Making a Worm Gear on Bolt

[@Equismaximus]

I have been a Tool & Die maker for over 50 years but I want to commend you on your skill and ability to make such a fine project with so little. Your methods at times scare me as far as safety goes and your fingers as holding things with your hands can lead to the loss of fingers and I have seen eyes put out in machine shops I have worked in but still I have never seen so much made with so little. ' We used to have a saying when I worked at Arizona State University in the Physics Machine Shop for 20 years before I retired. "We the willing, lead by the unknowing, are doing the impossible for the ungrateful. We have done so much for so long with so little that we are now qualified to anything with nothing at all"! You personify that statement! You Rock my friend and I say Kudos to you. What a beautiful job you did with rudimentary tools. Your ingenuity is to be admired. It takes a person with knowledge of such devices (worm and worm wheel) to appreciate what you have done. The unknowing will just look at it and see nothing. Truly, beauty is in the eyes of the beholder. The knowing will see beauty in every step. The unknowing will just stare like a deer in a headlight. Take care and keep up the good work. Maximus has spoken.

[@davidwillard7334]

Thank you ! MISTER MAUDESLAY !! / VAUCANSEN !!!

[@Hathorr1067]

Wow, that is the most effed up way I've ever seen a gear cut, and it worked just fine. Props.

[@jaakkopontinen]

Yeah it just happened to align :D

[@brenturk22]

@@jaakkopontinen ive been trying to figure out how he got it to align nicely too

[@jaakkopontinen]

Trial / error /luck. Or perhaps math (diameter vs pitch), but that would, of course, require veeery precise calibration and settings on the lathe.

[@higamerXD]

@@jaakkopontinen or, just dont show your fucked up bit of the gear on video that might also be the case. he made it out of brass anyways so its totally useless

[@Hathorr1067]

@@higamerXD Not really. It's common to have a bronze ring gear. One, it will protect the motor since it will strip first, and it's a stronger gear to make out of brass compared to the pinion worm gear. Bronze is actually quite strong. Plus, it will hold oil better compared to steel.

[@robertqueberg4612]

I spent fifty years in toolrooms, building stamping dies, injection molds, and lots of prototype gizmos. I am very impressed.

[@davidlewis7382]

I have done this on mills too. It is a very good method to create custom worm gear sets. You get very good engagement as well. I had to make these type of gear sets for scientific instruments. No one made the sizes and gear ratio I needed. Nice video and methods

[@AntonySimkin]

MAN! Man! MAN!!! This is genius! Using a common threading bit and a lathe... oh boy I will make so many worm reductors now lol THANK YOU!

[@TheGrtCornholi0]

Now my elevator may not go to the top floor all the time, but I have a sneaking suspicion you might have a little sarcasm in that tone of yours.

[@adityarane5735]

I doubt the strength of brass gear teeth. It wont be able to bear high torques. You will need high strength materials and also axial load bearings.

[@anelpasic5232]

@@adityarane5735 Most worm gears are made from either brass or bronze. You are underestimating the shear strength of those two materials.

[@corneilcorneil]

How do you calculate the diameter?

[@Hathorr1067]

@@adityarane5735 As Anel Pasic said, it's vary rare to find a wheel gear that isn't brass or bronze unless it's special purpose. That is your wear gear. Normally, the wheel gear is attached to another gear that leads into further gear reduction to handle even more torque if so desired.

[@pomojemu3235]

Using threading tap is a briliant idea. Thanks for the film!

[@ElChokin]

I don't understand how there can be people who don't like this work of yours, it's GREAT, very professional, greetings from Punta Umbría-Huelva.

[@Inventive101]

A special work! I've been working with machines for 15 years but I can still learn tricks from you. Today's technology no longer allows you to learn things. Wonderfully worked and clean. Good luck

[@miningcoinsbot]

I appreciate you brother give me a shout out please..I'll be waiting

[@daos3300]

'Today's technology no longer allows you to learn things.' what..?

[@Inventive101]

@@daos3300 For example in your video. At work, everything is done on cnc, we rarely do manual work

[@daos3300]

@@Inventive101 ah, you mean hand made things. fair enough but on the other hand, there is a lot to learn with cnc/software/3D printing and new materials tech. exciting times in a different way.

[@Inventive101]

@@daos3300 It's true, it's also a beautiful part of things. I'm a manual fan anyway

[@JohnCambanis]

Well done, master of machining! I would like to reply to some comments made about the accuracy of the cutting procedure. One calculates the Pitch Circle Diametre (PCD) of the threading tap to the size of gear one wants to cut also using the PCD to size the final dimension of the gear.

[@navid9852]

It is so spectacular watching how you used the tap to make gear teeth. Amazing work and so satisfying to watch.

[@rosannaspeller9408]

Yes this was the coolest part! Very inspiring

[@trappenweisseguy27]

It’s called hobbing.

[@riccardoa.ballerini7989]

how do you calculate the diameter in order to avoid a thread mismatch at the end of the work?

[@therestorationshop]

taps are a certain number of threads per inch or millimeter. As such you calculate the diameter such that the circumference is evenly divisible by the threads per inch/mm of your tap.

[@marutikantikar4324]

@@therestorationshop right

[@seditt5146]

Pie is good, very tasty, everyone loves pie.... you guys like pie? Apple pie... cherry pie... shoe fly pie... mmmmmm mmmmmm love me some PI !

[@dhanushembekar3751]

Good question and best answer too.

[@josemanon6295]

Great job! How to calculate diameter' gear, if you want a determined number of teeth? And how "pitch" first and last teeth in the first pass? Does it "automatically" match? Thanks.

[@dmitrys6201]

Качество изготовления потрясающее. Мне кажется, что подшипники на приводном червяке должны быть упорными, либо, как минимум, должны иметь крышки. Иначе высокий крутящий момент вырвет болт вместе с подшипниками. Еще, наверное, надо бы масляную ванну предусмотреть для смазки шестерен

[@Reegareth]

this looks amazing. I do wonder just how much strain those smaller threads can take on a single side like that If it can take a few thousand pounds without deforming the threads this would be an amazingly useful bit of kit to have.

[@higamerXD]

well, he did take brass so realistically this is only a desk decor piece as the brass could never take any amount of real force

[@timkooper]

Won't take much over time.

[@TechieTard]

The guy most obviously knows what he's doing. I pretty sure he understands loads in respect to the application. I believe he made it more for the need of the ratio and not the output force seeing that's what he cited in text.

[@Yamahog]

@@TechieTard Myself, I would have used aluminum bronze , it's really tough. And for the bearing bosses..... I was kinda hoping he was using a digital readout on the X and Y axis' of the mill....... The back lash on the threads seems a bit excessive..... say 20 thou instead of maybe 3 or 4 thou.... meaning I would have used a fly-cutter to get the bosses dead-center for proper back-lash clearances..... but then, that's just me being a fuss-budget, lol.

[@7alfatech860]

Very nicely done. Might be a good idea to cover the ways of the lathe when using the Dremel.

[@vikassm]

Fantastic work mate! Looks really good, works well too. Best to have a nice tight press fit for bearings, if that's not possible then make it a sliding fit and use loctite bearing retainer (638/648) for bearing/shaft seals instead of jb-weld or generic epoxy. Also use tapered roller bearings instead of ball bearings for the bolt-drive if there's going to be high axial loads.

[@rogerdeane3608]

Depends on it's use. With JB weld you don't need a circlip or retainer cap, I use it often for this purpose especially if it is low speed low load..

[@bobturnbull18]

Tapered bearing thrust side only. Other side should be a ball bearing. If they are both tapered the off side bearing clearance will increase as the heat of operation expands the housing.

[@taxicamel]

A lot of work with many steps shown ....all good. BUT .....not knowing what the "purpose" or "application" is, there are several questions. Where is the "adjustment" for wear? Someone commented about "good engagement" with worm gear sets. Actually ...quite the opposite. There MIGHT be engagement in only on how deep the thread is generated. 180° is the maximum, which is really a lot, and only ONE thread pitch is engaged. So if this is purely "reduction" your needing, and there is no significant load, this will work for a while. I couldn't help notice the chatter at 1:32. You are not going to get a very good surface finish OR accurate thread form. Just wondering why the spindle speed was so fast ....also no cutting lube? And lastly, the bolt you used clearly showed it had a very poor finish on the thread. There were several points where we could see the thread. One was at 7:05 and you can see numerous "nicks" on this thread. I suppose this "project" was to demonstrate steps of machining and fabricating. To anyone thinking this is for "high torque" applications, it is not ....not with this kind of standard thread. An acme thread would be the first choice. .

[@Gravy_Master]

It’s been a pleasure viewing your gears, young man. Thank for the performance.

[@ger_ivexrn2961]

How did all the threads line up so perfectly? Don't you have to choose the diameter very precisly?

[@user735_]

Yeah, I wonder that too. At the end of the threading process don't know how they align OK to close the loop

[@Georgehanes-GJH105775]

@@user735_ I imagine there was either a lot of trial and error or math and measurements we aren't seeing. Probably measurements judging by how good this looked.

[@quintmcm3076]

You just keep cutting deeper till they align. At a certain depth they will align then deeper they would misaligned and deeper again they would align again. When you have a full thread cut and aligned stop. Saves working out math. That my take on it

[@christianeriksson4733]

Very nice! It should be said though that not all worm gears have a locked output gear. I currently have a 15:1 gear in front of me which is actually back-driveable. Just so no one builds a dangerous machine based on the information in the video.

[@paulomelo5453]

Hi ! The idea is good but...... The tool you used to create the teeth on the crown would have to be slightly different. As there is a height difference between the tooth head and the tooth foot, the tool would have to be modified so that the coupling between the screw and the crown was more precise. It may work, but it can't be too demanding on the system.

[@nickbrutanna9973]

Very interesting. How did you know how to make the threads on the gear "intersect" at the end? I assume it was a calculation, but how does that get made? I mean, you could take it around once, and it could obviously just start a new threading overlaid on the old one, messing up the point -- the thread had to **exactly** match into itself after one (and each subsequent) revolution of the work gear blank.... even a fraction of an inch of variance would have meant a less than accurate in-fit with each successive revolution, meaning slop... How did you determine what was done/needed?

[@rickirish950]

Could be wrong but I'd think after hand turning it to pilot the threads then having the lathe spin it several hundred times most likely created the path needed based on the positioning (how true/little the tap had any play) it creates a true pattern automatically based on it being a circle, plus possibly he just did the math based on thread space/circumference of the circle idk lol :P I'm lonely what can I say.

[@CMAenergy]

Question When that wheel comes around to the original place of starting, What's to say it will line up correctly to the original threads? I think you were lucky, unless you did some serious calculations

[@poipoi300]

I'm not a machinist but I assume you could get your tap TPI, multiply it by a certain factor and that's your disc circumference

[@jameswiz]

Thank you for not just blasting music during the video.

[@allanwalker5305]

was there a calculation for the diameter of the output wheel, to make sure that the threads lined up properly around the wheel, or was it eyeballed and you just got lucky? using a cutter and dremmel doesn;t seem the most accurate, so i guess it was eyeballed.

[@АлександОзеров]

Следует подшипники винта устанавливать с внутренней стороны обоймы подшипника. И на винту делать ограничители для устранения продольного хождения винта. Потому как при большой нагрузке на винт он будет выходить с посадочных мест под подшипник, и даже с самим подшипником. И у данной конструкции нет возможности регулирования резьбового зазора. Но как наглядное пособие для изготовления ходоуменьшителя сойдёт. 😂

[@aramroshani6197]

Excellent job, after long time working I learned something completly new. Thanks

[@lukem280]

I like the vice on your drill press

[@utubefrog09]

You’re making it look way too easy, I just wish it was for everyone, awesome!

[@danalexandroaie3233]

Nice and interesting your presentation, but I have a question: when you first cut that gear using a M20 tap, how did you know the gear would have an integer number of teeth? That operation is usually made using a divider in order to get an integer number of teeth.

[@daos3300]

worked to nearest standardised diametral pitch? plenty of scope with the manual grinding (would have used a form tool myself)

[@sebwiers1]

You can make a good guess at a tooth radius that will work by doing some math. If you are off by a small bit, the setup will mostly self correct, dividing the error evenly spreading the error across all teeth. You run into the same challenge when knurling - a knurling roller has a set spacing that you want to work out to wrapping around the part an integer number of times. But nobody uses a divider to lay out knurls.

[@trappenweisseguy27]

The out diameter has to be cut to very close tolerances in order for the hobbed teeth to be perfectly in sync. There will be charts or tables available for this.

[@pauls5745]

I guess if it's brass, you could just keep running it and increase depth until clean teeth were evenly formed, but youd have to be pretty close to the target OD to start off. Im sure there's charts for # of teeth for diameter based on TPI, but it might be faster to do the math than search for that. (1 /your bolt TPI) = spline spacing, then multiply that by # of splines you want = Circumference, then (C / 3.14) will give you the OD inches. there's other ways. this will get you close

[@grumblycurmudgeon]

Outside calipers and a willingness to spend more time with a dremel in 90 second increments until you've arrived? Sneak up on it? The other responses are right about self-correcting, assuming one is close, but I'd be prepared to assert you could get it down to lathe tolerances with a dremel and a LOT of patience...

[@brenturk22]

How did you manage to get the precision right so there were an integer number of teeth around gear? Since the diameter gets smaller as you cut the ridges deeper did you just keep going until the ridges met in the middle as an integer number, or was it sized specifically/another part of the design process that ensured your brass gear had clean and a flat number of teeth?

[@kenparkerarchtoppery9440]

Damn good question, just like knurling, sometimes you get lucky. If he did calculate the number of teeth he's keeping it a secret.

[@brenturk22]

@@kenparkerarchtoppery9440 Now I'm gonna fall down the rabbit hole of knurling videos lol, thanks Ken. Hope you've been well

[@rodblomley8517]

I am so thankful to have come across this wonderful,amazing, video. Thank you very much!!!!

[@ВикторБарисов-ю5ц]

1 вопрос: зачем делать червячную передачу винт-гайка с использованием метрической резьбы вместо прямоугольной(ну или на крайняк трапецеидальной)?

[@vimp5594]

иииии подача смазки в такой узел тугой струёй. Лайк, людям с руками всегда лайк

[@seanc8061]

I made one very similar. Only issue is once you add a load on the worm gear, the steel bolt will destroy the brass gear.

[@allanramgoolam8007]

You are a”REAL” boss, thanks.

[@kennedy67951]

Well, 'I learned something new. Thanks for the upload.

[@akinnon2000]

wow... extremly professional

[@veikkoimmonen7300]

Did you calculate the diameter for the worm face, or was it just luck that the teeth happened to mesh again after the full revolution?

[@seagie382]

I wonder if it would be worth greasing this

[@charlespartak2435]

in order for the threads to meet properly at 360* how do you know what the driven gear diameter would be before cutting the worm gear teeth?

[@tbertw]

How did you determine the radius or diameter of the wheel to allow the tap to fit perfectly along the circumference?

[@gkasprow]

I have an impression that he continued until it fit :)

[@SpotOnArm]

These engineers were no-where near the vandalism center and looting, nor did they sneak across our borders. India has millions of resourceful people . Good to know the delightful combination of the hand and the head. Love this stuff. Thanks.

[@davidsmithers3353]

if you put the output on the other gear would it be 100-1?

[@fortoday04]

Very cool. Love the shop.

[@Bob_Adkins]

Great work, beautiful worm gear. When in actual use, it will need some grease.

[@stevebabiak6997]

I would suggest lithium grease for the interface between the gear and the screw.

[@humblehombre9904]

Beautiful work, brother. Well made!

[@buckybucky8596]

How did you calculate the diameter of the brass 'gear' so that the threads do not overlap each other after one full revolution of the gear?

[@dariodalcin5177]

The circonferce has to be a multiple of the thread pitch. But as you feed the effective circonferce gets smaller, so I still can't wrap my head around it I tried it myself and it worked even though I didn't calculate anything. Guess it wants to "fall" in the groove it already made unless it ends up perfectly in the middle

[@claudedulieu8942]

hi , actually j made the same systeme with an old brass wheel ( very used and some teeths brake..) I think it brake cause no lubrifiant during a moment...? But i wiil remanufactoring now .

[@EpicTyphlosionTV]

This is peak engineering

[@telelaci2]

Every step is very clever and practical, you are a great machinist. But there is a design flow. The surface of a bolt's thread is quite raw, it's not the best, the tolerance neither and its not hardened, not designed for continuous rotation and friction. A real worm gear is relatively cheap, and its, much more pedantic part for this task. It's not worth replacing it with a bolt in my opinion.

[@tcurdt]

I don't get how you managed to make sure that on a full turn the teeth are meshing at 01:40. The circumference (or radius) would need to be a perfect match.

[@juanmanuelgreco7738]

El torno la maquina más completa sin dudas!

[@vadimyedzinovich7956]

Сколько работы и материалов ушло в никуда... Всю эту накатку с колеса червяк слижет в момент при малейшей нагрузке, а поскольку кривые руки не в состоянии установить подшипники без клея, то система неразборная и неремонтопригодная, при первой же поломке только в утиль все изделие целиком.

[@TechieTard]

This makes me want a mini lathe so bad!

[@osmanpasha_diy]

Won't the bronze wear out under load quickly?

[@artstechnology7809]

Great job very professional. Respect for you genius. 👏👏👏

[@WCollinsWhiteIII]

Doesn't the diameter of the driven gear have be "Exactly" divisible by the thread pitch?

[@Totalrepairsolution]

Professionals Always Professionals keep it up 👌👌✌✌👉👉👍👍🤝

[@lyes6033]

will the lathe and threading bit trick work with steel instead of bronze

[@jeerrrrrrryyyyy]

Wow dude! I'm very impressed with your ingenuity on this project. I do have one question for you if you don't mind. Why didn't you cut the bolt support bearing housing to a .001"/.002" press fit? The epoxy works too, and i love the finished product! 10 out of 10 in my book Brother.

[@amitmondal8805]

Sir after running long time the gears will be heated due to friction.So it should reduce friction using oil.

[@venkatanarasimhamkadambari242]

Brilliant Mechanical Work 👌👌👌

[@michal_king478]

i hope I get to do something like that on a lathe at my university. Ive wanted to construct a heavy telescope mount for a long time but an essential part of those is a worm gear (since they spin at around one revolution per 23h 56m)

[@satyajitbhadraroy7723]

Yes. This will work neatly on a tracking mount.

[@TheCrazySpanishGirl]

Oooh, that's practical engineering!😀😀😀

[@АнТон-ч2ъ7д]

why epoxi tho, how do you dissasemble and maintenance this thing now?

[@DurekuDragon]

Looks cool as hell. I'm guessing you left it open because you didn't want to disassemble it for periodic cleaning and greasing?

[@catthecommentbothunter6890]

Shout out to the people including me who has no lathe🤣🤣🤣🤣

[@ВалерийСоловьев-п4ь]

Можно попробовать на токарном по дереву

[@rolledweedsOfficial]

make one very easy..take me 3 day to build one

[@danneumann3274]

nice job My friend. So many men have been seriously injured by wearing gloves on a drilll press or lathe. It happens in a fraction of a second.

[@NCPFunK]

Dont you need a polish on the bolt ? i mean it seemed pretty course ?

[@steveforbes7718]

Most everything was well done. However, there is no way to adjust the backlash of the worm gear and worm wheel. It is very obvious that there is significant slope between them. This is detrimental to many applications. Being able to adjust that backlash is crucial to many applications of this technique. Also, it would be good to be able to predetermine what the exact ratio would be and how to determine the outside diameter of the two gears. Also required is the depth of the worm wheel recess. This is fine for crude things like lifting mechanisms and such but, not for when precision is reequired. Regardless, the video itself and the overall construction was well done.

[@robrussell5911]

Looks ideal for a homemade power cross feed for the milling machine.

[@davidcarter2368]

Indeed. Edit - Speed rate change would be as easy as four bolts.

[@robrussell5911]

@@davidcarter2368 yes, good point.

[@АлександрБугай-п1г]

Я рад этому что у л мастеров есть станки. Будте здоровы Юди в вас нуждаются.

[@hydorah]

I really like the way you cut the thread on the gear very ingenious. I really did not like the use of epoxy instead of press fit or even snap rings to retain the bearings. But yeah pretty cool. Impressive welding also

[@markrainford1219]

Does the number of teeth have to divide into the circumference exactly?

[@heater101101]

Love the project for my little shop. Good job man.

[@thecorbies]

Nice work there. Did you calculate the diameter of the brass part to get the thread forms to match, or did you refer to a table of some kind? Regards Mark in the UK

[@spacecase0]

There is a lot of math involved to figure out if that's going to work or not. Then I suppose there's a bunch of people that just get lucky trying it with no math

[@thecorbies]

@@spacecase0 Haha. I know what you mean.

[@forename_surname]

This is either problematic or self- solving, and I'm not smart enough to understand which. So the threads can never be off by more than 1, this helps. Also, when the threads start cutting, they must be off in order to be correct when finished cutting, owing to the tpi getting tighter as the tap bites deeper. So, if not aligned, just keep cutting deeper until it is perfect?

[@Tinker_Nerd]

Why epoxy instead of a press fit, or grub screws?

[@sharkins8696]

Very nice but what if a bearing fails, since its epoxied in thats gonna be a pain to remove XD

[@toihin5500]

lmao why cant the channel come up with a better idea like friction fitting like wht

[@nathkrupa3463]

Great design nice thank you so much sir.

[@leebarnhart831]

Ya got a thumbs up from me my friend! 👍. Well done.

[@pawelrafael25]

nicely done...good job

[@Imwright720]

Beautiful job. You make it look so simple. I know it isn’t.

[@ВладимирНазаров-ш9ю]

Ещё в советское время в СССР самодельщики предложили нарезать червячные колеса метчиками.

[@oleg9782]

Very nice.! U know instead of jb weld like u use on ur bearings u can use medium/semi permanent or red/ permanent thread locker with thread locker u have the option to change the bearings if needed in future with a heat gun. That’s how I installed mine when I was building belt pulley ls for belt grinder and it works perfectly till this day and it’s been over a year now almost daily use.

[@Nikolaj_Teslov]

Я просто хочу сказать, что этот велосипед давно изобретён! 😌

[@90FF1]

There's more to this than meets the eye. The diameter of the brass wheel has to be just right for the threads cut there in, to also come out just right. Nice work. Beats a fidget spinner any day.

[@Qujav]

Aren't you worried about pushing out those bonded bearing by high torque applied to brass gear?

[@miladinde]

A neat and excellent Work 🤤🤤🤤😋😋😋😍😍😍🤗🤗🤗❤❤👍🌺🥇

[@palcoscenicotvweb1783]

hello please can you tell me the precise diameter of the brass wheel ? Thank you very much. I have to use this reducer in a squirrel stairlift the one with three rear wheels, do you think it's okay?

[@raymondzhao9557]

I dont understand how you make sure the alignment of the bearing mount？ @ 04:50

[@rhbvkleef]

Is there a reason you didn't use thrust bearings?

[@SuperMechanic]

Very amazing work

[@tyrellst.hilaire4653]

Me: I wonder what kind of $3000 tool he will use to make those threads. Him: hand tap Me: .....ITS SO BEAUTIFUL

[@glennlopez6772]

Thanks for the video! It would be nice to know what made you take this approach! So clearly explained!

[@howardsmith1111]

Great vid. How did you position the drive gear in the housing to obtain an accurate backlash on the worm?

[@irinagurina9255]

Did you choose the output diameter randomly or there is some math behind it, to avoid the pitch to overlap after a full rev?

[@MitchEllis-e4y]

What is the transmission going to drive?

[@peterdrury5627]

Fantastic project. Looks like you got the start and finish of the threads on the wheel to meet up perfectly. How did you do that?

[@marcelbron6128]

Circumference divided by the thread pitch must be an integer and then it works.

[@peterdrury5627]

@@marcelbron6128 Thanks!

[@Elfarot]

Тот самый случай, когда лучше не показывать как это сделано.