Bilaminate Construction on a BICYCLE HEADTUBE // paul brodie's shop
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- เผยแพร่เมื่อ 12 เม.ย. 2024
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#bicycle #steel #headtube #fussyframebuilder
painting with liquid metal
As a retired Welder/Brazer and owner of an old Serotta, I can appreciate a lugged frame as few can.
Notice how he 'stores heat' / pre-heats - from 18:28 to 18:43 - applicable to sweating copper and brazing in general.
Yes, I would say Sculpting with liquid metal.. Thanks for watching and commenting!
Thank you Paul for explaining bilaminate, which has long been a mystery to me.
Thank you. I only learned about Bilaminate when I went to NAHBS about 12 years ago...
10:35 The Force is strong with Paul, because controlling X and Y simultaneously on a mill takes jedi mind tricks.
Yes, if anything will go wrong, it will happen using X and Y simultaneously.. I was lucky!
Freehand milling, baby.
Yes, I totally agree...
it is like a short meditation to watch how the small details are done with care. thank you!
That's a nice compliment... Thank you!
Thank you so much Paul and I’m so happy to see new Videos from you ! Much love from Germany
Thank you Vince. Greetings to Germany!
Paul is a legit surgeon-sculptor with those hands of his.
Thanks Scott. And, thankfully, I still have all of my fingers!
Paul makes it look easy
That's what happens when you have a Lot of practice.. Thank you...
At my local coffee shop last week in San Jose, a blue and white Broadi bike was parked outside. Same style. I can’t recall ever seeing one in any paint scheme before.
I remember the Claud Butler frames when I was growing up and every kid had a bike, they where very sought after. Your a very skilled man Mr Brodie.
Michael, thanks for watching and commenting...
Lovely work. A lot of your motorcycle work is interesting but the framebuilding is what I'm here for. Perfect shorelines.
Thanks for being a fan of Framebuilding. Our Bicycle Show is June 15/16 in case you live nearby!
I just purchased some parts from a guy with a Brodie just like that. I asked what he wanted for that. He smiled and said it was going with him. We both got a laugh out of it.
Well, I only made one of these, so I'm not sure about that...
@@paulbrodie Gotcha. His was a gravel bike with the color scheme. It was a beautiful bike!
It's great to see real craftsmanship.
Thank you John!
🇬🇧 🙏👍 A fine craftsman you are sir ! Enough to get any serious cyclist sweating 😁 Re, skilled women by end of WW2, when the California LIBERTY SHIPS programme was set up by Walter Kaiser (Kraut name if ever there was !) and co they'd have competitions to increase productivity etc, the three fastest ship plate riveters emerged as 3 women . . all had previous jobs. . as waitresses ! 😅
Your comment about a good painter being important struck home 🙂. In general fabrication circles, the phrase 'grinder and paint makes the welder I ain't' gets used a lot.
I have not heard that phrase before, but it is so true. Thanks for watching...
Working in power plants I heard "cut to suit, beat to fit, paint to hide"
Interesting to see the process ,, it really makes you appreciate the craftsmanship in even the smallest part , free handing the mill is like writing your name with an etch-a-sketch .
Writing your name In Cursive !
Thanks Tom, yes I had a good time filming this one!
Beautiful classy like wing tip shoes. You are a craftsman
Thank you so much...
I think I once herd a welder say that "paint will hide what you ain't" 😂
Amazing work as always 😀
I'm glad alt-cycling is becoming a thing. Maybe there will be a lot more lugged frames out there? They're just beautiful.
Very cool as always. I didnt know Claud Butler was instrumental in that form of construction. Thanks for sharing.
Thank you. If you go to Wikipedia, Claude certainly gets a Lot of press for Bilaminate construction...
@@paulbrodie Thanks Paul
Hey Paul & Mitch, another great episode! It's so satisfying to watch you take the raw materials, use your amazing machinist's skillset to tweak them into the shapes you need, then use your weld/solder/braze techniques to create the gorgeous pieces of moving artwork! Many thanks!
Thanks Tom. Appreciate your comments!
I bet you're pretty good on an Etch-a-Sketch!
Beautiful work. 👍
Thanks for this video. I didn’t know bi-laminate but ride a nice lugged steel “Waterford” frame .
Now I understand the difference.
That was great watching you work! Super cool thank you much.
Just wonderful to watch a great craftsman!
Thank you Bill...
Another amazing tutorial! With each video I lean something new! Go Paul and Mitch, keep moving forward!
Thank you very much. Yes, always moving forward, I hope!
Good show, guys!
Thank you Paul...
11:28 I absolutely LOVE my Dynafile II from Dynabrade!
Beautiful work to the both of you, truly masters of your crafts
Thank you. I am still learning...
That tube that you milled looks like a klingon weapon 😅
Your work Paul is second to none. Great video mate cheers
Very kind, thank you!
Great work. I love your workshop Paul (not that I'm envious).
Thank you Colin....
A master at work
Very nice of you to say so. Thank you....
@ 12:39 You are making a giant Pen knib 😮
Total goldmine of info
Thanks
Beautiful workmanship.. I never realized that you would use the silver rod on the fillets, I thought it would run too thin opposed to straight brass rod. I’m still braze quite often on my hot rod and motorcycle projects and I only use the silver once in a blue moon on things with a tight fit up or when I don’t want a large fillet. I learn a lot watching your channel. Thx.
it’s not silver. you may have misheard “nickel silver”
Thanks!
Great information
👏👏👏👌
Cheers Chris
If I ever had a frame of yours I would hope it had a clear lacquer to show the beauty of the heat in the metal and the fine craftsmanship of the builder.
You've inspired me. I'm gonna practice cutting lugs out of seatpost cutoffs. Maybe I'll build a little kid's trike with fancy lugs.
I’ve done all three, Like Subcribed and told all my friends that would listen😊
Best videos on TH-cam.
Mr Paul,,,,,you are a walking encyclopedia and a great professor…every video I watch I learn something new….
PS: Life is short ,,,enjoy the ride ,,,specially in a bike made by Mr Pau Brodie….
Art!
another masterful demonstration… mixed in with some interesting history…i love that beefy bike…i weigh my bikes in comfort, not grams…i bet she’s a dream!
btw…i have never ridden such a fine bike, but i believe there is something to be said for larger wheels and thicker (2.5-2.75) higher psi (65 lbs) tires…i put in approx 200 miles a week in the saddle of a rebuilt large frame 7 speed cruiser with these, and i average around 18-20 mph…ive finally got it geared properly, and it’s like riding a freight train once you get to speed…so comfortable…it also builds a momentum that i can feel on gusty headwinds and short uphills that a lighter bike might not blast through as easily…it’s a very addictive quality that is hard to describe…but it is certainly unmistakable…
love your work!
Paul, i greatly appreciated seeing your techniques with the torch. There are many great resources available for TIG welding, but less so with brazing. Thank you very much! Still working through your catalog!
Sweet! learned a lot
Excellent work so detailed and delicate
Always wondered about these custom made lugs. Thanks for sharing
Very Cool 👍
man you do such pretty work. Great video.
Great video
Interested to see you use nickel silver for the lug section. I assume that you did this so that it would stay put when you fillet brazed the main joint.
Just Perfikt! As Allen Millyard would say.
Your work is exquisite, thank you for sharing what you do.
nice work！
Beautiful workmanship, thanks for sharing your videos. 👍
Very interesting process, thanks for the excellent tutorial Paul.
Very cool looking
So curious why nickel silver and not the lower temp silver solder? Just that you want to be able to machine the "lug end" of the joint first, and want to avoid distorting the "lug" end? I always thought Bi-lam was just rolling your own lugs. High-fives, great work and video as always!
That initial mini fillet he did had to be done with nickel silver, you can't create a fillet with silver alone. I suspect he switched to low temp silver when doing the lug work but maybe not. I've seen skilled brazers do lugs with bronze.
He didn't call it out when he switched to the bronze for the larger fillets so perhaps just didn't call out the switch to silver.
You have skills that abound 🎉 Very happy to see your health improve 🙏 ❤
pretty sweet construction. Keep up the cool work Paul anr Mitch
Thank you.
That was COOL
Where are all those guys who come around and say "First."? I'm more of a Second guy myself.
Very skillful................ a pleasure to watch.
Thank you Leslie...
cheers fellas.
The bi-lams on my Paris frames are made from flat sheet that's been rolled into a curve to fit over the tube. You can see the joint at the back. More than one way to skin a cat I guess.
I have a bicycle made like that - it's German Durkopp from the early 60'
Really interesting video, thanks for making it. Again, admiring that BEAUTIFUL work of useable art that inspired this video, so gorgeous. Curious though Paul, besides the looks, does this technique/method add a lot more strength than just doing straight up, tube to tube filet brazing? I mean for sure it adds a lot of intricacy and beauty, just curious if there's other benefits as well. Oh and if I got one of these types of frames made, you wouldn't be able to "hide" anything because I'd only want it clear coasted so you could see the craftsmanship and beauty of it 😀
Finally, the brodie video I’ve been waiting for 🎉🎉
Nice and pretty 'easy'! So how is a complete Lug Made.? Seems to be much harder because of Tube Angles..
Lugs are either stamped out, or investment cast. The cast are usually higher quality...
Hey there Paul - fantastic milling skills…just wow! I am wondering what your thoughts are on using oxypropane instead of oxyacetylene on brazing? Thanks
A few things... Are you flowing the silver completely into the lug section and is your DOM 4130 or something more akin to automotive roll cage tubing? Thanks... Looks great. Cliff
D.O.M. is usually something like 1020 or 1026 carbon steel, while most 4130 I’ve seen (and bought) is seamless.
👍😎
Is sometimes whole lug made this way?
Yes, Waterford Precision Cycles (now closed) made their more ornate stainless steel lugs by welding sections of tubes together and hand finishing before brazing the frame like traditional joined. Also Spectrum Cycles built Tandems with custom dimensioned lugs the same way. Both have closed in the last couple of years but their websites remain where you can see their work.
Do you sell all those skewer springs you just made?
Jay, are you sure you have the right video? Skewer springs? I don't recall making any skewer springs.. Maybe you have to refresh my memory!
@@paulbrodie lol. The shavings just looked like skewer springs.
I call those shavings "Schwarf"... Apparently, it should be pronounced with a German accent..
@@paulbrodie I will now call skewer springs 'Schwarfs' lol
So how the hell do you train your brain to do 2 axis milling by hand.?
Actually, if you go slow enough, you only need to do one axis at a time - just move in *very* small increments, e.g. .005 / .12 mm. Sort of like a primitive species of numerical integration, e.g. Riemann summation.
This is *very* slow, however - which is why you need to concentrate *intently* when using *both* hands on the cranks. I can do a passable job *SOMETIMES* - which is why moving but one axis in very small increments is a fall-back method - that, using various sizes of, say, ball-end cutters when lightening aluminum bits on a recent bike-trailer, and angle ‘plates’, etc.
Or the short answer is “ practice, grasshopper “ 😂
Would it be out of line to refer to the torch wielding women working in the bicycle factories after World War II as “ Brazing Hussies”? Sorry, that’s just the way my mind works. Very interesting process. Thanks for the video.
You would not be able to make many of those joints in one day! 😞
If that were your only job, and your jig was table mounted to allow you to brace your elbows on the table, smaller silver and brass to better suit the material thickness it would make the job far easier and increase the speed. This is a one off that he didn’t take the effort of time to make it rapidly as would have been expected in a production environment. It’s not uncommon for prototypes to be assembled as in the video and if numerous examples are required to set up for it. But this is the way most prototypes are made by highly skilled professionals. But yep, this is time consuming 😅
Too n many French ads 👋
We have no control over what ads you see.. Get TH-cam Premium, and NEVER watch another ad..
Beautiful 😍
Are you using the Nickel Silver for bilaminate construction because it can handle the high temp of the bronze fillet brazing rather than using like a 50% or 56% Silver as one would for traditional lugged construction?