The Craziest thing I’ve done to my Billet 4 Rotor. It was running fine…
ฝัง
- เผยแพร่เมื่อ 14 ต.ค. 2024
- I take on the most ambitious work I’ve ever done. This isn’t clickbait I never post titles like this. I need you to understand how terrifying it was
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26th!
That’s what she said…
Seems like its the fabrication father 🤨🤨
fab daddy uwu
@Fabrication Father gold or white ?
@@catxx5480 7
As a machinist, and machine shop owner be careful assuming that drilling is better than running endmils, drills walk and the longer they are the easier it is for that(that's also why there's different angled drill bits along with different flute and styles of flute). I'd recommend running a collet like an er32 holder instead of that drill chuck you will see better results with holes and can run them faster as it's more ridgid being held in more points. Just a recommendation for if you ever get into tight tolerances.
long drill =wandering drill...i always use the shortest drill possible for each application ,then interprolate the hole to size with the correct,most rigid endmill for the material im cutting or use a boring head set to size..ps: never use a drill chuck either unless you dont care about what you are machining
I was just thinking the same thing, you want your tooling as short as possible to avoid walking and runout. Great to see this process Rob!
Also when proofing whatever youre machining it's always good practice to handwheel the program that way you avoid crashing and eating endmills tooling. Likewise before starting your cut handwheel to make sure all is good
He actually did a whole video a few months back on wandering drill bits
Free info from a player in the game...respect
Rob Dahm is like a mad scientist, but his Frankenstein is the rotary motor. I'm loving this technical content keep it up.
In the book Frankenstein is actually the scientist. What's commonly referred to as "Frankenstein" is actually Frankenstein's monster.
th-cam.com/video/teDiLU9Ry44y/w-d-xo.htmltt4
The monster has no name, its creator is called Dr Frankenstein.
Dr Dahmenstien
@@freakysteve140281 😂😂
That noise you refer to from the tools is called Chatter. It's hard on tools and ruins the surface finish. Most of the time this happens due to improper programming and the rest of the time it's a tool problem.
I never got a good look, but it almost looks like you are running a 5 flute end mill (common for steel and harder materials). Aluminum is really bad at gumming up so a 3 flute would help.
th-cam.com/video/teDiLU9Ry44t/w-d-xo.htmlttr
chatter is caused by your programming not matching the rigidity of your setup, less cutting edges will help the finish a lot, or he can switch to something like a sandvic 390 holder with square light cutting condition inserts
Yep. A 2 flue works best IMO. And seems the most commonly available, but I’m a hobbyist so that’s just my experience.
Also could be because of the coating, you aren’t supposed to run tools with coating on aluminum, they gum up.
IIRC chatter happens cus your feed/speed makes the endmill resonate/vibrate
Since you have the machine to do it, I think you should build a new intake manifold, but make it billet and integrate the fuel rail directly into it, so it's all a single assembly between intake air and fuel. I have the billet exhaust manifold from dieselpumpuk for my om606 in my C10 pickup. Its a work of beauty and flows better than all the previous manifolds i tried, because its already ported perfectly via computer ai testing of flow.
You should billet nothing else only billet 😂
Heat sink….
I'd love to see that truck tbh.
@@mostlymotorized boost and high fuel rate makes people do weird things man...
Rob. Life is just a bunch of "In theory this should work." Moments. But without actually attempting it we would never know what was possible. Stay true to yourself you absolute beautiful nutcase.
Win or lose, succeed or fail, the learning accompanies the attempt. Thanks for this comment!
Yeah he's not building rotaries, he's literally making them. The fact that he's dumping all this quite valuable content to us, shit he coulda setup a doweling and porting business by now easy, not told us ANYTHING as to how its done and charged a hefty price for a rare service. "Mad scientist Rob" is best timeline, doing it because it can be done
The only pro of getting covid so far is being able to spawn camp these videos as they come out lol
Hope you feel better soon!
Haha that’s a positive! Hope you get better soon!
No kidding. Early af
Spawn camp 😂
@@RobDahm positive… nice one
"You want to go down to the bottom of a hole, and use as much of the hole as possible."
-Rob Dahm 2021
Holy Sh*t Rob has really stepped up his game! Fenders , new primary injectors ...
I see a new harness in your future !
Brother Rob, you have come a long way since I met you. Congratulations my friend. I think we can all learn a lot from watching you!! Thank you for this public service!
Bro real fans won't leave u if u trash the 4 rotor but we will let u know u f'd up u, love ur videos bro , keep up the great work💪🏽🔥
I'm half way through so I'm shook lol
If he f's it up, then naturally we just expect him to reconstruct it from billet.
@@tippyc2 Soon he'll be making his own billet parts
@@JohnWiku Soon™
th-cam.com/video/teDiLU9Ry446/w-d-xo.html65
Love the progress and advancements you're making for the rotary community.
Would love to see a reaction video from you on the new Liquid Piston Rotary Engine!
th-cam.com/video/teDiLU9Ry44y/w-d-xo.html6yyy
So hyped every time I see you upload, you’re a huge reason as to why I’m looking to buy and build my own rotary. We love you rob❤️
13:14 - You can actually use a "bottom tap" in the normal 4 flute straight ap style. I have a few sets of taps, and they are super handy. I drill the hole to 6.8mm for M8, then go through all 3 taps to create threads all the way to the bottom.
Just another one as not everyone in the comments might be aware, great work as always and I'me excited to watch and see the results of the changes you've made :)
Yes, I was going to say, you get the square taps in starter, intermediate and finishing. Looks like he had intermediate taps.
G'day from West Australia, Rob😉
It's a joy to this old engineer ,watching your imagination run wild and creating fun additions to a fun motor.
Never give up that buddy!!!!!!!😉🙂👍👍
Im in West Aus also🇦🇺🍺
Hedland ere
"For me, 3 and a half inches is deep"
Brag to all of us why don't you
🤣🤣🤣
Exactly what I was thinking
For the straight flute taps, there are also different types of taps- the regular kind, (as show in the video) which takes a small amount of torque to use, and there are also taps for bottoming out threads in holes which start cutting the full thread after only 1-2 threads. (but take more force and don't last as long, similar to the spiral tap)
The advantage of the spiral tap is that it is a bit physically stronger due to the spiral and it also forces chips out much better. Also, because it is more expensive, it becomes cost effective to make it a little more expensive and make it out of higher quality material and put some good coatings on it.
I used to work in a machine shop and as much respect as I have for the amount of work that occurred to make this video possible, I wish it was in a playlist with 30 more to watch
19:41 Rob quote of the day, 'right now, what we are doing is deep plunging, and for me deep is 3 1/2 inches'... Thank you for your honesty Rob, we can all learn to embrace whatever tools God gave us! You are a true warrior!
I work in manufacturing and engineering for a small aerospace company and the amount of work that goes into what you are doing is so much more than you show and it’s wildly impressive what you choose to do and you really are the only one doing that, props.
I'm never going to own a rotary but man do I love watching these tech videos rob puts out
I have a career in IT, but I studied mechanical engineering. It is still my passion and I like to get as much time in the garage as possible, but it gets harder to find the time. Robb, your vids are so full of content and enjoyable to watch. The builds just keeps inspiring. Just want to let you know bro.
Really impressed with your creativity throughout this build. Very happy to see it pay off and how excited you are even when it doesn’t. Everything is a learning opportunity!
Can feel the brothers excitement again..
Back in the 4 finally..was worth the wait..when this science experiment hits the pavement at its best.. you will blow the world away with its performance
Rob has far surpassed the average TH-cam build channel and has become his own R&D facility for an entire community of car enthusiasts. Legend.
I love seeing this early cnc stuff. Most of the time in part development, you don't get to see the first iteration. Can't wait to see how those fuel rail pieces evolve over the years to add lightness and mechanical aesthetic.
Confirmed mr crabs is feeling it
Amazing video. Can't wait to see the 4 rotor back up and running!
Rob you're on another level I can't believe this is the same channel I stumbled upon in early HS 10 years ago when I was first going down the car wormhole wondering rx-7 reliability. Just wow!
LOVE the fact that even any little nuances you suffered you had a positive attitude of the challenge... IMPRESSIVE work !
Damn Rob, i have to give it to you that these injector holders are looking awsome. I love how you progressed so much with the CNC milling machine. You are a real part of the game now with making your own parts and being totally clear about it.
THIS THIIIS IS WHAT THE WORLD NEEDS TO SEE. People have given up on rotaries bedore they could even get close to their peak.. so thank you for not only believing but working and showing us your beautiful engine. Youre a true inspiration.
This is what we love you for!
Not just customising a car. This car is a engineering piece of functional art that we get to see/watch how everything was built, why it was built that way and the expenses, tools, research, mistakes, blood, sweat and tears of building it. 99% of the car is 1 off custom parts, that have been customised again to get the absolute maximum potential.
These videos lately have been such a sweet blend of: chill ass music, informative and visually satisfying content, and good humor. Pls keep it goin!
Best video in 6 months. Had 4 rotor, good music, and you actually go something done. So refreshing.
The straight flute tap you're showing is a number 1/ starting tap. Its conical to help you make the threads straight. You can get a bottoming tap to finish a blind hole ;)
This make sense, even with the 3 rotor the idle is complicated and I haven’t thought about it, of course I hope the injector placement doesn’t interfere with the airflow
Super impressive what you’ve taught yourself. As a mechanical engineer myself I still chuckle at some of the things you do and say, mega entertaining.
19:00, rob look into HSM processes for these kind of parts, they are way quicker than the regular step down/multi pass, I don’t know what kind of program you use to program parts however I do know 7 minutes seems way too long for that kind of part, also I highly recommend you use FS wizard for your speeds and feeds etc, it seems like you haven’t quite mastered the tooling aspect of machining, FS wizard is a great tool granted you turn down the parameters by like 20% as it tends to run the tools on the ragged edge of their capabilities, especially on cheaper machines. It also recommends the tooling to be used example using a 3 flute endmill instead of a 5 flute for alu etc. Really cool seeing the progress, It’s cool seeing how you’re going about this as this has been one of my dreams for a while. Quick tip for alu don’t run coatings on the endmills they tend to jam up the tool.
As a young doctor, Rob is the epitome of how I feel about learning. He's completely out of his element, and I could feel the tension he felt when watching the machine do it's thing. It's an inspiration every time I watch, because it reminds me that I can do this shit too, if I just put in the effort. Thanks for the great video, once again
13:06, rob from my experience in machining you aren’t using the right tap for the job, you were explaining how the taps you were using are not allowing you to tap the whole length of the hole, these square taps you are using are for starting the thread, they are taper taps, I.e they have no treads at the beginning to easily start the thread and as you go deeper the later fully formed threads do the work, this way it’s more gradual and the tap stays centred. You are supposed to use a bottoming tap to chase the rest of the threads down, so you can use the whole length of the hole. And in the ideal world you have all three of taper, plug, and bottoming taps to make the threads gradually and make a really nice thread, but a lot of people don’t care for the plug tap and just tend to skip that option atleast for holes that aren’t through holes.
Everyone is like "I want a 1600hp 4 rotor built by ****insert rotary engine builder here****"
Meanwhile I'm watching rob and thinking "One day... I hope I get a rotary built by Rob"
Hope to learn more from you and still anxious to see how this engine is goin to turn out
Rob this is frankly meant for some "other" sites, I am on the edge of flagging this as not fit for youtube. Absolute beauty.
Wow rob you have really out done yourself this time!! It is amazing to see how far you have come with the machining!
21:55 no time wasted bro been watching from the start and every video in between, fun, entertaining and I'm learning a lot so time well spent. Keep it up bro 😎👌
Digging what you're doing. Seeing you progress in mechanical engineering (my field) is cool. Looking forward to you learning the difference between "tolerance" and "clearance", Whipper Snapper. :)
Rob. You can always put a drill bit in a collet. You don't need to use a chuck. You gain a lot of working room and rigidity that way.
That noise from your drilling is called chatter, Its hard on tools. Typically slowing your spindle Rpm down can help with this, You can get better tolerances and better finish with a proper sized drill & reamer to finish the cut as well.
Anytime you are tapping threads you should use thread cutting fluid or at least something, Taps get very hot pretty quickly even when done by hand and It'd suck to have it snap inside your work material and It should help the threads cut better.
Just some ideas/my two cents, I'm still learning for sure myself, All my knowledge comes from someone who knows an unbelievably more than me lol.
Your killing it though, Love these videos and how far your taking it, cant wait to see how far this goes!
Best thing is Rob .this is good development learning and its awesome to see also . Before long there's gonna be production parts from you if you keep going awesome job dude
Beautiful work Rob, looking forward to seeing everything running again!
Looking forward to the day i can buy a Dahm billet 3 rotor, also there is no other channel that gets me as exited for a new video as this channel, you just know it's gonna be good
Rob definitely geeks out more about the details and learning about the process than just about any other builder. So cool to see him get work done on his projects and learn how to do everything himself.
Its so amazing to watch this go from an idea of what you need to beautiful custom machined part all in one video
As a toolmaker I love watching you learn about machining. Your tool holding and fixturing is alot better than it use to be.
I ran CnC mills and lathes and absolutely loved to do R&D. Production is cool but gets kind of boring after a while. Fun to watch this kind of stuff!
Love the dedication and now the parts you create! CNC makes things more accessible!
Rob, I have to say that I'm very impressed with the content of your channel. I'm totally locked in and geek out over all of the technology and your desire to push the rotary platform far beyond what it was designed for. Thanks for all that you do.
So proud of you for learning the machining process and doing it very well. It really does unlock the ability to take things to a professional level. Keep trying, keep learning, and don’t sweat the occasional light crash. You won’t damage your machine unless you really plow it into something. Losing a tool is always an opportunity to learn a better way of doing something, as long as you don’t lose the part in the process. That’s a lesson you don’t want to learn the hard way. 😂 From one DIYer to another, I appreciate your willingness to learn and ability to stay humble through the process. Can’t wait to see what’s next on this build. 👍👍👍
Super interesting episode Rob, nice work on the custom fuel rail fitting!!
That was awesome to watch, i can't imagine what it's like to plan this and see it come together. Thank you for letting us see how the magic happens. Coolest build channel on the tubes.
These just keep getting better and better thank you for the content.
So exciting to see how far you've come since your comments on MotoIQ back in the day, wish I could work with you!
I've always been intrigued with rotaries but just accepted the fact that I won't ever be able to build a reliable one until you started producing such in depth videos over the years and now i'm very hopeful for one day having my own rotary, plus if I can buy components straight from Rob Dahm himself I would be absolutely thrilled! Thank you so much for everything you do!
Favourite channel, hands down!
Thanks guys 👏
Taking "fuck around and find out" to a whole new level.
I'm here for it!
Love the attention to detail...
Every video is packed and helps loads!!!!
Where are the kitties though? 🐈🐾
No words. 😍😍 Eye candy. Can't wait for the complete build and engine running again.
Nice work Rob! Just FYI if you use a corner rounding endmill on the top edge of the injector hole it will keep you from cutting the injector o-ring. A chamfer will not stop that from happening. I build some biller intakes for X3's and I use a .062" corner rounder.
To avoid those major crashes or any other major concerns about it starting in the wrong place slow down the initial movement from the carousel to the piece to about 5%, and once you know its going where it's supposed to be, then you can go back up to speed.
Yo rob you’re insane man. I’ve been a huge fan since I was like 19 and I’m 21 now and I feel like I would have such a good time being around someone like you who is so intelligent and dedicated. I feel like I could learn so much from you, you inspire me to want to build a rotary one day when I get financially stable
This is very cool man... I like the design of the piece that holds both injectors the "final" form looks wild for a motor of that era
Your videos always make me smile, maybe because of the geekiness or the general energy. I really do wish you the best and to succeed into making this dream a reality.
I think the next step is a variable length intake like that Indy car engine has. A fixed length runner is a compromise in different rpm ranges. Even the Lincoln Mark 8 used a variable intake runner from short to long depending on rpm and throttle position.
Amazing CNC work Rob. I love the R&D you commit to.
"For me deep is about 3.5"
-Rob Dahm '21
And this is why I stay up all night, keep up your amazing work!!
I am extremely impressed with all of the hard work you are putting into your projects. Wish I had enough time and money to dedicate to my own projects. Kudos to you. Keep it up!
Rob man this episode topped it off for me. That injector holder machining was mega sexy brother. Not a rotary guy by any stretch of the imagination, but I'm a gear head and I totally appreciate the jewels being dropped on this machining heavy episode. Thanks for sharing, now I am for sure going to buy a milling machine as soon as I move in to a new shop space where i have more space for such a beast. thanks again brother and may you reach all your rotary dreams and stomp on KennyBs Hoony. All the underdogs in the world are rooting for you cuzzzz! One L from NYC.
I'm so hype for this type of content Rob is putting out. I love how wild this shit is getting!
I love seeing the cool cnc content! Just curious if you will clean up the cuts a bit later? What I mean is the area around the injectors isn’t the smoothest looking. It kinda messed with my ocd lol. It’s great to see you tell us when you screwed up or something bad happened. I got to say the best part of this video is seeing you smile like a little kid on Christmas morning while opening presents. We need more happiness and positivity in the world right now. Thanks Rob you are great!
Love the way freshly cnc'ed parts look.
Interested to see how you map the car with the new injectors in and what advantages it gives you.
Wow. Ran the machine in an unproven state with 100% rapid active. I’ve used a haas machine similar to this one and I don’t know about you guys, but I’d prefer to dip a toe rather than going in head first. Running a machine like that, this guys got some serious stones.
Usually we start at 25-50% and run the machine with stops engaged and check distance to go before each operation on the first part. It’s worth saving that 80$ endmill / holder combo if you’re just doing low production, a 20$ piece of alu can turn into a 200$ job quickly 😂.
its not brave, it is completely oblivious and shows he has no idea what he is doing.
Rob very interesting. We solved the 4 rotor PP port no Pri injector by using the oil meetering hole in the Rotor housing. So it's directly into the housing. I have pictures of my build back in 2009 if you want to see. Love what you do man, wish i had the means to do what you do. Keep up the good work :)
Absolutely love it- to be able to fully do all your work and fab in house is just amazing to me!
Good to see your on the right track, there are still a few thinking your overlooking in regards to that inlet manifold I have previously mentioned.
Rob turned me into a rotary lover, it has become my favorite powerplant.
Big Congratulations @RobDahm this is exciting to watch
Cant wait to see you do more work to the 4 and finish and have fun!
Honestly some of my favorite TH-cam content!
This is so impressive....your talent and content is amazing !!!!
Absolutely awesome content Rob D!
I can't wait to hear this.
I haven't been in the machining world long but one thing I know is that if you are having a problem with chattering make sure you you can get the drill/end mill as short as possible without clamping onto the flutes. And also going to a collet instead of a chuck. And one more thing, hass's can jab a drill along fast which will keep this drill straighter and will break the chips more often in most cases.
The Thürmer tap bit is available with cutting down to the last part of the hole. They do them in 3 different styles for the first, second and final run through.
Looking good , pick up some tap fluid there is a grade for aluminum and steel. Also there is a form tap that makes stronger threads by compressing the metal to form a thread . It requires a different size minor drill .
Love seeing the machining vids!! I do it for work, so it’s awesome to watch it on something this cool. Little tip: make life easier for yourself a pickup a DRO for your manual mill. Not crazy expensive, pretty easy install, and you’ll be able to make more work faster out of the manual
You are a madman and I mean that in the best possible way 😄. Thanks for the video you guys! Looking forward to the rebuild!
yes u can use the other bit for any kind of metal u only need too drill bigger holes. the thread drill is intendet too even cut hard steal. Sorry for my bad english
I have previously thought of the issue of having injectors so far from the entry to the combustion chamber. Rob it is awesome to see you going to the enth degree to advance the Rotary engine. So psyched to see the end result.
As a die hard pushrod motor enthusiast, I approve. Lol glad to see the motors getting closer to completion and can't wait to hear it make that wonderful rotory noise.
Amazing work Rob, I'm truly impressed 💪🏽🙏🏽
You're a pioneer in rotary's Rob, can't wait till it's fully assembled again