Building a Custom E-Mountain Bike Frame (Part 2) with Paul Brodie - Framebuilding 101
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- เผยแพร่เมื่อ 26 มิ.ย. 2020
- Some folks say that building a bicycle frame can be divided into three fairly even divisions of labour: the front triangle, the chainstays, and the seatstays. As a framebuilder, I would agree with that. Here is part 2 and the chainstays are going on.🤓🏁
► Click here to see Part 1: • Building a Custom E-Mo...
► Click here to see Part 3: • Building a Custom E-Mo...
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#ebike #metal #custom #fussyframebuilder
what a jewel this channel is
Hi Paul, I'm constantly amazed how freely you give your expertise, with these videos. thank you!!
Love how casually you switch between metric and imperial. life goals...
Thanks for watching!
Brilliant artwork by a true artisan.
Thank you very much! 😉
It is going so smoothly that I am ready to believe is easy task to do :D This treacherous magic of camera and amazing skills! Enjoying show and project!
I’m loving this channel. I had no idea you could hold something of that shape in a v block. Lots of things to learn here.
Yet another enjoyable episode. Thanks guys.
Love those videos ,thanks for sharing!
Impressive work!
Beautiful job!!!
Sir u are a awesome workmanship,perfectionist.wish my e-bike that I’m building was just like that.thank you for sharing your skills.learn a lot with your videos.have a good day!!
Thank you Dan. I hope you have a great day too !
Holypooooly, seems you know and you`re loving what you`re doing. Great respect for this work, it`s art on the highest level my dear.
Thanks for commenting. I really do love what I do.
Thank you! Makes my day.
The Aermacchi 350 is beautiful. Good luck on the racer.
Hi Paul,
I am starting an electric bike/bicycle project and this video helped me a lot thank you.
Shan, thanks for watching!
How's that for a half inch? You're a wizard, Mr. Brodie.
It's so satisfying to watch your builds. A question though. Do you back purge the tubes when TIG welding? In fabricating for racing and off road applications on 4130 it has been identified as a recommended step to prevent oxide contamination of the backside of the joint.
Yes, you can back-purge for 4130, but I do not. It is extra Argon, tank rental, plus plumbing, and then drilling the appropriate holes for purging, and monitoring what is actually happening. I have never had a problem, such as cracking, and then wished I had back-purged. Thanks for watching..
G'day Paul, new to your channel and I'm enjoying your content. Love the combination of metric and imperial when they suit best. Must be driving both the Americans and the Europeans crazy, well done.
Thank you Ian. Years ago I had a "non-standard" Vincent Black Shadow, and it had a combination of fasteners including Imperial NC and NF, Metric, BSA, and Whitworth. When I packed a toolkit to go riding, I really had to think about it..
Extra fiddling with those chainstay. I know I would have screwed up at least one extra stay. Last frame I did I ended up cutting a pair short. Great work as usual, love following along on your projects.
if you cut them too short then you have to learn how to extend them..
@@paulbrodie Simple, run the endmill in reverse!
@@minnionator haha
"Educational Cost"; if you think of it as making scrap you'll drive yourself nuts/batty. Education is never free, use that as an "acceptable excuse" reasoning instead of beating up on yourself or "being afraid" of even starting. I've been around the sun 55 times and still have to remind myself of that, along with "Perefectionists are Never Happy".
*Hopefully* none of that applies to you. 👍🏼
First off quality craftmanship mate truly top notch..is there a reason you flame brazed instead of tig brazing with silicon bronze or aluminium bronze..it just peaked my intrest thats all..
I feel like I have more control with oxy-acetylene, and I can get into small places that would be impossible with a Tig torch. Thanks for watching.
Eres un artista mijoooooo
😊👌
Very nice apart from the Bosh engine, fit a bafang less money more power. Win win
Paul - I’m sure I have digital gages that aren’t as accurate as your eye-crometer!! Maybe I should send them to you for eye-calibration 😉👍
Excellent video BTW. I learn at least 3 or 4 things with each video I watch. More if I’m REALLY paying attention 😁.
Lawrence, thanks for watching and commenting.
Such an amazing wealth of information, thank you Paul!
May I ask why you braze the bridge tube and not TIG weld it? Will the weld warp it?
Thanks Gavin. Tig welding the bridge tube is very hard due to the lack of space. It is perfectly acceptable to Tig or braze. I just prefer using nickel silver to braze... :)
Great video and beautiful work! Are there any vent holes in those dropouts? I'm not sure you have any at the boschom bracket end so it might get a bit spitty when you're welding up the dropouts.
No vent holes. When the chainstay is welded up as soon as the seal is complete, welding stops.
Master fabricator. Skills that take decades to master.
Thanks Ken. I did start early; made my first bike at 12 years old.
@@paulbrodie wow thats cool man. I grew up riding 2 of the brodie bikes long time ago in Penticton where i grew up. We all bragged about how they were handmade and how strong the frames were. Lol
@@kenharty6016 My first bike was a mini-bike with a lawnmower engine.
@@paulbrodie thats the first motorbike i had was a bike with a briggs and straton in it. Lol ran forever i also had a go cart with a 9 horse briggs in it. Back in the days when you could get away with riding them in the alleys or side streets lol
@@kenharty6016 I had a Clinton engine that was direct drive; no clutch.
(Wishes his Tig welds looked as good…)
👌
Watching the reaming on the head tube was terrifying.... Idk if I could do that so late in the build. 😱😨
Yes, you do not want anything to go wrong with that operation.
@@paulbrodie - Definitely not.... Some of the stuff I did always followed a order of operations by difficulty, hardest first so if mess up I can always go back or restart.
You are a brave man.... Or just better funded than I am. 😂
@@xpndblhero5170 I say one of the big differences between a journeyman framebuilder and a novice, is that when things go a bit sideways (at some point in the build..), the journeyman knows better how to get things back on track. So, I don't see it as bravery or more cash, I'm more experienced at keeping my projects on track and moving forward.
@@paulbrodie - I've watched a bunch of your videos in the past couple of days and that was one of the first things I noticed... You definitely plan ahead for stuff, like that hole in the fork jig to heat the other side and the knowledge dropping about tacking the underside of weld so it pulls in before a weld and not starting your weld on the tack area incase it pops. I really appreciate random knowledge like that... 👍
@@xpndblhero5170 "Random Knowledge". I like that. Thank you.
Your work is inspiring! Coming from the woodworking world, I was wondering - you refer to the cuts you are making to join the frame parts as miters...I would refer to that as coping whereby you remove material from one piece to form around another. Does the term cope not apply in metal work?
Some say cope, and that is fine, and usually understood, but I learned that mitering made sense to me, and that is what I have gone with. Thanks for watching!
@@paulbrodie Thanks Paul - so glad I found your channel!
Oui Oui!
Thank for watching!
Starret hole saws? (Only have one, thus far, and only cut some Lexan with it.). Wondering what brands to get for 4130…
Starrett are great hole saws, and so are Milwaukee. Any reputable brand will be fine for 4130.
when you look at one Chainstay and compare it to the Battery Holder BLOCK you see quite a difference between novice and expert
No issues with assembly for me th-cam.com/users/postUgkxHL1v1R3NE5x4KiYfyt8dnQmyNYz7qi5L but I could see where some might benefit from using an experienced bike assembler/mechanic. I'm an older rider starting back after a 10 year break. This bike exceeds my capabilities and has been easy to get comfortable riding. I'm mostly on easy trails with almost no street riding and have not been disappointed with the performance of the bike. My fitness level is far below what I previously rode with and because of that the mileage is going on the bike slowly. While I'm losing weight slowly, the bike seems to tolerate my 220 pounds just fine. The bike has been used by several family members ranging from 5'5" - 5'9".
The new Lance Armstrong special , let's him win every time instead of muscle enhancing Drugs
Are we picking on Lance again?
@@paulbrodie , I never stopped , and it ain't picking , it's just telling the truth ,
Like the time he was exposed and Lied to the whole world saying that the person who exposed him was the Liar and ruined their career ,
His career is going to stay ruined and I will remind everyone what he did ,
The Lying bicycle boy
Is that a peacock making all the racket?
I wouldn't go so far as to call it a racket, but yes, I have a couple of peacocks.
I would love to work with you as an assistant.
Yes, a few people have also mentioned that.
Hi Paul, what is the diameter of the head tube you use here (2:22), in mm? Thanks a lot.
Pretty sure it's a 44mm Paragon head tube...
@@paulbrodie Thanks you. I wish I was your neighbor, we would run a project with you.
How come you brazed that one piece that connects the chainstays? Like i mean why braze that piece when you tig welded everywhere else?
That's a bridge tube. It's very hard to get the Tig torch into those small spaces, so I prefer to braze.
@@paulbrodie thanks for the answer Paul
Dear Mr. Brodie why do you make last welds on wideo using brazing technique why not TIG welds?
Nice project
Thanks Konrad. Not sure which are "last welds"?
Where you make small support between chain stays.
Thanks for reply.
@@kooonrad1 That is called the " bridge tube". Some frame builders do Tig weld it, but there is very little space so I prefer to nickel silver that tube. Either way is ok if you do a good job. Thanks for watching!
@@paulbrodie Great, Thank you for explanation, I was thinking that space was The reason.
Why did you braze the CS bridge rather than weld it?
Not very much space for a Tig torch to fit. So, brazing is easier, as strong, and faster.
I’m glad I read through the comments, I was hear for the same question. Cheers
same here .... lol
Wouldn’t it have been better to make the frame out of aluminum? Less weight.
And then pay hundreds of dollars to get it heat treated? It was never my design, and I was just following instructions...
why not alloy frame?
Because I like working with steel. Easy to fix, no need to heat treat.
Is it an aluminum frame??
No, it is 4130 cromoly steel.
What University did you teach at? Very lucky kids...
Framebuilding 101 at the University of the Fraser Valley. Youngest student was 15; oldest student was 75. Pretty big range!
Why not just TIG weld it?
Most of the welding on this frame is TIG; therefore I do not understand your question.
I use to work for Gene Winfield and he did a lot of braze welding. I'm sure if I knew how I would do more of it. Your videos have taught me a lot.
What the hell is the screams background noise? 11:36
My peacock.
@@paulbrodie That was my thoughts 🦚
@@paulbrodie I found your peacok th-cam.com/video/x4D_lLqj37c/w-d-xo.html 🦚 4:06
💞🇵🇰👍
Your good.
Wish I could sweep your floors and lube your tools for a year or two
I have a small shop, sorry.
really ?
... a hardtail ?
Hardtails still exist. I ride a hardtail.
That's awesome. Hopefully, you get credit on that students "final project"
How does an engineering student take credit for your engineering?