RING TYPE PART TECHNIQUE

This is a method I use to make multiples of ring shape plastic parts. The use of a programmable digital readout with multiple tool offsets makes this a easy operation.
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I am "robinrenzetti" Instagram lots more content there!

[@oxtoolco]

I want to hear the story about the block of wood stuffed into the Renzometer between the calibrated chopstick. There has to be a good story there. Talk to you soon. Tom

[@ROBRENZ]

I need to call you soon so we don't ruin the home shop machinist podcast. ATB, Robin

[@StefanGotteswinter]

Haha, the Renzometer-tease ;) Absolutely enjoy seeing you do "relatively normal" machining, lots of little things to pick up. Thanks for Sharing, Stefan

[@ROBRENZ]

That might be some "This Old Tony" wearing off on me. If you are still picking things up I must be on the right track. Thanks for watching and commenting. ATB, Robin

[@393strokedcoupe]

How dare you tease like like! 😉 PS: I have to say, you, Joe Pieczynski, and Tom Lipton have to be the most astute machinist I've had the pleasure to watch and hopefully retain even the most miniscule amount of you guys years of vast knowledge! Thanks to all of you.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@cooperised]

Agreed. Add Stefan Gotteswinter too though :-)

[@davidrule1335]

I have a 1943 South Bend 9A and a 1943 TREE knee mill that appears to be cobbled together out of surplus parts, (ya know we were at war). The stuff you and Stefan do amazes me. I like the longer format stuff too. Mr Pete is getting a little short but he's great too. The TREE mill has a collet closer, never had a cutter or straight 3/4 shank twist drill chuck ever slip.

[@piccilos]

the DRO is awesome, had no idea they could do that

Thumbs up for minimizing waste

[@eclecticneophyte2581]

I'm just a lowly old beginner hobbiest, but still eager to learn. Thanks for allowing us all to view your work and see your machining techniques! I always enjoy attending your classes! 👍👏

[@ROBRENZ]

You are welcome and thanks for watching and commenting.

[@EdgePrecision]

When I worked for Esco we did work for Nasa. one of the parts we made was out of some kind of nylon material. It was shaped like a channel about 40" x 1.50wide and 1" tall with closed ends. In order to machine the inside pocket on the Bridgeport mill we made a fixture out of aluminum that the part set down in. We made some extra parts and they got stored in the warehouse. About a year later they wanted the extra parts but with a design change to some of the features. I setup the fixture waiting on the parts. The parts arrived but wouldn't fit into the fixture. They had increased in length about 1/8" from absorbing moisture. We have a humid climate here in Houston. Great video I see some ideas that would really adapt to the CNC. Thanks. We normally waste the material and part off on a boring/groove bar. The bar catches the part. But the stock could do the same if I were to reverse the trepanning and part off tools. In fact I could do it between centers with a right angle shanked trepan tool.

[@ROBRENZ]

Thanks for stopping by Peter! I think that PET mandrel grew several thousandths. ATB, Robin

[@scrout]

I love the smell of precision in the morning...

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@billlee5307]

Once again you have offered a master class in how to go about making small lots of specialized parts. My days of doing this kind of work are over, but I want to thank you for taking the time to do these videos. Younger folks especially can benefit greatly from your approach to this kind of work.

[@ROBRENZ]

Thanks, and thanks for watching and commenting.

[@samstestchannel1141]

10 thumbs up from an all thumbs machinist. 18 years in the trade, and you help me realize I have only just begun. Thank you!

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@mongo6043]

I love watching all you Machinists do your wizardry, but you Sir, are by far and away the most genius mad scientist Machinist of all! I learn so much following along with your projects!! What madness is the Renzometer?!?! I don't even know what it is but I'm both fascinated by it and imagine it will revolutionize metrology?!? Thank you for taking the time to post your content Sir.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@than_vg]

I want to 'like' that video each time I rewatch it....

[@jonrbryan]

Where I work we used to have one of the finest full-service machine shops on earth. They could do everything, from microscopic to gigantic. Gone now, sadly, for lots of reasons. I used to love taking work over there, because there was always something interesting to see (if it wasn't too highly classified). Your videos have restored to me some of that vicarious pleasure, and the whole KZbin community of machinists has inspired me to stop just watching and start doing it myself. Fortunately, my wife is tolerant of my obsessions. Anyway, we used to have them make precision fixturing from PEEK. Appallingly expensive stuff, but sometimes nothing else will do. PET isn't cheap, but I like the way you make the most of your material, Robin. Beautifully planned and executed work.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@evanlacava9213]

Great work holding. I’ve used the same method in the past!

[@emilgajewski1371]

Keep' em coming, always a lot to learn...

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@MrJugsstein]

Simple elegantly Thanks Robin

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@tyhuffman5447]

I have got to go back through your video catalog. Stunning work!

[@ROBRENZ]

Thanks and thanks for watching and commenting. Don't miss the "Ultimate kelvin connection part 1" and part 2 and the "making kelvin banana jacks" There is a lot of interesting machining techniques in those. You will just have to suffer through the electronics aspects of them.

[@dominus124]

Thanks for sharing all those techniques.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@RGSABloke]

Robin, its happened again, my brain exploded and i had to go into the garden to retrieve whats left of it. As always, challenging, rewarding and interesting. Many thanks for sharing. Kindest regards Joe.

[@ROBRENZ]

Thanks Joe I hope there is some still left! Thanks for watching and commenting. ATB, Robin

[@DudleyToolwright]

I love all of the fixturing examples. Interesting and insightful.

[@barryweissburg6384]

Brilliant!

[@715sachin]

Good Technics Thanks to give ideas

[@ianmorcott3113]

Yet another master class. Thanks for sharing your knowledge.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@ckvasnic1]

Cool Video! Thanks for sharing your time and many talents

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@charlieromeo7663]

Another quality video Robin. I always learn something from you.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@MinhasA]

the Renzometer looks so cool! thanks for another awesome video!

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@3rcamera]

Very nice and well done. Thanks for sharing.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@kostasstamatakos1230]

Great lesson sir! Thank you.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@russtuff]

Very enjoyable to watch, and so informative!

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@louisnemick317]

Amazing video Robin.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@simonsaelaertfurniture9883]

Thanks again for taking the time to share this with the world. Very much apreciated.

[@ROBRENZ]

You are welcome and thanks for watching and commenting.

[@forrestaddy9644]

I'm gonna wait for the Renzo-Demo. I got my petty fault-finder set to "ultra nit-picky" and put fresh batteries in it. No pressure. Super demo on how to use the tool setting features and the advanced part programming available on non-basic DRO's. And also an excellent demo on how to not waste very expensive materials. It's been a long time since I bought poly-flouro-whatsit stock but it wasn't cheap; somewhere between inconel and silver per weight unit. No point to drilling a 2 1/2" core away to nothing. Trepanning the part away from the parent stock to a groove insures against wall deflections. Plastic bushings (I guess you could call them bushings) that skinny don't have to be round in their free state but the OD and ID has to be parallel. An alternative useful in thin-walled parts when the raw stock is furnished as a tube or a ring casting is to semi-finish machine OD and ID to the same stock allowance. Then turn/bore to dimension simultaneously using opposed finishing tools set to the wall thickness and positioned to cut the critical tolerance. Back in the day I quite often had to make bronze thin-walled bushings on a VBM. Using two tools not only ensured wall thickness but neutralized part deflection and chatter. PITA to set up but it saved tons of time in the long run.

[@ROBRENZ]

Remember this is just a rough proof of concept version (seriously). This was just to see if I was delusional or not and I am definitely not. But I am sure I can learn some things going through the petty fault-finder with fresh batteries. I have done the balanced tool trick in the past and I agree with your assessment. Thanks for watching and commenting. ATB, Robin

[@forrestaddy9644]

ROBRENZ Deviants to traditional methods are doomed to death by Monday morning quartebacking. It's the Rule: nothin can be changed. Innovation must be crushed lest we make progress. I've been thinking about your Res-O-Meter. If it wasn't for a fine opportunity to credit its inventor, I'd suggest calling it an "undulometer." Segue: Thanks for the tip for the Shars/Deckel grinding wheel hubs. I ordered four Monday last week and now have them in my clutches.

[@copasetic216]

Awesome, as always. Great demonstration of why it pays to sit down and think things through. Saved so much time and all that material. Thanks for sharing.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@exrallydave]

Always a pleasure watching a true craftsman! Thanks much!

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@zephyrold2478]

Hi Robin, Amazing as always, a good old handmade thumbs up to you.

[@ROBRENZ]

Thanks Zephyr Old and thanks for watching and commenting. ATB, Robin

[@jeffreylehn8803]

I enjoy the videos that you make , thanks for sharing your knowledge.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@jessemendes9491]

Thanks Robin , very Nice !

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@johnbodmer5645]

Great idea the way you mount spin dexer in the vise. Thanks for showing that Robin.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@BasementShopGuy]

What a great video Rob. Always learn something from the master!

[@ROBRENZ]

Thanks Brad, its tough getting videos out when your busy isn't it? Thanks for watching and commenting. ATB, Robin

[@ScottGMerritt]

Thanks again. Robin.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@markfulmer8501]

Robin- thanks for sharing

[@ROBRENZ]

you are welcome

[@Bassman73]

very useful, thanks

[@James-fs4rn]

Another intriguing episode as always. Really appreciate your mad engineering and manufacturing skills.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@EliteHydronics.]

That DRO features are great for hitting your numbers kind regards dave

[@outsidescrewball]

Great video Robin.....so many tips/methods shared....thank you

[@ROBRENZ]

Thanks Chuck and thanks for watching and commenting. ATB, Robin

[@MakinSumthinFromNuthin]

Always fascinating watching you work Robin :)

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@wallacesaan]

Another great video! Thank you so much for taking the time to film these videos, and more importantly, for sharing all the wisdom and experience you have accumulated. There is an ever growing treasure of machining (and other) content on KZbin that is a fantastic resource.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@SteveSummers]

Thanks Robin, I enjoyed the video. Nice setup👍.

[@ROBRENZ]

Thanks Steve and thanks for watching and commenting. ATB, Robin

[@bugrobotics]

Thanks for the lesson, I always enjoy watching your approach! Awesome to see the Renz-o-meter together. Thanks again.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@deemstyle]

That was so cool! The ability to take the chuck off and go right to the indexor was very cool!

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@AlHackel]

Really enjoyed the video, thanks

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@RBAERO]

Great technique!!!

[@ROBRENZ]

Glad you like it!

[@RBAERO]

@@ROBRENZ I think I can be make with metals too

[@GRMS_Ian]

Absolute joy to watch you working Robin. Thank you for that. Had to go sit quietly with an ice-pack on my head after beholding the Renz-o-meter :)

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@artmckay6704]

It's about the battle plan. Plan, plan, plan, then execute! Great planning! :)

[@ROBRENZ]

I hope so!

[@artmckay6704]

@@ROBRENZ :)

[@JBFromOZ]

another fascinating use of repeated operations to produce parts fast, accurate and with minimal waste. cheers again for sharing

[@ROBRENZ]

Thanks JB and thanks for watching and commenting. ATB, Robin

[@djberg3483]

Machining plastic, where it all started for me. Back when i was welding the stuff. An old bridgeport and very basic geometry, but that was the start of it all. Cant wait to see the surface plate data collection, and the lapping of it. Thanks again for the info.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@karlsorensen3214]

Thanks for another amazing video! For a newbie like I am these are like drinking from a fire hose, in a good way! Thanks!!

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@RRINTHESHOP]

Nice work setups, love the Renz-o-meter. Enjoyed.

[@OldIronShops]

renzo meter teazer video can't wait to see the completed tool

[@ROBRENZ]

Thanks Randy and thanks for watching and commenting. ATB, Robin

[@ChrisFiggatt]

Wow! Genius! I just never would have thought of parting a part from the inside.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@bob_mllr]

I love seeing how you think out the process. Very instructional. I was on the edge of my seat with the Renzometer tease 🤨

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@RaysGarage]

Impressive Robin, well done man!

[@ROBRENZ]

Thanks Ray and thanks for watching and commenting. ATB, Robin

[@craigs5212]

Great video, can't wait to see the super duper meter.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@jasonvanhalle]

As always Robin, I watch your stuff and come away with a ton of great ideas. That DRO of yours is worth its weight in gold, especially considering how many tools it can hold. Seems like the perfect setup for small-ish QTY stuff (or larger quantity stuff for folks who are actually patient, unlike me) that's just so much easier to do semi-manually than to program it all and set it up in the CNC.

[@ROBRENZ]

It is very handy but I must admit there are a lot of things that I do on the tormach now with conversational instead of the HLVH even on onesey twosey parts,

[@srp01983]

Glad to see you have just the same problems as I do with swarf wrapping round the work when you’re machining plastics!

[@ROBRENZ]

Yeah its a pain, Thanks for watching and commenting.

[@rodfrey]

I was trying to build a sterling engine 5 years ago and stalled at exactly this step. Thank you, I'll be digging it out again.

[@ROBRENZ]

You are welcome and thanks for watching and commenting.

[@michaeljarrett3059]

Thanks I just recently discovered your site and have binge watched almost all your videos. Your presentation ,sharing of your thought process and craftsmanship are truly astounding. I have throughly enjoyed every subject you have covered. I am very thankful you are willing to teach and share. I have spent the last 40 years building custom homes and I wish I knew back then a bit of what I have learned watching machinist videos the last few years. I thought I was a pretty good woodworker until I saw how an ultra fine craftsman like you works. Watching your great setup for drilling the three holes I wondered if all of the holes for all parts could have been drilled as a first operation on the cylinder? Thanks again for great videos.

[@ROBRENZ]

Glad you are enjoying the content. I have actually done them doing the holes in the cylinder first but it takes longer and is more prone to errors. Thanks for watching and commenting.

[@ottoreuter6279]

Thanks for another great video! Yourself and Rolingmetal are among my most anticipated Creators, despite (or because of) being at decidedly opposite ends of the precision spectrum..!

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@longlivepunk]

Great video as always, Robin! Most of my part-off rings have quite a bit smaller ID than that, but I'll have to keep that in mind. Especially for the pricier materials. Thanks for sharing the knowledge!

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@TomChame]

Very neat, thank you.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@warrenjones744]

Well described Robin, I like how you share your thought process on things. As others have pointed out it in the past is very instructional. Food for thought if you will.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@EliteHydronics.]

the master. thanks for sharing Robin kind regards dave

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@unknownapprentice625]

Always full of info and SOLID techniques! The Renz-o-meter looked much bigger in all your other posts, nice to see it in scale from that distance, appears much more meter-ish now. Can't wait to see it work. Thanks!

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@billdlv]

That DRO is slick for sure Robin, neat deburring tool from the x-acto blade.

[@ROBRENZ]

Thanks Bill and thanks for watching and commenting. ATB, Robin

[@886014]

Nice video as always. I liked the slotted keeper, I wouldn't have thought to do that and would have wound the bolt on/off each time like an idiot. My early Heidenhain is currently playing up, I've been looking at an ND780 for a while but didn't know they could do that programming. Very nice

[@ROBRENZ]

Thanks Pete, and thanks for watching and commenting. ATB, Robin

[@basemkhoja4498]

Very nice 👍

[@ZieselRocks]

The bottom of my jaw has a new indentation from hitting the floor. Thanks for making these videos!!

[@ROBRENZ]

Thanks, and thanks for watching and commenting.

[@akfarmboy49]

I like your ideas of internal cutoff,

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@mog5858]

thanks keep up the good work

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@armdaMan]

Hello there again Robin from deep down across the pond in South Africa Your methods, techniques, impeccable accuracy and execution are always spellbinding to watch and learn from, even at our age. As home shop and hobby machinists we can only marvel at the level of Accuracy U work with and achieve so casually. We never stop learning. Thanks a zillion for showing and sharing. Keep 'em rolling. ATB aRM

[@ROBRENZ]

Thanks, you are welcome and thanks for watching and commenting.

[@bostedtap8399]

Excellent and innovative, I was taught in my apprenticeship to bore out multiple washers, though it functioned better mainly in Cast/Chilled Bronze materials, but have never used the trepanning method. It's an honour to watch, and learn. Also like the larger diameter chuck key handles for ergonomics. Again, thank you for sharing your expertise.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@pierresgarage2687]

Hi Robin, Enjoyed the couple of new ways to get things done... ;) Cheers, Pierre

[@ROBRENZ]

Thanks Pierre and thanks for watching and commenting. ATB, Robin

[@ProfRonconi]

Fantastic technique! I'll be using it to make photographic filter rings. With the material savings I can afford to make them out of brass instead of aluminium.

[@ROBRENZ]

Thanks, glad you found it useful and thanks for watching and commenting.

[@Simon28298]

Nice to see the seal of the toolroom spindle B) Nice technic!

[@ROBRENZ]

Thanks Simon, that's not the seal for the toolroom spindle but it will be the same style. Thanks for watching and commenting.

[@tombellus8986]

Great video very interesting thanks for sharing

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@anthonyfieldthetrollbuster9930]

I've just deleted the compound on my Colchester Student and converted it to a solid tool post mainly to rid it of massive movement when parting which is successful due to your input but now I'm interested to see more detail on the facing and turning tool you use in this video. Many thanks for excellent videos.

[@ProfRonconi]

Ooooh, you reminded me of Colchester Lathes. I got my degree from the University of Essex, Colchester, England. Every time I took the bus I went past the Colchester Lathes site. It never crossed my mind that one day that fine factory would be gone forever. So sad...

[@ROBRENZ]

Thanks It is a C7 brazed carbide tool. diamond lapped 5 deg. clearance Thanks for watching and commenting.

[@matthewhickey942]

Thanks

[@ROBRENZ]

Welcome

[@routercnc9517]

Came to this channel from a mention by Stefan Gotteswinter. Glad I did - just subscribed, great work regards UK

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@bobolander]

dude SERIOUSLY??? trolled me hard with the Renzometer!!! Well played.

[@ROBRENZ]

Glad it worked! and thanks for watching and commenting.

[@anothermoth]

Seems like precision & compatibility gives the tools in your shop a total usefulness that is far more than the sum of the parts, maybe the product of the parts.

[@ROBRENZ]

Agreed, and always looking to add to that synergy. Thanks for watching and commenting.

[@bluedeath996]

Always learn something good in your videos. Please make a video on your self calibrating Renzometer.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@vincei4252]

LOL. Since I don't have or use Instagram I'd never heard of the the repeat-o-straight-o-meter. What a world we live in where a word salad is considered potentially "problematic". Nice work as always, Rob.

[@ROBRENZ]

I mentioned it on my Attention to detail #1 video. google straight o meter and you will see what I mean. Thanks and thanks for watching and commenting.

[@vincei4252]

Yeah! I see what you mean. smh

[@drummerhammar]

Heidenhain Positip, nice!

[@ROBRENZ]

Thanks for watching and commenting.

[@jimsvideos7201]

o.O Whole damn ocean full of brains right there.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@facundonunez2358]

Great tips for make production runs in manual machines. Also you talk above your Renz -o-Meter but still elude me how you measure parallelism with the tool

[@ROBRENZ]

Thanks, there will be a video on it and thanks for watching and commenting.

[@FredMiller]

I am betting Tom Lipton will be the first viewer on the Renz-O-meter. Great stuff Robin thanks for all the cool tips! Fred

[@ROBRENZ]

Thanks Fred and thanks for watching and commenting. ATB, Robin

[@PhilsProjects]

really great video. I was making some pinch coLlars for my tool posts. Im having a hard time with getting the 1/32" sliting saw (4" dia) to cut on centerline on the back side. I had knurled the od and im thinking it induced stress into the Ann 4140 I was using' It seems like a simple part, there are a few challenges like drilling & taping thru the od. Ill keep at it once me new mill is here and setup Cheers Robin. ATB

[@ROBRENZ]

If you are going to make a wrench like I showed and are making the collars I would do a 3/32 wide groove so the wrench ears would be thicker. IMO the wrench is the best part of the whole Idea. Thanks Phil and thanks for watching and commenting. ATB, Robin

[@PhilsProjects]

That would make for a stiffer blade also, thanks Robin

[@judge743]

Looking forward to more on the Renzo-Meter.

[@ROBRENZ]

Thanks and thanks for watching and commenting.

[@chrisj4570g]

Get to bed because I have to be up at O dark thirty, or watch Robins new video? I can sleep when I die. Can't wait for the Renzometer to be complete!

[@ROBRENZ]

Thanks Harold and thanks for watching and commenting. ATB, Robin

[@BuildSomthingCool]

Nice teaser on your new gage LOL

[@ROBRENZ]

Thanks Dale and thanks for watching and commenting. ATB, Robin