BOLTR: Gearboxes. Worm and Wheel Speed Reducer.

This brilliant invention has been around since Archimedes. It remains a valuable mechanism for mechanical power transmission. We have a look at a workhorse of industry for the past two centuries, the Radicon speed reducer. I'll also have a stab at explaining multi start threads and why they are simply brilliant! ✪► www.etsy.com/ca/listing/464202928/one-rule-to-ruler-them-all-cheeky-jokes ◄✪
✪► / ave ◄✪

[@herbhartman7528]

I was told by a very wise man, don't use foul/dirty words, it just makes you seem unintelligent!

[@arduinoversusevil2025]

Very astute of you Herb! In order to seem intelligent we must always believe what we are told, do as we are told.

[@isj-3227]

It must get so tiring to hear that crap every video... OH NO THE WORDS ARE SO PAINFUL

[@BloodyRainRang]

When the wheel kept rolling back onto the paper I really expected some insults to be thrown at it and I would have enjoyed it greatly, but I guess the only insults that occur are directed at the camera focus for obvious reasons :3 Edit: slight cussing at things that don't wanna play along is like salt for a good meal: a pinch of it is (almost) never bad.

[@PontiacPOWA]

well shit, i guess i'm fucked

[@ahsmeg4069]

A very wise man told me that you'll live longer if you lighten the fuck up.

[@MoparMatt426]

I would love to see you narrate an episode of How it's Made.

[@Pineapple-Lord]

70% jargon 10% sexual innuendos and 20% absolutely loving the enthusiasm. Earned my subscription!

[@arduinoversusevil2025]

Sup Squad? Happy Saturday!

[@matelotjim9035]

Happy Saturday to you too, hope your's is going to be as nice as mine (Steam trains with my Daughter :-) )

[@alexander70356]

Sunday for me... I live in the future

[@kumaclimber]

AvE happy Saturday brother

[@eljonnymac]

Happy sabbath

[@arduinoversusevil2025]

Oh shit I forgot to disable the oven. I'm going straight to hell. Or whatever it is...

[@donjohnson5424]

I work in the health industry. I have no idea what any of this stuff does or how they work. Yet, for some reason, I just can't get enough of AVE'S videos. They're just too damn skookum!

[@dandan9833]

AvE, thanks for another great vid, I work for a company who sells and services "industrial leggo" Service factor; is dependent on your input power and speed, usually you will match up the speed and shaft size and work backwards on what the customer needs then calculate the service factor afterwards (they can advertise service factors if you buy a motor at the same time but this is rare) Anti run back/overdriving Worm boxes can be overdriven/back driven. this will depend on the ratio of the box, often you will see this in low ratio units like 5.5:1, 7:1 on the larger worm boxes even a 40:1 can be back-driven. feel free to tell me to F**k my hat but just thought people may want to know, also, just some free info, that box you have is a clone from the manufacturer called Motovario, another company based in the pasta benders land known as Italy. thanks again for all your vid's muck appriciated

[@pileggitech]

I love the level of detail you you present for simple mechanics. The part where you twisted the three wires onto the metal shaft was very helpful.

[@gremlicious]

"tweak it off to one side just enough to squeak it in there when she's not looking" I gain a new expression to use in my daily life with every video you make. Bless your Canuckistanian soul.

[@smsauce]

If anyone gets confused regarding multiple start threads, just take a look at the cap on a plastic soda bottle. Just drink beers and stare at it until it clicks. Your world will never be the same! Edit - Of course I look at the one on my better 3/4's desk and it's single thread.... Might have to shop a-round or buy some silver bullets.

[@arduinoversusevil2025]

Hahhaha. I recall decades ago somebody said "just look at a bottle". Uhhhh, that's single start. Man, Mechanical Wive's Tales stick around forever. Gotta go, I left my car battery laying on the concrete.

[@hotel-california]

Just so happens I have a three-start plastic water bottle here next to me. What does this mean? o_O

[@totherarf]

A 3 phase water bottle?

[@arduinoversusevil2025]

Uhhhhhhhhh....

[@hotel-california]

hey I work with confusers- not a mechanical type

[@regulatorjohnson.]

This is such a great channel I swear.

[@arduinoversusevil2025]

Gonna make us wait for that swear, eh.

[@regulatorjohnson.]

Hey AvE, I love this channel and have drawn a ton of inspiration from it, especially the BOLTR series. I am a model maker by trade but seeing the design of tools in your tear downs has convinced me to pursue an idea i have had for a while for an invention. I am now at the point where I am shopping around for manufacturing services. I am looking for injection molding, machined parts/die cast parts, as well as possibly assembly. I have designed all of my parts to be made in a 2 part mold, and want to start with about 1000 units. As someone who has recently gotten into limited small scale manufacturing (for example the rulers) do you have any advice for seeking manufacturing services either domestically or internationally? As far as swearing, how about a joke? How do you know if your roommate is gay? because his dick tastes like shit.

[@Godshole]

Ahh FUCKIT!

[@ryancl03]

every once in a while there is a video that brings the average up.

[@edwardtupper6374]

Down here we all swear

[@shellisturbo]

Would love to see a video explaining the components on a board, I work on boilers and am fascinated in what each and every component does! Your video's feed the inner geek! Thanks for taking the time to make them :)

[@TheMcal9909]

I learnt how these worked as a child playing with Lego Technics. Happy days..

[@spikeydapikey1483]

Truly happy times :)

[@ratman5727]

Those were some awesome kits, -weren't they? I had several as a kid, I sure wish I still had them.

[@TheMcal9909]

Sure were awsome, i learnt so much from them kits. I remember a big red car that had 4 wheel drive, working diffs, wishbone suspension and a gear box. Even basic pneumatic and hydraulics with the JCB digger kit.

[@KPearce57]

I learned this on an Erector set, spent many hours playing with it, but this was before video games.

[@twentyrothmans7308]

Redtube is my erector set now. And AvE.

[@MrBaldypete1]

When you said three phase, I'd already thought the same thing.... nicely explained man!

[@harrybalzack4451]

Worms are slow enough, why reduce their speed any farther....

[@arduinoversusevil2025]

gph.to/2nWxbW1

[@harrybalzack4451]

AvE And that's why I am a mechanic, and not a comedian. Got a good laugh from your gif.

[@gremlicious]

slow the worm down, even less speed but more grunt. Forget soil, this will allow that worm to tunnel it's way through solid bedrock. Superworm.

[@harrybalzack4451]

loafbloke So happy worms are not drill bit shaped, sounds like the next sharknado.

[@gremlicious]

I, for one, welcome our new Haplotaxidan overlords

[@jd52wtf]

This is a great episode. Excellent description of the topic. I work in the robotics industry and we utilize a spindle with a follower gear that is a 6 start thread. Fantastic for speed and very fine positioning.

[@coreyballard8359]

Is that the pencil from the "recharging a smell phone w/ a car battery" vid?

[@arduinoversusevil2025]

Very likely, yes.

[@oliverrapp93]

heheh i just asked that too

[@coreyballard8359]

good to see it's still kickin about in the ole empire of dirt, a true testament to how much shit doesn't get thrown out, guess it writes good enough for the girls you go out with though

[@jareddoderer7325]

So is a pencil.

[@rh4009]

AvE keeps around old chewed out pencils, but throws out skukem worm gears, on the count of them being only $80 or so. Go figure.

[@juddteckenbrock4395]

I've been in industrial maintenance for 19 years and I watch your videos all the time. This one has to be my favorite. Thanks!

[@GGL171]

"Now this is what they call a book" What can I say, you teach us something new in every vidjeo !

[@slateslavens]

I wanna know that the expected battery life on that 'book' doohickey is..

[@lyndencroker8844]

Hi, I served my time in a quarry in southowram, Halifax, west Yorkshire, David brown had a factory the next town over, (Huddersfield). Long story short, we used those DB radicon gear reduction boxes to turn a lot of really long three foot wide conveyors carrying the crushed sandstone to various parts of the plant, the things lasted for flaming years and all we did was check and change the oil in them and clean the breather plugs once a year, mostly we used good old EP 90 or 80 oil, ( stunk like cat piss) good old days 1980/84. Summer 10inch of dust, winter 10 inch of mud. 😊

[@hoobietoobie]

"Essentially service factor is shorthand for skookumness" I love it

[@devjock]

Tony builds a rotary weld table, AvE takes the parts apart, and the universe is in perfect balance. Thanks for sharing dude, awesome explanation, and definitely a Eureka on that thread phasing analogy. That clicked instantly for me!

[@larsonfam3861]

I love when the shaft on my worm drive gets throated, especially when she's hourglass! ;)

[@Andy-jj6yg]

Most informative hand model channel on KZbin, in my opinion. Thanks for what you do!

[@sstorholm]

You can also find the same mechanism (in a linear fashion) in another favourite of this channel, the left-handed Swedish nut lathe. Both also happens to be Swedish inventions (ABA clamps).

[@GunFunZS]

Those ABAco ones are the best! Worth the cash if you don't want to be standing on your head upside down in a bilge full of seawater and hydraulic oil trying to figure out which hose coated the universe in an oily mist.

[@sstorholm]

Yeah, they are really nice (but they didn't invent the worm gear clamp after some more research). Do look at the Mini ABA clamps, personally I prefer them since they don't dig into the hose as worm gear clamps!

[@en4rab]

Mikalor make some very nice hose clamps too (the high pressure ones) and if you must insist on using the jubilee clip style ones they thoughtfully offer a plastic cover you can buy so the end of the clip doesnt shred your fingers :P www.mikalor.com/eng/hose-clamps-eng

[@Dr_Xyzt]

If you get a "worm" with a lot of starts on it, you'll be able to drive it backwards. Generally, you need at least a 30 degree angle on the "threads" for it to be anywhere near capable of going backwards. Same principle as putting helical gears 90 degrees to each other. I designed a gearbox case for the mini baja team when I was in college. The input shaft had a 60 degree helix on it because the shafts didn't have any support, so the helix was aimed to make the shaft bend straight again, so the mesh didn't get fucked up. It was kind of a shitstorm anyway because the helix put a big thrust load on the bearings so they ran warm. We really needed to re-make that thing with straight cut gears and an extra shaft so the meshes are all small enough.

[@John_Ridley]

"output can't turn the input" - That's what I thought too - but we built a climber for our FRC robot this year with a worm gear drive, didn't bother putting in a ratchet because "you can't backdrive a worm gear" - guess what, it totally backdrove the worm drive. Soon as power was off, it came right back down again.

[@arduinoversusevil2025]

Low ratio gear boxes on the way! What was the ration on yours?

[@John_Ridley]

Not really sure. It was a motor used to open the sliding doors on a minivan. It looked like it COULD be like 80:1 but it could be multiple start, I didn't look at it that carefully. It was a 12V DC motor so probably 3000 RPM input or so, and we got about 75 RPM output. I don't have one in the shop now to take apart and test and it's an old motor recycled in 2008 so I can't find any reduction values online, just torque values. After getting well pissed off at it doing that, we rebuilt the climber with a triple reduction planetary with a 45:1 reduction, and that solved the back-driving problem for good.

[@coalbuster]

To be self locking, the friction angle has to be greater than the worm lead angle, typically 5 degrees.

[@JerseyJimFish]

Your passion for this subject is so absolutely contagious and inspiring I have been binge watching during my down time. I have no applicable need to understand or comprehend as I am a fisherman and fishmonger; however I find your channel, subject, and dialect very entertaining. I am learning something new which I never had the previously desire to understand . Thank you sir!

[@TheMatej125]

you can also find this on a guitar on the tuners

[@MultiMikim]

Today I learned why I love AvE. PASSION. He gets excited by these little things that make everything possible. No one would give this stuff a second glance but AvE looks at it, knows everything runs on it, and demands to know how and why it works and gets excited about it. I love AvE because he just loves to know what makes the world tick. And also Canadianisms.

[@electronicsNmore]

I like that gearbox.

[@aarrodri]

the gear explanation at the end was mind blowing! thanks for it and for all your videos. amazing stuff.

[@74_Green]

Your diagram had 3 throated designs...you forgot the 4th...Deep throated used for maximum torque and fastest output ;)

[@John_Ridley]

It's great to hear someone else who stands in awe of the fact that "someone thought of this." I'm thinking that constantly as I'm looking at old machines in museums, learning about how tapered wheels keep railroads going straight, etc. There was a hell of a lot of centuries of genius that came before us and it's worth it to think about that.

[@AdammP]

how many rippums on the input unt how many torques on the output can said unit handle in total? before it shits the bed. i may just have a use for this thing. whats the part number mi old chutney ?

[@ir0nm8n]

Virulent I was wondering that too!

[@psychowim]

I checked on ebay, nema 23 looks like it, not sure. but Chinesium pics can be deceiving.

[@Aussie50]

I've spent a lot of time working with these on swimming pool cover systems (domestic and commercial) and the only gripe I have about the really high ratio boxes is how fragile they are, seen more than a few 100-1's turn the wheel into brass paste just rolling pool covers up on domestic installs :(. ended up having to use a pair of lower ratio boxes together to mitigate the problem.

[@Aussie50]

and these were double throghted SITI Italian made boxes, not chinzie crap.

[@evanortiz7464]

That's not a pencil. It's a resistor! how has that not broken yet?

[@ir0nm8n]

Evan Ortiz I remember that video too🤓

[@PeregrineBF]

Everything is a resistor if you get the right voltage.

[@davidschwartz5127]

Same as a conductor, everything will conduct with a high enough voltage

[@RedEyedJack]

Another place to find a worm gear like that is a typical garage door opener of the Chamberlain, liftmaster, craftsman sort

fine threads can withstand more torque cause they have more meat on the minor diameter, but aren´t they easier to strip since there´s less meat in the thread itself?

[@occamssawzall3486]

Michal Kubrický: DIY Yes. But that's because fine pitch threads have a greater mechanical advantage over coarse pitch. So the same input torque (say 10 lbs) results in a greater output force on the screw end with the fine pitch vs the coarse.

[@bridged13b]

Fine threads don't strip easier, the thread with less surface area engaged will strip easier. It depends on the pitch and how much threads engaged

[@Johnnybytheway]

Good video. Please note; with a good lubricant and a lower ratio, you can drive the worm from the worm gear (wheel). There is little available torque and can be prevented from turning with a little friction (seals, etc) on the worm.

[@BarrettMcGowin]

You been doing some electrical stuff before this? Tapping up your finger cuff?

[@arduinoversusevil2025]

Concurrently doing the new Dewalt battery capacity testing. Efficiency amirite.

[@BarrettMcGowin]

AvE Just so long as you don't try discharging a worm

[@marhar2]

multi-start threads... it's amazing how many things around us we don't even know that we don't know about. great explanation, using the wires is really smart!

[@DigitalKudzu]

The Worm & Wheel? I think I had a pint there.

[@nakamakai5553]

AvE - you are making me understand things that I did not know I did not understand - - in the tradition of the very best chemistry, physics, and maths profs I ever had. Very fine video, keep it up. Thanks.

[@davidstekelenburg4198]

hey ave any idea when the new batch of rulers are shipped?

[@arduinoversusevil2025]

4-6 weeks from your order date. It's in the listing. And the shipping. And your order confirmation. And the vid.

[@davidstekelenburg4198]

AvE I'm lazy, don't judge

[@arduinoversusevil2025]

Oh, I'm sorry. I misjudged. I thought you were just stupid. We coo fam.

[@MegaDysart]

Brian Hogan I got Rick rolled last week too, on a Ghost BC video of all things

[@DougHanchard]

We've used these "transmissions" / motors in aviation since World War II. In the mid 1950's, they were designed with oil cooling ports which pumped oil to dedicated oil radiators. Many of the airliners of the 1960's used similar worm gear motors to extend and retract the main flaps which required immense torque driven at slow speed. Most landing gear retract motors were the same. They were powered using hydraulic pumps or electric motors. I'm not sure what design is used today on next gen airliners like the A380 and B-777-8/9 series, but I'm pretty sure they use something similar. Several GM electric window motors and windshield wiper motors used this setup in the early 1970's.

[@GermanToolReviews]

How do you like those Felo drivers?

[@arduinoversusevil2025]

Beauty. If I could get torx and micro... Maybe you know a guy who knows a guy?

[@matelotjim9035]

Is it me or are they made from some advanced carbon / cellulose foam with steel inserts?

[@GermanToolReviews]

Unfortunately, if you want a dead tree carcass handle you can only get Philips and Slotted for Felo drivers. They do offer a Torx with the same handle shape but it is made out of polypropylene. If you are interested PM me your address and I can send you some Torx drivers next time I order some things from KC Tool.

[@GermanToolReviews]

The handles are dead tree carcass (aka wood), with a leather striking cap.

[@matelotjim9035]

The do look nice, I'm more a Wera kinda guy though. I like the flats at the top of the shaft for getting an adjustable on for a bit more torque...

[@vc1343]

Nice demonstration Professor.Your wire wrap visual aide was well done and made me think of the lands / grooves vs. Pitch of a rifle barrel ... And/or like the difference between a 2, 3, or more bladed propeller. Ultimately, Acme thread.Good presentation. Thank you.

[@danwolf307]

"This is what's called a book" lmao!

[@AmateurRedneckWorkshop]

That is the first time I have seen an affordable gear reduction. Good find.

[@GunFunZS]

A lot of the high torque stepper motors I looked at had them built in.

[@sghuisman]

Judging from your pencil you seem to have a beaver in your house...

[@tobiasniedoba2350]

this pencil is also a proffesional multi value resistor. :D

[@edh.5561]

This is the most common set up for traction elevators all over the world. Usually a 50:1 or 100:1 worm and gear attached to an induction motor dives the traction sheave to pull the cables. They are used to help convert power and help prevent runaway cars/counterweights and drifting from landings. They also don't use a brake to stop, only to hold still at a landing.

[@daimenworrall]

Gear clamp? We call that a jubilee clip here in Manchester, UK.

[@occamssawzall3486]

Daimen Worrall Called hose clamps here.

[@totherarf]

Jubilee clip here ..... in Salford ;O)

[@TheRocknRolla84]

I call em "That fucking clamp just sliced the shit out of me!!! FUCK!!" Don't matter where I'm at.

[@spikeydapikey1483]

The original Jubilee Clip was invented by Commander Lumley Robinson of the British Royal Navy, who was granted the first patent for the device by the London Patent Office in 1921

[@occamssawzall3486]

Jubilee clip sounds so ridiculous though 😆 The British shouldn't be allowed to name things 😝

[@milldawgj9598]

Never seen one taken apart in all my years. On purpose anyways. The way I have always viewed them is usually in pieces on the floor and hanging off a shaft. Remember going over it in high school shop class. Your assessment of an industrial lego is spot on.

[@scottharter1161]

Quick - someone ask Abom how to double-taper thread that hourglass worm gear...

[@arduinoversusevil2025]

Looks like a special hob. So machining the part is no big deal, but machining the hobbing cutter is VOODOO.

[@arduinoversusevil2025]

Wait, not that bad once you know how. Start with tool steel threaded shaft, make longitudinal cuts and then grind down the middle of the shaft to make a belly.

[@stoparret]

I imagine you could manually machine a double-throated worm using a tracer on the cross-feed, yeah?

[@stoparret]

I'm not sure that would give a thread form that follows the arc that defines the root along the worm. Sans a CNC (how's that for some euphony?!), cutting the double-throated thread with a tracer attachment would be essentially the same as doing a tapered thread with a tapering attachment. Perhaps you could urge Keith Fenner to do a demonstration? He has a tracer, yeah?

[@stoparret]

Ha, you joke about that, but I've read that there are worms out there that were cut with cold chisels. It probably could be done!

[@ultimate1576]

The double enveloping worm gear set is excellent, when machined with tight tolerances, for eliminating back lash. Zero backlash is critical in applications with servo drive inputs. We use them almost exclusively on our servo drive thread rolling machines.

[@NickMoore]

Late to the game but.. heh double lip seal.

[@JesseCohen]

My previous day job was fixin up sewing machines of many makes and varieties. Many of the older machines from Singer, Bernina, Pfaff, and Viking used worm and wheel assemblies to drive the pattern cam stacks, with little followers arranged at the OD to transmit little adjustments to the needle bar at speed. Originally these arrangements were simpler, with single pattern discs attaching to the exterior somehow. Eventually, some brainiacs in design figured out you could stack discs in a permanent column and insert them in some available space in the body of the machine, usually vertically inclined. Then the stitch dial out front would move the follower up or down the stack to select the stitch you wanted, and driving the machine forward would transmit movement from the upper shaft to a worm matched to a cog at the base of said stack, turning it against the follower. Peaks and valleys in any given cam, and any steps in between, represented left and right on the needle position. It was fascinating to be honest. Then stepper motors and logic boards came along to handle it all, and are far more varied and versatile, but to this day there are a select few entry level machines that use the old principle still. I totally get the attraction of classic mechanical doodads, and knowing how they work.

[@evanortiz7464]

Service factor?!? I Hardly know 'er!

[@pauljs75]

The locked train aspect also makes it very useful for holding an angle without it weeble-wobbling out of place. So one common use is the seat-back adjuster in a car. At least if you have the kind where you have to turn a knob a whole bunch to get the angle just right.

[@shaung638]

Is it spring in the winter wonderland of canada?

[@SK_Wizzard]

Shaun G hell yeah it is... at least where i live... snows almost all melted... and we can BBQ.

[@maxhaines9063]

Shaun G Us real cunnukistanians BBQ in the blizzardous winter too...

[@animefreak5757]

snowed yesterday where I live..it's not stickin to the roads anymore, but still.

[@theslimeylimey]

If you identify grey sky and constant rain as spring then yes.

[@zyphit]

psh, I BBQ all year round in this corner of Canuckistan, and I'm just down the road from AvE. Just keep the bbq out of the snow and you're good to go.

[@Ophy-y1i]

Man. You make stuff so... easy to get sometimes. For the longest time gears have been voodoo to me, and you just explained torque multiplication in 8 seconds. Thanks dude, you are, as always skookum as frig.

[@hardwareful]

3:30 Talks about just tossing these out, 6:57 complains bearings are not put in with intent for servicing. Jeez :P

[@arduinoversusevil2025]

No. I said the bearing was assembled incorrectly and then I explained why. Jeez indeed.

[@hardwareful]

No seriously, "wrong" is merely a matter of professional courtesy unless it's enforced by a standard and not a single f*ck is given on account of not paying the people that assemble the units enough to care (of course it's wrong, I know, but on another level). I'd be amused though to see dents in the raceways from giving 'em a whack during assembly ;-)

[@deezelfairy]

hboy007 Just because it's throw away don't mean you can't do the job right to start with! It isn't economical to repair them I agree BUT if that bearing goes, you get called in, that customer needs this thing running NOW and there's no gearbox available, your gonna be replacing that bearing! A small little detail like this can save you 1/2 an hour of stripping before you find out if the local bearing place has the bearing or not. When your in a jam and the customer is breathing down your neck, little details like this can really make the difference.

[@crustybaker2633]

Well, finally a video that has a purpose. Nice job explaining and showing. Reminded me of school "show and tell" which I loved. Good job AvE.

[@harkness27]

good video I am in the process of rebuilding an alimak passage hoist very nice set up on the gear box crowned and hour glass drive 14-1 after 15 years off use its got a full bearing and pinon change thanks for the video I have learned to night I will be looking at the job on Monday in a new light

[@MichaelSteeves]

I learned about worm gears when I inherited my father's meccano set from the 1940's. Somehow we built a differential out of it as well. LEGO is great but it never had the same level of flexibility for transmission building as meccano.

[@bushmanPMRR]

I'm not an engineer in ANY description yet I understood all of this. Testament to how mighty AvE explains concepts.

[@austizle414]

folks in industrial settings will see this setup on most rolling steel garage doors as well (some smaller guys are belt driven). gear head operators are motor driven gear boxes with some bells and whistles attached. the brake on these is located on the driven end to keep from destroying the driven gear.

[@Keith.Turner]

Inspired by this. For years I have meant to find a worm and gearbox I can convert/re-purpose to spit roast chicken over an open fire in the yard. Thanks for the education and for reawakening an old project.

[@OtusAsio]

Even if I studied that in school, you had a very intersting way to explain it. Easy and logic... for everyone.

[@flurng]

Another very common example of the worm-and-wheel mechanism is the musical instrument tuner (also known as the machine head), which is employed precisely for the "self-braking" property that you mentioned, such that the tension on a given string cannot turn the tuner post, thus de-tuning the string.

[@Milsparro]

Worm boxes 60:1 and up are self-locking only if already stationary. If they are already spinning they'll backdrive if there's torque (like the thing you're winching with the output). How hard and when they'll backdrive is a function of the tooth design, mostly angle and pitch.

[@fbw47]

We've always called them "double threads" or "triple threads", etc. Other than lids for containers, the most common use would be control valves for hydrant systems, etc. needing a fast acting thread. Can't say I've ever seen a gear reducer with a double threaded worm gear. But, then again, I haven't looked. If you wanted a super high torque, low ratio it would be an option. Interesting subject and a lot of fun to turn on a lathe!

[@schwingspule]

I never thought that watching a man on the internet shoving wires on his shaft could be such an educational pleasure. Brilliant demonstration! Keep up the good work .

[@VincentOak]

I've used the same type of gear setup with Lego back when I was a kid. Nice unexpected splash of nostalgia :D

[@funkypotamus]

Beautiful. Keep those Boltr vids coming. They are great. That was a great explanation of single, double, triple start threads.

[@Broadpaw_Fox]

Vijayo's like this are why I love this channel - the way you end up br4eaking things down just seems so relateable. I knew where you were going with the multiple starts, but the way you chose to convey the idea blew my mind - so easy to understand. Hat's off - you really are the master of breaking down complex ideas in bite size bits of wonder. Dammit - now I'm thinking about brownies for some reason...small bite size bits of chocolate wonder, most likely. ;)

[@alistairs8495]

I first learned about multi start threads watching Tubalcain's disection of the bicycle coaster brake. In that case, the multiple threads allow the clutch to rapidly switch between power and brake mode.

[@boshiftlet6396]

A guitar tuner is my fav worm and wheel.Can't live without it!

[@Underpantsniper]

"Service factor is short hand for skookumness" Words of wisdom from the great AVE

[@Na16Patman]

I got to apply your philosophies at work today. Speaker died and repair costs would be too high so they let me open her up. 50 cent wire connector decommissioned our $600 speaker for a month!

[@mattstoker4975]

It's great when you have got a guy like AvE to explain things with a sense of humour. I take away alot of stuff from his videos. Education needs humour!

[@desmo750f1]

Good stuff. Sunbeam S7 and S8 motorcycles had a worm gear final drive. I used to wonder what happened on engine braking because of the typical one way effect of work gears. This video got me looking for info about the drive and I found a picture of the worm. It has multiple starts and a very long pitch, each thread only making about one turn, so I suppose that's enough to let the wheel turn the shaft.

[@kylelaw7210]

In engineering class the professor called them single, double, and triple threads. He said they were in cameras to allow for faster focusing. I still didn't understand what they were until I was putting a new end on an extension cord. The screw that holds the female end together is a double thread.

[@Hilmi12]

Don't know if you read comments on such old videos but I think a great follow up for this video would be a review of a Losmandy telescope mount, a worm and ring gear type set-up. They have been referred to as mechanical works of art designed to track stars at arcsecond levels of accuracy.. I think a review would be very interesting. I'd love to see what you think of the design

[@marleypeter]

I have little to no idea about mechanics, but i am curious, and i love watching this channel to get my fix. Worm gears? yes yes... tell me more

[@Krikstar123]

Love these more informative/explanatory vidjeos of yours! Just the right amount of AvE'rish and wisdom, to feel both entertained and wiser at the same time :-)

[@GauravA42]

Better explanation here than in my mechanical enginerding lectures, nice work prof AVE.

[@imperial3157]

I believe this may be the best "AvE explains" video. Excellent demonstration of single and multiple starts

[@aepceo1]

Always nice to have a random bit of mechanical engineering thrown in for good measure.

[@jacobanderson2536]

I'm applying to TCC, what college classes and degree should I aim for to get what you have? Btw, I'm an outboard Race engine repair sole proprietor, and now outside machinist at Lyons shipyard. You are a king of mechanics.

[@eddiespencer1]

I used to use a worm-drive dry-cut saw a lot when I was a mason tender 20 years ago, mostly for drowning out the masons when they were whining about their mud being too wet or dry.

[@alabama7636]

It looks simple at first but I didn’t know worm gear drives could be so complex thank you for the explanation.

[@blackoak4978]

I like these for cranks over ratchets specifically for that self stop. No worry about the thing running away and taking ur fingers off or cracking a knuckle if u let off the handle a little bit. Though u sacrifice speed for it

[@SeraphimKnight]

I've solved the stranger dilemma by doing it with both hands on the regular. It's a safeguard against losing an arm. Nothing beats already having high skill when you need it.

[@chrisp.5482]

This is exactly how the tuning machine heads on guitars work. Cool to see the science behind it. Keep on choochin'

[@DominickCascianoIII]

The comparison to three phase power in a mechanical system is a brilliant explanation

[@stevegelnett4469]

Your enthusiasm is contagious. Great video.

[@MrSidiox]

A treat especial? Every single AvE video definitely is that!

[@micjr21]

I'm addicted to your channel. so much knowledge, so little time

[@aacmckay]

Question about the bearings. Hard to tell exactly from the video, but do they have alternating steel and phosphor bronze balls in them? Or is that steel balls inside a brass/bronze carrier to space them out? If they are ball bearings of alternating materials why would that be?