MAKING AN AIR TOOL CHAMFER ATTACHMENT

Design and construction of a chamfering attachment for a Dotco 60000 rpm air tool.
#practitioner_of_the_mechanical_arts
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[@ThisOldTony]

never thought I'd see the day... Robrenz cutting corners!!!

[@ROBRENZ]

The whole world is going to hell in a hand basket!

[@OVERLORD-ji2id]

My two Dads in the same place...

[@douglastedder1694]

wheels are really falling off...

[@SneakyMcBastard]

Less commenting more creating plz.

[@georgehill9353]

Dammit I just spit my coffee

[@DanielHeineck]

Robin -- you could ramble incomprehensibly for 30 minutes with no cuts and many of us would love it just the same. Your generosity with knowledge and problem solving is greatly appreciated.

[@StefanGotteswinter]

Brilliant design - Next a miniature routerbase for the Airgrinder to do contourwork? I am glad you put this video together, despite the pieced together appearance - It has so much information it it, it would be a tragedy not to put it out. Thank you!

[@ROBRENZ]

Thanks Stefan, I made the router base for it years ago and I do use it for contour work but this is much better for straight chamfers. I need to try it on hardened parts to see if the burr will hold up for a reasonable amount of time. ATB, Robin

[@zumbazumba1]

@@ROBRENZ Did you bought those burr bits ith ball bearings or are they home made(how if they are?)?

[@ROBRENZ]

@@zumbazumba1 I showed grinding the burr down to hold the ball bearing later in the video.

[@lrakschmidt2880]

Time flies - it was about 4 years ago I saw Stefan's YT clip on making a chamfering tool. See kzbin.info/www/bejne/g2nTfXicgL-satk I liked the idea of Stefan's use of an end-mill - which one to build?

[@SuperAWaC]

You really exemplify the saying: "To bake an apple pie, first you must create the universe"

[@sr20ser.]

"It's not a watch..." As an amateur horologist, I can tell you that your manufacturing is on par, if not better than most high-end watchmakers.

[@zachaliles]

If I had something like this I'd spend all my time finding things to chamfer. Fact.

[@kurtu5]

Not to knock all the other youtube machinists, but when I see a Robrenz or Gotteswinter video pop up, I feel blessed with an extra special treat.

[@jellyfishbones0]

amen

[@iiredeye]

I wish you worked with me...I would absolutely wear you out with requests for advice. You're a master of your art Rob.

[@jasonmichaels6660]

Great work as always!! And yes thank you for uploading the video... we are happy to get content from you, doesn’t have to be perfect editing 👍🏻

[@mattymcsplatty5440]

Watching those gorgeous chamfers is oddly satisfying. The perfect geometry of three corners meeting so nice......so so sweet.

[@TheFeller1554]

Just an absolute joy to watch, what I would consider, an absolute MASTER at work. It is appreciated showing the work and setups, but what I get the most out of is sharing your thought process as you go. This helps me to understand the work being done, but more valuble the application of the principals that translate to other projects. Thank you for taking the time to share. Your scraps are worth more to me than most people I watch cool tips.

[@adamwisialowski2003]

Can not get enough of your videos sir!! You are the man!

[@mattm7535]

I thought to myself “I wonder where ROBRENZ got those step up shims”... of course he made them. I never would have thought to use a surface grinder to hog material like that. Very cool and great job stitching the videos together. Thanks for sharing

[@barrygerbracht5077]

Beautiful what you can make for yourself with your skills and tools. I suspect that would be a few $1000 tool if I had to pay you to make me one. You will enjoy it every time you need to chamfer something though. Well done tool that is almost art. The explanation of the whole design and manufacturing process was as valuable as the tool (applicable to making anything).

[@ROBRENZ]

Thanks Barry!

[@beachboardfan9544]

Whoa never knew you could plunge cut with a surface grinder!

[@Goodwithwood69]

Some great builds on here mate, his mindset is like Yoda.

[@ehamster]

If your belt sander based tool is the Chamfer-Meister, surely this is the Chamfer-Mistress?

[@Jeremy-iv9bc]

I wanna be just like you when I grow up lol.

[@TechGorilla1987]

And my next 29 minutes have been allocated to this video. Coffee can wait.

[@ericg7044]

I just finished making my coffee so I'm good to go!

[@TrevorDennis100]

Amazing work, and the resulting chafers are beautiful. Totally worth the time it took to make the tool. You make me embarrassed to call myself a toolmaker. The only downside of this video was being taken back to unpleasant memories at the dentist.

[@RileyKnifeandTool]

Your attention to detail and problem solving are on another level!

[@rodneykiemele4721]

This is one I’m going to have to watch a number of times, Thanks Robin

[@Ujeb08]

Very Impressive! that is quite a time saver you've created Robin! The thought and work that went into your "Chamfer meister" is amazing. I hope The burr lasts for you.

[@JaakkoF]

15:38 you can do that on an ER collet too, but you have to have the same diameter plug at the other end of the collet so it squeezes parallel to the shank and not cockeyed which would mean no grip. Easiest is to make a few flanged plugs that you can insert at the other end, the flange holds it in place while you screw the collet in tight.

[@howder1951]

Great job Rob, I can see that design being scaled all over the map for hand chamfering, what a great shop tool, cheers!

[@TheTacktishion]

You are a machining prodigy....! Thanks for showing us WHAT YOU DO, and HOW YOU DO IT....! Keep the coming....!

[@shirothehero0609]

That is an amazing amount of work for that little monster, but damn does it look amazing and the results are brilliant. That's awesome Robin.

[@c4fishfood]

It is beautiful! Robin- did you track the approx. hours to design and build?

[@ROBRENZ]

Around 3 days work.

[@akfarmboy49]

I like the idea I like the design some of smallest tools are used the most. I follow every step. In making this tool. Now I need to REsort out my priorities. Thank you for making this excellent technical video. Now I’ll dig out my air grinder.

[@carltauber2939]

You and Tom Lipton must have done a Vulcan mind meld. He made a chamfering device and posted the video yesterday. Both amazing videos, thank you so much for making this video.

[@eugencsl]

Always wanted to build a deburr tool, doing a looot of deburring, now i pretty much have a plan how to do it. Thx a lot mr. Renzetti, you are a true master 🙏🏼

[@Beanpapac15]

Holy cow, I wish I could buy one. This tool would be such a time saver.

[@MikeBramm]

This looks like the prototype for the new Renzetti Machinist's Router. Available soon at a tool dealer new you. 😉

[@matthewperlman3356]

Excellent design and very useful tool! That would definitely sell. I would certainly recommend considering a CNC run, providing the air tool used is still readily available.

[@2dividedby3equals666]

Thanks so much for taking the time to piece this video together!! So much great information from a single project, you really are a Master!!

[@ROBRENZ]

Glad you enjoyed it!

[@EdgePrecision]

Another great idea and video! I may have to adapt this idea to one of my NSK grinders.

[@ROBRENZ]

You should! Thanks for watching Peter. ATB, Robin

[@hasanzakeri8708]

I loved how the three chamfers intersected!! Any chance for a short video on how you lapped the threads? BTW, I rather watch these “pieced together” videos all day, than no video ;)

[@ROBRENZ]

Possibly!

[@dgoode-ys3nx]

Pure Genius! Thanks for the tour.

[@robertwatsonbath]

Many thanks Robin. Thanks also for the free Solidworks modeling tip! I usually use circular extrusions dimensioned by equations, but I can see the benefit of the revolve in some circumstances. I think that's more a Renzetti precision grinder than a Dotco now ;)

[@user-tw9io9nz2m]

Absolutely loving the regular uploads!

[@Ihorecek195]

when Robin sais "Not professionaly done", than dont belive him. He arranges chees and meat on pizza :D Well done Rob. I hope you start your product series ASAP, no doubt that your products will sell. Enjoyed the podcast and waiting for next videos. Ihor Hudyma

[@first_namelast_name4923]

Thank you for taking your very valuable time to let us look over your shoulder in your shop. As always, full of tricks and valuable insights. I do follow your Instagram (and Stefan Gotteswinters), so this was not entirely new, but still very interesting to watch.

[@saschaoswald480]

Just fantastic work! I love how you casually made your own tiny collet as if it was no big deal!

[@ROBRENZ]

Thank you very much!

[@2lefThumbs]

That's a great idea, reminds me of Stefan's bench mounted chamfering tool, but great to be able to freehand👍 As an aside, as a Brit, it's comforting to hear that you pronounce the "ch" in "chevron" like we do! (We pronounce the "ch" in "chamfer" the same way - same thing goes with "chassis" neither is "right", just making observations 🙂)

[@patricksworkshop6010]

Stefans tool was based off of one of robins original idea

[@2lefThumbs]

@@patricksworkshop6010 a detail I might have overlooked or forgotten👍 He's stepped it up in collab with his son though, great work here

[@tjejojyj]

Excellent tool. Fitting video. Think the most impressive part was to see how you anticipated potential problems and designed the tool to deal with them. Instead of having to go through generations of prototypes you completed a fully functional tool first time. Wisdom and craftsmanship. Kudos to your son for the idea. I would hazard a guess that observing you work opens the imagination as to what is possible. It seems like a self evidently good idea; but why did no one else come up with it? (Maybe they have tried and failed?)

[@francisrampen9099]

I can't tell you how valuable your videos are - just awesome content.

[@chronokoks]

Awesome chamfering tool and your absolute precision approach is insanely satisfying. For micro fillets I use a hard #400 grit polyurethane rubber (infused with grit) die grinder cylindrical tools.. can't remember where I bought them (come to think of them, I never saw them anywhere else than at that glass artists shop) but man it's so easy to make delicate shiny small rounded corners on all your precision parts. Sort of like cratex, but higher grit and larger diameters + much much cheaper (cratex products are criminally expensive).

[@akfarmboy49]

chronok good info

[@youcoulduseit7492]

Real nice tool geometry and fixture design in one example .you are so thought prevoking . Thanks content qaulity and cinematography two different things If the content is good you could do it in your long johns , woulde'nt complain about anyone trying to help me and you and the community on youtube just wow . making a toolpost grinder with a coolent trough thinking 2- 1 gallon lab jugs the level switch trips the spool valve and presurizes the other jug the old feed jug becomes the return spool valve

[@AJR2208]

You're a very clever man Robin. Thank you for your inspirational content and processes. I can't help but wonder if this is a silent challenge for Tom (after his recent videos). Stay safe and well :)

[@johnjohn-ed9qt]

I saw this video and the question went through my head: When they skype, do they sing "anything you can do, I can do better"?

[@ROBRENZ]

Definitely not a challenge!

[@AJR2208]

@@ROBRENZ Lol :)

[@braxtonec]

Thanks for making this video. I assure you whatever you think was missing did not detract from the thoroughly educational standard you've set out to deliver. What great execution of a great idea. Kudos to the Renzettis!

[@bcbloc02]

All these videos tell me I need a grinder to do stunt grinding on and a bunch of diamond wheels. 😎 Will have to keep my eye out now!

[@ROBRENZ]

Thanks for watching Brian! Yes you need a stunt grinding machine. ATB, Robin

[@slausonm]

This was an awesome video, but when you mentioned it was your son’s initial idea, I was excited to see him build the tool. I am not saying I was disappointed, because I always learn from your videos but seeing a build from your son would have been extra special. Thank you again for a terrific learning experience.

[@cavemaneca]

I do a fair amount of 3D CAD work, and honestly the trick with including the extended features in the revolve then cutting them back later would have never occurred to me. It makes perfect sense when you consider order of operations while machining.

[@dauber1828]

Like always a great video thanks for sharing sir and thanks for your son for a great idea

[@yawpaw9796]

I wonder if the boi has some kind of inventive nature and voice

[@strangefruit8776]

In all seriousness though, I know you like to be humble but you have a gift for coming up with this stuff. The rest of us just bang our heads against the wall wishing we could think of an answer to a problem and you blow it out of the park every time.

[@jsteifel]

Robyn is both a machinist and an engineer, There's no doubt that he engineers.

[@strangefruit8776]

jsteifel I hadn’t heard him speak to having an actual education in engineering but I agree he’s very well versed on engineering or at least it appears that way to a regular guy like me. He’s very methodical and picks up very well on subtle characteristics. My cousin worked at American Airlines doing some type of assembly and he and I were just talking about how he was paid a substantial amount multiple times through their “good idea” program. It got me thinking if a Robyn R. or Tom L. worked there they would be rich. One of the bigger payments my cousin received was for simply telling AA that they were testing these high dollar engine mount bushings at way too high of pressure and they were destroying thousands of dollars worth of them like every other day. It turned out that they were testing them at like 300,000 lb when they never saw more than like 30,000 lb in under load. That got him a $50k check.

[@jsteifel]

@@strangefruit8776 I don't actually know that he has, but he clearly does the math, and engineers evertything he does. He is not just a machinist , or fabricator. He definetly engineers. Much better than some engineers.. because he also knows what it takes to get it done. Where some engineers come up with an idea, but no clue how it can be accomplished.

[@joecnc3341]

Thank You - for putting this and all of your other videos together. Your work is second to none. However you acquired your machinist skill set - we should look at that and model some training programs. Please keep the videos (and the knowledge that you are attempting to pass down) coming

[@tnekkc]

This video is above my pay grade.

[@jessebob325]

I'm watching this now so I can learn. When the zombie apocalypse (ZA) starts I'll do my best to carry on this knowledge. (I assume the internet will be down shortly after the ZA starts.) 😖 Your hands tell volumes. #salute

[@SteveSummers]

That's slick Robin. Thanks for taking the time to make this video.

[@ROBRENZ]

Thanks and thanks for watching Steve! ATB, Robin

[@bobstermer7058]

Evert time I watch one of your videos on KZbin or look at one of your instagram posts, I’m inspired by the universal precision you achieve in your work. If you are looking for ideas, I’d love to see a review of your Roll-in bandsaw. I’ve seen a couple.of teasers on instagram, that just lead me to wonder what else has been done to improve the precision of the saw? Keep it up, hou are educating a whole new generation of machinists, myself included!

[@SpencerWebb]

Excellent design, great lessons. Thank you, Robin!

[@kevinreardon2558]

That's a tool to manufacture. You could make it out of plastic and sale millions! Actually at first I thought it was way too expensive to make, but when I saw it in use, that paid for the development.

[@AlmostMachining]

Amazing build Robin! Thank you.

[@kundeleczek1]

You are a Master !

[@fredgenius]

Man I've got so much to learn! Thanks!

[@ftownroe]

Once again NASA level engineering and workmanship used to implement a simple concept.

[@TheKnacklersWorkshop]

An enjoyable video Robin... Thank you...

[@ROBRENZ]

Glad you enjoyed it

[@mathankumar6473]

Thats an amazing tool to have. Might build one for myself. Thanks for the influence robin

[@TheTsunamijuan]

Great design, and the chamfer quality is gorgeous !

[@AmateurRedneckWorkshop]

Very handy tool and looks well built. Thanks for the video.

[@cylosgarage]

Perfection as per usual

[@miguelcornejo8679]

That’s awesome. 👏

[@tmurray1972]

Outstanding work as usual.👌 Thanks for sharing your mindset on things.

[@FCleff]

Brilliant! Thank you.

[@mugsymegaton3769]

Super fine precision work as usual, I enjoy watching, thanks!

[@timmallard5360]

Out Standing!!! My engineering amdachinkng brain has been collecting dust since my daughter was born! Id rather have more videos than super audio quality. I followed every step👍

[@George-bb9yi]

Love it - thanks for sharing!

[@MrRShoaf]

Very cool. You the man!

[@Volcker1929]

Great video, thank you for posting.

[@LarrysMachineShop]

Man!!! Amazing idea, Rob, you are the best by far at at of this intricate stuff. You are a a Meister teacher too

[@westweld]

"That was free".....that was awesome

[@bikefarmtaiwan1800]

Super idea - excellent execution. It will be enjoyable to watch this through a few more times to catch the small details you miss first time ! Quite an inspiration- well done Rob.

[@damienmiller]

That tip about modelling cylindrical parts as revolves was worth it alone

[@woodscreekworkshop9939]

Love it!

[@taystew]

great video man. i love the almost clinical nature of your workflow

[@2lefThumbs]

Why did you ssy almost? :) (rhetorical question)

[@Rabb865]

I learnt so much from this thank you kind sir 🙏

[@taogotos]

So satisfying. Made my morning.

[@ROBRENZ]

Glad you enjoyed it!

[@spinyheghog]

Awesome little tool

[@urrick33333]

awesome build!

[@ROBRENZ]

Thanks!

[@BernardSandler]

That was like watching a symphony craft its own baton. What a remarkable set of processes to create an unbelievably apt new tool. Enjoy its use!

[@ROBRENZ]

Glad you enjoyed it!

[@ericnichols8995]

I came hear from Stefan's channel. You should send him your "gauges" so he can scribe the sizes on them.

[@RRINTHESHOP]

Awesome new tool Robin. Very nice finishes.

[@ROBRENZ]

Thanks Randy and thanks for stopping by. ATB, Robin

[@MCEngineeringInc]

Amazing work! 👍🏻👍🏻

[@ROBRENZ]

Thanks for the visit

[@nickolaguez]

Rejoice! Excited for little tricks n tips!

[@mikeschiavone3622]

I tried to make a ghetto one of these a few years ago with harbor freight pieces. In my minds eye it worked like yours 😁in reality i couldnt get it to ride the edge and not grab erratically.

[@theDisasternauts]

Beautiful tool! I love the design insights that you share with us -- always providing the thought process and desired outcomes behind each step.

[@ROBRENZ]

Thank you very much!

[@mr.t.807]

Fantastic Job

[@johndilsaver8409]

Thank you for posting this, it's inspiring.

[@ROBRENZ]

Glad you enjoyed it!

[@moms762]

I love this, and I’d love to have some plans to make my own. I have a chamferring machine now, but one of those looks really handy.

[@chasedewing5308]

This is fantastic! Now make a V-block version for cylindrical parts!

[@glennfelpel9785]

That was great, and I like your view on modeling cylindrical parts. One feature for the body versus several or many features to get the same outcome and I agree with you it is easier to edit it. Also this project is is genius. Thanks for the many tips along the way and for sure don't worry about any such details like video or audio quality we like the content quality which is awesome!

[@longcaster]

Bravo, sir, good idea made in fine detail.