6jaw Chuck for toolgrinding - Teardown, modification and boring
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- čas přidán 14. 12. 2019
- Getting an inexpensive 6jaw chuck ready for operation.
Robin Renzetti showed the process of boring a very similar chuck on Instagram, I took that as an inspiration to do it very similar. Thanks Robin!
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#practitioner_of_the_mechanical_arts - Věda a technologie
Making a 100 dollar chuck a 1000 dollar chuck without summoning a demon .😎👍 Thanks Stefan.
Gotteswintering chinesium are my favorite videos
I agree!
Dear Father Christmas,
Please enthuse Stefan to make some more videos in the next four days, I would like at least 2hrs of something to watch for my present on Christmas day and more of this sort of thing would be ideal.
Oh and please get Stefan whatever he has asked for as he has created a ton of good material this year! Well unless its some kind of ultimate CNC mega-machine which might reduce his need to manually machine things, don't get him one of them, not allowed.
Thanks,
Danny
"Could you imagine I do not have a 3mm carbide drill in the house?" Actually, no I can't. It wouldn't surprise me if you had 2.9mm and 3.1mm drills as well! ;-)
Thanks for another enlightening video.
I always enjoy the teardown videos. Informative and adds to my "what to inspect for" repertoire. Thanks again
Thanks for taking the time to do these videos.
I have maybe 150 gear cutters. Only 3 or 4 need sharpening. I did not know how to do it. This was extremely helpful to me. Thank you!
13:47 The sound of German precision :-)
Nice work Stefan! You will find that very useful.
ATB, Robin
Döner + Gotteswinter = Backenfutter für die Seele 👍👍jetzt kann ich beruhigt schlafen da ich weiß das niemand geopfert werden muss
YES ! 6jaw modification filmed under new lighting. Stefan, you sure know how to throw a Christmas Special !
Thanks !
TOT and Stefan uploading on the same day? Nice!
Wesley Grace, they’re in the same time warp!
Nicely done! I always enjoy the tool upgrades.
Really enjoyed this one. It's always better not to sacrifice anyone at midnight in the pursuit of accuracy until the Spring. Thanks so much and have a very happy holiday season. I hope that you have time to relax and consider the enjoyment that you have brought to so many.
I myself preffer to summon demons, but I guess that to each their own. Thanks for taking the time and allowing us to tag along, I alway pick a ton of tips and learn a lot from your videos, I really appreciate it!
thx steff, give a lot of good ideas to my small toys...
I'm pretty sure that I could watch your videos for 24 hours strait and still want more.
Nice job on the upgraded chuck. Thanks Stefan. Merry Christmas.
Love these videos, so much to learn.
Another great video 👍. Thanks Stefan.
Thanks for the video Stephan.
Very very neat!
Very informative, thank you for the great video.
Thank you for posting
As always, informative, interesting, and inspiring me to do better.
That indicol you used looks like it was handmade in your shop because it looks solid. Not at all like the ones you can buy now. Fascinating work as always and thank you for sharing with us Stefan!
I half expected you to go back and regrind the jaws so they close up on a smaller diameter
Great work on this. I might have to fix up my chucks now I've seen this
Thanks for teaching us the process, I'll use it on mine. Danka!
Excellent - I learn something from all your videos, thanks.
Excellent content. Thank You for explaining the process.. Best Wishes to You and Yours for the Holidays...
I'm no machinist. but I find all of your videos fascinating. Thanks for sharing.
Thank you for another great video!
Great video Stefan, always enjoy watching your videos. Thanks for sharing and I appreciate the effort and time that goes into making these videos. Cheers Rick 😎🇦🇺🦘
Stefan, thank you for yet another educational and interesting video. I learned a lot from this video and plan to use many of these techniques on my own chucks, plus any that I purchase in the future.
I always learn something from your presentations. Thank you for sharing. 👍🛠🇦🇺🔭
I like your new audio, very clear.
A very well done video about a kind of dry subject. I totally agree with you about using a 6 jaw for quick part acquisition with close to zero total indicator runout. Which on small part is critical. I can tell you from experience that using a turned ring midway on the tapered jaws a much better way when real dead-nut zero runout accuracy is supreme. When holding a chuck in a chuck extended so far out from the support of the headstock bearings vibration will be your enemy of accuracy. Holding using a fixtured fitment in back of six jaw chuck will really make for a ultra chuck. Nice job and do not stop with this presentation. Keep on machining and present us with other great topics.
great discussion/demonstration....Happy Holidays
GOOD TO SEE YOU BACK. LOOKING TO MORE. REGARDS RICHARD . IN U.K.
Fascinating, Entertaining, Educational, as always. Thanks you Stefan....
Hi Stefan, Hope You & your family have a Happy & Prosperous New Year
Hi Stephan, interesting video thanks for showing.
A whole lot of great tips and tricks. A+. Happy Holidays, you made mine better.
Amazing Stephan, as usual.
I had only just bought a European set tru 6 jaw 125mm chuck 2nd hand last week.
I will now have to check it over....
Thank you Stephan!
Thanks Stefan, Robin is such a great source of inspiration and it's nice to see you translating that across so it's accessible on CZcams.
I enjoy your videos and I really wish ROB would make more videos he is one smart human.
love your channel Stefan. High precision at a reasonable price, without the need to summon any demons
Top job Stefan.
Al.
Tolles Video! Immer eine Freude wenn man sieht das es ein neues Video von dir gibt! Wieder hoch interessant :-) Gruß Robin
Thanks for the pin method, I really like your improvement approaches, I shudder to think of what you normally call close, as compared to my own shop practice. Cheers Stefan, I enjoyed the video wery much!
I hope that this is a lead in to how to make an adjustable backplate to fit multiple machines! I can’t wait, thanks Stefan!
Stefan it would be interesting to show your adjustable back plate in a future ShopTalk.
Very Interesting, thanks for sharing 👌👌👌
Robin Renzetti this, Robin Renzetti that
Robin with his unique approach is very influential to me. Whats the problem?
@@StefanGotteswinter The guy is truly fascinating, isnt it?
I so enjoy your videos. I wish I would have been a machinist :-)
Good job
I have two SanOu chucks both with 6350 so i had to make two backplates for the D1 4 spindle of my lathe ..this was a nice project...f....ck -- the first four !!!! plates had runouts with the chuck from 0,2 to 0,6 !!!! First I thought the SanOu chucks are the reason but then I tried to work as precise as possible and there came out one chuck with 0,02 and one with 0,015...okay six backplates to get two good ones is weak but the chucks are not bad if you do it like stefan, clean and go over it and then you have real workable chucks for fair money...
Stefan , i enjoy your work , because its good to revel in upgrading a machine. even vicariously! if it aint worth "overdoing" why do it al all? MERRY CHRISTMAS
G’day Stefan. Ah the good old days of sacrificing a virgin, sadly no more:)
Thanks for the tip this is something I need to do on the Gingery 4 jaw chuck I just built, good timing.
Cheers
Peter
Instead of drilling holes on the jaws which is you could while still on the lathe, bore a small recess on the face of the jaws that can also grip short and thin parts like washer or bearing races while providing a parallel backing. You can then grip from that and bore the rest.
Excellent.👊🏻 I hope you’ll show making the set thru adjustment feature on this chuck.👌 Merry Christmas from NC.🎄😁
:-) Nice job! Frohe Weihnachten.
great video I hope you show the process of making the adjust feature and merry christmas
Very curious about this adjust true flange you spoke of 🙂. I recently ground my old 3jaw, I thinks it's probably like 80 years old 😊. Got all of the bell mouth out of it but with the wear in the jaws still has different run out on different sizes of stock. So that might be a cheap alternative to buying a new chuck. Thanks for the share 😁.
I heard your like Chuck's. So here's a chuck with a chucked chuck.
I'm actually doing this same thing to a 6 jaw I got the other day. Love the pin trick - definitely using that!
Just here to wish you a very good 2020. Cheers !
Only one minor aspect. I think you possibly might have used a narrow ring, perhaps a button of nylon outer to preload your jaws equally before drilling. Would have ensured the jaws were preloaded against the keys in the body. Still very impressive. I was doing a quick job one day. Had to part off some 8 mm stainless rod. I had a big 3 jaw chuck on and simply threw up my 125mm chuck that I had a decent ring bolted on to the back as I used it for holding gears to finish bore and just adjust in my four jaw chuck. Was running at about 820 rpm and parted off the first part fine. Second cut it went wrong. Ripped the chuck out and it flew between my body and deflected off my forearm. and spun across the workshop and stopped spinning when it got to the wall. I had a huge bruise on my arm, I actually thought I had broken it. I was lucky because the 8 mm rod sticking out about 30 mm missed me and the jaws were just inside the main body so didn't catch on anything.
Thanks Stefan, I want to cast another vote for a video on your set/adjus-tru design and build!
0.01mm runout is pretty darn good, especially for the weight without tailstock or lathedog support you put on your spindle there. that is quite a stickout, that is like 1/2 a thou right there good work!!!
If you have adjust true on your six jaws, technically you do own four jaw chucks ;-) I do a lot of small parts as well. I use six jaw chucks and collets for 90%+ of what I do. Great video. Thanks!
How did the lathe handle that amount of over hang while holding the second chuck? Great video Stefan, always a joy to watch!
cool!
Must do a video on the set Tru backing plate please please please thank you Stefan
And as an added extra, you can now use those pins to (lightly) clamp small things when extra chuck clearance is needed.
Cool show Stefan, hey if that key is 3/8" Its handy for driving sockets and 3/8 drive hex key's. I have one of Sanou's drill chucks and found out that if it's cheap and good you tend to use it. had it 10 or so years still bout 2-3 thou runout not a bad little drill chuck. Find like a metal funnel or somthing and make a dust gaurd or somthing to keep the grit out. God i just bought some of those cheap er 16 collets that I probly will have to super glue to a homade mandrell and tool post grind, and probly end up with more runout than that ha ha. Happy Holidays Stefan.
Another informative video you are a natural teacher. I am very interested in seeing how you go about making an adjustable mounting plate. If you don't have the time to make a whole video on it at least show us the design when finished.
Stefan, please explain next how are you going to do the adjustable set up with the back plate for this one. I can understand how the zentra 6jaw works for you as it has integrated set screws, but this one does not even seem to have space to put then in - really interested as I would like to do that for my other chucks to improve the runout.
Thanks for all - you are giving us the best machining course I can imagine!
You failed miserably... this wasn't boring at all!
I have many co workers who could be sacrificed at night, it would probably improve the company
Thank you for a video! Interesting content as always. I wonder what would be the best solution for my type work. I'm usually working in 3-10 mm diameter range with many replacements. Collet ER Chuck with a mark on collet and nut to make it repeatable? Or maybe adjustable chuck and indicator clamped near by for checking and adjusting each time? I wonder if there are small adjustable chucks out there...
I just adjust the runout on my 6 jaw with the backing plate adjustment and if I change o.d. I re adjust if I'm reclamping. But ATM the 4 jaw has been seeing alot more action but that because she is a big lathe and one of jobs is usually what she gets.
i see you did something that not even This Old Tony can do . . . you made the work transparent when you bored it . . . nice to watch a boring bar at work for a change instead of just hoping it's not messing up in therre.
You are slipping Stefan ! I was expecting that you would re grind the scroll and hand scrape every surface to within two electrons of the desired dimension😂.
Having those holes for the dowel pins could come in handy one day especially for holding thin rings or washers .
Excellent video and it gives some food for thought for those who are looking at repairing a chuck .
That's a really good point with the dowel pins. It would be useful
LOVELY video... very nice work... Oh... and no demons were harmed during the making of this video... LOL :)
"the twist will have a twist to it" genius!
Really excelent video as usual! Just one detail:
Did you consider grinding the outer sides of the jaws before you put them in the grinder to regrind them? That way you would ensure that the reference you are using is a valid reference. As they came I don't think those surfaces had any accuracy (they don't need to be accurate anyway.....). And I think you could have had the jaws meet up more precise if you had done this first. It looks like one of the jaws are close to the center, and therefore will hit the pice of tubing you have in there before the others, thus being pushed inn harder (and being bent out further than the other jaws).
Nitpicking I know, but it would make it possible to get even better accuracy this way.
was thinking the same thing as well. in our shop we always machine the outer OD of the jaws clamped with the according chuck when a set needs to be machined at the clearance angles, that way you could ensure they would clamp down pretty evenly to start with. jaws for CNC chucks and soft jaws for scroll chucks are especially bad in that regard, they tend to be off centre by almost 0.5mm in some cases.
Can you go into more detail on achieving better precision by making offerings to Dark Gods? I don't know if I have to use cold iron, or if CBN inserts will work as well.
Nice video particularly the philosophy on how to preload . How is Nick Mueller doing?
I'll chime in with a similar hope that Nick's well. We miss him over on the PM site.
Reading the description “Tear down, modification, and boring”. Hmm I bet it’d actually be fairly interesting 🤦♂️
Engineering at its best.
"Summon a demon" ha, good one.
Cheers
nice.
if you want to hold slightly smaller items you can take out three of the jaws, but........
When indicating a round part in the mill vise do you find that tongue increases the accuracy? 🤪 Another great video. Thank you.
It ABSOLUTELY increases accuracy. With my tongue out and a furrowed brow, I typically get within a tenth.
Great technique, as always. Because they were a press-fit, I thought you'd leave the six dowels in, then cut/grind them flush.
Plus your English is constantly improving. Heck, you could pass for someone from northern Wisconsin!
Ya
you using 21.51 inserts? Nice chuck!
I was a little surprised that you didn't also grind the front 15mm or so of the outside of the jaws round. You could get a tool about 4mm closer to the work that way.
Don't underestimate having a demon on speedsummon, they are a real time saver!
would using machine oil for the holes for the dowel pins have made the holes a bit larger?
What if you cut external jaws looks like plenty of material on them may be one or two sets
the jaw boring technique looks familiar. ^^
An alternative to a 6 jaw is an extended nose 5c collet. Pricey 🤑🤑🤑