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(AD FREE) The Radius Fixture That Got Way Too Complicated (Patreon)

Published:
2023-06-08 14:00:06
Imported:
2026-06
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Content

You saw me design it last time, so now it's time for the build. The quick change radius fixture is officially underway and let's just say, things got a little sticky 😉 

Enjoy!

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PATREON - The Radius Fixture That Got Way Too Complicated

Machining rounds on part corners presents a dilemma (to me anyway). Either I lug out my massive rotary table then spend a significant amount of time setting it and my parts up on the mill. Or I just quickly free-hand grind them on belt sander and live with the imprecision. So I’ve decided to make a tool that is the best of both worlds. A rotating fixture plate that is fast to set up, but also precise! But of course it doesn’t stop there. Being the engineer that I am, I couldn’t resist including a ton of extra functionality. If I’m taking the time to make the tool, might as well do it right, right? At any rate, the scope of the project might have gotten a little out of hand… and I might have had to come up with some shortcuts just to save some time. I’m not saying there’s super glue involved… But I’m not saying there isn’t either, #inheritancemachining #machineshop #hobbymachinist Patreon (Early Access + Ad Free + Drawings) - https://www.patreon.com/inheritancemachining Drawings Store - https://inheritancemachining.com/?product_tag=drawings Merch: https://inheritance-machining.myspreadshop.com/ Instagram - https://www.instagram.com/inheritancemachining/ Website - https://inheritancemachining.com/ Amazon Storefront (affiliate links): https://www.amazon.com/shop/inheritancemachining Thank you again to the Micrometer level Patreon members listed at the end of the video! TIMESTAMPS 0:00 Intro 1:10 Scope Creep is Real 2:13 Inner Peace 3:28 "CA"n you handle it? 7:04 Improvisation 9:53 Powerfeed is my Friend 12:04 Swiss Cheesen' It 14:36 Keeping It Centered 16:32 For Smoothness 17:55 Economize! 20:05 VEEry Nice 21:59 Dissimilar Materials 23:33 What's Next? FAQ Drafting Equipment (affiliate links): https://amzn.to/3P0HvMe A/V Equipment (affiliate links): https://amzn.to/3Pi45jB Editing: Final Cut Pro X Intro Song: Way Back Way Back When (Instrumental Version) - Gamma Skies https://www.epidemicsound.com/track/SQxEhTVi9I/\ https://youtu.be/ajXxJ_6KeE4 © 2023 Inheritance Machining, LLC. All Rights Reserved.

Comments

Jeffrey Spoor

I just got my notification, I anxiously await your posts and watch them as soon as they're posted. Very excited

Drokles21

At this point you actually need a cad model to tell weather or not something will be too complicated Brandon 😅

Michael Faragher

I had many thoughts, since I'm usually so brief, right? I re-watched the drafting video yesterday and had a moment of terror seeing all those edge-on tapped holes. It's actually telling that all those drilled and tapped holes are not only just work to get done, but you found tools to improve your process. The scope creep label coming up the screen is just perfect. We all know that issue. It's great to see all the old projects come back. Seeing a tool you made in use means that you needed that tool. It's a little thing, but it's great. The PPE and turning something on with a stick brings back memories. I've used "Well, I was pretty well armored, I figured I'd be fine" as an excuse too many times. Even the kerf of that Delrin made my wallet cry a little. I like how you specified the gauge pin measuring method but lacked those pins. Was this an oversight or a "I've got some mills, that'll do?" Amazing work as always. A tool that'll last generations, and be very, very confusing out of context.

Inheritance Machining
>>110297002

😂 You know... maybe that's one of the benefits of drawing designs by hand. If I used CAD I could probably guarantee everything would be far more complicated than it needs to!

Inheritance Machining
>>110299630

😂😂 Thanks for the laughs! Gauge pin's are one of the few inspection tools I don't have, but have gotten accustomed to using mill shanks. I like to think about who will see my creations one day and just wonder "what the hell...?" 😂

Erik D. Radzius

Oh man, so much to unpack here! I've had a not-so-insignificant sports injury about a week ago, so rewatching your content has been an absolute god send, and this just put the cherry on top! A slight note from my own personal experience - when I wrote my dissertation on using cyanoacrylate for machine workholding(just rolls off the tongue, I know), my findings were rather surprising - the depth of cut you can take on such a workholding fixture are significantly larger than one might think(assuming you do all the correct steps, such as acetone, blue tape, etc), and after I actually finished it, I went back to see what would happen if you pushed it past it's limits. Now, admittedly, I was running a 3" diamter aluminium bar for the tests, so not quite a direct comparison, but when the glue bond actually fails, it's far less catastrophic than you might expect. Unlike running a lathe tool in at stupid speeds and breaking something, when the glue bond fails, the part just falls down, instead of launching itself straight at you(similar to what happens when you finish a cut using the parting blade) Not that I advise doing this, but just some food for thought should you use this method again. Obviously being biased, I think it's an absolutely brilliant method, and it seems like it worked wonders for you here, Brandon. With that tangent out the way, I must once again commend your craftsmanship - the semi-finished result looks incredible. I can only imagine the amount of satisfaction that comes from putting something like this together, and I can't wait for the next episode. Keep up the amazing work. P.S. - the This Old Tony reference to changing chucks was absolutely brilliant 😁

Dennis Shubitowski

Beautiful build so far! I did not think the SuperGlue thing would work and thought a metal disc would be flying, but there you go - nice!

Ralph McCoy

What make and model is your lathe? I first seen Chris from Clickspring do the super glue set up. Of course your parts might be a tad heavier. Ralph

Inheritance Machining
>>110303509

You know... thinking about some of the mishaps I've had on the lathe, I think you are right about it not bing very catastrophic. I recently had that trepanning tool incident and the part just fell down into the chip tray after being yanked out of the chuck. I think the inertia of this one just scared me haha 15lbs spinning at 1200rpm! Anyway, thanks for the insight and for sending along that dissertation a while back 😁 And thanks for the kind words as always!

Erik D. Radzius
>>110303509

Oh, for sure. It's only sensible to be slighlt apprehensive about such a mass rotating at that speed. If anything, it's much better to be cautious than bold. Like I said though, the analogy of a parting tool finishing a cut is quite accurate, because the surface area of the glue actually holding the workpiece, compared to a chuck, is actually very small, so assuming the workpiece doesn't get caught on the chuck itself, it's relatively safe. With the wonderful gift of hindsight, I'd probably go back and do some more scientific testing on my dissertation topic, but as I said to a friend of mine yesterday - I'd rather use 80 sandpaper as TP for the rest of my life than go back to uni 😂

James Riordan

Love the super glue technique - will adopt this myself. One question I do have is a recommendation for quality chamfering bits - my three sets are consistently wretched, although the zero flute is less so - slightly. Anyone, please feel to chime in on this - chamfers do indeed separate us from the beasts and, well, I’m feeling a bit like that hairy fella skulking around the forests of Oregon !

Inheritance Machining
>>110399355

Thanks, James! I can't speak from long term experience, but I recents got (and used) and solid carbide 2-flute chamfering bit made by Ultra-Tool. Made in the USA and so far I'm very pleased!

Kyle Wellman

I can't believe the super glue held like that for the size of the work. I can understand doing smaller work or lighter materials like Clickspring, but a giant piece of steel round stock?? I could feel my blood pressure rising as I watched, I can't imagine what it was like for you turning on the lathe (even with the tailstock up against it). After you took the tailstock off though, oh boy I thought for sure my heart stopped lol. It's one thing for it to hold the stock, but also not budge even during the machining. I'm beginning to think buying a 4 jaw chuck won't be necessary and I'll just start super gluing everything.

Inheritance Machining
>>111799424

It's even more mind blowing when you consider it's actually just tape holding it all together. But the surface area to weight ratio in my case was really large. Someone over on the video comments went into the science a bit about how adhesives are EXTREMELY strong against shear forces, which is basically how all my cuts were loading the part. At any rate I'm as impressed as you haha And yeah you can get by without a 4-jaw for a lot of things this way