ago and it has really helped me break through the most recent threshold in my journey. Been a 5 year trip of self discovery and pursuing interest with passion. I hope to be where you are in another 5! Blessed be the man that helps himself! Best of luck, whatever you’re up to!

[@kinorhynch]

Hey Jeremy! I have been salvaging broken/unwanted appliances, and I have acquired many smaller motors. I know there are plenty uses for these, and I plan to build a mini belt sander, lathe, and bandsaw. I'm wondering if there is a way to combine them. Two ideas come to mind: Multiple belts or gears attached to a main shaft, or the motors attached to a gearbox type of mechanism. would love some kind of small motor salvaging video as they are everywhere, but if not, I still love all of your videos! I'm brand new to this engineering scene but picking it up fast and I owe it all to you! Thanks!

[@RADIOACTIVEMASCULINITY]

I love when you mention being proud of your son! Father son bonds are so special!

[@alans1816]

You are an inspiration, and a demonstration that talent, determination, and work will get you to amazing places. It is useful to note that for most people a standard education is an easier way to get there. Bolts and screws are interesting. The most common screw has wood threads (sharp to bite into unthreaded softer material or sheet stock) and a head with a recess (slot, square, hex, torx..) to drive it. The most common type of bolt has threads designed to mate with a pre threaded metal nut, and has a (usually hex) head driven from the outside. The head seems to have priority, in that a machine screw has bolt-like threads but a recess in the head. A lag bolt has wood threads but an outside driven head. So my impression without looking it up is that the driving recess in the head makes a screw, while the outside driven head makes it a bolt.

[@bobvines00]

I was taught that (machine) screws thread into a threaded hole while bolts are tightened with nuts (i.e., no threaded holes in the parts they fasten). I think I recently reread this in an Engineering text, but I can't guarantee that.

[@alans1816]

@@bobvines00 That sounds right. My suggestion was based on usage, but technical definitions are not always followed colloquially.

[@chitlitlah]

​@@bobvines00 Ehh... I've bought machine screws (according to the box) recently and used some with tapped holes and some with nuts. What you say suggests these identical components from the same box can be either screws or bolts, depending on how they're used. That isn't necessarily wrong, but it sure would make things confusing if I had to go to the store and ask for a box of both screws and bolts that happen to be the same thing. I can also think of many examples where something is called a bolt even though it screws into a tapped hole. I don't think there is a precise definition of a screw compared to a bolt, but I think yours is pretty far removed from how people would usually determine which is which.

[@bobvines00]

@@chitlitlah Yes, machine screws can be used either way. If I remember correctly, the terms bolt and screw are often used depending on how they will be used, but I think there are "technical" differences between them that most folks don't need to bother with. Typically people don't use the "correct" terms, but since everyone makes the same "mistakes" (me too), they are able to easily procure what they need.

[@GordieGii]

@@bobvines00 Yes, the technical difference is which thing you turn to tighten it. You turn the screw or you turn the nut. Lag bolts are actually lag screws. Hex bolts are often used as machine screws. Carriage bolts are practically impossible to use as screws.

[@SluSharkND]

Love the content and how you involve your children. "Here's what I need..." to your son instead of the "don't touch" and "you're doing it wrong!" that I grew up with

[@siggyretburns7523]

Its so cool to see the family working together. Thats what its all about. Youre a good man. Oh yeah...the clock and gear explanation gets an A+.

[@MattTrevett]

When you went from talking about levers to talking about pulleys, I began to understand how the block & tackle can increase the mechanical advantage. A pulley might be considered an infinite series of levers, the fulcrum being the center shaft. The two sides 90° from the "fully enroped" or "fully belted" end are where the work exchange happens, or opposing ends of the "lever". Thank you kindly!

[@jacknevitt7384]

Jeremy, this is a great explanation of gears and how they work. I enjoy watching your videos with my grandkids. Keep up the great (and interesting) work!

[@krypton1142]

I love this man a stupidly high amount. i dont think i can live without his videos.

[@scabootssca]

You're such a good dude and very smart too, world needs more people like you.

[@troyfernwalt6927]

I'm always blown away by the quality of your content. Thank you for the hard work and love you always deliver.

[@plepgeat]

I hope your children know how lucky they are, and I love to see how proud you are of them!

[@stephenmoncrieff2056]

As an auto mechanic I deal with a lot of this on a regular basis . I really like how you are able to explain all this in a way that most people can follow . Great job!!

[@tomboyd7109]

I remember having a clear plastic puzzle clock somewhat like yours as a kid. It had an adjustable pendulum and a main spring. I loved it. Your "proud of your kid face" being the same as your "regular doing stuff face" is a good thing. So very right.

[@JeremyMcMahan]

Amazing work of art. The "that's my boy!" non-smiles are some of life's best moments. Thanks for sharing this!

[@gradydavis3782]

You explain everything better than anyone else I've ever listened to. Either on line or any instructor I've ever had. Keep up the good work

[@megyesimoments8630]

I miss listening to my dad talk about all manner of engineering. (He did both electrical and mechanical engineering with pulp and paper applications). I greatly appreciate your skill both with manufacturing and also educating. Thank you for sharing your talents! And kudos to your kids for keeping their internal gears working!

[@pawpawstew]

5 minutes in and I'm thinking a multi-speed bicycle would be a great visual aid for this. The arm (length from axis to pedal) remains a constant. As the gearing changes. The force required to move the arms increases or decreases, while the resulting speed increases or decreases depending on the gear ratios.

[@mackdaddy.7610]

Hi I am 58 and just leaned the rubies cube and scan so it every time I pick it up now.im to old to go to school and too poor to have a good tools.i just make a still press. You are a great teacher and a good human being at far as I can tell. Thanks for all our knowledge.

[@toastthemost2473]

I subscribed as soon as he started talking. I cant not have this voice in my life.

[@280zone]

Jeremy, you should be very proud, you are building a true legacy.

[@briturner11]

my son is 2. and I CAN NOT wait for him to be old enough to help me in the shop. congrats on the family time.

[@dean9377]

Thanks man! You are a champion. I was blown away and very encouraged at the same time that you are self taught. It give me more hope that I could do these awesome projects too.

[@howardbaxter2514]

Based on your videos, I can tell you are a good father and good man Jeremy. Keep up all the good work.

[@cburgess5294]

You remind me of my late brother-in-law. He was also a great father. Thanks for the fantastic content!

[@jonathanholland5398]

Thanks for addressing kerf and showing your test pattern! Important, practical consideration and verification.

[@HomebrewHorsepower]

I always have to play cool when my daughter shows interest in making. I get super excited to teach her new things. She's only 7, so her attention span is somewhat limited, but for as long as she wants to learn, I'm thrilled to teach her.

[@AGeekNamedRoss]

You're a great dad. Awesome job engaging your kids in engineering! I love to see this. Great video!

[@av8rBlake]

Sometimes you can chuck up your tube or rod in a drill to cut, file, shape. Sort of like a hand-held lathe. You can also use it to spin a rod against a grinder to quickly make nicely shaped handles, etc.

[@by.aaronjellis]

Don't know how I just barely stumbled on your account, but I'm glad I finally found it. Great work!

[@NerdyMeathead]

Gears are awesome and all but I was way more impressed how your son listened to you without any questions at all. I bet his teachers are so happy he is in their class.

[@johncichon9499]

Thanks for the video Sir! I enjoy your good skills of communication as well as your creative mind. Excellent to encourage newcomers along. One thought from my experience was that a press fitted bushing will reduce the ID of the bushing. To use this to my favor, a reamer or a barrel lap could be used to remove a small amount of material once the bushing is pressed in (so it's easier to hold it while reaming).

[@Jeremy_Fielding]

Yes it does... but you are talking about really tight fits on both sides at that point. I only needed enough interference to hold a very light weight part in wood. If I was designing a machine from steel parts, and needed to heat the part to press it in, we have a lot more to consider. :)

[@vitaquasus1120]

You are so right about them growing up so quickly. Love this clock thanks

[@stevew3384]

Hi Jeremy and family, sincere greetings from New Zealand. My understanding is that a screw (or set screw is threaded all the way up to the head: a bolt has an unthreaded shank portion. I enjoy watching your videos very much.

[@onhandart]

It's been 25+ years since I designed a gear and you just reminded me of all those times I sat there pretending I knew what I was doing as an engineer walked by. I love the clock, by the way.

[@allenplant1702]

Very nice video! I'll take my shot at the screw bolt question: Screw - installed to a material with or without a pre-drilled hole. Usually pointed or cutting tip Bolt - installed in a material using either a nut or threaded shaft that matches the thread pattern

[@Flyer10254]

Loved this video! As far as the difference between a screw and a bolt, at least to my understanding, is that a screw is designed to use the material it is being driven into as its method of fastening, whereas, a bolt's fastening method requires a nut that clamps onto the outer face of the material through which the bolt is placed. So I would say the difference between a screw and a bolt is the method in which they secure to the material.

[@enetheru]

What if drill and tap a hole, would I the be inserting a screw or a bolt?

[@383mazda]

I thought that too at first (nut vs no nut), but then how do you explain tiny machined screws that they make nuts for? Or are they just named wrong? Lol

[@Flyer10254]

Firstly, excellent point. I think my definition for bolt is probably off as you would use a bolt for a drilled and tapped hole. However, when drilling and tapping you’re essentially making the material into the nut for the bolt. So, to refine my definition, a screw is designed to move the material and cut its own threads within the material. A bolt requires predefined threads, either within the material or externally with a nut.

[@GordieGii]

The difference is which part you turn to tighten it. You turn a screw or you turn a nut. It doesn't matter how the threads are formed, wood screw or machine screw. A carriage bolt is a bolt. A hex head can be a screw or a bolt depending on whether you turn it into a threaded hole or turn a nut onto it. A lag bolt isn't; it's a lag screw. Not because of the threads, but because you don't turn the wall onto it. If you use an anchor bolt you turn the nut.

[@SuperMurrayb]

This is great news. The changing rates of time flow has been known for centuries. Time flows quickly during breaks but then slows down to a crawl just before quitting time. A clock that compensates for these time flow anomalies is something many people would buy. Good luck with your new clock business,

[@dvoob]

watching you make this really makes me appreciate how difficult it must have been for watch makers using hand tools to make working clocks. AND they're so much smaller than this... insane

[@michaelwhitaker3452]

Good job and Well Done Sir! This kind of engineering is what makes projects happen with people happy to do the work. Your children are taught well I believe. Maybe they were just behaving for the camera, but I doubt it. That young man writing code for you is smarter already that 9/10 of the population, including myself. You’ve done well for yourself and your Family. 👍

[@Roy_Tellason]

For cutting small tubing I like my small tubing cutter, handles up to 1/2" or so copper pipe and works well on a lot of smaller stuff. Very clean edges, not much in the way of deburring required. For grabbing a hold of something ilke that without distorting it, get yourself a pair of _round_-nosed pliers. These are commonly used with jewelry, but I find them handy in all sorts of other stuff as well.

[@xenontesla122]

I was just about to mention that. You're talking about the type with a round blade that rolls on the tube, right?

[@bertjesklotepino]

@@xenontesla122 no. No sir. The blade is square. And it never touches the tube. But we call em pipe cutters

[@GoatZilla]

I think he could have solved that by just filling the brass tubing, cutting it, and then removing the filling. For example, temporarily glue the brass tubing to an aluminum rod, cut the whole thing together, then use solvent to pop the brass off. Also owning a small metal cutoff would have helped.

[@christystockman8643]

Fun Sciencey Dad! The best kinda Dad! I wouldn't say the see saw was ghetto I would say you showed your kiddos how to be resourceful! You can make anything outta anything with a good imagination and some old fashioned elbow grease. Love your videos!! Keep it up!!!

[@WonderfulLife135]

As always this is an OUTSTANDING Video Thank You!!!!!!

[@fl0yd13]

I always thought screws are the ones that need a screw driver (Philips head or flat head) and a bolt has a hex head or some other shape and you would use a wrench or a key to turn it

[@gorak9000]

Yeah, but there are socket head cap _screws_ that take an allan wrench. And if you say "screws are pointy and self-starting", then the counter example is machine screws and lag bolts. The only conclusion is the actual problem lies with the English language, yet again.

[@russellanderson3901]

Regarding screws v bolts, there is a podcast called Engineering Commons that came to a conclusion that screws are intended to thread into a material, and bolts are intended to be attached to a material via a nut. I have always liked their determination as it is dependent upon the use case.

[@alanclark988]

Always seriously enjoyed your work. Clocks are a big thing for me. Respect!

[@hanssenjones]

@Jeremy Fielding... 14:55 Just a suggestion if you may need to make those bushings later... You may be able to cut those with copper tubing cutters like Ridgid model 10 or 15.

[@crowznest438]

Gears are beautiful!

[@theodorearvanitis7269]

Thanks for great info and videos. I took your tips on finding used broken equipment. In one week I got a treadmill, fridge, 2 industrial carpet cleaners, vacuum, dryer and mini bike all for $free$. Being an auto mechanic I ended up spotting the failures without even trying. Everything was either some kind of short in wires except the fridge had a failed evaporator fan. I plan on putting the treadmill motor onto the mini bike. This will be a fun project.

[@ecospider5]

Variable pitch gears are really cool. Thanks for showing that.

[@lanmind1024]

Dude, you're awesome. I even appciated seeing the way you interact with your family, man.

[@jarodmorris611]

My oldest daughter just got her first job too. When the next schedule comes out, she'll have her first day. It's one of those 'no one prepared me for this' moments.

[@rassaye]

Just wanted to say I love your videos and this has inpired me to design my own clock over summer. Thanks!

[@johnwelter7081]

Another great vid. Gorgeous clock and fun watching you (and your son) move through the planning, building and hiccups. Keep on rockin'

[@LQhristian]

Great work, Jeremy!! You're on the way to making your own version of the antikythera mechanism!

[@adamrehling6971]

Awesome seeing the kids help you out.

[@mach1553]

9:25 A technique in gear making is a full hunting design. When engineering a gearset, the manufacture will add (or subtract) a tooth so the rotation will cause the teeth to always mesh onto every other tooth through the revolutions. This evens out the wear, preventing noise & vibration.

[@mithrandir1313]

Your most awesome quality is your family!! Good on You!!

[@hooligan1717]

Beautiful device built by a masterful instructor. Well done, sir!

[@mr_sheen_asg]

What an awesome design, I love the planetary gear you have used, planetary gears look so cool. 👍👍👍

[@andycampbell8290]

Another great video. The difference between a screw and a bolt is that a bolt will have an interference fit with the hole and a screw has clearance.

[@thomaswalters7117]

Based on the way the terms are generally used, a screw is any device with an inclined plane revolved around a shaft, while a bolt is a subset of screws, specifically the machine screw.

[@GordieGii]

What about lag bolts? What about deadbolts? Or the bolt in a rifle? Screws are tightened by turning them. Bolts slide. Threaded bolts are tightened by turning a nut around them while they slide into place. Lag bolts are actually lag screws.

[@thomaswalters7117]

@@GordieGii Words mean different things in different contexts. When discussing screws, generally "bolt" is synonymous with machine screws, even though your definition may be more appropriate for technical discussions. Also, my opinion is that lag bolts should be called lag screws, and lag bolt is therefore incorrect (although clear enough, in context).

[@GordieGii]

@@thomaswalters7117 When people say bolt they usually mean machine screw. I rarely correct people. The question was "what is the difference between a bolt and a screw?" That is a technical question. I gave a technical answer. Most true bolts are special purpose, so the word 'bolt' is preceded by an adjective, like a carriage bolt or plow bolt, although even in that context there are colloquial terms, like shear bolt, which is really a plow bolt, but with a certain type of anti-rotation geometry commonly used on metal shears. With regards to the origins of the words, you turn screws to make things happen, you slide bolts to make things happen. You can see my comment to the OP for many examples from the non-fastener domain.

[@thomaswalters7117]

@@GordieGii I am not questioning your definition, but it's important to understand all common definitions of the term. Since most people use machine screw and bolt interchangeably (and since the distinction is rarely important), that is an important definition to understand.

[@GordieGii]

@@thomaswalters7117 I disagree. I my experience, most people who don't work in industry use a hodge-podge of terms that they learned from their relatives and friends. Some use the thread type (like you) others base it on whether the driving shape is on the outside or inside of the head, Some on the diameter, and some on whether the screw cuts it's own thread or not. (but there are also self tapping machine screws) As long as they don't have any trouble communicating what they are talking about with the people they are talking to, I don't care what system they use. However I think it IS important to understand a few things: First, that there is an actual technical distinction, and what it is. Second, that it is commonly not adhered to, and that's OK. And third, (and this one is for you) that there exist more than one common way that it is not adhered to.

[@esmeraldanadeaujasso550]

Thank you ! Currently working on a art project that has gears on it and this is very helpful information!

[@esmeraldanadeaujasso550]

I was going to go with bearings aswell but bushings seems like it would work in my application.

[@bryangallant8185]

So let's start with thank you very much for your excellent videos. I've learned a tone. As for cutting the tube I'd say put the other pipe inside it and either cut them together (not easy) or try putting the shafts in and cutting just of edge should keep the shape of the pipe from becoming warped

[@mtslyh]

I always learn something from your videos. Great presentation once again.

[@deadwoodturning8804]

Awesome video as always. About doubling the speed of the clock. The simplest answer is to turn it into a 24-hour clock. Each mark would indicate the even numbers.

[@Steve_The_Ignorant_Astronomer]

First off , LOVE your videos , you explain things great even though I dont know the difference between a planetary gear and a compound gear , I would like to find out.... Plus you have a great voice for this..... Your kids will have a bright future with the things you teach..... Keep the videos coming ....

[@jimurrata6785]

A compound gear is gears of two diameters locked to the same axis. (think big and little fused together)

[@avoirdupois1]

I saw your problem with the bushings. I've had similar problems with knifemaking fittings, and my solution was to use a central mandrel to hold the tubing and a disk or belt sander to polish the ends

[@mfsolutions]

Love your videos! Just wanted to make a comment about gears/pulleys and your comment about work always being constant. While this is true in the ideal world in reality (work + losses) is constant. Losses as you mention in your opening are things like friction between the teeth of a gear or the belt and pulley as well as the shaft and the support. If you add pulleys you will be increasing the friction losses. I ran an experiment where 4 pulleys only reduced the force required over a single pulley by a factor of 2.5 and not 4 as you might expect. Another consideration especially with belts is the losses in the bending of a belt (particularly a vee belt) around a small pulley this often causes slipping losses (and wear). Thanks for your demo ... and discussion!

[@CafeenMan]

You need a tubing cutter. It works great for a small number of pieces. I have a miniature table saw with a jeweler's blade. When I need to make a bunch of small bushings or certain length tubes, I cut them one the table saw using a sled. Works really well.

[@ggroombr]

A tip for cutting the bushing material is to cut it whilst it’s over the pin material. In your case, slide the bushing material over the aluminium rod then cut it to size. You will possibly sacrifice some aluminium rod but it allows you to clamp the material and the cut will be cleaner.

[@cowboy3072]

Just discovered your videos. Great job. I look forward to watching more of them and sharing them with my son.

[@sirgermaine]

With the belt laying loose when you drove home the parallel between gears and belt+pulleys (6:47), I pictured the belt as a giant third great going around the outside and touching both gears

[@M_Northstar]

Exactly what I thought. Although, on second thought, it's actually the SECOND gear, since it's clearly the one that goes counterclockwise when the drive gear is going clockwise.

[@pufthemajicdragon]

I love your engineering educational videos, they are amazing. I learn things even though I know a fair bit of engineering science already. That is a beautiful clock! But also, the time lapse build portion is just amazing to watch... you should do more of just that. I think some time lapse build videos would be easier to make (without the narration and explanation and fewer cuts), I think, and give you more content and exposure for your channel.

[@pufthemajicdragon]

lol a screw secures to the material itself while a bolt secures to a nut on the other side of the material ;)

[@GordieGii]

@@pufthemajicdragon You turn the screw to tighten it, even if it is into a captive nut. You turn the nut to tighten a bolt, whether it is a carriage bolt or a hex bolt with the head captive in the material or just held still with a wrench.

[@KurtSchwind]

Your skills are so next level but I still learn things to apply to my novice level projects.

[@JessWLStuart]

This is my first time watching one of your videos! Your delivery and easy going style are very enjoyable to follow. You show your points expertly and elegantly. Totally Subscribed and set the reminder bell on. I look forward to binging your past videos and watching your future videos! Oh, and... A screw secures itself by friction with the path it makes in the medium it's screwed into. A bolt is secured by friction with the nut. Next step: make the clock self adjusting to the government time website!

[@mach1553]

10:11 Use a bushing, any dissimilar material with grease will usually do.

[@kennethstaszak9990]

Now all you have to do is re-engineer the clock to have a sweep seconds hand! Also, in clock and watchmaking setting the gear engagement is called depthing.

[@joshbrucksch]

Thank you so much, this was a wonderful video, looking forward to the next one! 😁

[@BadgerRobot]

You mags complex ideas understandable, nice work. Also the clock is cool as heck!

[@bumstudios8817]

Thank you my brain was stuck I just didn’t fully get why you couldn’t use the mechanical advantage to get more out, because I didn’t fully understand the trade off!! Now I got it! Thanks

[@VagabondTE]

Beautiful project.. The only design critique have is that the hour hand doesn't really seem to stand out very well, and actually looks like it might also be obscured a lot of the time. A splash of color might help that though. Rather than redesigning the hand shapes.

[@Jeremy_Fielding]

I kept having the same thought. I was thinking I need to get a piece of oak and stain it so its really dark. We shall see. It is easy to replace once I make up my mind :)

[@jimurrata6785]

​@@Jeremy_Fielding You could always toast it to make it darker (Maillard reaction) right up to carbon black if you like (and it doesn't loose too much strength. But strength shouldn't be an issue if it isn't part of the gear train.

[@meserettesfaye116]

waw you nailed the engineering bro, I wish have had your talent and dedication, your family is also beautiful may God bless your kids !!! your lover from Ethiopia 😍

[@pixelpaggos]

I like how he changes from engineer to surfer when ever he says tube. also fantastic video.

[@akakscase]

If you do the six hour increment you can always add a third hand that has 4 denotations that essentially allow you to at a glance tell if you are in the 0-5 range, the 6-11 range, the 12-17 range and the 18-23 range. So 3:15 am would show up as 3:15 on the two main hands and be in the first quadrant of the third hand while 8:24 pm would read 2:24 with the third hand in the 4th quadrant.

[@rovertgurn]

Screws are threaded up to the head and bolts have a length of plain shank to the head and then thread. Great Video btw.

[@numberpie]

difference between a screw and a bolt is, screw is designed to be driven into a medium or across two mediums to create tension within, while a bolt is designed to be paired with a nut and washer to compress two mediums between the head of the bolt and the washer (or nut if no washer is used), via a pre drilled hole in the mediums. both have similar uses however the way they are put to use is how they are different. the easiest way to determine if something is a screw or a bolt is typically by looking at the hole its is going into, if the hole has threads then its most likely a screw. (also take this with a grain of salt, I was not there when the books were written.)