6jaw Chuck for toolgrinding - Teardown, modification and boring
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- Опубликовано: 14 дек 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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Gotteswintering chinesium are my favorite videos
I agree!
Making a 100 dollar chuck a 1000 dollar chuck without summoning a demon .😎👍 Thanks Stefan.
Thanks for taking the time to do these videos.
I always enjoy the teardown videos. Informative and adds to my "what to inspect for" repertoire. Thanks again
"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.
13:47 The sound of German precision :-)
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!
YES ! 6jaw modification filmed under new lighting. Stefan, you sure know how to throw a Christmas Special !
Thanks !
Thanks for the video Stephan.
Excellent - I learn something from all your videos, thanks.
Nicely done! I always enjoy the tool upgrades.
Nice work Stefan! You will find that very useful.
ATB, Robin
great discussion/demonstration....Happy Holidays
Thanks for teaching us the process, I'll use it on mine. Danka!
Thank you for posting
Love these videos, so much to learn.
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.
Nice job on the upgraded chuck. Thanks Stefan. Merry Christmas.
Another great video 👍. Thanks Stefan.
Excellent content. Thank You for explaining the process.. Best Wishes to You and Yours for the Holidays...
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 😎🇦🇺🦘
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 RUclips.
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!
Fascinating, Entertaining, Educational, as always. Thanks you Stefan....
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!
thx steff, give a lot of good ideas to my small toys...
As always, informative, interesting, and inspiring me to do better.
Hi Stephan, interesting video thanks for showing.
Top job Stefan.
Al.
I like your new audio, very clear.
Very very neat!
I enjoy your videos and I really wish ROB would make more videos he is one smart human.
Hi Stefan, Hope You & your family have a Happy & Prosperous New Year
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
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!
GOOD TO SEE YOU BACK. LOOKING TO MORE. REGARDS RICHARD . IN U.K.
A whole lot of great tips and tricks. A+. Happy Holidays, you made mine better.
Very informative, thank you for the great video.
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!
Thank you for another great video!
I always learn something from your presentations. Thank you for sharing. 👍🛠🇦🇺🔭
I'm no machinist. but I find all of your videos fascinating. Thanks for sharing.
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.
love your channel Stefan. High precision at a reasonable price, without the need to summon any demons
TOT and Stefan uploading on the same day? Nice!
Wesley Grace, they’re in the same time warp!
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!
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 😁.
Tolles Video! Immer eine Freude wenn man sieht das es ein neues Video von dir gibt! Wieder hoch interessant :-) Gruß Robin
How did the lathe handle that amount of over hang while holding the second chuck? Great video Stefan, always a joy to watch!
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!
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
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
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.
Excellent.👊🏻 I hope you’ll show making the set thru adjustment feature on this chuck.👌 Merry Christmas from NC.🎄😁
Very Interesting, thanks for sharing 👌👌👌
I so enjoy your videos. I wish I would have been a machinist :-)
Good job
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!!!
And as an added extra, you can now use those pins to (lightly) clamp small things when extra chuck clearance is needed.
I'm pretty sure that I could watch your videos for 24 hours strait and still want more.
great video I hope you show the process of making the adjust feature and 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
:-) Nice job! Frohe Weihnachten.
Just here to wish you a very good 2020. Cheers !
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!
Must do a video on the set Tru backing plate please please please thank you Stefan
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...
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.
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 it would be interesting to show your adjustable back plate in a future ShopTalk.
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.
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...
You failed miserably... this wasn't boring at all!
Döner + Gotteswinter = Backenfutter für die Seele 👍👍jetzt kann ich beruhigt schlafen da ich weiß das niemand geopfert werden muss
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!
cool!
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.
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.
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.
I have many co workers who could be sacrificed at night, it would probably improve the company
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
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.
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.
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.
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.
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
LOVELY video... very nice work... Oh... and no demons were harmed during the making of this video... LOL :)
nice.
if you want to hold slightly smaller items you can take out three of the jaws, but........
would using machine oil for the holes for the dowel pins have made the holes a bit larger?
you using 21.51 inserts? Nice chuck!
Reading the description “Tear down, modification, and boring”. Hmm I bet it’d actually be fairly interesting 🤦♂️
Your DRO had some kinda neato feature to work around a circle in 6 points I assume? I have an old heidenhain, perhaps from the 1970s, no real features aside from showing axis values.
Yes, I was wondering the same thing. He kind of just magically found the points for the dowel holes
"Bolt circle function"
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.
What if you cut external jaws looks like plenty of material on them may be one or two sets
Engineering at its best.
Ich hab mir von der selben Marke ein Vier-Backen Futter (unabhängig) zugelegt. Ich war ziemlich enttäuscht: Nach innen hin fällt es insgesamt ab, sowohl auf der Oberfläche als auch in den Fräsungen die die Backen halten. So stehen die Backen zur Achse leicht schief. Also vorn an der Spite packt es schon, hinten ist noch Luft... Dann sind alle Führungen auch noch unterschiedlich gefertigt. Ich war so irre alle Backen raus zu nehmen und konnte dann je Stunde puzzeln um die richtige Reihenfolge wieder zu finden. Aber dann sind die Backen immer noch alle leicht unterschiedlich hoch.
Ich hatte noch keine Lust das neu zu schleifen...
But what if I WANT to sacrifice someone to the machining demons?
Mike Michelizzi but WHO???
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?
"Summon a demon" ha, good one.
Cheers
Don't underestimate having a demon on speedsummon, they are a real time saver!