Drilling a Hole the Width of a Human Hair?

[@tested]

Adam's new Dumore Drill: kzbin.info/www/bejne/fJ-pZK1qdrJ6Z9U Adam's previous tests of his Dumore Drill: kzbin.info/www/bejne/i3StqmR3jbKUd6c

[@mikeuk666]

Next watch making with this skill

[@ExercisingIngenuity]

@@mikeuk666 Would love to see Adam make a watch!

[@wobblysauce]

No outro?

[@sumsagro1299]

Hey Adam, did you ever use your swordforge?

[@DonariaRegia]

Lubricate your bits, use beeswax or anything but good lord use lubrication. Those tiny bits heat up fast. You'll cut faster and the bits will last much longer. Just push the wax up as the bit is spinning at the slowest speed. That is a jeweler's dream setup!

[@jacobzanoni]

"Thats the smallest hole i'm ever gonna drill", sounds exactly like a guy who's about to deep dive on drilling even smaller holes.

[@monad_tcp]

drill a hole the size of a 200nm transistor

[@MattNolanCustom]

@@monad_tcp can get at least an order of magnitude smaller with a FIB machine

[@Mupshot]

100%. But hopefully at that point reason prevails and you remember that lasers are a thing

[@MattNolanCustom]

@@Mupshot I've been out of that industry for a while but last I checked, FIB was still preferred for fine detail work, where laser was preferred for rapid material removal, and there were tools that combined the two for the best of both worlds. In that world though, blink and something new has come along, so you may be right!

[@tsogobauggi8721]

The smallest holes are the most fun to drill.

[@notahotshot]

"That's the smallest hole I'm ever going to drill" has the same energy as the salesman in 1987 telling me "This is more home computer than you'll ever need."

[@davidbwa]

1992 - I upgraded my friend's hard drive to a 120 MB drive. We both agreed he would never fill that up. Sometimes we laugh about that memory.

[@isatntt]

@@davidbwa what would todays equivalent of that be?

[@ZXLMaster]

I don't know what the equivalent would be, but my first computer, in 1982, had one of the larger hard drives at 20 MB. My current Android phone has 8 GB allocated to working memory and the rest of the 256 GB for apps and data. ❤

[@TheDeadPirateBob]

@@isatnttI remember ~6 years ago getting a computer with a 1 TB drive thinking there’s no way I couldn’t fit every steam game I own on there. Well even then games were getting bigger, and now when some games are upwards of 500gb I’ve had to buy an external hard drive.

[@airdrop1670]

I worked in a very small machine shop and we got a job to drill .030 holes in stainless steel tubing . Only got 3 holes out of one bit . At the time I was using MotorKote oil additive in my cars motor , it is a liquid polyester that would give me 10 % better gas milage so went home got a bottle and back to drilling , when from 3 holes to 28 holes , way better bit life span . Something for you to think about :)

[@1pcfred]

Some stainless is an absolute nightmare to machine. All of it's pretty bad but some is extra bad. Some stainless work hardens. So as you're drilling it if you don't feed it'll get really hard. With a small diameter drill you can't exactly lean on the quill. But what you do when it case hardens is you slam the bit down into the bore. Just what works.

[@dogwalker666]

Stainless Steel is a nightmare too drill, Even cobalt hole saws blunt after a few holes,

[@wobblysauce]

@@1pcfred Yep, all down the the speeds and feeds.

[@monad_tcp]

That was really a very small machine shop, lol.

[@1pcfred]

@@wobblysauce feeds and speeds are basic essentials for productivity. Those not in the know would be surprised to learn just how critical it can be too. Chip ejection, heat transfer. It's basically black magic. Look how much better this one specific speed works. Goldilocks is real!

[@samphillips4925]

I cant wait for the video where he shows us why he needs such tiny holes.

[@JohnB1163]

My guess would be for fiberoptic lighting in models

[@PlatypusVomit]

As a former 'professional fuck around' I can tell you that when you have the capability, you find the need. I used to do industrial maintenance and repair, and when everything was up to date and nothing broken I was allowed to fuck around finding new ways to improve our machines or w/e I felt was worth my time. I guess technical verbiage would be R&D, but I prefer 'professional fuck around'. But yeah...when you work in that kind of environment and get a new tool or capability, you find reasons to use that new tool/capability that are bullshit at first, but you quickly melt it into your arsenal and pretty soon you're primed to whip it out when it's the best tool/technique for something you've been doing a harder way all along or a new problem comes along that it can solve perfectly.

[@relishgargler]

That’s what I use them for. Lighting X-Wing and Armada models. Haven’t successfully drilled too many .1mm holes, but I’ve done a few. Surprisingly, my inexpensive drill press isn’t terrible for it. Drilling into soft plastic is a lot easier than a quarter though.

[@JohnB1163]

@@relishgargler I use a pin vise for drilling such small holes, sure it's more time consuming but you don't break your drill bits as often as you would with a drill press

[@chriskaprys]

maybe just needs a little more space

[@michaelo393]

I was always told by my machining instructor in college that proper setup, speed, feed, and lubricant will get you through any project in life.

[@FerretPD]

I find it hilarious that Adam is *so* focused that he forgot that he has a lovely Mechanic's Chair (covered with tools); and is instead perching on a milk crate for 90% of this video. Well-done, sir! 😆

[@Vickie-Bligh]

That is outstanding, Adam. In a way, takes me back to my working days. For 30 years I worked with wires that had a profile of 0.014" or 0.35mm and had to thread them into a catheter with a channel of the same diameter. That was a real challenge. For those wondering, those are the diameters of wires inserted into coronary arteries to unblock them. On occasion, we'd insert a 0.009" or 0.23mm diameter wire. They could be tough to see.

[@analogicparadox]

To think those are pretty close to the size of nozzle openings on commercially available 3d printers nowadays

[@SinisterMD]

This is what I need more of first thing in the morning. This sort of energy and enthusiasm. I feel like it's going to be a good day. Thanks Adam.

[@wgm-en2gx]

Kramer (with meat slicer): I've cut slices so thin, I couldn't even see them! Elaine: How'd you know you cut 'em? Kramer: Well, I guess I just assumed.

[@jarrodsutterfield3752]

It's funny I just ranted to my wife about how equating things to the width of a human hair irks me as a machinist due to the large variance in hair diameter 😂

[@-danR]

Did she question if you were splitting hairs?

[@smashyrashy]

In machining, the width of a human hair is gigantic

[@mikeuk666]

And the more eleptic the hair strand is the more it curls

[@IloveElsaofArendelle]

Why would you need such a tiny hole

[@johnmurcott1273]

​@@IloveElsaofArendellefor a tiny bolt!

[@waynesbutler7834]

Precisely ground micro drills, especially those that are made of tough, nano-grade carbide and are small enough to drill accurately through a single hair follicle, aren’t exactly a dime a dozen. Only a handful of manufacturers even offer them

[@robertbackhaus8911]

They actually are rather cheap - although whether they are still that accurate... Basically, they are used in PCB manufacture, and are re-ground many times. When they get too short for the automated machines, they are ground one more time and then sold for people like us to use in machines like this.

[@tomhorsley6566]

Over on the Cutting Edge Engineering channel, I remember one video where Kurtis was terrified he might break a 5mm tap because he never deals with holes that small :-). I guess it is all relative.

[@1pcfred]

I just snapped a 6-32 tap. I hadn't broken a tap in quite some time and this one didn't give any indication before it let go. I scrapped the whole piece and made a new one.

[@kyfho47]

Just today I drilled and tapped four 2-56 thru 3/16" 304 stainless. I was at peak pucker factor the whole time. Afterwards I finally remembered to breathe. I'd never done anything smaller than an 8-32 before. I was so stoked.

[@somedayDefect]

We were drilling .005" holes in .085" stainless tubing in our Fadal CNC for high temp, high pressure rupture testing for the steam tubing in our R&D energy storage blocks. This simulated what can happen when bad water chemistry is used in steam boilers. We were absolutely blown away that we accomplished this! Took several tries, but we did it!

[@shaunsandow2073]

What is .005” in mm / microns / micrometers ?

[@Lessinath]

@@shaunsandow2073 0.127mm

[@Warshipmodelsunderway]

First you are drilling very small holes, next you are extracting DNA from mosquitos, and we know where that leads :-)

[@johnanon6938]

I'm sure Adam would stop to think if he should. There's no way Adam would get so preoccupied with whether or not he could..... right???

[@EricMulek]

Dino DNA!

[@Korhanne]

sparing no expense.

[@gfdia35]

Life uh uh finds a way

[@DirtyRoomKnives]

I have no need to drill a hole that small. Yet I really want to be able to drill a hole that small.

[@tested]

*nods knowingly*

[@bigsmackisback2052]

Ahh I love Adams fascination, excitement and pure joy over the smallest (pun?) details, its very much my speed. A person is either into it the same way or not at all, like if you explain to another person just WHY something is so great, if they dont dig itm you see them glaze over or they light up. All of Adams new toys (tools) videos are great, i wish i had the income and space for half his workshop, but at least i can see how and what all the stuff works and cherry pick "what do i NEED to get the job done, vs what can i get away with using! :)

[@Budaniel]

The comparison shot of the 1 mm hole drilled next to the .1 mm one really drove home the difference in a very visual, easy-to-understand way, and was awesome to see.

[@tomhorsley6566]

You can make your own 3D printer nozzles now :-).

[@SergioEduP]

as someone who measures in the 0.1mm scales semi-frequently I must say that the jump from 0.1mm to 0.4 is fairly noticeable and probably much MUCH easier to drill, also you can make 3D printer nozzles much wider than that, one of my printers is rocking a 1mm nozzle, and since it is 1.75mm filament I want to try an even wider nozzle.

[@briansavage932]

Your enthusiasm is contagious.

[@brooke_8270]

Adam, thank you for being my inspiration to create. Growing up watching u on mythbusters and now making my own props and building every day and improving is because of u. So thank you for being my inspiration to create.

[@frenchcreekvalley]

Once we needed holes that were 1.2 thousandths of an inch in diameter, drilled through a piece of stainless steel that was about 5 thou thick and about 3/16" in diameter.. The method was to predrill most of the way through with a larger bit, then switch to the final size to poke the hole the rest of the way through, The application was to squirt a beam of electrons at 20,750 volts (DC) through that hole.. I mention this to point out that, usually, when you need holes that are pretty small,, that they often don't have to be very deep.

[@Deathsaber435]

Hey Adam and crew I just wanted to stop by and tell you guys that I recently got tested vr and I have to say I’m thoroughly enjoying it I love that when I’m watching it’s like I’m standing right there in the room with Adam or whoever the episode is about and watching them work

[@djtreq]

Just wanted to share my appreciation for that subtle but delightful audio match transition from the wheel caster ratcheting to the handclapping bgm during the montage. Much love for little touches like that.

[@bitsRboolean]

Can I say, I really like the cut into the 'um' at ~-3:24 and similar cuts at other places. It's such a good way to ground and humanize while also respecting the audience's time. "This is the sound he made while coming up with an idea, now we're cutting to the idea fleshed out"

[@THEVILLAIN666]

The swirling metal shavings around the .1mm bit was beautiful

[@tomhorsley6566]

World's smallest swarf!

[@flyingshutters3438]

@@tomhorsley6566DwarfSwarf

[@markday3145]

The tiny bits of brass against the blue marking fluid was just gorgeous. I was watching it spin faster closer to the bit, and slower further away, and found myself thinking it looked like a solar system. Mesmerizing!

[@DeadstreamOrganics]

Under a microscope those toe clamps look like they were handmade on a bench vise with a cordless drill and a scale, yet look like the coolest ones I’ve ever seen from a far 😮 My whole universe was shattered when I learned about the microscopic world, met and got to give my favorite physics teacher a tour of my friends cnc shop and got the nod of approval and couldn’t stop there, now working with and cultivating food with the smallest living things on the planet 😊 I’m still nowhere near where I’d like to be but never would’ve imagined how cool invisible stuff can be, and I owe it to ppl like Adam Savage and my teacher for being here, for being able to do something I love everyday. Now my machines are green and they eat sunshine and co2 and poo out air and delicious fruit, amazing. Thank you again!

[@michaeljohnston406]

some years I briefly work in A electronic Assembly lab. I was in charge of repair and maintaining several different machines. one of the machines was called the Lead attach machine . The machine had a wedge that had a hole thru the middle from top to bottom which gold wire was fed to make leads to attach the die to the ceramic case. You had to look through a stero microsope scope to see the wedge. There was a tiny hole on the back side of the wedge where the wire was fed tru. You could not see this hole and you just had to play with it until it came out. The day I mastered this was they day the company I worked for decided they did not need my services anymore!

[@craigadam]

What is impressive is how they make the drill in the first place.

[@nickloeffler6879]

We did this at work a few weeks ago! Managed on the first try to put a 4 thou hole through 5 thou thick tantalum sheet metal using an old Bridgeport and an inspection microscope. I'm mainly proud of the fact that I didn't break the bit while getting it in and out of the mill.

[@andrew8212]

We need a follow up video on how they create such small drill bits, followed by a follow up video on how they make the machines that make such small drill bits. Onwards to the rabbit hole!

[@mikeuk666]

The most amazing thing is those drill bits... like wow 🤪

[@zdude030287]

Adam I just want to say thank you for your content and sharing your adventures in experimentation and engineering. You've been an inspiration for me since the first episode of Mythbusters. Never stop being you.

[@ian666if]

Impressive! I remember many years back as an apprentice, one of my jobs was sharpening 0.030" drills used for making stainless steel spray heads. They were done in batches of a hundred and the machine had a magnifying head to view the work. I don't think I could see to do that now.

[@AquaPeet]

Hey Adam, why didn't you thread one of your hairs through the hole so we could see it come out of the other end? :D

[@Attoparsec]

I'm really surprised a Jacob's chuck can center the bit well enough, I would have thought you'd need a collet of some kind!

[@Slarty_42]

That's genuinely very impressive, well done!

[@user-TJ365]

I love how you were so excited to try your new table that you sat on an apple box because it was in the perfect place for a seat. As opposed to moving it and using your perfectly suitable stool. Well done, sounds like you need to find a project now to make good use of it.

[@shaunsandow2073]

Cool that Adam could drill the 100um hole but how did they make the 100um drill bit?

[@hanslain9729]

This boggles my mind as well.

[@-danR]

1000µm lathe 😁.

[@TheRealKrimzy]

😂

[@hanslain9729]

@@-danR but how do they build the lathe! 😁

[@shaunsandow2073]

@@hanslain9729 Really small fingers? Watching a watch repair channel the other day boggled my mind about how the perfect teeny parts could be made…maybe there’s a civilisation of Lilliputians under Lake Geneva.

[@Shadoweclipse1386]

This is really cool, but legitimate question: if you need a 10x loupe to see the hole, what processes would you ever need to drill that small for? I honestly can't figure what the use would be.

[@TWX1138]

I haven't been drilling holes anywhere close to this small, but I have drilled some pretty dang small holes using an old Dayton (Grainger store-brand) drill press that has surprisingly good bearings and surprisingly little runout. My purpose was making pinholes in camera body mount covers (where the modular lenses install), to turn DSLRs into pinhole cameras. First step was the find the center and mount the camera body cap in a vise where it's centered under the drill press, then use an end-mill that was chucked to thin-out the back side of the body cap to something no thicker than a thick sheet of paper, then lastly to swap the end-mill for the very, very small precision drill bit for making the actual pinhole. With a pinhole that small the resulting photos have surprisingly good image quality, particularly on newer cameras with good high-ISO/low-light performance. Plus it doesn't look like you even have a lens mounted so you can take candids that don't attract much attention even from other photographers.

[@RobertBradshaw-u2f]

Adam I found your drill in an old Dumore Catalog, it's a Dumore series 27 precision micro drill. It's listed in the 1957 catalog and is for sale on eBay now.

[@quiteintresting1916]

Imagine living a life where you do what you love... All due respect savage you inspire me

[@myxfit]

As a daily user of a stereo microscope, I highly recommend getting some eye guards for the eye pieces. It makes it sooooo much nicer to use. You can just lean up and rest your face on the eye guards, and it also blocks out all of the stray light, etc. I actually 3d printed some for my microscope out of some TPU.

[@DBurgur]

2:47 I watched that knee get a hair away from knocking this antique down and ruining much more than just a super fine drill bit

[@grendel1960a]

amazing, smallest I have drilled was 0.5mm but that was via a flexi shaft from a dremel, and I was drilling stainless steel sheet hand held, I sometimes didnt manage 1 hole and other times I would get 20 before I broke the bit- I used carbide pcb drills (look very much the same as the ones you were using, but I bought about 5 packs at a time.). I do have an optical measure (a microscope with a calibrated platen, commonly used to measure tiny thread pitches by counting 10 teeth and then measuring the offset from the start.) I guess one of those could be pressed into service to measure hole spacing while drilling.(I do have 3)

[@pbourd]

That’s a 100 micron drill. When I was in the blood analyzer business we had specified Ruby apertures at 50+/-1 micron diameter 40 micron thick (cupped profile) for impedance counting of diluted blood cells (Red, white, & platelets). When we visited the Swiss Jewel manufacturers, they described the process: strung together on an ~1 kilometer long tapered wire spooled at either end. As the machines spun the stacked discs it dabbed diamond dust abrasive on the wire. As the wire moved in and out, it would eventually reach the 50 micron end, upon completion. We developed an optical inspection system on a microscope with a “drawing tube” that we could superimpose our AutoCad- generated template scaled to the 50+/-1 micron image seen in the microscope. Sincerely Peter Bourdelle, Mechanical Engineer, Allentown PA 18102

[@GentlemensWatchServices]

The workshop's Watchmakers Alcove approves of this video

[@tinman5322]

Looking forward to seeing Adam tap those holes for set screws!

[@makingtolearn]

What a lovely little drill cart! I love these videos as they inspire me to make all sorts of little useful modifications for my shop. I also appreciate the really small scale work as I frequently work on very small items- the welding I do uses .005" diameter filler wire.

[@illygah]

Adam, to me, this is a surprising way of setting up the workspace for this tool, but then it suddenly reminded me of the ergonomics of throwing clay on a pottery wheel.....

[@gcewing]

Now you need to find a pair of go/no-go hairs to prove that your hole is the claimed size.

[@jtcustomknives]

As amazing as that tiny hole is. Just imagine the machine that makes those tiny drill bits

[@Frankie_Holt]

Your cabinetry skill are always improving 🎉

[@1pcfred]

Adam's shop fixture woodworking is on point.

[@Bigrignohio]

Amazing that by "hand" such small holes can be drilled. Not sure what they can be used for, but there has to be an application in here somewhere.

[@mojosbigsticks]

Amazing bit of kit - but it sounds like a dentist!

[@user-vy9bs6nn5z]

Maybe add some kind of extra gearing rig attached to the control knob so you can lift the base up to the drill bit in smaller, smoother increments, so it doesn't require as much finesse from your fingers to control how much force is exerted on the drill bit?

[@Amarthol1]

I work at a shop that manufactures PCBs, the smallest bits we have are .0058" with the largest being .2520". The thing that really amazes me is the controlled depth drilling I have done. How the machine can keep a +/- .001 tolerance in depth surprises me!

[@EliotChildress]

Only Adam and this old Tony could make a video about drilling a hole that I would be legit excited to watch the whole thing. But for two totally different reasons 😅

[@Markus0021]

Missed the opportunity to say "two HOLEY different reasons" 😇

[@TimFromWinfield]

I'm kinda amazed that drill bits that small actually work, without getting jammed up by the stuff you are drilling.

[@johnanon6938]

Smallest micro drill bit I've used (for fine scale modeling) was 80 ga. (0.0135" = 0.3429mm) although gauge sizes go down to 90 ga. However the smallest drill bits I've seen are 2 thou (0.002" = 0.0508mm) and can get those expensive little things off mcmaster-carr.

[@avoirdupois1]

A couple of nice add-ons I can think of would be a compressed air chip removal system (maybe paired with vacuum), and an eye shield (like a section of a motocycle shield) mounted near the eyepieces

[@Spedley_2142]

Not watched this purely because the question of "how do you make a drill bit the width of a human hair" is far more interesting.

[@mirandadonovan1272]

I used to use 4 mm fluted end mills in my CNC router, so many broken end mills before I got the speeds, and feeds right. Now you just need to add CNC with 0.1 mm end mills to make some really cool things out of grains of rice.

[@LostButMakingGoodTime]

I thought of something as you began. You have gone on at length about writing instruments, especially for sketching, and your beloved yellow Papermate pencils in particular. So, I have to ask if you have any equally specific desires about the paper you sketch on. I realize something smaller is required for portability because sketching goes wherever you go, and working in the shop or at home can be of any size. But beyond that….. if you would be so kind.

[@mikestone-w1q]

When you make the counterweight, design it like a pan scale: make it possible to set the exact balance, then add a few grams of lifting force. That will give you a light but consistent force pushing the drill into the material. Then all you'll have to do is bring the table down to clear chips.

[@tjmullen]

Fantastic video. I wish the video was longer with Adam’s running thoughts of building the stand.

[@jamesl1130]

Thank you for sharing this journey

[@themeandrousengineer]

I can officially say I've never drilled that small of a hole before. I used to work in a cnc shop at a university and we had an air spindle that would spin 40,000 RPM's and I think we did some holes about 0.012" on a Haas cnc mill. It was very difficult even on a cnc to not break the bits cutting plastic. I'm amazed that this manual drill press can cut so well.

[@beautifulsmall]

Nice work. The full 3D vision stereo binocular is critical for soldering tiny smd components so i imagine its the same for these manual operations.

[@alexcrouse]

That sewing magnet light from Amazon is great. I have two of them stuck to my CNC mill!

[@nancyreid8729]

As a fiber person (I work with wool a lot), I think in microns, so 100 microns = 0.1 mm. That’s 5 X the diameter of a Merino sheep fiber at 20 microns.

[@Diabolical-Divinity]

Your Glee makes me so happy. Thanks.

[@abductedcows4100]

Fantastic build. Question, where can I find those casters he’s using?

[@j.r.millstone]

I think you're going to need a lubricant that's much lower viscosity for those bits. You can see from the footage that the oil is sticking to the bit while holding globs of chips. You may need something so thin that it'll prevent that buildup and also flow into the bottom of your hole.

[@XelaSnikliw-fg8wu]

Those little wheels are choice!👌

[@SteveH701]

1/10 of a mm sounds cool, but calling it a micrometer (µm) sounds even more awesome. Great video as always Adam!

[@theoskylab]

It's amazing that thousands of viewers are eagerly watching Adam drill a very small hole and are very excited when he succeeds. I am one of those viewers myself🤣

[@collaborativeclockworks]

It was exciting watching you get excited about this!

[@AdamNunnDes]

Adam, you should try drilling a hole in the end of a graphite stick from a mechanical pencil! I remember seeing a Japanese TV show where 2 machinists competed to drill all the down the length of one.

[@N1RKW]

I'm surprised that the drill uses a Jacobs chuck instead of a collet holder. Must be a very good one!

[@SimonWad]

That is incredibly impressive and I am awed by you - at this scale, metal is a bit weird, in my experience. I have, in the past, and many times, had to perform microsurgery and used a 34 gauge needle - 0.15mm ish external diameter, 0.05mm ish internal diameter, and have also sharpened these needles on a diamond wheel. The metal of these needles is oddly squishy at such scales. Funnily enough, the needles come with "pipe cleaners". Yes, this stuff is done with a microscope. edit: a stereomicrosope. Not possible (for me) with a mono

[@roysoutdoorlife]

And to think somebody (or something) made these drill bits in the first place!

[@GodzillaGoesGaga]

PCB CNC drilling does thousands of 8 mil holes per session. Look up Excellon drill machines. I’m pretty sure they can do smaller but typically lasers are used for 4 mils and below. Aspect ratio is key.

[@rdlockrey]

wow, that's sick adam, but what would you use such a microscopic hole for?

[@JohnB1163]

Simple, Fiberoptic lighting for space ship models

[@WoefulMinion]

@@JohnB1163 Funny, that was my first thought, too!

[@Mmouse_]

I fell down the rabbit hole of how those ultra small drill bits are made... Super cool.

[@devilmastah]

Those casters under the table look amazing, what brand are they

[@starbuckqbb2287]

I also want to know

[@mccaine1]

What are those casters with the red levers? I'm looking for something just like that for a project...

[@JohnDlugosz]

When you started the build, I couldn't see what you were doing when you picked up something and started making rapid clicking sounds... I thought you might be using a Curta to do the figuring to plan out the size!

[@SarahKchannel]

I just finished building a mini CNC drill that uses the exact same micro drills - I am using it for PCB drilling, hence the CNC part. The biggest problem on CNC is the zeroing of the Z depth, since I can hardly see the drill and a contact probe still frightens me for this tiny drills...

[@GrimResistance]

I 100% have no need at all to drill holes anywhere near that small but now I have the urge to get that exact setup to try it.

[@happyatoms6535]

Those Harbor Freight micro drillbits are godsends, especially when repairing electronics with damaged traces and pads

[@1pcfred]

I'm not too keen on those tiny carbide electronics manufacturing waste bits. They're very brittle and tend to snap on me. I have tiny twist drills made out of HSS that I prefer. I even have a micro drill press too. It's not as nice as Adam's Dumore but it's still pretty schmeck.

[@rocketman221projects]

@@1pcfred Those small carbide bits can't be used by hand. If there is any runout or movement in the work piece, they will snap off. They also can't be used to drill high aspect ratio holes. Using them with any metal that likes to grab carbide will break them too. They are intended to be used in a CNC drilling machine to drill holes in PCBs. When used correctly, they last a long time. The HSS bits will only drill a few dozen holes in a PCB before they get dull. I've drilled thousands of holes in PCBs with some of my carbide bits and they are still very sharp.

[@1pcfred]

@@rocketman221projects yeah they're pretty brittle but if you can do it then you can do it. I've certainly snapped a lot of the little buggers. But I've managed to drill some holes with them too. What they're intended to do and what people end up doing with them are three different things.

[@rocketman221projects]

@@1pcfred I have broken quite a few of the smaller bits when drilling metal. I mostly use them for drilling PCBs and they rarely break when doing that.

[@andrewdonatelli6953]

Coming up on the next episode of Tested. Adam taps those holes and makes tiny machine screws for them.

[@dfgaJK]

1:35 Don't you want to go faster when you go smaller to account for the decrease in circumference and thus maintain the correct surface speed?

[@1pcfred]

Beyond that you over drive just to keep tip pressure down. Why Adam wants to go slower I've no idea. But it seems to be working for him. That is contrary to general convention though.

[@JohnB1163]

An attached work light might also be a good idea that way you will always have a light source no matter where you are using that mini drill press

[@AAOMorpheus]

That looks so amazing. Seeing the difference in size made me think, one of the things you could make is a micro Hole Gauges, measuring from 1mm down to 0.1mm, no idea what you'd use it for but why not.

[@jimyekel1396]

I've played that 'find the hole' game before. Backlighting is critical . I was tasked with measuring a .001" x .010" slit for a solar spectrometer .

[@dennisash7221]

This is amazing, drilling small holes but I have a question, what are you going to use the small holes for? I can think of making a 100mic absolute filter, that would be kind of awesome to make (need a lot of holes), but what would the application be. As I am typing this a thought came to me, can you tap a 100mic hole and even more important can you make a threaded rod or bolt to fit into the tapped hole, that would be a super project to see. "Adam's micro builds" (you can use that Adam) that would be something I would watch for hours.

[@cg_justin_5327]

I'm not sure what the practical application could be for a hole that small....but still cool as hell!!

[@josephtenbusch53]

Love the video as I do all of these, but my question is, what practical use is this? Great for demonstration purposes but why would you need it?

[@kungfutuber]

No doubt useful for watches, small scale model making and electronics

[@1pcfred]

@@kungfutuber There's no use for a hole that small with electronics. Through hole leads are much larger in diameter. 10 times larger.