Intro to Jig Grinding by Don Bailey

[@matthewharper170]

great video Don. I am 15 and have done a lot of woodworking/turning in my garage fro about 2 years now. I am a sophmore in high school and joined the robotics club at my school (unfortunately we don't have a shop class), I am also in the engineering program. I've quickly moved up in the robotics program even though it is only my first year. the person in charge of the mechanical sub-team could tell I was a good learner, had experience with machine tools, and was responsible. He trained me on the metal lathe and mill and I have fallen in love. It's really cool to make precision parts, and I really like cleaning the old craftsman lathe at the end of the day. after only a couple weeks I bought my own digital calipers. I have always thought I would go to college and become an engineer, but after doing some research it turns out that a lot of engineers have desk jobs and don't get out in the shop that much. Now I'm thinking about doing an apprenticeship for tool and die! I just fear that I will not be able to get an apprenticeship, that it will all be cnc and I won't use manual tools, or that with everything being done overseas the trade will die out. Any help/tips would be great, and thank you for taking the time to make these videos. -Matt

[@cbeaulac]

id recommend not doing tool and die, its not what it use to be, if you dont get into a good shop and get stuck doing something not related to the trade your pretty much screwed. I was lucky and worked at 2 jobbing shops and 3 major company's and i was able to take alot in, but i know many that were stuck in EDM or CNC or welding.... and learned nothing, when they were let go they didnt stand a chance. toolmaking will forever change for the worse.

[@petera1033]

The vertical scraping in 'situ' would have been a very interesting video in itself Don. Thansk for posting your videos. Pete

[@nickvasquez85]

The amount of knowledge on this channel is priceless! Thank you Suburban Tool for sharing your "tribal knowledge" on the platform for all of the next Gen of machinist and Toolmakers around the world.

[@wasblind4835]

I have ran a gig grinding. The details in your work is awesome. Bridgeport’s are awesome. Also ran and programmed the Bridgeport mills. Love them.

[@SuburbanToolInc]

Thanks

[@McFingal]

Don another fantastic video, I'm looking forward to the next one. Thank you very much for sharing your knowledge and experience with us.

[@skellym37061]

Thanks Don,Another great video!Thanks for sharing your knowledge!Cant wait to see the end!

[@droboepk26]

Hi Don, et al - thank you for this video and the upcoming series. Nothing like it on KZbin. Keep up the great work!

[@EverettWilson]

Thanks for making this video, Suburban! There's so little video on jig grinders that every one published is a treasure.

[@SlowEarl1]

Looking forward to this series on Jig Grinding.Thanks for doing what you do.

[@jayman1601]

This should be an interesting series. Looking forward to it. Thanks for all your videos.

[@brettzahler7403]

I would of loved a couple of videos on all the work you did to the grinder. Can't wait for next Tuesday.

[@intagliode]

Cant wait to see your up and coming videos boys! Keep up the great work!

[@dannychavez310]

Nice job guys.

[@clarencewoll]

Thank you for sharing your knowledge! I'm looking forward to the rest of the series.

[@Waffenschmiedinx]

awesome love your videos, always look forward to new ones

[@jaymachines7587]

Great video Don I'm excited to see it in action! Certainly brought back memories of running one in a mold shop during my apprenticeship, it was such a nice machine just has the feel of a precision instrument not just a machine tool. Never thought I'd see one of those again, you don't see them around much anymore except in auctions.

[@SuburbanToolInc]

Thank you for your comment.

[@Ujeb08]

Looking forward to the Jig Grinding video! I ran a few jobs on Moore Jig Bores many years ago when I was learning tool making, but the Jig Grinding was left for the masters. I left that shop 25 years ago and never saw another Jig grinder or borer. I run a wire EDM from time to time these days to hold tenths but not millionths. So I'm anxious to see this. Thanks for sharing.

[@jdb21867]

A good wire machine will match a jig grinder is many cases if the work does not have a "bottom"

[@Garageworkshop]

I would really love to see a full video on the restoration of the machine that you did. Looking forward to learning more about this awesome machine!

[@mrblack61]

Hey Don. Im into handscraping and remember a discussion a while back that included why mill tables tend to 'droop' or dome. Asides from clamping to T slots it was found over time that they get peened from tools and parts etc being not so gently placed on them. This has a tendency to stress and expand one side leading to the warpage. A trick to counter this when scraping a mill table is to peen the underside to straighten it some, so as to minimise the work in the dovetail surfaces. Also remember a fellow roughing in the bearing bearing of a hor bore table before planing the top. It all moved when the stress was relieved from the upper surface so he had to re scrape. Not good, but educational :)

[@ericroman1645]

Thanks for posting this! I've been curious about these machines since reading Foundations of Mechanical Accuracy, but there's not much info out there. I look forward to learning Moore.

[@johngalt9262]

cool. looking forward to the next installment. Thanks Don & Crew for taking the time to 'pay it forward' :)

[@johannesschuhmann229]

Looking forward to see you doing some jig grinding. I have been looking for videos about it and I couldn't find anything. Keep doing such great videos. Greetings from Germany

[@russhellmy]

looking forward to the upcoming jig grinding series.

[@redleg1013]

Thank you so much for this series, a couple of the instructors talked about "jig bores" and how they could accurately "split a tenth". I haven't found anything showing them or how they work. I wish it was logistically possible to intern as we never got in depth in precision grinding, which I really find interesting.

[@Hirudin]

Jig grinder... never heard of it. No surprise there though as I'm a big newb. The machine sounds amazing though and I look forward to learning more about it!

[@Lu47Dan]

Don, when I went to Vo-Tech here for Tool & Die Technology, we had a Moore Jig Grinder and a Moore Jig Boring Machine in a climate controlled room separate from the main shop. They were very interesting machines to run, I do not know if they even cover them anymore in the machining courses. Dan.

[@geraldgepes]

Also, in jobs where I had to hold squareness to bores and hold bevel angles off set from bearing journals on gears, I've always wanted know how a jig grinder operates. I thank you for this knowledge and I hope I'll be able to run and own one some day.

[@htral]

Can't wait!

[@butdoyou1970]

Looking forward to these....=)

[@larrysperling8801]

very nice,i have been around machine tools all my life ,but i have never seen a jig bore on operation.

[@vtstudio31]

Don & Glen: Wow you cant find this info any where; i am really looking forward to this series.

[@michaelmurray9154]

As a toolmaker in a jobshop I rarely ran our Moore jig grinder. we had full time precision machinists on our key machines. Ours was used mostly on die steels and finishing punch pads post HT when required. Occasionally some profiling of radii was done. running one for me was like watching grass grow!

[@poozandweeez]

awesome, when i was boring out bolsters on the milling machine to take bearing bushes for press tools i wouldve loved one of these machines instead i was chasing +/- 0.01 with a boring head and had to machine the bolsters ensitu to make sure they were accurate, i really miss that line of work it was so satisfying

[@mr.precision9667]

I'm wondering what year that Beauty is and if they are still made like it today? Thanks for all the great videos.

[@rupertpowell]

Can't wait to see the jig borer in action. Don - Please don't let Harpo near it...he seems like a liability!

[@panchovilla1486]

Wonderful. Video Thank you much

[@RalphDratman]

Yes, I like this. I confess it is intriguing, even though I might never apply the knowledge I gain. For now, I am waiting to find out what exactly a jig grinder does.

[@rickbrandt9559]

As Usual, Nice teaser.

[@bcbloc02]

Couldn't you put a indicator in the spindle and run it up and down against a cylinder square to check that it is perpendicular to the work surface by checking it in both axis relative to the spindle?

[@jdb21867]

The spindle can be tilted to grind up to 1.5 degree of taper---if this adjustment is set to grind 0 taper ---yes you are right but if taper is not at "0" ---the cylinder square would read that setting as "head out of square"

[@jdb21867]

in other words " head squareness and spindle squarenes are different "

[@duobob]

Sounds interesting. Moore jig grinder or ?

[@zacharydutcher8653]

do a video on selecting boring bars for mills and lathes.

[@kooldoozer]

Don, I am an engineer but I worked as a machinist in a machine shop when I was laid off. It was a small shop and not run too well. Anyhow, I was running a Moore jig grinder, and the owners insisted that I use carbide burrs to do my grinding. No grinding points to be found. I questioned this and got the old, "just do as I say". I never heard of using carbide burrs except on hand die grinders. Needless to say I never got a finish worth rocky road ice cream. Does this sound to you as crazy as it sounds to me? Thanks.

[@MrSuperawesome5000]

It depends on the material and the process. On soft materials carbide burs can be very accurate and work best in a plunge cut. They can be used for heavy stock removal in hardened materials but they don't react well to small outfeed passes such as .0001 or so. Burs will actually leave the best possible finish if their speeds are right. They can be almost a mirror finish.

[@jdb21867]

@@MrSuperawesome5000 I agree -----with above ----I am currantly grinding test parts with carbide burrs and borezon coated burrs to see what will work best in our application --so far --carbide burrs are leading!!!!

[@geraldgepes]

Hey Don, I noticed you're running the Biax, do you prefer Prussian blue or titanium white?

[@SuburbanToolInc]

Prussion Blue

[@ratman76]

Getting ready to grind 22mm & 29mm holes 8620 material - 62 RC. What speed and feed should we use. How fast do we traverse up and down? How much per paass. Using a 1/2 dia CBN 85148-DM Moore Thanks

[@nocturnodrummer]

exactly, nothing! We have a Deckel jig grinder and we only did a few jobs on it but I'd really like to go deeper with it. Also, it would be nice if you talked about abrasive choice for jig grinder. We have some cbn wheels but the surface finish is quite bad.

[@MrSuperawesome5000]

what type of material are you grinding? What type of tooling? plated wheels, resin bond?

[@nder12345]

We had a Swiss made Hauser jig grinder at school took 4 hours to warm up before you could use it

[@johnnysmith2893]

hey Don do you do any dedtru grinding in the shop.

[@SuburbanToolInc]

We do not. Dedtru makes great machines, but we don't have one.

[@garysmith9772]

I thought I knew "Glen" from somewhere, Back in the late 60's or early 70's there was a late night local TV show with the live host named Morgus or the Ghoul and played monster movies. Well I think Glen looks just like one of those guys, check it out.

[@alexkern9134]

I want to see the brand new Okamoto!! DROOL

[@markrichardson239]

You have the same afflictions as I.

[@SuburbanToolInc]

Thank you for your comment

[@forrestaddy9644]

THIS series I'm looking. forward to. In all my 50+ years in the machinist trade (which includes lots of poaching on the damn toolmakers) I have zero time on a gig grinder. Please, I know you love to have fun and yuk it up two jolly guys style but the humor can be very distracting - so exercise a little restraint. This series may form the basis for a noob toolmaker's basic instruction so consider your legacy. How much material do you have on the survey and tune up of your Moore gig grinder? That would be another excellent series. With your resources, desire to inform, and technical experience, you, Don Bailey have the potential to be as influential in the preservation of the lore of precision manufacture in your generation as Fred Colvin had in his. As you said early in this video, there are huge gaps in the available videos of precision manufacture.

[@cyrex686]

I liked the humor, too dry and you get bored.

[@joycethomas8868]

Just read your geometric tolerancing handbook for good examples