This is the 15 minute long vid on "HOW A 3-jaw lathe chuck works". If you want shorter, watch #26a the 3 min. long version. Subscribe & like, not hate. Watch all 880 of my shop videos.
As commented in #26a I think these cutaway videos are a great way to teach. I have been building hands-on interactive exhibits for a museum for a number of years. Quite some time ago I tried to get an industrial supplier to give me some of the cutaway counter displays of things like bearings and right angle drives they were discarding so that I could make exhibits out of them. I was told that they had to scrap them because of liability concerns. I hope you do not scrap any of your cutaways!
Hey thanks for taking the time to do this. I appreciate you dedicating a chuck for the purposes of teaching. This really helped me understand how these things work. I've seen 3D animations of these but I still didn't really get a good understanding. This definitely gave me a really good understanding. Thanks again
In all sincerity..... this was such a great video!! The cutaways were awesome too. Some people may say “blah blah blah... don’t need to cut a chuck up to explain it...”. I say cut more stuff up!! If someone watched this video one time, they could fully understand the scroll chuck. Instead of trying to explain the theory 2 or 3 times. Good job MrPete!!
Very nice cutaway and demonstration! Thanks. I had to study and figure out the numbered jaws in the correct slots when I got my antique lathe. They were in the wrong slots and the chuck was horribly useless with one jaw about 1/8 inch further out than the other. :)
Lyle, I hadn't looked at this video earlier, as I am familiar with how a 3 jaw chuck works. Had to pull them apart to clean over the years. Really good description as to how they work and also the process of making the cut-away. The only sad part to me, is that the chuck looked so much better the the one I have on my little Rexman lathe at home.
Lyle, thanks for your reply. Here in Australia, there is not much of that around at all. Most of the smaller lathes that would use something of that size, would have been in tool rooms, schools or technical collages. When sold, most would have been snapped up by hobbyists or ex tradesman and may still exist. Although Australia is a big country, most people live around the coastal areas, with minor settlement inland on the eastern coastline. In the centre, there is almost no settlement at all, just desert. Current population is in the region of 22,000,000. Hope this is not too much information.
When you have time, look up Australia in Google Maps and have a wander around. I live in Adelaide, South Australia, down at the bottom. If you use the satellite mode, you will see the empty spaces in the middle and the greener areas around the edge. It is an interesting place.
Mr Pete, I wish you would have shown the differences between the arrangement,of the teeth on each of the jaws! Otherwise, great video on how these chucks work internally.
I've seen high end shops make scroll chucks (not too difficult with a good cnc mill), the only thing I don't understand/haven't seen is the formula/calculation for cutting individual jaws based on scroll scroll position/index. Have to take into account diameter of scroll, pitch, "tpi", number of chucks, etc. and machine them accordingly based on location
@@mrpete222 do you think they could just have, roll forged the followers in the master jaws with a scroll designed for forging, and adjusted in size for the heat involved ? I bet the Chinese have tried that.
Thank you for making a very informative video, I’m amazed at the simplicity in the design. I did cringe a bit when you milled out the cutaway sections of the tool though. I hope it wasn’t usable anymore before you that,
I know that this is an old video but how would a scroll be made before CNC? I can’t find anything online, I assume it would have to be done with something similar to thread cutting on a lathe but using something to transfer power the cross slide?
Great video, AvE recommended your channel and I'm glad I took a look! Also, I have a question about that scroll plate, particularly about how the scroll was manufactured, if you have any idea (or anybody else reading this comment)
Thank you for this. Opening the scroll thread makes it clear why the jaws must be put back in the specific order. What does it take to cut a scroll thread? Also: Are the three jaws cut differently, or are they shaped later?
On some lathes it's possible to cut the scroll thread using the crossslide under power. The relationship between the thread teeth on the back of each jaw and the gripping surfaces on the front of each jaw are slightly offset on each jaw. that's why they must be used in matched sets and in the correct position in the chuck. They never line up correctly any other way. A side note; a quick and dirty way to lathe an offset lobe on a shaft in the lathe is to install the 2 chuck jaws in the wrong positions and the work will be held off center.
I dont think that any machinist need to destroy a chuck to see how in works. And i dont think that anyone how doesent understand how it work are ”playing” whit a lathe
Very cool video! This reminds me of when I got my very first lathe as a beginner home shop machinist and was curious as to how the scroll chuck worked. Boy was I nervous taking it apart thinking their might be springs and parts shooting out when I removed the rear cover! Thank you for sacrificing a chuck! You have got some great ideas and always look forward to your videos!
Hey my friend what's up,I have a delta iron bed 1440 lathe and a shop fox mini lathe and I need a chuck for both lathes but I don't know which one to buy It's my 1st time buying lathes :)
TJ'S WOODWORKING SHOP the 4 jaw is slower to set up but much more versatile than a scroll chuck. If I only could have 1 chuck it'd be a 4 jaw. be aware that they're sometimes tedious to set up but you have many more set up options and can achieve zero run out with numerous set ups.
Hi Pete, just a little trivia for the day. The Burnerd self centering chuck, in its many forms to suit many different makes of lathes, was manufactured for production lines, where repeated operations could be carried out relatively quickly, when the accuracy was tied down to 2 or 3 thou. They were produced in Winchester, Hampshire, UK on war issue lathes and other machines of a similar date and then exported all over the world. Some types had micro adjusting cams in the back plate to give total accuracy. Burnerds was taken over by Pratt Woodworth in the late sixties in order to produce Diaphragm Chucks that were exported to Italy to go on Italian auto lathes that in turn were exported to the USSR. I believe that the components to be machined were malleable cast iron wheel blanks for the Russian Army trucks!! Four jaw chucks of the same make (Burnerds) were made for jobbing shops around the world with a range of 3'' to 18'' dia. Burnerds also produced collet chucks for bar autos and similar fast production lines, they also produced watch makers chucks with extreme accuracy for the Swiss watch industry. Burnerds employed between 200 and 300 production staff at it's height of manufacturing and machined cast iron blanks and bar to a completed product including all the heat treatment. Thanks for your effort on all the engineering videos, I appreciate them. Best Regards, Pete C
+pete Cooper thanks Pete, I love industrial history. And that's quite a story. All the closing ladies came with Bernard Chuck's. I know I spelled that wrong, but IM dictating this.that firm has quite a worldwide reputation. Thank you
ARE YOU SAYING, they where produced, in lathes, or, (obviously) put into production on lathes. Cause I would like to know how the he'll to make an without CNC, and grinding machines for them too, or even ball grinding scrolls
I have been watching all of your "What makes it work" videos. No doubt the best instructional videos anywhere. Watching the scroll move before meeting the threads of chuck is the first time ever I saw that back lash I heard of so often and, I suspect, a you tube exclusive. Thanks again ever so much.
Good video! I have a 3 jaw chuck that you can reverse the jaws on but 2 of the jaws have to be installed in different slots in order for the sequencing to work out.
This is a perfect video for a machine shop school explaining how a chuck works.
Thanks for watching
This is one of the BEST teaching tools I've seen!!!!
By one of the best teachers ever!
Thanks for watching
That makes a very neat teaching aid. There is something hypnotic about watching the scroll work.
Thanks for watching.
Our UA-cam Shop Teacher has returned. Thank you for a very informative video.
You are an excellent presenter and teacher. Thank you.
Thank you very much
Thanks for your time on making this very informative video. I was curious as to how the chuck works. Clear and very easy to follow.
Excellent Mr. Pete! Truly a piece of machine eye candy.
Thanks for watching
Thank you for taking the time to share with us. Great video.
Thanks for watching
Always wondered how scroll chucks worked. Thank you for sharing you time and knowledge!! 🙏🏼
Thank you Mr Pete, I wish I had a shop teacher like you when I was in school.
As commented in #26a I think these cutaway videos are a great way to teach. I have been building hands-on interactive exhibits for a museum for a number of years. Quite some time ago I tried to get an industrial supplier to give me some of the cutaway counter displays of things like bearings and right angle drives they were discarding so that I could make exhibits out of them. I was told that they had to scrap them because of liability concerns. I hope you do not scrap any of your cutaways!
I love cutaways---they would rather trash them than give them away
Hey thanks for taking the time to do this. I appreciate you dedicating a chuck for the purposes of teaching. This really helped me understand how these things work. I've seen 3D animations of these but I still didn't really get a good understanding. This definitely gave me a really good understanding. Thanks again
Bless you for your cutaways! They add sooo much understanding!
Thanks for watching
A perfect explanation for how chucks work. thank you.
👍
Excellent mrpete Thanks for sharing. Interesting to see inside the chuck. regards from the UK
Thanks for watching
Great Video!!! The cut-a-way chuck shows it all!!! Thanks for sharing!!!
👍
In all sincerity..... this was such a great video!! The cutaways were awesome too. Some people may say “blah blah blah... don’t need to cut a chuck up to explain it...”. I say cut more stuff up!! If someone watched this video one time, they could fully understand the scroll chuck. Instead of trying to explain the theory 2 or 3 times.
Good job MrPete!!
Thanks
Love your videos! You are America's shop professor.
RIP, Mr Chuck. You were sacrificed for a noble cause.
yes-Thanks for watching
EXCELLENT DEMONSTATION. THANK YOU SO MUCH
Thanks
Great job love the cutaways...
Great video as usual.
Thanks for sharing! One of the best demos out here. We appreciate it, Sir.
Thanks
Very educational video, I liked the way you broke it down into great detail. Now I know how it works. Thanks alot.
Excellent as always Mr. Pete! You make the best cutaways and the best videos!
Thanks for watching.
This is one of the best demonstration videos ever posted on UA-cam.
Thanks--but very few views
@@mrpete222 well that changed for the better lol
Always a great job teaching. Thanks!
Excellent vidio Mr Pete
Thanks for watching
never seen this.i know how it worked.but never sower it cut away. very good.
Thanks for watching
i love watching you .you are so clear when you speak. thank so much ps all my friends love to watch too. keep up the good work. sam.s repair serv. sal
Thank you very much
Very nice cutaway and demonstration! Thanks.
I had to study and figure out the numbered jaws in the correct slots when I got my antique lathe. They were in the wrong slots and the chuck was horribly useless with one jaw about 1/8 inch further out than the other. :)
LOL
Thanks for the video. I'm really interested in how the scroll is machined.
Wow, nice work
Terrific Demo Video - Thanks for sharing!
Thanks for watching
THANK YOU...for sharing.
Lyle, I hadn't looked at this video earlier, as I am familiar with how a 3 jaw chuck works. Had to pull them apart to clean over the years. Really good description as to how they work and also the process of making the cut-away. The only sad part to me, is that the chuck looked so much better the the one I have on my little Rexman lathe at home.
Those old chucks are dime a dozen
Lyle, thanks for your reply. Here in Australia, there is not much of that around at all. Most of the smaller lathes that would use something of that size, would have been in tool rooms, schools or technical collages. When sold, most would have been snapped up by hobbyists or ex tradesman and may still exist. Although Australia is a big country, most people live around the coastal areas, with minor settlement inland on the eastern coastline. In the centre, there is almost no settlement at all, just desert. Current population is in the region of 22,000,000. Hope this is not too much information.
I have seen vids where those huge trucks go thru the desert
When you have time, look up Australia in Google Maps and have a wander around. I live in Adelaide, South Australia, down at the bottom. If you use the satellite mode, you will see the empty spaces in the middle and the greener areas around the edge. It is an interesting place.
Mr Pete, I wish you would have shown the differences between the arrangement,of the teeth on each of the jaws! Otherwise, great video on how these chucks work internally.
What a great video! Thanks sir👍🏼
Thanks
I really worked hard on that video and was disappointed with the small number of views
mrpete222 totally agree
Thank you so much for this you satisfied my curiosity🙏 and thankyou for the sacrifice 😁
They are not Pratt Bernard and thankfully they are still made in England! 🇬🇧 great video
Thanks for watching
Just have to make a plexiglass front and back plates for the 3 jaw and it's back form the dead and it would be cool to see one like that.
Thanks for watching.
I've seen high end shops make scroll chucks (not too difficult with a good cnc mill), the only thing I don't understand/haven't seen is the formula/calculation for cutting individual jaws based on scroll scroll position/index. Have to take into account diameter of scroll, pitch, "tpi", number of chucks, etc. and machine them accordingly based on location
Yes, that would be a difficult calculation
@@mrpete222 do you think they could just have, roll forged the followers in the master jaws with a scroll designed for forging, and adjusted in size for the heat involved ? I bet the Chinese have tried that.
Thank you for making a very informative video, I’m amazed at the simplicity in the design. I did cringe a bit when you milled out the cutaway sections of the tool though. I hope it wasn’t usable anymore before you that,
How could you make the scrolls and the I guess, involute Loabs? Without CNC? Maybe you can do it on a geared lathe with face grooving tools?😊
A portion of this video would be perfect for demonstrating backlash to someone who struggles with the concept.
Why no oil when milling the part? Is it because the part is just for demonstration?
Mr Pete I just got one but has thread2 inch but need 1 half
Thanks great video learned a lot
Thanks for watching.
I know that this is an old video but how would a scroll be made before CNC? I can’t find anything online, I assume it would have to be done with something similar to thread cutting on a lathe but using something to transfer power the cross slide?
Great video, AvE recommended your channel and I'm glad I took a look!
Also, I have a question about that scroll plate, particularly about how the scroll was manufactured, if you have any idea (or anybody else reading this comment)
Thanks for watching. Never seen how they are made
es ist fantastisch!
Thank you for this. Opening the scroll thread makes it clear why the jaws must be put back in the specific order.
What does it take to cut a scroll thread?
Also: Are the three jaws cut differently, or are they shaped later?
On some lathes it's possible to cut the scroll thread using the crossslide under power.
The relationship between the thread teeth on the back of each jaw and the gripping surfaces on the front of each jaw are slightly offset on each jaw. that's why they must be used in matched sets and in the correct position in the chuck. They never line up correctly any other way.
A side note; a quick and dirty way to lathe an offset lobe on a shaft in the lathe is to install the 2 chuck jaws in the wrong positions and the work will be held off center.
Thanks thanks!!! Great video!! Do you have chuck construction plans ??
How does spindle connects with this chuck please guide as there is no thread or keys are visible.
Thread
@@mrpete222 Thank you sir
Favorable comment!
how long did it take to do all the cutterways... Thanks for sharing sir enjoyed that very much.....
all day-Thanks for watching.
mrpete, what kind of music do you like? cant wait for the next one!
Vegan Adventure his teaching ( talking) is music to the ears.
Thanks for watching
Screw skeleton watches, I'm strapping a skeleton chuck to my wrist!
LOL
I dont think that any machinist need to destroy a chuck to see how in works. And i dont think that anyone how doesent understand how it work are ”playing” whit a lathe
9:50
Hello world.
Great video ! I like the " Verbose" version. :)
I didn't even bother with the short one. I'd rather hear Mr. Pete wax eloquently.
As do I!
steve
Thanks for watching
It's a small masterpiece of mechanical cutaway demonstration.
Thanks for watching
Thanks Mr. Pete. This is an excellent video. I never took shop class in high school. I wish i had, and i wish you were the teacher.
Thanks for watching
Such a great communicator/teacher! Thank You sir :)
I really appreciate all the knowledge you share! It’s helped get me into machining as a hobby and I enjoy all the information 🤗
Thanks
Excellent video. It's really interesting to see how the chuck works, and having the chuck cut away as you did makes it much easier to understand!
Thank you! Thank you! Thank you!! I always wondered how these things work.
Wonderful Video. Regards, Engineer from India.
Very cool video! This reminds me of when I got my very first lathe as a beginner home shop machinist and was curious as to how the scroll chuck worked. Boy was I nervous taking it apart thinking their might be springs and parts shooting out when I removed the rear cover!
Thank you for sacrificing a chuck! You have got some great ideas and always look forward to your videos!
Thanks for watching
Hey my friend what's up,I have a delta iron bed 1440 lathe and a shop fox mini lathe and I need a chuck for both lathes but I don't know which one to buy It's my 1st time buying lathes :)
buy a 3 & 4 jaw chuck for each lathe
I DON'T GET IT MY FRIEND WHAT'S A 3 & 4 JAW CHUCK MY FRIEND?
TJ'S WOODWORKING SHOP the 4 jaw is slower to set up but much more versatile than a scroll chuck. If I only could have 1 chuck it'd be a 4 jaw. be aware that they're sometimes tedious to set up but you have many more set up options and can achieve zero run out with numerous set ups.
Thanks I learned something.
Great explanation as usual. You must have been a great, in person, shop teacher!!!
Thanks
Nice chuck cut away. Most of us don't have the luxury of doing that.
Thanks for watching.
great video Thanks Mr.Pete
Thanks for watching
Thanks, very interesting
Excellent and informative
Presentation well. Well done indeed.
"...unless you're Abom 79..."
What, no Keith Fenner?
I wonder which one wins the
shoot-out this year?
steve
thats soo kool . i love the things u do in your vids thanks peate
Thanks for watching
Hi Pete, just a little trivia for the day.
The Burnerd self centering chuck, in its many forms to suit many different makes of lathes, was manufactured for production lines, where repeated operations could be carried out relatively quickly, when the accuracy was tied down to 2 or 3 thou. They were produced in Winchester, Hampshire, UK on war issue lathes and other machines of a similar date and then exported all over the world. Some types had micro adjusting cams in the back plate to give total accuracy.
Burnerds was taken over by Pratt Woodworth in the late sixties in order to produce Diaphragm Chucks that were exported to Italy to go on Italian auto lathes that in turn were exported to the USSR. I believe that the components to be machined were malleable cast iron wheel blanks for the Russian Army trucks!!
Four jaw chucks of the same make (Burnerds) were made for jobbing shops around the world with a range of 3'' to 18'' dia.
Burnerds also produced collet chucks for bar autos and similar fast production lines, they also produced watch makers chucks with extreme accuracy for the Swiss watch industry.
Burnerds employed between 200 and 300 production staff at it's height of manufacturing and machined cast iron blanks and bar to a completed product including all the heat treatment.
Thanks for your effort on all the engineering videos, I appreciate them.
Best Regards, Pete C
+pete Cooper thanks Pete, I love industrial history. And that's quite a story. All the closing ladies came with Bernard Chuck's. I know I spelled that wrong, but IM dictating this.that firm has quite a worldwide reputation. Thank you
ARE YOU SAYING, they where produced, in lathes, or, (obviously) put into production on lathes. Cause I would like to know how the he'll to make an without CNC, and grinding machines for them too, or even ball grinding scrolls
How the heck did they make the micro adjusting cams, that's awesome....!!!🤓
I have been watching all of your "What makes it work" videos. No doubt the best instructional videos anywhere. Watching the scroll move before meeting the threads of chuck is the first time ever I saw that back lash I heard of so often and, I suspect, a you tube exclusive. Thanks again ever so much.
You are amazing sir. You have produced and immensely engaging and educating video. Thank you for your time and effort.
Thank you very much
thank you Mr Pete
Awesome video!
would hav
great lighting on the hands at the bandsaw -- love it!!
Good video! I have a 3 jaw chuck that you can reverse the jaws on but 2 of the jaws have to be installed in different slots in order for the sequencing to work out.
Thanks for watching.
great job Mr Pete! The comment on the maintenance and chip removal was perfect for a newbie like me... Great video!!!
Thanks for watching.
Those cutaways were brilliant! Thanks for going to the trouble.
Thanks
Great video, very informative.
You're a very good mentor / instructor , Thumbs up Lyle
The best!