Making a ballshape on the milling machine
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- เผยแพร่เมื่อ 13 มี.ค. 2020
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ah.....more hip joints for This Old Tony :D
I thought they were knuckles for his bionic hand... =)
:-D
@@atheistsfightclub6684 lol
That is amazing! Thank you for sharing -- I never would have thought of this creative way to make a ball
I also have Tom's book. It's full of good stuff. Thanks for sharing Stefan 👍
About forty years ago an old machinist gave me a hint on how to do this. Last year I finally was able to use this method. I rebuilt a $4000 dollar three way ball valve. The ball was about three inches in diameter. I had similar results. Made it from 303 SS.
A circle of any diameter can be inscribed any place on a sphere.
I dont understand, a circle of diameter larger than diameter of sphere cannot be inscribed on the sphere.
A circle of diameter less than or equal to the diameter of sphere can be inscribed.
@@subuktageenfarooqi5712 If you use the muscle between your ears, you might understand that a circle of larger diameter than the sphere you are generating will not work. But if the circle has a diameter that is equal to or less than the diameter of the sphere,and the centers of rotation intersect, a perfect sphere will be generated.
Awesome! The boring head actually can be used in the tool post on the lathe just like a ball Turner. But this looks much easier really.
i really like this idea of yours when it comes to machining a workpiece as a double ender. I have seen it a lot in your videos on grinding endmills, but never thought about doing the same with workpieces. Here´s hoping i remember this the next time i need it.
Very, very good. Puts new idea's in me noggin.... Thanks Steve, great video!!!
As always, very informative, entertaining, and clever!
Thank you for putting in the extra time that it takes to make and edit the video!
Thank you, Stefan! :)
Always enjoy watching your videos. Thanks for sharing your thoughts and skills with us.
George from Indiana US
Loved this. Never thought about doing it this way yet after watching it made me wonder why do it any other.
Those close ups are so satisfying to watch ! Great video
Very cool technique demonstration and really well explained. Thank you!
Nice video Stefan, I seen this years ago but completely forgot about it. I can not even begin to explain how much I enjoy your channel.
I seen, is that like I diot ?
Clever machining Stefan, excellent vlog as per usual.
Thanks for sharing.
Hey Stefan I saw your post about these a little bit ago and I was so so hoping you would do a video on it, the finish on these is gorgeous, Ill bet your friend is the best looking chef at their place of business now. And I have to say.... who needs a ball turner when you get such an awesome finish like that on a mill. Learning things from you all the time, thanks so much for the knowledge :)
Really great video Stefan.
The company I worked for used to use this technique to make optical lens smoothing and polishing tools in cast iron and aluminium. Both convex (like your ball) and concave with radius from under 3mm up to several meters (almost flat). Although we rarely needed anything more than a hemisphere.
Thank you Stefan - oder soll Ich sagen - Danke schön Stefan for sharing this video showing your ability to solve a problem in addition to your excellent machining expertise!
Stefan,you are brilliant,always enjoy your beautiful videos,please keep them coming.
You are an amazingly talented person and so very generous for sharing your knowledge. Thank you very much.
Another very interesting video, thanks Stefan. I always enjoy seeing difficult work holding solutions.
Cool ball-making technique! Thanks for sharing.
Stafan -
Unglaublich hilfreich, um Ihren Denkprozess in Ihren Projekten zu sehen! Danke! ( English: Incredibly helpful to see your thought process on these projects! thanks! )
Todd, your Chermann is better than my German!
I have heard of the technique before, but first time seeing it action. Thanks for the demonstration.
See, this is what international collaboration gets us. Greetings from the US, stay safe out there!
Ades workshop has a good series of videos on making a ball turning tool post for the lathe, i did actually wonder how you would do it differently whenever it got to a bit where i thought "Stefan would put a shoulder on that..." It's very entertaining, well worth a watch, for the evolution of his ideas mid project if nothing else.
Nice job.I made the ball turner for the lathe using a boring head but mounting it into a boring bar holder from the front of the lathe.Mounted a round button insert on the end of a short straight bar to fit the boring head.Sort of a few ideas joined together from some old Model Engineers magazine articles.Turns balls within .025mm circularity which is fine for rough work.
Gday Stefan, I have never seen this done before, that works brilliantly, much quicker then using a ball turner on a lathe, thank you for showing another great technique, much appreciated, Matty
As I am older than many here, I do remember these and you made them correctly, as I remember (1960's) the crosshatching as being rather unique as you have done so.. and I am surprised that no one has brought this up. Your chef will be delighted as there is a high likelihood that this will be noticed.. You are a man of the trade consistently using time pr oven techniques.
Thank you for explaining the actual tool path at @6:36. It made it look very simple technique.
One of the most underrated videos this channel
Thank you Mr Stefan for one more awesome lesson!
How cool is that. Something I have never even heard of before. Thanks for sharing.
Great project. I even have that book...guess maybe I should read it.
Thanks for sharing!
awesome discussion/demonstration/build....great review at the end...
Clever method. Well done.
Thanks Joe!
Very cool 🙂 thanks for sharing!
For your friend's benefit, those fasteners are called Sam Browne studs, which might make them easier to find off-the-shelf in future!
Thanks for the video, a neat way to make a ball!
Stefan -- I couldn't figure out how you could cut the ball to the dead center , in my mind the shank would not allow that, I finally understood when I saw that the ball was rotating on an angle . Kick Ass video . You da man
Indeed. Also, it works equally well to tilt the head, on mills with this feature.
Stefan, this was a very interesting and educational video. Now I'll have to order Tom's "Sink or Swim" book -- I've already got his "Doing it Better" book. ;) I always look forward to your videos because I enjoy and learn a lot from your thought processes & techniques as you perform (mostly) precision machining.
Very satisfying and very simple.
What a great ball technique..never ran across this method before !
I can't believe I never thought of this! Great idea
Always good stuff to be found on your channel. You' have a gift for distilling down all manner of intricate processes, even for us novice types. I'll have to go take a gander at Tom Lipton's book. Thanks for helping me part ways with my money.
A revelation Stefan, thank you. Mike
Wow! that was great. I have never seen that technique for ball turning.
This old Tony has done it sometimes ago
That is a great idea for turning a sphere. Thank You.
Another great demonstration. Thanks.
Awesome! Thanks for sharing this technique.
Great video. Learned a lot. Thanks Stefan.
Thank you for sharing this technique a very nice job well done
This was fantastic. Thank you for sharing. 👍
Very cool! Thanks for sharing!
Great tutorial, great work on finished item.
Great content Stefan, thanks for sharing
Nice one Stefan!
That’s a really cool technique. Never would have thought of that use for a boring bar. Sort of an inverse boring bar.
New subscriber from This Old Tony enjoyed your video and looking forward to getting caught up with the rest of them.
Very nicely presented great tuition thank you
such a joy to watch! thanks for sharing
Man! I hope your friend the chef makes you a nice dinner I return! Those are 4-star buttons! And some stars for the workmanship and video, too.
I can't wait to try this!
Hello Stefan, thanks for sharing the interesting ball cutting technique and equation, cool video.
Very good information and was fun to watch.
Some smart thinking there!! 😃
In the words of Sheldon Cooper (Big Bang Theory): "I'd like to do the math!" I missed Lipton's version of this - so, was glad for your presentation. You did a great job of demonstrating this ingeniously simple solution! That's 1 less tool I need for my lathe.
Very awesome. Been waiting on this one. 👍
Great video! 5-6 minutes per part was much faster than I thought. :)
Very timely video for me, having recently had poor experience turning something similar (actually a toggle knob for a pressure switch) using a form tool on the lathe. I'll try it using my spin indexer on the mill tomorrow! My boring head screws onto the shank, so I'm guessing I'll need to grind a bar with the opposite geometry so I can run the mill forwards🤔
Also on my to do list is looking out for Tom Lipton's book👍
Stefan, Essen ist gut! Definitely take care of the chef. Your point about precision adequate for the job at hand applies to many things besides machining.
Love your videos! Great stuff!
Ooh, ooh, I've done this! I used my spin indexer to create a couple of finials in African Blackwood. After I created the spheres I indexed them 24 times & plunged the tool 0.2mm to create a lovely ornamental turning pineappley pattern.
Great idea! This could be a faux-knurl for a handle application too.
The math there was a bit off: the hypotenuse is touching the ball in the free end, but not on the shank end. You used the ball diameter on the long leg, but I think it should have been used on the hypotenuse. Not that it would've made any notable difference (you got 11.1363 for the angle using the diameter for the long leg, I got 11.5925 using it for the hypotenuse), just for the sake of precision which is something I love in your approach to everything.
Lovely that Stefan thankyou
Inspirational Stefan!!!
I'm always fascinated by your #1s that look like lambda. Λwesome video, Stefan.
Clever! Cheers from Italy!
The inverse of me milling spherical bowls with the tilted facemill. :-) Stunt milling is always interesting and fun to see.
"Stunt milling" LOL :)
I foresee a new video segment Brian: Stunt Milling Saturdays! Would need some wide shots of you in bike gear and a crash helmet winding the mill table handles like a lunatic :)
Stunt milling = HEMI. I like it!
Eyeballs it to 15 micron. Gives it a look like, still not too bad. love your show stefan
Very cool, Stefan 😎. Really wanna get me a little rotary table for my milling attachment now lol. Thanks for the tri... tr.... math lesson too 🤣. Cheers!
Great video. I really enjoyed this.
Superb work as always, thanks for the math explanation, I'm currently trying to relearn trig !
I needed to relearn some High School maths at university. It was multinomials. I found a copy of my high school text and found it easy to relearn the material in the same way I had originally come to it. Just an idea :)
The Wohlhaupter, makes this approach golden. Sure you could get there with a standard BB holder, but 100 x more fiddling.
That was amazing, thanks.
Nicely done! .
Can I ask why you went for aluminium, not stainless or titanium?
Aluminium usually rubs off black when not sealed. On a white chef’s vest....
Anodising also helps.
Thanks mate 👍
Thanks for the video.
I am amazed that your work and ingenuity nice video
thank you for sharing your beautiful knowledge Cheers
Loved it!!!
great lesson thank you
Have you done any work on your Tormach? I remember you getting it, but I don't recall seeing it in a video. (I know we don't see everything you do in your shop.)
I guess it's kinda randomly asking but does anyone know a good site to watch newly released series online ?
@Zahir Eduardo Flixportal :D
@Luciano Kendall Thanks, I signed up and it seems like a nice service =) I really appreciate it !
@Zahir Eduardo no problem =)
That's a beautiful method. Bravo Tom and Bravo Stefan. The result is very impressive. I think you could also use a similar method to turn a ball shape in the centre of a length of round bar, with a cylinder coming out each side. Just need to work out your trig (if the cylinder diameters are different), with the difference between the two radii. This method would make for the nice old style three-ball handles on older machinery.
For a really accurate result, I think you need to calculate a new, smaller cutting diameter. Increase the shank size to almost the sphere size to visualise the need for this smaller swept circle. For me, I would just sneak up on the right measurement using a mic, and small adjustments to the boring head. I am lazy! :)
These videos are great
Carbide radius tool with the Dremel. Wonderful.
If they used this in math class as a real world example, I probably would've paid attention! This is using a lot of basic trigonometric principles. GENIUS! Grüße aus Belgien...
I did enjoy watching that! neat
Great video. Now I just need a reason to mill a ball, to give this a try. Last time I needed something like this I used a CNC mill with the stock in the spindle and a tool in the vise. Not as elegant as your setup.
awesome. I have been waiting for your next video
This is very cool!
Thanks very much very nice buttons. what media do you use in your tumbler?
Hi Stefan just to say how much i enjoy watching your videos you set attention to detail to another level, my evenings often consist of me, my laptop with head phones in.With all that is going on in the world at the moment i have found time to check out some of your older video's and have been watching your miniature colt 1911 project from about 5 years ago, which i think consists of about 10 videos that i watched back to back yesterday.I was wondering if you finished the gun as i could not find the whole project on your channel.once again thanks for uploading i learn so much just watching. Kevin