Jaw movement you probably weren't aware of !

This video explains, and shows chuck jaw movement during clamping. I offer suggestions and reasons for the best setup for grinding your jaws to achieve the best results. If you plan to grind your jaws, you might want to watch this video.

[@scottlundy257]

Well done again Joe thanks for your time really enjoy your shows.

[@vernonkarm8016]

I wish I had you as a teacher in my younger machining days. At 60, I basically had to learn things the hard way....lol. I love your style. Keep up the craft......From Dallas

[@joepie221]

Thank you

[@frankjud2267]

Happy holidays! Learning alot from your videos. I wanted to thank you for taking the time to share your wealth of knowledge!!!

[@ThetaPower]

Always the straight info. Thanks again for a well thought out presentation.

[@angelarmas8017]

This explains why I was having problem grinding the jaws. I am a REAL newcomer to machining and enjoy the reasons why things are done the way they are done. I am learning a lot from your channel. Merry Christmas

[@EddieTheGrouch]

When I did one of mine I chucked a ball bearing near the front and bored a shallow pocket into the face of the jaws after truing them up. This holds a ring for grinding and gives me a nice fixture for facing thin washer and spacers. Thanks for demonstrating physics and cause & effect - something I see lacking in many videos and methods. Merry Christmas!

[@ncforster]

Merry Christmas and a happy and prosperous new year , Thanks you for the informative videos this year please keep them coming . Yours from the other side of the pond Nick

[@ironken1796]

Alot of prep obviousely went into this video. Thank you for taking the time!

[@johnsawyer2516]

Thanks Joe Have a good Christmas and prosperous new year

[@johnmcdonnell6109]

Another great explanation and demonstration!

[@joecnc3341]

Thanks Joe - another Awesome video!

[@taogden]

great timing on this video, I was going to tackle my Chuck over the holidays, thanks, and Merry Christmas to you and yours

[@RRINTHESHOP]

Great Demo Joe. Thank you and Merry Christmas.

[@BasementShopGuy]

Joe - you're like the machinist-detective. Love these videos, as they show us the issues. we often overlook or don't even realize.

[@joepie221]

Hey Brad. Its good to have a full arsenal of details. I think it helps solve problems they cause if your aware of them. Hows the heat in your new shop holding up?

[@ChrisB257]

Brilliantly explained Joe - nice demo.

[@davidcolwill860]

Another thing I hadn't thought about. Like so many things, obvious when you think about it ( or someone else tells you ). I have to admit to the ring at the back of the jaws in the past but now I'm converted. Fortunately it is very hard to forget information like this, so thank you for another useful video. Merry Christmas and a happy new year ( with more videos! )

[@ianrobinson7468]

Informative as usual Joe. Merry Christmas from the UK

[@tomgullan3565]

Thanks Joe for another informing video. I hope you had a nice Christmas.

[@cavemansmancave9025]

Merry Christmas, Joe. Great tips. Thanks. John

[@skeeter50001]

Good information, Joe. Would like to wish you and your family Merry Christmas, and great New Year.

[@mrfrog3350]

Great vid Joe. Thanks for posting it.

[@nineringsh]

Another great video, it's full of common sense solutions that many of us overlook! Merry Christmas to you and yours.

[@shadowdog500]

Another excellent video! Merry Christmas!!! Chris

[@dws8364]

Thanks Joe. Another great tip. I thank you for your efforts to share your vast knowledge. It helps immensely. Your presentation methods are spot on. Your dialogue is precise and to the point. It’s also fantastic that you take the time to not just talk about the subject, but you demonstrate in in a real setting, on pertinent equipment. Thanks for taking time out of your busy schedule to share.

[@joepie221]

Thank you.

[@xnoitulos]

Fully agree! I really enjoy that the tips apply to basic machining operations, yet would only be discovered through much experience. Great stuff!

[@bcbloc02]

Merry Christmas, many excellent points in this video. I would like to touch on a few more points sometime on this based on my experiences. Keep the vids coming, I enjoy!

[@bulletproofpepper2]

Thanks! joe. Hope your Christmas is marry. I made a chuck concentricity collet (from your other video) worked very well. Thanks for the plans also have been gathering aluminum to make two of them, one for my dad and one for myself. Thanks for the myth busting.

[@phobos977]

Thanks for the grinding tip, worked great for me.

[@stanwooddave9758]

Thank you for this video, Joe. A Merry Christmas to you & yours. :-)

[@thomasjake3920]

Merry Christmas right back at you Joe.

[@StraightThread]

Merry Christmas, Joe! Thanks for the master's lesson from your wealth of knowledge. Yours is the most logical, concise insight into jaw grinding that I've ever seen or read. The practical demo really drives home the classroom explanation. It's always a pleasure to view your videos.

[@joepie221]

Thank you Richard.

[@robbingham3987]

Once again, fantastic vid, very clear and concise, thanks so much for your time you put into these tutorial vids. #1 on my YT list of machining tips vids, thanks Joe.

[@joepie221]

Thank you.

[@jimmymyers7683]

Merry Christmas to you and yours!

[@outsidescrewball]

Great info...Merry Christmas Joe!

[@keldsor]

Hi Joe A very nice eye-opener for small details - nice ! A Merry Xmas and a Happe New Year to you and yours too ! From Keld in Denmark

[@joemiller5110]

Thanks Joe Keep the videos coming!!

[@wlogue]

thanks Joe, merry Christmas!

[@goldsearcher55]

First up Joe.... Merry Christmas to you and your s. Excellent video. As a newbie to machining, I had this same problem with the 3 jaw chuck. whereby I could not get consistent results. After a tool and die maker told me the same thing as you just explained, by supporting the back of the chuck, made all the difference in the world. The smaller parts were always the worst. Thanks again for the video

[@TheParafin100]

Merry Christmas to you and yours from Norway

[@oh8wingman]

I like your videos better than any of the others I have found here because I always learn something of value. That being said, would you be able to give an actual demonstration of how to grind the jaws?

[@terrax-nq4mo]

Hello Joe, greatings from Germany, thank you very much for the excellent Videos. Merry Christmas

[@AmateurRedneckWorkshop]

Merry Christmas to you and yours. If this channel had started sooner it would already be in the big 10 of machine shop channels (as indicated by subscribers). The other guys can give you a high school diploma in machining but Joe Pi can give you a PHD. I forgot to mention that I have seen the ring around the chuck thing before several times and it always left me with that uncomfortable feeling that something was being done backwards but who am I to question the experts.

[@joepie221]

Now, you not only know you were right, but now you know why. Trust your gut. Thank for your comment.

[@PhilsProjects]

Happy Holidays Joe , all the best for the new year

[@krazziee2000]

very good info, thanks for the lesson.

[@JeffreyVastine]

Another topic that was explained in a clear and concise manner which is easy for anyone to comprehend. Nice work Joe! Thank you for your willingness to share your knowledge as well as the time and energy that you invest in doing so. You are very much appreciated.

[@joepie221]

Hey Jeffrey, thanks for the comment. How are the boys doing?

[@JeffreyVastine]

The youth are doing well. We have both boys and girls age 5 on up and you would be amazed by the interest the young ones and especially the girls show in machining and simply making things in general, whereas it seems the older ones take a little while to get into that aspect of the project.

[@joepie221]

Thats awesome. Inspiring a young mind is something that can only end well. Way to go. Tell the girls, they rock!

[@mikenixon9164]

Good video Joe I hope you had a Merry Christmas & all the best in the New Year.

[@joepie221]

I did. Thank you. Always good to see my kids smile.

[@jaysong7958]

great info Joe merry Christmas

[@joandar1]

Great Video Joe. I am getting closer to having a look at my lathe three jaw chuck, (need to finish the internal grinding attachment) this is the direction I am planning to go. However I have one more twist to the tale and if I am correct I think a can negate almost 100% of the pitfalls in this process. I will keep you posted if you are interested. Cheers from John, Australia.

[@terrylarotonda784]

Good info. Merry Christmas

[@johntenhave1]

Insightful as always. thank you.

[@razorworks9942]

Hey Joe, I'm sure you've heard this a thousand times, but I really appreciate you sharing this kind of information with me anyway, as I've always been the "why" guy! Why does it do this, Why does it do that? Your explanation on the results of what will happen based on setup makes total sense to me! Now when I get ready to grind my jaws, they should turn out a lot closer than what other's have posted!! Merry Christmas to you and your family! Razor!

[@richardkicklighter1202]

Great tip! I have watched many channels. some techniques are good, others aren't worth wasting the brain space. I like your channel, I just barely found it.

[@johnwilimczyk4188]

Merry Christmas Joe to you and all you hold dear and a Happy New Year

[@fredparkhouse]

another great video. merry christmas. Fred from the U.K.

[@yosmith1]

Very interesting demonstration. Definitely something I'm going to test on my chuck jaws. Hope you and your family have a very merry xams! Thanks for sharing neighbor

[@joepie221]

Merry Christmas Neil.

[@MrJackanapes57]

I ground my three chuck jaws while spinning the lathe at high speed. Centrifugal force acted on the jaws in a way similar to the force of a part against the jaws as they are tightened. This gave excellent results. Thanks for the informative videos.

[@doriancharles608]

Merry Christmas Joe to you and your family

[@TrueMachine2]

Thanks Joe, I ground my jaws last year, with a ring at the back as you described... and of course was horrified to find, it did not fix the problem. This video explains why! And I thank you for that. I will try your groove idea, this will save me buying a new 3 jaw chuck, Thanks!

[@minasianjohn]

Joe, Merry Christmas to you and yours, good to see you bring up the " spider" which I always used 40 or so years ago, l'm glad you are passing good info. to the machinists. john

[@joepie221]

Hi John. I lost my Father back in 2001. he was a brilliant electronic engineer. When he passed, I thought what a shame it was that he took so much valuable knowledge with him that will never be spoken. This KZbin contribution is small, but I hope it helps the guys that need it. Old School Rocks ! Thanks for the comment.

[@k5at]

Merry Christmas, Joe!

[@justinhobbs7514]

Thanks Joe Merry Christmas

[@817charger]

very usefull info. Enjoy watching you.

[@ellieprice3396]

Joe, you're exactly right on the proper way to load and grind chuck jaws. My chuck has two piece jaws and I've used the plate with three pins with good success. The three pins are sized to fit inside the hex of the lower cap screws. Thanks for making this often misunderstood solution so clear.

[@joepie221]

Thanks for watching. It bugs me when I see other channels lead guys astray and leave them hanging. That plate thing is awesome. I have an idea for another way I may soon disclose. Maybe!!

[@pierresgarage2687]

Hi Joe, Pretty busy around here for the Holidays..... I wish to you and your family a Happy Holiday time, Pierre

[@michaeltrumble3858]

thanks Joe that explained the theory and practical side perfectly. Brilliant .

[@eddyfontaineyoutu100]

Merry Christmas Joe !

[@kurtarmbrust]

And a Merry Christmas to you too.

[@twitchyourwhiskers]

Thank you for the theory. It is always better for me to understand the theory and not just go through the motions because someone said so.

[@johnhutsenpillerjr1785]

Your Good !!! Nice video Sir I'd like to see a video on leveling the table/frame And a video on setting up the tailstock. LIKE I'VE SAID MANY TIMES BEFORE TO PEOPLE YOU CAN'T ADJUST WHAT'S WORN OUT !! but that's just me. ALL THE BEST TO YOU AND YOURS SIR.

[@ClownWhisper]

This is awesome I was just thinking this very thing because I found a metal ring that would be perfect that I made a long time ago and then I thought there's going to be wiggle in the opposite direction and then I sit down and this is the first video I see you after that

[@dennislee444]

good lesson thanks joe ,

[@1jtolvey]

GREAT VIDEO !!!

[@davepage535]

Hi joe I would gladly work in your shop for nothing other than to gain some of your knowledge Keep up the great videos cheers from New Zealand

[@MrJugsstein]

Enjoy Stay upright good biking Will

[@zsplit1700]

Very Informative. Thank you for the continued uploads Joe! In the future can you kindly do a video on how to offset a 4 jaw chuck to create holes on center., as well as how to find the center of an already created hole with a dial test indicator.

[@joepie221]

kzbin.info/www/bejne/jXTImmh9oaqNa8k Check this one out.

[@robinstokes5179]

Nice bit of teaching. I've got a lot to learn!

[@joepie221]

There is endless material. I'm still learning.

[@jeffryblackmon4846]

Your whiteboard and cardboard jaws demo-brilliant!

[@joepie221]

I just happen to have giant wooden jaws laying around so I decided to use them. Glad you liked it.

[@MyShopNotes]

Thanks for the vid, I never considered that the jaws would kick out.

[@planeflyer21]

Just like a spinning, 3-jaw vise: don't clamp just on one side. On a hobby lathe/mill/drill several years ago, I was making a spacer to mount a QCTP. I had some 1 1/2" stock to use up. Drilled the through hole, very happy...until I pulled it out of the chuck and the exit hole on this 4" long piece was over 0.250 off center. Took me quite awhile to trace that the scroll had literally bent in that spot (thanks Hercules) for the one jaw. I may still have that work piece. If I can find it, I'll email you a photo.

[@ramviswanathan3301]

Hey Joe, Excellent educational video as always! It is great to learn the WHY along with the HOW. Your channel has busted several myths for me. I've seen others use a hex nut with bolts every other flat section as a spider. Where can I find the steel ring that you use?

[@joepie221]

I made it out of a piece of thick wall pipe. 3/8-16 tapped holes every 120 degrees.

[@peterparsons3297]

certainly something to think about

[@worthdoss8043]

Just went out and checked my jaw movement, it is .0008-8/10ths front and back. I never could figure out why people were loading jaws out and not in, I thought I was missing something. Thanks for showing people this.

[@andrewrowbotham2347]

Hi Joe, another good video. Have watched it a couple of times to try and understand the purpose of the spider and how to use it. Any further info/ a short video explanation would be greatly received. Andy

[@joepie221]

Its used for soft jaw boring. I have had other requests for clarification and may post a video to show it. Thanks for the comment.

[@mpetersen6]

And Four Jaw Chucks do all of the same things. One reason where possible I much prefer collets if possible. Although I realize that is not an option for most shops over a certain size.

[@joefalmo5528]

Joe i have 16 die grinders cr,ir ,aircat ,blue point,eagle and 1 snap-on, the snap-on has been sent in twice both time's for bearings the first time it didn't run for a hour second time it was bad out of the box so i disassembled, the bearings were from china and of very poor quality , snap-on was going to send it back for repairs i opted to replace the bearings myself and so far it is still working FYI . HAPPY HOLIDAYS and thank you for the informative teaching video's

[@joepie221]

Hi Joe. Thanks for the review, fear not...snap-on now owns Sioux air tools. Sioux tools make the grinder. happy Holidays to you too.

[@Stefan_Boerjesson]

Thanks for yet another educating video. I have a brand new chuck but checking it up will be interesting. I wonder what the target should be for worn jaws. You can't grind the jaws to good alignment for both the cases, grabbing a long object well, the entire depth of jaw being in contact with the stock, and a short grip, only some 1/2 inch or of jaw depth being in contact with a short object. The amount of distance that the jaws "rises" will be different as well as the grinding angle in the attach of the bended jaw. What do You say?

[@jerhalco]

Good stuff!

[@nickfox6339]

Thanks Joe for replying to my query.

[@joepie221]

Anytime.

[@kiritvara257]

Thanks Joe

[@petemacrae5982]

Thanks Joe! Deck the Halls with Holly! Cheers!

[@glynnraynor6119]

Best wishes to you for Christmas and new Year

[@jeepmanxj]

I've always cut a taper in soft jaws on a cnc. When preparing a second op I always give my jaws a fresh skim, clamp the part at the pressure I'm going to use and check with a .001-.0005 feeler shim. One of the older guys dykems his part to verify solid contact. I only ever ran one engine lathe where we used soft jaws and they were less there to clamp the part and more there to center it for keeping it concentric while we finished it, and the pie jaws only had a .1 depth and we drove the part to the chuck with the tail stock. So whats your opinion on a longer part where you are clamping completely through the jaws? It will still deflect the jaw and can cause damage on the surface of softer materials like aluminum? I'm sure its tougher to get a small taper to cut than on a cnc.

[@CSGATI]

use pads/shims on the clearence angle on the jaws as far out as you can get them then bore or grind them true . I did i on a 4 jaw that would not hold a part perp. Just indicate the outside of the jaw

[@TomKirkman1]

Good stuff. For a future segment, I'd like to see your take on tangential tools such as the diamond tool holder and bits.

[@joepie221]

Insert tooling?

[@TomKirkman1]

Yes, the cutting tool is diamond shaped on end and held in a tangential holder. Because the cutting point is so well supported and a good rake and relief is found on all sides, you can do various cutting and facing operations without changing the tool or it's angle to the workpiece. At least that is the theory. It certainly makes sense, but I'd like to hear what you have to say about it. Thanks.

[@crookedriver2079]

No..Joe. Look up "Eccentric Engineering" on the Web. It's an outfit, based in Australia that sells the tangential tool holders (brand name for it is Diamond Tool Holder). The lathe tool bit (either square or round shank) is held vertically rather than horizontally - in other words parallel to what would be the Y axis in a lathe, not the X axis. I bought three of their holders, but haven't had a chance to use them.

[@artgoat]

Well, and if you tension the jaw in the opening direction, you're also bearing against the opposite side of the scroll. If you're confident that your scroll is absolutely perfect, with no wear at all, no problem.

[@charleskutrufis9612]

Thank You

[@campranger219]

Yes, I agree completely. Please, what are your techniques on 4 jaw chuck truing? Thanks for sharing your expertise, I always find it clean, precise, and never boring.

[@joepie221]

kzbin.info/www/bejne/jXTImmh9oaqNa8k This may help

[@campranger219]

I'm sorry, I was asking in the context of this video and grinding the jaws true.

[@zim9061]

Merry Christmas!

[@PeregrineBF]

Computer engineer here, and very amateur machinist. Lathe only, at the local makerspace... This is actually the jaw movement I'd expect. There's always some flex in the movable (and fixed!) jaws of a bench vise, I wouldn't expect lathe chuck jaws to be any different. Everything can bend, just like every circuit has parasitic resistances, inductances, and capacitances! Everything also changes size with temperature, so if you're trying for extremely high precision (submicron lapped surfaces) you'll need to keep the temperature constant. I'm sure there are other parasitic effects out there, but I don't know how relevant they'll be for most machining.

[@chrishill6276]

Thats a good idea with the ring cut into the jaws Joe but if you dont want to cut the jaws a bloke called Matthew Tinker has a good alternative thats worth looking at

[@nicholasdautel1228]

This is why I love using collets when possible.

[@brandons9138]

Collets are almost always preferred as they also don't lose as much gripping force due to the rotation of the chuck.