Cutting an Internal Ring Gear on the Shaper
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- เผยแพร่เมื่อ 29 พ.ย. 2024
- In this video I go through all of the steps to cut a 40 tooth, 16DP, 20 degree PA annular gear. The steps include grinding an involute cutter, preparing the gear blank and cutting the gear teeth on the shaper.
Awesome!!!.....Thanks so much Robert for all your hard work in making this video. As with other comments you can clearly see that the set up takes an ENORMOUS amount of time. The results are excellent.
I personally liked this video in one part. I put this particular installment on hold until now so that I could watch it on a relaxing Saturday afternoon.🤓👍🏻
You managed to make the first gear tooth cutting video that I fully understood so well done and thankyou very much.
Sliding that external gear into the internal one must have been incredibly satisfying. Very cool indeed
Thankyou for sharing
Thank you! Gears can be quite a mathematical subject. Glad you found this understandable.
And yes, when I tried sliding the gears together I did not expect such a good fit. I obviously got lucky!
@@ThePottingShedWorkshop Thats not luck thats skill and accuracy
I’m fascinated with how you generated an involute form cutter. Amazing work, thank you for sharing.
Thank you. Grinding the cutter was a logical follow up to cutting gears with the shaper.
I’ve tried to work that out for some time, I really appreciate that you demonstrated that process. I am going to use your method. I have never been interested in an approximate gear tooth form. You have given me a huge leg up.
Awesome work & demonstration & filming & editing & presentation, explanation of the math & trig to get there. Great skills on every aspect.
Now I just need to fill my ears with cotton wool, and take a wee nap, because my brain is bleeding from my ears trying to understand it all and is literally exhausted & needs a rest - & I only woke up 2 hours ago, so that’s how taxing it was trying to understand it all.
Kudos to you for even being able to figure all this out, let alone actually do it.
Thank you very much! I used the copper wire rack model because it is very visual and gets the idea over without heavy maths. The gear cutting attachment does all the complex maths creating the involute for you, you don't need to understand how it does it, it just does!
Excellent video, very interesting part. Thanks for sharing it with us.
Thank you and thanks for watching!
Like the inteligence. Simple made tools not over complicating! Like your vids!
Thank you very much!
It was very nicely done, always inspirational to watch you work on your projects
Thank you! I'm trying to make videos that show something a bit different.
Extremeley impressive! Thank you for showing us mere mortals what could be done.
I think those two gears need to be mounted in a frame and hung in the workshop.
Thank you! The gears are in the collection of useless ones I've cut on the shaper, along with the 9 1/2 tooth gear!!
Really interesting video and very informative. Thanks!
Amazing work,Robert.Thank you.
Thank you for watching. Glad you liked it!
That's just the ticket for a home shop to cut a one-off gear for a machine in need of help. Too often there aren't parts for sale for old machines, at any price. Thank you for the spectacular work proving it can be done!
Thank you! I designed the gear cutting attachment for the shaper because I dislikes having to spend out on a cutter for every gear I needed! Its come in useful, cutting non standard DPs for replacement gears to replace a lathe helical back gear with a spur gear - before I'd worked out how to do helicals with it. In principle, it should be capable of doing profile shifted gears too.
Thanks, Robert, and well-done as always! I appreciate the theory work, too!
@@thomasstover6272 Hi Tom, you're welcome. I couldn't find much regarding the math of internal gear teeth, so I went with a simple illustration that I think worked pretty well, for me at least!
this was again very interesting. and indeed often the setup takes more time than the work👍🏻
Thank you. All the side projects done off camera took most of the time. Not including of course the 3 months it took me to make the shaper gear cutting attachment a couple of years ago.
Gday, certainly a ton of work in setup but with all the effort, the fit between the 2 couldn’t be better, great job mate, cheers
Always the same- hours of setup and minutes of cutting.
Thanks! I was chuffed with the way it came out.
Hours of setup? Days, weeks?😂
hello Matty, nice to see you here too.
Great video. Nice explanation of everything.
Thanks! I try and keep the explanations simple.
Morning Robert, set up DAAAYS😅. As always very interesting, nice to see you master a new technique. Gears would look good in different coloured anodising.
Keep them coming
@@Griffon37 Thanks Jon. The whole saga took about 3 weeks. I've got footage that didnt make it to the final cut as it was a distraction, like the grinder motor shaft shearing off and me having to repair it! The next video will be delayed - I've acquired a better condition M300 so will be doing that up. That'll prob be the subject of the next video.
Very impressive, Philadelphia Pennsylvania, USA
Thank you!
Well that was a lovely job Robert. The way that spur gear slid into the ring gear was confirmation of the time spent on the calculations and setup. For me you could do a full series on how to do the calculations for various types of gears.
Toms Rabbit Hole does some wonderful gear setup and cutting as well with his homebuilt hobbing machine, but this seems to be a more achievable way for us mere mortals.
Thanks Bill. Yeah, the fit of those gears was really pleasing! It would be nice to do something with the ring gear, but there's a problem... I've just bought another lathe!!
@ThePottingShedWorkshop Yeah, I've got one too many lathes at the moment. I'm hoping the old Roundhead Triumph will be going soonish, I'm desperate for space. Looking forward to seeing the new machine in harness.
Thanks for your time sir . Its great job to see what I can do with my shaper
You are most welcome! They are a bit old fashioned, but can do some jobs that might otherwise be awkward. Just takes a bit of imagination... and a lot of time!
Awesome work!
Thank you!
this was an awesome video. I always want to know how gears were made. I would love to see how ring and pinion axle gears are made.
Thank you! I've got several videos on cutting gears, spur gears and helicals, with the shaper, including the maths behind the gear train setup.
Bonjour , très intéressante approche du taillage de roue , votre maîtrise es impressionnante,vos vidéo et votre travail sont d’une grande qualité et mettent votre grande expérience et maîtrise de l’usinage à l’ancienne en avant . Merci pour votre partage de connaissances . Cordialement Thierry.
Merci beaucoup!
Well, that sure is an interesting experiment.
A bit of fun to keep you all entertained😁
Just Genius
the amazing grinder setup is a lump to be held off the Lantern, perhaps a block mount to replace the clapper would be more rigid ??
Thank you.
I'm sure it could be improved upon. This was a result of my first ideas. Having done it, I now know lots of things I should or could have done.
Bear in mind the weight is tiny compared to the cutting forces that a shaper, even a small one like mine, can generate!
I just realized the method you used to grind the cutter, could be applied to finish grind OD gear teeth, after heat treating by using a shaper.
Bloody amazing.
Thank you!
Really interesting, thank you. 👏🏼👍🏻
@@stephenperry5849 Thank you! Something a little different I hope.
Well done!
Thank you!
Impressive
Thank you!
Robert having seen your workshop i forget to ask, winter is here how do you combat condensation?
@@Griffon37 The workshop is well insulated, floor, walls and ceiling. The doors aren't too draughty. The day before the weather is due to warm up I run my 3kW fan heater - its on the floor behind the mill - for a few hours and wince at the cost, but, hey ho, needs must. Not 100% effective as a couple of chucks got a few brown tinges, but generally it's ok.
Nice!
Thanks!
Amazing work! You are on another level! Are there any resources you can share from this? I'm trying to take it all in. How did you set up the formulas in your spreadsheet? Thank you and all the best, looking forward to more quality content!
‘Gears and Gear Cutting’ by Ivan Law is a good place to start for the conventional methods use to cut spur gears in the home workshop. I’m not sure he goes into ring gears though.
A tour de force Robert. It is a long video but viewers can just stop at a convenient point. Not taking anything away from the painstaking approach you took but I wonder how close one could get by generating the cutter profile in CAD then grinding the tool by eye, certainly some good magnification would be required.
@@tonyray91 It is indeed a very helpful book but from memory I think he only deals with practical methods of cutting spur gears but not internal ring gears.
@@tonyray91 CAD modelling would certainly be useful
Thanks for watching! The spreadsheet is described in part 2 of the series of the shaper gear cutting attachment. For resources I've done a lot of searching on the internet, I've Ivan Law's book and used Machinerys Handbook too.
I like the full video format since I don't like cliffhangers. Is there a limit to how small an internal gear can be made using this technique, since I assume the tool would narrow towards the "root" (which would be the crest on the ring gear's teeth)? The wide area in the middle would cut away material that should be there on the theoretically correct shaped internal tooth crest, I assume. I don't know if that would ultimately matter, though.
Thanks for the feedback! I guess the lower limit for cutting internal gears with this technique will be hen a gear tooth starts to get undercut, so around 20T for a 20deg pressure angle. Such a small ring gear wouldnt be very useful though as the pinion it engages with has a size limit somewhere around half the number of teeth of the ring, as various interferences come into play.
@@ThePottingShedWorkshop next video: "cutting a helical internal ring gear"
@BronzeAgePuritan I have a technique to do this! Its the second technique for cutting internal gears that I didnt describe. I'll do a video on it one day, but that won't be for a while, as I've got a new to me lathe coming thats in better condition than my current one but it needs cleaning and fettling.
@@ThePottingShedWorkshop Congratulations on the new machine. It's always nice to get acquainted with a new friend.
I will never gripe at the price when I need to purchase a gear.
💯💯💯🤸♂🤸♂🤸♂🌟🌟🌟
Thanks!
Nicely done..
Thank you, and thanks for watching!