Making gear cutters in the home workshop using Eureka tool

In this video, I make a Eureka form relieving tool based on the design in Ivan Law's book Gears and Gear Cutting. Having made the tool, I use it to make a set of Module 0.6 gear cutters.
The steps in the video are: make the Eureka tool itself; make the button tools that are used to profile the cutters; make the set of gear cutters.
In the video, I make the mandrel and indexing sleeve for the tool. I had already made the other components.
I made number 2 to number 7 cutters. A number 1 cutter is needed to make gears with 135 or more teeth, which is a size I don't expect to need. A number 1 cutter also requires a button tool with very large diameter buttons, which can be impractical without cutting away portions of the buttons to avoid clashes with the Eureka tool.

[@bobuk5722]

Folks, this is the first time I've seen a video about making the truly wonderful 'Eureka'. As far as I know it's the only video about it. The tool solves a very, very tricky problem, that of automating the manufacture of the complex tooth shapes required on an an involute gear cutter. It can make cutters for any size of gear with any number of teeth within its size range - either diametrical or modular pitch. It really is a wonderful invention and I strongly recommend anyone interested in gears to have read of the book mentioned in this video. You will learn a lot! Liked and sub'd.

[@steelcappedstrength]

Hey, here is another person that made one of these gear cutters if you're interested. kzbin.info/www/bejne/joKbqGlvZr-ZfKc

[@wadekmroczkiewicz7597]

Seks

[@coverfrequency2305]

I have schematics of this mechanism in a gear cutting Machinist book but first time seeing one work.

[@dallet40]

Попробуй чпу. Там любые кривые можно делать. За 30 минут максимум.

[@timogross8191]

No robertt4522 made a video with eureka tool a while ago: kzbin.info/www/bejne/fJDaamV5erKfipY

[@openclockclubarchive325]

Exactly what KZbin is for. Sharing invaluable knowledge

[@tilliesinabottle]

I read that Ivan Law book last year, that eureka tool was quite the holy grail for home making gear cutters.

[@dalelathwell7219]

Very impressive and to see it made with machines that are realistically affordable for a home workshop similar to my own 👍

[@dpeter6396]

I first saw this device about 10 years ago and fell in love with it. At the time I had plans to build some things requiring gears but life changed and I never built the tool or the project. This is an excellent addition to Ivan's book and will serve to guide those who will build this tool!! Excellent. Thanks.

[@ferrumignis]

Fantastic video! I'd never really considered the process that would be needed to provide relief to the sides of the teeth, really ingenious.

[@jamesbooth3360]

Finally, someone makes this fabulous tool on KZbin! My favorite book in the series. You earned my subscription as my way of saying thanks.

[@MetalMachineShop]

Thank you!

[@MatthewRulla]

Nice presentation. I made the Eureka tool about 15 years ago and I've since forgotten many of the steps it took to get the parts made. Keep up the excellent videos!

[@stxrynn]

Very well done. Great attention to detail and very clear video production. Thank you!!

[@MetalMachineShop]

Thanks!

[@pauayelo3024]

Amazing , its great to see videos like this , si that old techniques of making things dont get lost in the past.

[@petermcneill80]

Very impressive work , I’d never seen anything like that done in the home shop before.

[@StefanGotteswinter]

Mighty impressive, enjoyed it a lot 🙏

[@MetalMachineShop]

Thank you, not quite up to your standard yet though unfortunately!

[@StefanGotteswinter]

@@MetalMachineShop I think its very, well made 🙂And the first long comprehensive description of how it works and is used on youtube - thanks a lot for that!

[@sushantbolinjkar3477]

I have no words to express. I'm speechless. Marvelous creativity and marvelous engineering. 👌🏼👌🏼

[@nickj2508]

I always wondered how the relief was made. Nicely done. I learned something new. 👍

[@peterahjorter]

Always amazing to see how many smart tools there are available

[@charlvanniekerk8009]

my mind has never been more spectacularly blown. Firstly i never knew the Eureka tool existed and now that i do i will never be the same

[@MetalMachineShop]

Haha I enjoyed your comment!

[@sharkbaitsurfer]

That is seriously magnificent work and that eureka tool really is quite something. Colour me impressed

[@MetalMachineShop]

Thanks, glad you liked it!

[@wibblywobblyidiotvision]

That's fabulous. Well done!

[@_MadFox]

Wonderful! A wonderful homemade! Thank you for sharing!

[@dlfabrications]

I made this tool two or three years ago. Never got to try it out because the price of tool steel(water cooled) was a ridiculous price in my neck of the woods. Thank You for the time you invested in this video.🙂🙂🙂

[@davidtaylor6124]

Same here - once I realised silver steel plate was involved it was a hard no. That stuff is stupid expensive in Australia. I was fortunate enough to be given some for my loco expansion links because otherwise they'd be mild steel.

[@poppa5289]

Fabrication is an art form, Well done Sir 👍

[@grahamokeeffe2196]

I have the drawings for one of these in my books, nice to see one made and in operation, well done.

[@woodndrum303]

Great video technique and content. This is the only video I've found showing this unusual tool. Fascinating to watch, makes the text in the No17 handbook come alive.

[@JaredAF]

Amazing to see how it's done

[@markenna5955]

wonderful solution, this will make gear cutting economically possible

[@davidsnyder2000]

Loved this video. A lot of content in one video. I most definitely liked and subscribed 👍🙂 Thank you taking the all the extra time to film and edit everything. I know it’ adds quite a bit of extra work, but I appreciate it.

[@MetalMachineShop]

Thanks, I’m glad you found it of interest, makes it all worthwhile.

[@Rustinox]

A lot of work but very interesting and well worth giving it a go. Thanks for posting this.

[@graedonmunro1793]

absolutely stunning what you have done,, i don't think i would have got past the first step!

[@leedoss6905]

No need for CNC and people don't realize it. Fantastic demonstration.

[@machinist_matt]

You've earned yourself a sub, that was very interesting! A lot of work goes into making those gear cutters, and I now know why they are so expensive! 😬

[@SRG-Learn-Makers]

Really awesome. Thanks for sharing.

[@mickgentry8128]

Brilliant video, very enjoyable ! thank you.

[@zvonibab]

As hobby machinist I am amazed with your knowledge and craftsmanship, well done Mister

[@MetalMachineShop]

Thanks!

[@stevengehm1287]

Very Nicely done! Eureka!

[@HuFlungDung2]

Years ago, I built a hydraulic relieving attachment. It had a large cam with 8 lobes that drove a piston placed beneath it like a steady rest clamp. The cam was mounted on the same mandrel as tool blank, between centers. The piston was plumbed to a slave cylinder with a reciprocating piston in the toolpost. This slave piston had the tool bit sticking out. This worked. The problem is vibration and chatter marks on the work as the tool enters. So i did the relieving before I cut the gashes, this way I could pick the best position to make the gash. I did all this because I couldn't find a special stub tooth gear cutter. Otherwise it's difficult to justify the time spent doing this.

[@MetalMachineShop]

Sounds like an interesting challenge at least! Could probably use the same set up as a follower for profile turning.

[@LetsRogerThat]

That was a very complex process. Worthwhile knowing about and interesting to watch. And it it convinced me to keep buying cutters. Great video. Gilles

[@MetalMachineShop]

I agree, buying cutters saves time!

[@who-gives-a-toss_Bear]

Brilliant presentation. Very clear and informative. The home made cutter grinder, very simple.

[@MetalMachineShop]

Thanks!

[@russtuff]

I just stumbled across your channel, and hot damn that's some fantastic work. And I thought I was already subscribed to all the good machining channels on KZbin.

[@MetalMachineShop]

Thanks!

[@9traktor]

Very fine work. Respect!

[@MetalMachineShop]

Thanks!

[@joesmith4494]

That was an excellent video you have my subscription

[@MetalMachineShop]

Thanks!

[@DavidHerscher]

Brilliantly done sir

[@MadJack-yl6od]

Awesome video, answered questions I didn't even know I had!

[@magnusklahr8190]

Fantastic!! Great video!!

[@smudgemo]

Super-interesting book and beautiful work. The author notes that the mystery will unfold when the reader views the finished product, and he was correct. Now I understand. Not likely I'll ever build one, but you're reminding me that I need to get back to work on my Harold Hall Advanced Grinding Rest.

[@MetalMachineShop]

I made a HH grinding rest too! Very useful tool.

[@guye7763]

Well done, very impressive.

[@kabovasya]

Гарна робота !!!!Респект!!!!!!

[@homemadetools]

Great job on this tool. We shared this video on our homemade tools forum this week 😎

[@normtheteacher5485]

Thanks for the video for learning purposes. Your very talented.

[@MetalMachineShop]

Thanks!

[@davidtaylor6124]

Great work! I enjoyed that.

[@AmiltonJr]

Brilliant work. You're a true artist with great knowledge.

[@MetalMachineShop]

I’m happy you liked it!

[@sky173]

Nice work. I'm just getting into gear cutting. This would be a great project. Thanks for sharing,.

[@RalfyCustoms]

Absolutely brilliant, thoroughly enjoyed this, subbed 😀

[@lecnac855]

That was excellent. Well done.👍⭐

[@MetalMachineShop]

Thanks 😊

[@charlieromeo7663]

Great work! Ever since I needed a 22/29 DP with a 20 degree PA gear for my Hardinge HLV-H, gears have really interested me. Cutters for Fellows Stub are very difficult to find. You have given me hope to eventually cut my own gears for my lathe. Cheers from Florida’s Space Coast!

[@MetalMachineShop]

Good luck, you can make simpler cutters using the button tools but without needing the Eureka tool. The Clickspring channel has some good vids on the subject.

[@georgef1176]

Bro that is so amazing.

[@user-hc2bm9bj7q]

это уникальное видео. такое полезное не каждый день встретишь

[@MetalMachineShop]

Thank you!

[@dermotkelly2971]

Great stuff I have never done anything like that!

[@storminmormin14]

At 1:33 he sets the cylinder down on the glass and it continues to rotate. Really satisfying.

[@jerrypeal653]

That’s very cool.

[@user-zq9ks8ib9r]

Это поразительно! Сколько труда человек вложил! А у нас немеряно таких фрез ушло в металлолом, как же это больно... Да и не только фрез...

[@MetalMachineShop]

I’ve rescued some good stuff from machine shop scrap bins before!

[@union310]

I met Ivan a few times, nice chap.

[@AndreLuiz-gk1mf]

That motivated me. Thanks

[@henrikb.andersen5150]

Very informative,- thanks, must be tried. 👍

[@alejandroluer]

Eres un artista. Mis respetos! Saludos y larga vida!

[@WrenagadeWorkshop]

That was very cool to see, thanks for taking the time to document your build and sharing. I'd love to make one myself one day, along with a banjo for a mill table so I can make helical gears.

[@Miniatures-And-More]

Amazing !

[@6NBERLS]

Most excellent.

[@diyfireking]

Well done 👍👍

[@spudzwon]

I made many of the parts for one of those but sold what I needed it to make gears for and never finished it. It was a fascinating device.

[@MASI_forging]

Look fabulous as always 🙂🙂

[@alejandroluer]

This is insane!!!!

[@paulrayner4514]

I have that book somewhere, I will have to did it out, many thanks👍

[@Preso58]

Nice job. I had read about the Eureka tool in old back issues of the Model Engineer magazine but I'd never been able to see it in operation. It almost seems to be too good to be true.

[@SamGlasser]

Very Nice!, Good detail an explanation. Obviously you know a lot about machining.

[@DK-vx1zc]

excellent work! thanks for sharing.. subscribed

[@xiasonic]

wow... this is awesome tip thx

[@krokodilchik]

Amazing job wich dimands knowlege and smartness , skils, and ,,straight ,, hands . And at the same time he has finger of a piano player... A big respect and regardes from Armenia..... He is talent!

[@MetalMachineShop]

You wouldn’t want to hear my piano playing!

[@krokodilchik]

😂😂 I guess.. i told it in good sense. Because in territory of past soviet union a man who works industrial specialties suppose to have hans of godzilla. Dirty ,hardened skin with cracks barbs that can injure a human..

[@MetalMachineShop]

@@krokodilchik haha I should get my hands dirtier!

[@gjkozy]

Remarkable!

[@workaholicada319]

High precision and fast speed

[@Lordosvk]

Just wow 😮

[@kerrywil1]

Very impressive.

[@MetalMachineShop]

Thanks!

[@Somagraf2]

Muito bom aprendi bastante com seu video, Att. Vicente

[@YooProjects]

Very interesting video 🙏

[@aj7utu]

In the book cited by Law, it’s remarked that a set of gear cutters were out of the range of hobbyists, giving rise to the last chapter of the book on which this video I’d based. Now you can buy a Chinese set for under $70.

[@jimsvideos7201]

Thank you for the fine work on the video and the part! I've purchased a few cutters but this seems like an intriguing problem and perhaps a cost savings too.

[@MetalMachineShop]

Cost saving at the expense of a lot of time though!

[@haideralam1]

Awesome

[@keithgarland3404]

Very interesting, read articles about the Eureka tool, with mixed results of building and using it.

[@Bianchi77]

Nice video shot, keep it up,thanks :)

[@MetalMachineShop]

Thanks, more to follow soon!

[@mikeskupniewitz8057]

Neat … I made my eureka tool a couple years ago and posted a video here to which had some views… but have yet to make blanks and button tool… some day… it’s a good project/tool to make and have in your arsenal…

[@the_ure]

#1 also good for rack and pinion...

[@bil7125]

I just saw the thumbnail and the first 5 seconds of the video and already went trough "no way", "jooo wtf" and "this is brilliant".

[@atiger4716]

So we'll explained! Thanks very much. A new subscriber here 😁

[@MetalMachineShop]

Thank you!

[@gordon6029]

Just found your channel. Subscribed!

[@MetalMachineShop]

Excellent, thank you!

[@campbellmorrison8540]

What an excellent video thank you. I've heard of a Eureka tool but never seen one in detail and in action. All out of my ability so purchased a set of M0.6 cutters, I know its cheating but aliexpress is very tempting these days and to be honest I'm very happy if I can just cut a gear let alone make the cutters. I have subscribed :)

[@MetalMachineShop]

I must admit, I did regret not just buying the cutters!

[@TalRohan]

very cool, not sure I can do all that with just the lathe though...atleast not at this point, maybe with more experiece and some wierd tool builds under my belt.... those books look fascinating too thanks for sharing

[@paulkurilecz4209]

Beautiful work! I have always wondered how I might make the occasional gear with out spending a large pile of money. I will have to find the book. tyvm

[@MetalMachineShop]

You can make simpler fly cutters using the button tools without having to gi to the triuble of making the Eureka tool. It's all in the book.

[@laurentl3064]

bravo

[@mrnobody9821]

The book mentioned is : Gears and Gear Cutting - Workshop Practice Series 17 -Ivan Law

[@tarmovirves]

Very informative, nothing extra.

[@user-uz1sz1rf7k]

Благодарю за видео

[@MetalMachineShop]

You’re welcome!