Zentra six jaw chuck and backplate

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  • čas přidán 2. 06. 2018
  • More photos:
    gtwr.de/projects/pro_zentra/in...
    Web:
    gtwr.de/
    Instagram:
    / stefan_gtwr
  • Věda a technologie

Komentáře • 214

  • @CaskStrength777
    @CaskStrength777 Před 4 lety +3

    I can attest to the awesomeness of this style of chuck- I use a 3 jaw adjustable at work with a collet holding tool in the jaws. I rework aerospace gauges sometimes in the 0.00005" TIR range using this setup manually. People who say scroll chucks can't give accuracy have never used a well made adjustable runout version- like this. Nice to see someone else actually say that out loud.

  • @houseofbrokendobbsthings5537

    Glorious to see you back. Classic Stefan excellence in presentation and execution.
    _Dan_

  • @samjadaci
    @samjadaci Před 6 lety +2

    There is always something new to learn from your videos...and yes Welcome back!

  • @GarryFullerSr
    @GarryFullerSr Před 6 lety +1

    Another Great Video. I learn so much by watching your Videos. Somethings you knew years ago and forgot, others you never thought of. Thanks.

  • @kentpanter2044
    @kentpanter2044 Před 6 lety +1

    Stefan, Absolutely outstanding video. I do not own a 6 jaw chuck but now plan to get one soon. Thanks for all the great ideas. Love the music and really love the drive at the end of the video.

  • @TomChame
    @TomChame Před 6 lety +1

    Very nice to see you back. Great work, thanks.

  • @stxrynn
    @stxrynn Před 6 lety +1

    I've been battling a 6 jaw Bison for quite a while now. Thank you for giving me a couple things to look at. I really do appreciate it.

  • @MrLukealbanese
    @MrLukealbanese Před 6 lety +8

    We've been waiting, and were not disappointed!!!

  • @gertskjlstrup1804
    @gertskjlstrup1804 Před 6 lety +1

    Love it, glad to hear your still alive and kicking

  • @CNCJoeFromRomeo
    @CNCJoeFromRomeo Před 5 lety +1

    Excellent work, Stefan! I always learn something in your videos. Love the spot grinding technique...it will definitely be more accurate, too.

  • @lorenlieder9789
    @lorenlieder9789 Před 6 lety +1

    Great video Stefan and nice work mounting your new chuck.

  • @tonyburndred9828
    @tonyburndred9828 Před 6 lety +5

    Pleased to see you back Stefan, nice work

  • @billchiasson2019
    @billchiasson2019 Před 6 lety +1

    Another awesome video! Always enjoy watching them.

  • @silverbullet7434
    @silverbullet7434 Před 6 lety +2

    Excellent job , great the way you detail everything with explanations. Thank you , Master Machinist , my old 6 jaw I'm sure will be torn down and serviced at some point. Since I've never done it before , watching it done just inspires me to do it.
    I'm always amazed with your work and the way you do things. God bless

  • @MegaCountach
    @MegaCountach Před 6 lety

    Another great video Stephane, keep em coming! Cheers, Doug

  • @normanfeinberg9968
    @normanfeinberg9968 Před 6 lety

    Nice shop practice.You bring a lot to the job site so it looks easy,but of course it's not.It surprises me how many people in the U.S.A don't have a clue how things are made.My hope is that people like yourself will enlighten them.Thanks,keep up the high quality videos and creative energy

  • @akfarmboy49
    @akfarmboy49 Před 5 lety +2

    some how I missed this video, glad you got on the 6 jaw chuck band wagon, I can't live with them, i need to cam-lock base to mill. thank you have good day , liked the town video at end.

  • @FeeeshEP3
    @FeeeshEP3 Před 5 lety +2

    Top! Könnte dir den ganzen Tag zuschauen. Wirklich toll was du da machst!

  • @iteerrex8166
    @iteerrex8166 Před 6 lety +1

    Good to see you after a long time Stefan. Congratulations on the very nice new acquisition :) Don't be a stranger now, drop by once in a while lol

  • @timmallard5360
    @timmallard5360 Před 6 lety +2

    Awesome as always! I'm going to look into these. Love the new intro music reminds me a playing Mega Man as a kid!

  • @hussainali9999
    @hussainali9999 Před 4 lety

    Thank you Stefan, you teach all the world, thank again from SAUDI Arabia

  • @metusa666
    @metusa666 Před 6 lety

    Very informative video i have a second hand chuck in my collection and one pinion was marked with a ring of dot punch marks now it makes sense I learned something new thanks

  • @ClipperDays
    @ClipperDays Před 6 lety +1

    Great to see you back.
    I noticed you use a vacuum when turning cast iron. I do the same and boy o boy, what a difference when cleaning up afterwards.
    My 6 jaw came with the lathe and needs the cleaning and set up correctly, so well timed video. Thanks.

    • @StefanGotteswinter
      @StefanGotteswinter  Před 6 lety

      Yes - I did a fair bit of cast iron in the recent time, and I learned to use the vacuum, otherwise the shop ends up to look like a coal mine.

  • @PhilsProjects
    @PhilsProjects Před 6 lety +2

    Halo Stephan. I have developed the habit of always tightening the chuck on the 0 on all my truset chucks, after a while it becomes automatic.
    great video, its always interesting to see your setup's

  • @TraditionalToolworks
    @TraditionalToolworks Před 6 lety +2

    Very nice video, great job on that backplate. I have so much respect for you guys using 6-jaws, I almost always use a 4-jaw to help compensate for my poor machining...;-) OTOH when I watch you adjusting each pinion, it doesn't seem too different than a 4-jaw...very nice how you surface ground that backplate, that bore really fit nicely on the spindle nose! :-)

  • @literoadie3502
    @literoadie3502 Před 6 lety

    That chuck and back-plate look beautiful. Holding some large-diameter thin-wall parts will be fun!

  • @markfulmer8501
    @markfulmer8501 Před 6 lety +1

    HI Stefan- thanks so much for another excellent video

  • @12345NoNamesLeft
    @12345NoNamesLeft Před 6 lety +1

    It's a sweet Stefan Sunday !

  • @copasetic216
    @copasetic216 Před 6 lety

    That’s a great idea to remove the chuck for testing the fit. Nice video man. Good to see you as always

  • @TheMiniMachineShop
    @TheMiniMachineShop Před 6 lety +3

    As usual picked up something new.. rotabroach.. so tired of the chip mess from drilling and boring all the material out to get a 1" hole! Thank You!

  • @richardgregory6653
    @richardgregory6653 Před 6 lety +1

    good timing on video as I am looking at purchasing a six jaw for my lathe (200mm),excellent job!

  • @63256325N
    @63256325N Před 6 lety +1

    Good to see you. Good job and thanks for the video.

  • @googleuser859
    @googleuser859 Před 6 lety +14

    Welcome back :-)

    • @williammills5111
      @williammills5111 Před 6 lety +2

      Stefan-
      Always glad to see another video from you; clear, concise and accurate, just like your workmanship!
      Many thanks...
      Bill

  • @TAWPTool
    @TAWPTool Před 6 lety

    Yet another great video! Thanks for posting.

  • @rollandsicard1628
    @rollandsicard1628 Před 6 lety

    As always, an excellent video, very precise language.

  • @ROBRENZ
    @ROBRENZ Před 6 lety +31

    Excellent video Stefan! Glad to see you did the tubular handles in the photos. They are so comfortable. I would say something about your video frequency but who am I to talk ;-)
    ATB, Robin

    • @wileecoyoti
      @wileecoyoti Před 6 lety +12

      ROBRENZ both of you should be posting more often :) but, you know, somehow without sacrificing quality or content...

    • @iteerrex8166
      @iteerrex8166 Před 6 lety +6

      Yes Robin what ever happened to that giant stone? Collecting dust? Weeds growing around it? Using it as a stepping stone to the get to the top shelves? or what lol. Dont know u so hope u dont mind a friendly msg.

    • @Larry1942Will
      @Larry1942Will Před 6 lety +3

      I'm also looking for the next surface plate video.

    • @StefanGotteswinter
      @StefanGotteswinter  Před 6 lety +5

      Thanks! The tubular handles are so much nicer to the hand. Did that also to my vice-wrench and the colletcloser on my 5C indexer...
      Holding my breath until you release a video!

    • @andyZ3500s
      @andyZ3500s Před 5 lety +1

      Is ATB a secret code of top ranked machinists?

  • @sharkrivermachine
    @sharkrivermachine Před 6 lety +4

    Very nice work as usual, thank you for sharing

  • @andymandyandsheba4571
    @andymandyandsheba4571 Před 6 lety +1

    hello good to see you back again

  • @denniswilliams8747
    @denniswilliams8747 Před 6 lety +1

    Always inspiration and incentives.
    Thank You

  • @tuffymartinez
    @tuffymartinez Před 4 lety +1

    Hello Stefan...I am slowly making my way through your video library...Such a pleasure!!! ...Or should I say a very positive mindset to approach the work by the A-B-C's instead of cutting corners...TM

  • @tobyw9573
    @tobyw9573 Před 6 lety +1

    That runout adjustment mechanism is extremely meaty!

  • @Larry1942Will
    @Larry1942Will Před 6 lety +1

    Seems like an exceptionally nice Chinese chuck. I have a Chinese 5C chuck with the adjustable back and it is also very nice. So they can do nice work at still reasonable prices, just don't look for the cheapest.

  • @CreaseysWorkshop
    @CreaseysWorkshop Před 6 lety +1

    Thanks for explaining balanced cuts. I wish I had known that. So obvious once you know, but I didn’t!

  • @ianmcdonald7368
    @ianmcdonald7368 Před 6 lety +4

    Varying run out using different pinion position on the chuck......that's why one of them has a little "O" mark on it so you don't get lost. Another nice vid Stefan, been following your progress on Instagram, keep up the good work.

    • @chrisstephens6673
      @chrisstephens6673 Před 6 lety +1

      Ian McDonald and if there is no "O" it is the key hole by the the label.

  • @glennfelpel9785
    @glennfelpel9785 Před 6 lety +1

    Excellent as always, Stefan. Who ever could do a thumbs down? Strange isn't it.

  • @garyc5483
    @garyc5483 Před 6 lety +1

    Nice job Stefan. Wish I could justify a 6 jaw. Maybe one day. Thanks for sharing. regards from the UK

  • @davesmith9325
    @davesmith9325 Před 6 lety

    Nice to have you back.
    prefer this music 😉

  • @68sweetnovember
    @68sweetnovember Před 6 lety +1

    Wonderful. Looking forward to seeing you using this :-)

  • @machiningbasics1729
    @machiningbasics1729 Před 6 lety

    Scroll jaw chucks can be very accurate. I have 2 3 jaws one for rough work and one for precision work. I’m still a 4 jaw and faceplate fan. Nice video !!

  • @mausball
    @mausball Před 6 lety +3

    Nice work! I especially loved the callout to EEVBlog ;-)

    • @666Tomato666
      @666Tomato666 Před 6 lety

      call-out was nice, but the accent 'orrible ;)

  • @macebr5394
    @macebr5394 Před 6 lety +38

    "I always loose the spring on the key..."
    xD

    • @StefanGotteswinter
      @StefanGotteswinter  Před 6 lety +17

      I have realy no idea how this happens :(

    • @ianide2480
      @ianide2480 Před 6 lety +1

      Take note, He drops the key less than a minute later. All I could think was, I think I found out how he losses the spring hehe...

    • @MrShobar
      @MrShobar Před 6 lety

      "lose"

    • @robertklein9190
      @robertklein9190 Před 6 lety

      "lost"

    • @turningpoint6643
      @turningpoint6643 Před 6 lety +3

      I had to chuckle at that as well. Anyone when first learning not quickly teaching themselves to automatically remember to remove the chuck key after once or possibly twice forgetting it, then maybe operating machines isn't for them? Drill chuck keys with the spring loaded "safety" addition are even worse to try and operate. The garbage can is the best place for those springs. :-)
      Great video as always Stefan, I have the exact same spindle nose on my lathe. I've yet to figure out why they just didn't use a D1-3 mount. It could hardly add much more to the machines selling price and would be a better and more repeatable mounting system. The later models of my lathe did start being offered with that D1-3.

  • @wolfitirol8347
    @wolfitirol8347 Před 5 lety

    Zentra you can always buy at the moment they have good quality and medium priced... For less than the half of the price you get a SanOu 6 jaw direct from China but than you have to have little luck to get a perfect chuck i bought two steel chucks 160mm from them and they are excellent made i didn't expect such a good product for about 100eu that's why i bought the second 😁 with my DIY D1 4 backplates i can chance them within short time...Stefans lathe has also a very fast and good spindle nose.. and yes they have normal 7° 7' 30'' short taper just like the camlocks...top Video as always Stefan 😎

  • @shawnmrfixitlee6478
    @shawnmrfixitlee6478 Před 6 lety +2

    Great job , ENJOYED !

  • @joecnc3341
    @joecnc3341 Před 2 lety

    Ausgeseichnet video, Stefan. Vielen dank!

  • @moleklm
    @moleklm Před 6 lety

    great video production and explanation of procedures.

  • @brandontscheschlog
    @brandontscheschlog Před 6 lety

    Awesome addition to the lathe.

  • @MF175mp
    @MF175mp Před 6 lety +1

    Quality video as always.

  • @terrylarotonda784
    @terrylarotonda784 Před 6 lety

    Great work as usual

  • @keith73z28
    @keith73z28 Před 5 lety

    Very enjoyable video. You have quite the following on youtube. I see some of the very best
    machinists and also likeable creators here following your content. = Damn good Stefan.

  • @dgedi78
    @dgedi78 Před 6 lety +10

    Now you can machine high precision macaroni. Take that ThisOldTony ! :D

  • @outsidescrewball
    @outsidescrewball Před 6 lety +1

    enjoyed--great discussion/instruction/build

  • @grahamdowdell4356
    @grahamdowdell4356 Před 3 lety

    Just so enjoyable to watch.

  • @JCisHere778
    @JCisHere778 Před 6 lety +3

    Love the intro music. 😁

  • @ryanb1874
    @ryanb1874 Před 5 lety

    I wish I had some of the things you have, keep building and being wear-conscious

  • @adrianblack7966
    @adrianblack7966 Před 5 lety

    Happy Birthday, this video!

  • @lockbuilder
    @lockbuilder Před 6 lety

    Great vid as always. I really enjoyed the footage at the end too. What a charming little town! I could do that on one of my vids but it would show homeless people milling around a sacked out town 😨 lol

  • @matthewhelton1725
    @matthewhelton1725 Před 6 lety +1

    Steven, I have the same problem with my chuck keys... that spring always seems to fall off.

  • @bigass197
    @bigass197 Před 6 lety +1

    :D No hupa dupa pls ! Nice to see your stuff again.

  • @JBFromOZ
    @JBFromOZ Před 6 lety +2

    Very cool! So much to learn

  • @Gkuljian
    @Gkuljian Před 6 lety +3

    That was a good logical demonstration of chuck accuracy. I was previously of the mind that if one needed to use the same pinion, then the scroll was worn. But in reality, no scroll fits perfectly. And why not aim for accuracy, even though it's not a collet. What was that about Chuck Norris? Haha.

  • @DDB168
    @DDB168 Před 6 lety +1

    Nice job Stefan

  • @scottmacintyre8647
    @scottmacintyre8647 Před 2 lety

    Not sure I followed the 4 hole PCD when you want 3 holes - surely that puts them at 90 degrees rather than 120...what am I missing ? Great content, so helpful. Thanks

  • @Mytuberify
    @Mytuberify Před 3 lety

    Usually the, on the chuck, “0” marked pinion is the one that gives you the zero runout tightening. Could it be you switched the pinions around since you not tighten to zero runout where the “0” is stamped?
    Good stuff all the way, your channel is. Keep it up👍

  • @1873Winchester
    @1873Winchester Před 5 lety

    I am looking at a 125mm Zentra 3-jaw chuck right now, adjustable with 2 piece jaws.
    I thought they where made in europe though! I was told by someone they might have been made i the same factory as bison chucks.

  • @PaulWattsSpringGunning
    @PaulWattsSpringGunning Před 6 lety +1

    My older Buck six jaws only had one pinion. Don't know if Buck did that on purpose or not? I have a newer Taiwan made Buck that has two pinions. While there is a slight difference in repeatability between the two it is very slight. Less than .0003 inch. On a older Chinese six jaw I used to run it always ran .0006 with just grinding the jaws. I do a lot of thin wall plastic parts. distortion of the parts when doing ID work is too great with three jaw chucks. I absolutely love six jaw chucks after making the change. Solid jaws like the one you have will go down to smaller diameters without having to make soft jaws like two piece jaw chucks would require you to do also. Your chuck looks to be of very good quality. Nice score!

  • @modellbautorsten9535
    @modellbautorsten9535 Před 6 lety +1

    Danke für das ausführlich Video. Mach weiter so.

  • @gudynielsen8780
    @gudynielsen8780 Před 5 lety

    Hey Stefan
    As always nice work, just got a set of twins in form of a 3 and 4 jaw Röhm ZS 140..😁 So i need to make some backplates..Where do you buy the GG25 in that size, Denmark is useless in that area 😏

  • @ronpeck3226
    @ronpeck3226 Před 6 lety +1

    Thanks Stefan, you will be spoiled with the six jaw, you can chuck up eggs with it, and they don't have to be boiled!

  • @Gottenhimfella
    @Gottenhimfella Před 6 lety

    Stefan
    You didn't show a final check, on nutation, or wobble of the workpiece axis relative to the spindle axis. Another way of saying this, I suppose: how perpendicular are the jaws to the face of the spindle nose? including at different diameters?

  • @audicad4807
    @audicad4807 Před 5 lety +1

    i like your video ! from vietnam

  • @joshua43214
    @joshua43214 Před 6 lety

    Nice job as always.
    Is "bee zhon" the proper way to pronounce Bison? I always assumed it was "bye son" because they use a bison in their logo.BTW, you have a "0" on that chuck marking the key hole that was used during manufacture.

  • @bubbajoexxx
    @bubbajoexxx Před 5 lety +1

    you will love the repeteabilty and accuracy of the 6 jaw

    • @StefanGotteswinter
      @StefanGotteswinter  Před 5 lety

      Absolutely - I used it extensively now and I love it. It repeats just as nice as my collets, the adjust tru works great and the holding power is insane.

  • @claudiokoepsel7037
    @claudiokoepsel7037 Před 6 lety

    Good job 👍

  • @ryanb1874
    @ryanb1874 Před 5 lety

    on your 6 jaw, you use one pinion, lug position for final tightening, but, do you mark all of them and rotate the pinion you do tighten so they all get used and you don't warp something?, in different jobs of course

  • @mechmodhomeshop
    @mechmodhomeshop Před rokem

    Hi Stefan, you are a light house for me, thanks for your passion and thanks for your video. Please I need to ask you something, where dis you take that beautiful block of Cast-iron? I can’t find here in Italy, in Italy the industry can find and have everything and more, but private people can’t find materials, even C40 some time is hard to find for us. I will love to do a fix tool-post base for my lathe, now I dis in C40 putti g together two block, but c40 didn’t absorb vibrations, etc. please can you tell me a name of a possible supplier? Thats sale small quantity when needed, thanks Stefan

  • @MrZhefish
    @MrZhefish Před 5 lety

    where did you buy it? could you share some of your ressources where you buy your lathe/mill and other machinists tools please? would be most helpfull. danke :)

  • @roleic7246
    @roleic7246 Před 6 lety +1

    Nice project again, Stefan. To my eye the stick-out of the whole chuck assembly seems a bit long. But since you want to mainly use it for plastic work with its rel. small cutting forces it is plenty rigid for that. Concerning the video frequency of course everybody would enjoy more and more of the good videos coming; daily if possible... But we all know that they are a lot of work. So keep the pace such that it is also fun for you then the excellent quality keeps its level to the joy of everybody: you and the viewers. (and if you keep them waiting a bit they appreciate your videos even more...;-)

    • @StefanGotteswinter
      @StefanGotteswinter  Před 6 lety +1

      Ahoi!
      Its not much more overhang as with my 3jaw - I used the 6j already for a bunch of stainless and toolsteel parts and, the increased holding power/stiffness from the better clamping outweights the slightly larger overhang by far B)
      I wish I could do more videos, but making parts and sending them out pays part of the bills, adsense doesnt ;)

    • @roleic7246
      @roleic7246 Před 6 lety +1

      Stefan Gotteswinter
      As I said I am happy with your output in quality and quantity. Have you asked your customers whether you can videorecord making their parts? If they allow it you could make more of your interesting vids. Fenner is doing that often. Hit two birds with one stone.

    • @StefanGotteswinter
      @StefanGotteswinter  Před 6 lety

      Keep in mind, filming makes stuff take 3 times as long as it would normal take ;)
      I try to film as much customer projects as possible, but as said, its just not always possible. And editing can be a chore if the narration is not already done when recording. Voiceover takes forever :/

  • @johnthayjr4237
    @johnthayjr4237 Před 6 lety +1

    Good job

  • @ianpendlebury3704
    @ianpendlebury3704 Před 6 lety +1

    I was wondering where you had got to? Interesting, as always.

  • @MarkW321
    @MarkW321 Před rokem +1

    Cool!

  • @arcrad
    @arcrad Před 6 lety +26

    Don't turn on it, take it apart!

  • @bartouleterrible
    @bartouleterrible Před 6 lety +3

    Still a pleasure to see your video (as your instagram account). A question from a newbie why are you using grey cast iron and not steel? because there no risk for safety and it's cheaper or for any other reason ? thank you for sharing both your project, experience and comments. It's always instructive and interesting.
    greetings from france !

    • @turningpoint6643
      @turningpoint6643 Před 6 lety

      Gray cast iron is used because of it's vibration dampening abilities and is pretty much standard for most factory machined back plates unless the chuck is designed for and meant to be used on a high rpm machine.

    • @StefanGotteswinter
      @StefanGotteswinter  Před 6 lety +1

      Mostly because cast iron wears better than unhardened steel. Dampening abilities of cast iron on such a solid part do not have much effect.

  • @bcbloc02
    @bcbloc02 Před 6 lety +3

    Nice clean up and get in operation video. Audio got tough there at the end, I could only make out some of what you were saying.

    • @StefanGotteswinter
      @StefanGotteswinter  Před 6 lety +1

      Thanks! Not sure what with the audio happened. But I guess what I said was not as important ;)

  • @wauser5456
    @wauser5456 Před 6 lety +1

    Do you ever plan on marking or filling the pinions to have a dedicated one to use, or do you just use the pinion with the 0 punched outside of it?

  • @tobyw9573
    @tobyw9573 Před 6 lety +3

    I have a Rohm keyless drill chuck, I might not have bought it if I had known I could not pronounce the name, LOL. ;)

    • @tobyw9573
      @tobyw9573 Před 6 lety

      Hmmm. Perhaps Stefan can’t pronounce Rohm either... But how will we ever know?
      But seriously, I had heard that “les Chinois” had been moving from “kits” (as Stefan called them) which required a complete d/a, cleaning, and remachining, to top quality. This unit seems to be an example of that strategy.
      Thanks for sharing! :)

  • @tomaszkazmierczak7327
    @tomaszkazmierczak7327 Před 3 lety

    Stefan - backplate from cast iron or from steel? What is advantage of cast iron backplate if there is any?

  • @machineshopatthebottomofth3213

    Interesting as ever Stefan. Is the three jaw going to clutter up the shelf from now on or is there a situation where you will still use it?

    • @StefanGotteswinter
      @StefanGotteswinter  Před 6 lety +2

      Yep - As a Softjaw chuck :)
      As we speak, I got it mounted with large aluminium pie-jaws bored for a recuring job.

    • @machineshopatthebottomofth3213
      @machineshopatthebottomofth3213 Před 6 lety

      Great use for it. Looks like a 6 jaw may have to be on the birthday list for me!

    • @tobyw9573
      @tobyw9573 Před 6 lety

      It appears the geared side of the scroll plate has galled the rear body of the chuck where it absorbs the thrust of the scroll. Why: Debris? Soft metal? Lack of lube? Insufficient bearing area? Certainly was not high rpm from tightening chuck too rapidly! ;)

  • @-Mats
    @-Mats Před 3 lety

    Can you recommend this Zentra six jaw chuck or would you have bought another chuck if it was today? How often do you center it?

  • @somebodyelse6673
    @somebodyelse6673 Před 6 lety +2

    None of the gear parts are sintered metal? Thanks for sharing with the world!

  • @MaximumDistortion2
    @MaximumDistortion2 Před 3 lety

    Hallo, ich habe eine Frage: Sind die Zentra-Futter generell zu empfehlen? Denn der Preis der Zentra-Futter ist zwar verlockend, allerdings mache ich mir Sorgen um die Qualität bei so einem Preis.....