(AD FREE) The Radius Fixture That Got Way Too Complicated
Added 2023-06-08 14:00:06 +0000 UTCYou 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 π
Enjoy!
Comments
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
Brandon Sander
2023-07-07 02:12:45 +0000 UTCI 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.
Kyle Wellman
2023-06-29 18:33:24 +0000 UTCThank you - on their site now !
James Riordan
2023-06-17 00:02:50 +0000 UTCI use my center punches as gauge pins ππ»
James Riordan
2023-06-17 00:02:17 +0000 UTCThanks, 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!
Brandon Sander
2023-06-16 23:56:57 +0000 UTCLove 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, Iβm feeling a bit like that hairy fella skulking around the forests of Oregon !
James Riordan
2023-06-09 22:52:13 +0000 UTCOh, 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 π
Erik D. Radzius
2023-06-09 14:13:54 +0000 UTCThat was the only thing that scared me about it haha I have an early 90's JFMT 360. Basically a rebranded Mazak Mate
Brandon Sander
2023-06-09 14:09:57 +0000 UTCMe too haha but I have more confidence in the method now π Thanks!
Brandon Sander
2023-06-09 14:08:57 +0000 UTCYou 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 π And thanks for the kind words as always!
Brandon Sander
2023-06-09 14:08:15 +0000 UTCWhat 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
Ralph McCoy
2023-06-08 23:16:20 +0000 UTCBeautiful 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!
Dennis Shubitowski
2023-06-08 18:43:53 +0000 UTCOh 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 π
Erik D. Radzius
2023-06-08 17:52:13 +0000 UTCππ 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...?" π
Brandon Sander
2023-06-08 17:03:06 +0000 UTCπ 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!
Brandon Sander
2023-06-08 16:57:20 +0000 UTCI 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.
Michael Faragher
2023-06-08 16:55:09 +0000 UTCAt this point you actually need a cad model to tell weather or not something will be too complicated Brandon π
Drokles21
2023-06-08 16:16:18 +0000 UTCπ Always glad to see you here! Thanks Jeffrey!
Brandon Sander
2023-06-08 15:14:10 +0000 UTCI just got my notification, I anxiously await your posts and watch them as soon as they're posted. Very excited
Jeffrey Spoor
2023-06-08 14:06:15 +0000 UTC
