Broaching external gears on lathe - planetary gear

PLEASE DO NOT ASK HOW I INDEXED IT!! READ THE INFO BEFORE AND YOU WILL FIND THE LINK TO THE VIDEO!! THANK YOU
My FaceBook page:
/ astraivecorc.grassi
Hi all,
I need some planetary gears for my model ...
I had an old battery-powered drill with this type of reduction, but unfortunately too high (1: 6) and non-standard metric module (0.7), so I decided to turn my lathe to a broaching machine ... I used the gears of my lathe that give me the chance to do almost all possible divisions. Now I can produce my own planetary gears with a 1:4 ratio!
If you have patience, you will find more videos on my channel of this work ...
I leave the link anyway:
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[@thra5herxb12s]

The method is so simple, but it's the imagination thats the clever part. This is the work of a clever person and a proper engineer...

[@ChrisB257]

I too wondered about the indexing. I have used this "broaching" approach for cutting keyways quite often. Nice example of patience - been there and done that! Grinding the cutting tool musty have been more than critical. Most interesting, thanks.

[@trinifishstix]

You sir, have infinite patience. I have no idea what these gears are meant for but I enjoyed watching this video. Well done.

[@viscache1]

Cool gear! Patience and elbow grease...there MUST be a tool for that! Thanks for recording it, looks like a great project.

[@CLAUDIOGRASSIASTRArc]

thank you!

[@trollforge]

Excellent, you've made my job of obtaining change gears for my antique lathe much easier!!!

[@TerryD15]

Hi Drew, It's not milk, it is a mixture of a special soluble oil and water used for cooling and lubricating the workpiece and cutting tool. In the industry I worked in we used to call it 'slurry'. - Never be afraid to ask.

[@tomharrell1954]

You have the patients of a saint

[@OriginalAtomicSheep]

Patience.

[@rcmadman18]

Thomas D Harrell I

[@TikiToyLabs]

seriously.... who watches a video like this on KZbin then "thumbs down" it? really? Very cool.

[@billydoll72]

Nice! I wish I was that good at turning out parts on my lathe.. I got a mini lathe for Xmas and all I've figured out how to make is screws

[@JetBen555]

At my shop, we have an antique machine (made like a tank ahah) from the WW2 era that can make pretty much any gear , so it would be a total waste of time for US to use that method... but it's still fascinating to see how people come up with crazy idea to get the job done ahah XD.

[@senna7811]

Complimenti Claudio! Sembra il pignone degli automodelli TAMIYA..!

[@jittychitty]

They say the Lathe is the only machine on Earth that has the ability to reproduce itself. I love my lathe, it's my baby. Don't mess with my baby!

[@finster101]

Amazing model and really clever technique for making the gears you needed. Could you please make a video of the setup and how you ground your cutter to the correct shape.

[@johnferguson7235]

Was the initial trouble after first assembly because there is not having enough backlash? It would be nice to know the pitch of the gear and the material being used. I have the impression that English is not your first language. Thank you for including the captions so that we can follow along. It is a very interesting process that you have developed. Your video captures a lot of interesting detail. The lighting and the framing is quite good. I will check out the other video, I hope that there is information about how you create the cutter.

[@tonycstech]

Are you using your own made tool or some kind of tip ? I can't see what tool you use

[@CLAUDIOGRASSIASTRArc]

I've made tools by myself

[@Travisfromoregon]

I would suggest using a reamer to get the final size on the hole.

[@partsproduction]

Normally here in the US that process would be called shaping rather than broaching. You did a great job of grinding the cutter, considerably harder as the size gets smaller. For what you are using the gear for I don't think it matters that it is not a pure involute form.

[@MartijnvanGene]

Why didn't you do all four at the same pass? That way you can be sure that they all have exactly the same tooth depth?

[@fbalistreri75]

Nice work. Do you grind your own broach tools?

[@sprescav]

i'd like to shake your hand man.. such a work!!

[@CLAUDIOGRASSIASTRArc]

thanks man!

[@Milutin958]

CLAUDIO GRASSI Bravo kolega, ( 5+ )

[@filmproducentje]

It is beautiful, you're a genius. How did you get the idea?

[@Texaca]

thats is a lot of work... wow, thanx for filming and showing us this. Wish I had taken shop in school, but I don't think they offered in the little town of Palestine. Never heard of the term "broaching". Thanks again.

[@justincase948]

Great work 👍👍

[@Souliee]

I would say "not bad" aswell! ;)

[@hagki]

Good work Dude! And I love that asmr

[@asyxcv14]

Hey good work! Very interesting how gears can be produced even on a lathe. Never saw this before. But to me it looks as if you do not work with a lathe very often, or at least never had a professionell instruction. Different cutting speed for other turning diameter, feed rate, so on. Or you just don't care thinking "well it has to work in the end". Sorry. I'm german... i like to do things perfect! Although great Job, keep going!

[@CLAUDIOGRASSIASTRArc]

"Different cutting speed for other turning diameter, feed rate, so on...." Sorry but where did you see all this in the video to affirm that? Although thank you for appreciation

[@CLAUDIOGRASSIASTRArc]

I'll try to upload a video soon ... Meanwhile I can tell you that with the help of autocad I designed several 3D models of the teeth, then interpolating them I found the right profile. due to the small size I could easily approximate the curve in an arc of circle and then with the help of grinder mounted on milling machine I modeled the HSS tool that you see in the videos

[@krav3n1]

good day, I would like to know to which is the gear set I make ... and function meets ... Thank you very much ...

[@celtic957]

How do you know how far to rotate the chuck when preparing to cut the next slot ?

[@attiksystem]

Is broaching possible with very hard metal too? Where did you buy this accessory for doing broaching?

[@tamosemgrana]

How is made the tool profile? Oops I forgot to say , Great job ! excellent !

[@CLAUDIOGRASSIASTRArc]

+Arthur Silva Thank yuo, I simply designed shape and then I grinded by a piece of HSS using the grinding wheel mounted on the milling machine

[@emyrhopkins8726]

dunzent it upt alot of strain on the lathe feed pinion and how did u sharpen the cutter and will it do steel

[@sanyasiraosenapathi3164]

Good process of gear cutting / broaching on lathe

[@CLAUDIOGRASSIASTRArc]

+Sanyasirao Senapathi Thank you very much!

[@jowieobumani8917]

How do divide the no.of teeth in.lathe machine?

[@marcopolio99]

normally you would use an indexer and divide 360÷the number of teeth you need

[@aubreyaub]

Love the sound of straight cut gears...! Normally, I find it easier with some steel wool, #1 knitting needles, bottle of sherry, rocking chair on the verandy and knit 'em up, before bedtime. Oh, but your method seems nice, too.

[@srinivasansanthanam749]

I have done gear cutting in hobbing gear shaping gear milling .But this is marvelous.good.

[@CLAUDIOGRASSIASTRArc]

thank you!

[@jimburnsjr.]

awesome.. i would have never thought of that.. thanks

[@bad19721972]

es increible q todabia se maquinen asi los engranes como con las patas ,como si no existieran maquinas generadoras de engranes, ya progresa neardental.

[@rajkumardhiman8978]

I am answering that how to make accurate tool profile. The easiest way is to do the wire cut EDM on your tool. The CNC machines has the software to get accurate gear profile of your need. Good idea to broach a gear on lathe machine but today one has a lots of other fast and accurate methods to make gears.

[@JahanZeb1976]

Excellent work performed. Great project.

[@an_what]

Like Butter! Great job yo!

[@alfredodeleon5845]

if i were you i will do the last drill of 4mm straight thru slowly,not pecking back and use oil or kero,this will give you fine finish and smooth drilled holes

[@CLAUDIOGRASSIASTRArc]

Hi all. Many viewers ask me why I have used this method and not a mill and dividing head ... the topic was treated repeatedly over time. This method has been invented to produce internal gear and later adapted to external gears. I could not use the mill because these pieces are too small to be machined precisely in that way. I invite you to watch the video kzbin.info/www/bejne/aoKvl6eIoa2roJY Thank you very much!

[@thefreak9140]

hi there claudio i just have one question how did you manage to get an accurate distance between each tooth how did you divide it accurately on the lath? hope i managed to get you to the point

[@CLAUDIOGRASSIASTRArc]

+mohamed farid I invite you to watch the video kzbin.info/www/bejne/oqLVloqpor16as0

[@thefreak9140]

+CLAUDIO GRASSI woooow that's awesome 😲

[@KostyantinKravchenko]

How you could sharpen cutter for involute profile?

[@jimmccrae3221]

CLAUDIO GRASSI

[@Tryin2FlyII]

You my have already answer this so I looked but didn't see it just wondering if the tool you used was made or bought? sorry if this is a stupid question but I m new to all this and want to learn as much as possible thanks for your time

[@CLAUDIOGRASSIASTRArc]

Simply said, all the equipment you see in the video is handmade, nothing has been bought because the tool is made for this non-standard working

[@Askjerry]

CLAUDIO GRASSI That answered my question... so you had to grind the cutting tool first. You are very patient and systematic. Excellent work.

[@kontakt4321]

Sorry if this is a stupid question or asked previously, but why couldn't you do this for 2 or 3 gears at a time?

[@CLAUDIOGRASSIASTRArc]

I have tried to do more pieces at a time, but the first one was different from the last because of the bending induced by processing, so I've decided to make it one at a time even if this resulted in longer times

[@kontakt4321]

Thanks for the reply. That was my best guess, especially with the diameter you're working with. I do love tedious tasks (probably why I spend time on KZbin watching other people do them), but that bunch of gears must have taken you quite a few hours. Great video. Keep it up.

[@jeffryblackmon4846]

You could have used a center in your tailstock.

[@arjanwilbie2511]

Would this type of cutting work in mild steel for cutting key ways?

[@CLAUDIOGRASSIASTRArc]

Arjan Wilbie The method could be fine . I also used mild steel in this video and I think it will work for your needs

[@cbeaulac]

hard on the crossfeed, but im impressed, always happy to learn something new for my trade.

[@albertousman7624]

Muy, muy bueno su clip, Claudio. Agradezco por compartir, su conocimiento. Pregunto: cómo preparara el buril?? De nuevo gracias, y no deje de publicar. Atte. Alberto, saludo fraterno desde Argentina.

[@АлексейГрачёв-й6р]

Простейшее устройство - рычаг плюс направляющие, позволят сделать эту работу быстрее и без катастрофического износа токарного станка. Судя по объёмам, автору ролика нужен зубодолбёжный станок ну или хотя бы фрезер.

[@Varyag53]

всё равно автор молодец. Хотя объёмы работ действительно требуют специализированного оборудования

[@stanleycarter6275]

+visnevskiscom it would depend on how well the tool is sharpened and the material being broached

[@laveshrughunanan7512]

do you know where i can find info on how to make the tool you use to broach the gears with?

[@CLAUDIOGRASSIASTRArc]

Lavesh Rughunanan the shape of the tooth you can calculate by following notions of any book on mechanics. I drew this form with CAD and I built a precise template which I later used to modify a grinding wheel

[@puneeth1987]

how did you manage the indexing angle..?

[@CLAUDIOGRASSIASTRArc]

+Puneeth.V. Kumar kzbin.info/www/bejne/oqLVloqpor16as0

[@jamesparmenter6894]

That is so awesome dude!!!! Thumbs up on this video dude!! Man I have thrown away so many gadgets because I couldn't replace a gear on them,but after watching this video I'm going out and try to buy me a cheap little lathe and practice on it until I get pretty good at it and then maybe move up to a more expensive one and really get into.Thanks dude.

[@3melendr]

James Parmenter May your dreams come true!

[@alfredodeleon5845]

to claudio brassi,your method is just simply another way to cut gear in the absence of the dividing head and a milling machine, viewers should know this,its like machining a bore on the shaper machine ,sounds stupid but between life and dead in the absence of a lathe machine,this might be the only option

[@CLAUDIOGRASSIASTRArc]

Alfredo you are totally right! at the time I made this video I had also a milling machine. I didn't have the right tools to make that and I decided to use the same method I used for gears with internal teeth

[@raulvictormartinez]

Hello, very good video !!! Excellent. I consult you, how do you manage to turn the lathe plate with the specific degrees ?. And on the other hand, how do you manage to lock the lathe plate at the time of machining the gear? Thanks and greetings from Argentina !!!

[@CLAUDIOGRASSIASTRArc]

I Raul, see this video... kzbin.info/www/bejne/oqLVloqpor16as0. I used the gears of my own lathe.

[@chakravarthyc2603]

your effort is appriciable,good work and gear teeth also not bad,before grinding its OK.regards.

[@CLAUDIOGRASSIASTRArc]

There's a X at the right of the Yello square, click it! ;)

[@JaredChmielecki]

I cannot click the X either - the yellow box displays the X on hover, but only for the bottom half of the box, meaning that the X is never there to click on, it just pauses.

[@CLAUDIOGRASSIASTRArc]

Jared Chmielecki I thank you for the tip! I provide to shrink the box so you can see better this video ;-)

[@truongdo1023]

CLAUDIO GRASSI

[@zabiahmadi9792]

The chak of mashin nat santer but your working vary goooooood

[@BilalKhan-do9il]

Do u rotate the chuck with ur hand ,if so hats off to u!!! Great job

[@chris-gx4fr]

Is that milk lol

[@LittleshopofFredrik]

Noce work! Very inspiring, now i have to go out in my shop and make a dividing-head attachment for my lathe :)

[@martinmuller9584]

Little shop of Fredrik o

[@yeshwanthreddy4946]

How many cycles does the tool last?

[@jadoncramer6512]

Is this for swing on a model dragline? Also with the size of the gears you are making and the fact that lathes are made to power feed into the part, the little stress you are creating is not any worse than taking a roughing cut. Good job

[@VortexBuffer]

When you are drilling the lathe shakes like hell, why's that? Doesn't look good.

[@MultiJono86]

Very cool. Just a hint for when youre counter sinking or counter boring on a lathe: slow your rpms down and itll squeal and chatter less. Another tip: use only the tip of the centre drill to spot a hole, the shoulder doesnt do your drill any favours (drills are ground at 118deg incl angle and that looks like a 60deg centre drill (120 deg incl angle), that little difference causes the drill to start funny and its slightly off centre as a result. Great work!

[@radioguy1620]

wonder how you got the gear shape into the cutting or broaching tool, very good video . thanks for posting.

[@monkfry]

Great idea if you're in a pinch and don't have a shaper! 👍🏼

[@CLAUDIOGRASSIASTRArc]

Before writing judgments because they do not read the information on the video? You will also find a video on how I did it to index!

[@SpeedOfDark186Kmps]

Are you indexing from the backside of the head?

[@CLAUDIOGRASSIASTRArc]

Yes, take a look to my other vidios..

[@CLAUDIOGRASSIASTRArc]

You can find link in the info section of this video

[@chaitanyavedak2412]

when you ran it with the Drill, you could have added some emery paste between the gears, that would have smoothed out the contacting surfaces... Nice Idea by The way... :D

[@CLAUDIOGRASSIASTRArc]

the problem was due more to the machining burrs that the contact surface, the aluminum pieces that I have produced previously having no burrs worked straight away. I preferred to use only oil to avoid creating excessive play. thank you to comment it!

[@putative3]

Emery paste not good for gear boxes!

[@chaitanyavedak2412]

I meant that using Emery Paste only for the Initial Running In.. to remove any burr, and smoothen the contacting surfaces.. This was the most common method used while matching the Valve contact faces in an Engine Head.. the Emery paste would grind the contacing faces to a near mirror finish, and give a leak free joint.. In case of the gears, the smoother the contacting faces, the lesser the friction, after applying a little bit of oil while normal running..

[@monelfunkawitz]

putative3 It is when you are trying to open up gear lash and you remove it all when you are done. Lapping tight gears is normal when you aren't making parts for the Space Shuttle. I had a custom gear set I made that I was off a thou and a half overall cause of the tail stock and was too tight. After lapping it was smooth as glass. I flushed the gears really good, and it gets an oil change every year. That was almost 15 years ago and it is still in operation to this day. It has had more than one seal put in it and a shaft or two, but the gears still mesh great and the magnets inside the case stay clean.

[@shahzadkhan-hj7qx]

very perfect

[@chrisdicintio2058]

Hi love the video but was wondering why not ream final size, radius the friction faces and harden the steel, I'm not asking to be critical , just curious.

[@CLAUDIOGRASSIASTRArc]

Hi, you have made correct considerations but, in my case, it would be impossible given the small size, being able to grind the gears. The radius on the faces is already done by the tool that I shaped as precisely as possible and, for last, the pieces were not hardened because the steel used was not suitable to this treatment... thanks for question

[@yamanbala1843]

what´s the name of your machine? How could you cut the metal without turning of the machine?

[@arcanix51]

you can quite literally do this task on ANY lathe with proper set up. as for how the metal is cut with out turning the machine on: clearance angles on the cutter. this means a relief angle so that the cutter is not dragging on the part. you could see at least one of these relief angle when he started. the point of the tool bit had one side slightly more distant from the part. you also will not taking more than 0.001 to 0.005 at a pass .010 if you are brave enough to risk it. notice the part AND the tool were kept constantly lubricated. in this sort of procedure, you have to keep everything lubricated. everything else is patience, knowing your finish depth, and more patience.

[@SiriusBlack-qo3xi]

Did you make the tool too or is it available pre-made in market?

[@CLAUDIOGRASSIASTRArc]

+Sirius Black Cause I needed 0,7 Module I had to make by myself the tool I used...

[@SiriusBlack-qo3xi]

Hey... Appreciate the reply! I would really like to know how you made that.

[@rolis7736]

ok. one tiny nuance. how do you count the teeth ??? usually its made on dividing Head . but on lathe?

[@CLAUDIOGRASSIASTRArc]

take a look at this my video kzbin.info/www/bejne/oqLVloqpor16as0 ;-)

[@MBrega]

Ciao Claudio, video spettacolare prima di tutto. Sono nuovissimo nel mondo...volevo sapere che "strumento" é quello con cui fai l'intaglio ripetutamente...É semplicemente l'inserto dell'utensile da taglio? Grazie

[@CLAUDIOGRASSIASTRArc]

Ciao Mario, l'utensile è ricavato da una semplice placchette di acciaio super rapido HSS. Per ottenere il profilo adeguato è stato necessario affilare l'utensile con molta precisione e con un profilo studiato

[@BeautyEhful]

Hey man, How did you index it?

[@CLAUDIOGRASSIASTRArc]

Take a look at the video suggested in the yellow box ;-)

[@zurailazis05]

this is awesome! i wonder how you make your broaching tool? any videos?

[@CLAUDIOGRASSIASTRArc]

I will make a video as soon as possible

[@charlietuned]

how did you index it???

[@CLAUDIOGRASSIASTRArc]

Many people ask me how I managed to run the piece ... please, please, read the information and you will find the links you need!!

[@olefjellborg1696]

Impressive!

[@MrGoatflakes]

4:20 Brazzers lol

[@colgesuks]

since you have the gears pre-scored for depth why wouldn't you cut the teeth on all 4 at once instead of doing each gear individually?

[@CLAUDIOGRASSIASTRArc]

+Thisother Guy I tried but the diameter of the rod is too small and trying to broaching 4 pieces at the same time it flexes losing the precision I wanted

[@elclassico8292]

its amazng idea but i dnt undrstand how dd ya adjust the gear equaly sized

[@CLAUDIOGRASSIASTRArc]

you can find other links in the description on how I turned the lathe into a divider

[@CLAUDIOGRASSIASTRArc]

Yes, I grinded it and sometimes I have to sharpen it ... You can see in my other video "BROACHING INTERNAL GEARS ON LATHE"

[@ugafan1779]

Pretty impressive. How did you ensure the indexing is correct? Nonetheless, very impressive.

[@CLAUDIOGRASSIASTRArc]

see this video.. kzbin.info/www/bejne/oqLVloqpor16as0

[@_P0tat07_]

Damn. Lathe really can duplicate itself (if you were actually making gears for the lathe) Also, you should slow your RPMs for countersinking and feeding. It doesn’t look like it was causing too much trouble except for that god awful squeak.

[@axel5752]

Muy bueno ❤. Pero me gustaría saber como afila la herramienta de corte !

[@CLAUDIOGRASSIASTRArc]

Avevo usato una mola sagomata montata sulla fresatrice

[@bryancas471]

How you made the tooth counting?

[@AlekseyCamodelkin]

Here it is so a turner, Supreme Class

[@treatb09]

i'm going to build a watch i've designed. but one problem is finding a lathe that is accurate enough and affordable, since i can't actually go anywhere to see lathes. do you have an recommendations for a lathe around 1500$ that is as accurate as possible? .0001 would be good. n i know there are way to make less accurate lathes better without having high toleranced parts, but i'd prefer a strong and well toleranced micro lathe. was looking at the sherline dro package, if anyone has any input.

[@kevlar_87]

Nice work! Quality craftsmanship.

[@wa4aos]

Very helpful video. Thanks

[@Sketch1994]

You could possibly leave 0,01-0,03 and then run the gears with fine lapping compound to get perfectly set and fine ground gears... Nice

[@rlabiche]

awesome job may I ask how did you get the gear tooth shape on your cutting tool

[@CLAUDIOGRASSIASTRArc]

I will make a video as soon as possible

[@antoniolorentejuberias2581]

el que diga que esta mal hecho porque no entiende

[@tspark1071]

seems it works, but too noisy. try to reduce noise.

[@godsloveministry4195]

Looks like not just the peice move but also the chuck.

[@CLAUDIOGRASSIASTRArc]

+GodsLoveMinistry Yes, it's right in this video you can see why... kzbin.info/www/bejne/oqLVloqpor16as0

[@cassanoa]

excellent

[@philperry6564]

What material is that gear made out of? Steel?

[@CLAUDIOGRASSIASTRArc]

yes, european C40

[@sebastiaodonascimentoduart1558]

parabens ferramenta boa , serviço perfeito.;;;;; estou com um plano de motar um torno caseiro pra pequenos servirso