5 Day Fillet Brazers
The first step to building your own bike frame
5 Day Fillet Brazers
Learn how to fillet braze two tubes together — clean, strong, and precise. Even if you’ve never held a torch before.
If you can do this, you’re no longer thinking about building a frame.
You’ve already started.
You don’t need more research.
You need your first joint.
Get instant access to 5 Day Fillet Brazers for $99 (€95).
Lifetime access. Start today.
Whether you’ve been thinking about building your own bike frame, or you want to improve your brazing, this is where you start.
Fillet brazing is the core skill behind custom steel frames.
Once you can join two tubes cleanly and reliably, everything else becomes possible.
It works for any type of frame — road, gravel, mountain, trekking, or city bikes.
But more importantly:
It’s the moment where you stop thinking about building…
and actually begin.
ALL YOU NEED TO KNOW
In this course, you’ll learn:
- How to lay a strong, clean fillet that actually holds
- How to control heat and flow instead of guessing
- How to prepare your joints so they fit and braze properly
- How to spot mistakes early and correct them
- How to look at your work and understand what to improve
This is the skill everything else in framebuilding builds on.
Once you’ve done this once, properly,
building a full frame is no longer a distant idea.
It’s just the next step.
People who started exactly where you are now:
''There is hardly a better way to spend your vacation as an enthusiastic cyclist than a week in Potsdam in the workshop of Big Forest Frameworks. I had no previous experience in brazing, but the frame turned out beautifully and has been rolling through our forests for 3 years now. Thanks Robert!''
- Daniel Helbig
''An absolutely brilliant experience building my own bike frame with Robert. Friendly, competent and sufficiently reserved so as not to take over all the work. At the end you really have the feeling that you built your own frame completely by yourself. A recommendation for every bike enthusiast''
- Christian Macholdt.
''I built the perfect ATB frame for myself in 5 days at Big Forest Frameworks. With great instructions and support from Robert and Konrad, it worked perfectly. I'm thrilled that I was able to build something unique and that all the details were possible. Fillet brazing is also a lot of fun. Thank you!''
- Klaus Mathwig
How you go from zero to your first real joint
This course is structured so you don’t get overwhelmed or stuck.
Each step builds on the last — from your first setup to the moment where the brass flows, settles, and you realize:
“Okay… this actually works.”
1. Material Selection
You start with the basics — tubes, filler, torch setup.
Not every option, not every theory.
Just what you actually need to get a clean, reliable result without overthinking it.
2. Preparation
Before you ever light the torch, you prepare your joints so they fit properly.
You’ll see why small gaps, alignment, and surface prep make the difference between frustration…
and a joint that just works.
3. Brazing Fundamentals
This is the turning point.
You heat the joint, watch the metal change, and learn how to guide the brass instead of fighting it.
At some point, it clicks.
The brass flows where it should.
The joint holds.
That’s your first real fillet.
4. Finishing
Now you refine it.
You clean, shape, and smooth the fillet so it’s not just strong, but looks intentional.
This is where something rough starts to resemble the frames you’ve admired.
5. Analysis
You step back and look at what you’ve done.
Not guessing, not hoping — actually understanding:
Where the heat went
Why the brass moved the way it did
What you’d change next time
By the end of this, you won’t just understand fillet brazing.
You’ll have made your first proper joint — one that holds, looks right, and proves to you: You can do this.
Hi, I’m Robert
I’ve had a torch in my hand almost every day for the past 12 years, building custom steel bicycle frames.
Over time, that naturally led into teaching.
Since then, I’ve guided more than 600 people through building their own frames — most of them starting with no prior experience at all.
No background in metalwork.
No experience with a torch.
Just the idea that they wanted to build something of their own.
And I’ve seen the same pattern over and over again.
At the beginning, everything feels unfamiliar.
The heat, the timing, the way the metal reacts — it’s easy to feel like you’re just guessing.
But then something changes.
You start to see what’s happening.
You adjust.
The brass begins to flow the way it should.
And at some point, there’s a moment where it clicks.
The joint holds.
It looks right.
And you realize:
“I can actually do this.”
That moment is what this course is built around.
Because once you’ve made your first proper joint — one that is strong, clean, and intentional — everything else in framebuilding becomes much easier to approach.
You’re no longer starting from zero.
You’ve already begun.
And from there, building a full frame stops being an idea…
and becomes a decision.
Who Is This Course For?
You’ve been thinking about building your own bike frame…
but haven’t actually started yet.
You know fillet brazing is the essential first step,
and you want to learn it properly instead of guessing your way through it.
You might already have some experience with a torch,
but you’re not fully confident yet —
and you want cleaner, more consistent results.
You like the look of fillet brazed frames.
The smooth transitions, the clean lines.
And at some point, you’ve thought:
“I’d love to be able to do that myself.”
Fillet brazing is what makes that possible.
It works for any type of frame — road, gravel, mountain, trekking, or city bikes.
But more importantly:
It’s the skill that lets you start building, instead of just thinking about it.
Who Is This Course NOT For?
This course is not for you if you prefer to figure everything out on your own through trial and error.
There’s nothing wrong with that —
but this course is designed to give you a clear, structured path so you can get to your first proper joint faster.
It’s also not for you if you’re mainly looking to keep researching, watching videos, and collecting information without actually trying it yourself.
This only works if you’re willing to pick up a torch and do the work.
If you’re ready to stop circling around it…
and actually start —
then this will fit.
Frequently Asked Questions
What skill level is this program for?
You don’t need any prior experience.
Most people who take this course have never held a torch before.
We start with the basics — materials, preparation, and how the process actually works — and build from there.
By the end, you won’t just understand fillet brazing.
You’ll have made your first proper joint.
How long do I have access to the program & when does it start?
You get lifetime access.
You can start immediately and go through the course at your own pace.
Some people move through it in a few days.
Others take more time and revisit sections as they practice.
Can't I learn all of this on Youtube?
You can find pieces of it.
But most of it is scattered, inconsistent, and often missing the small details that actually make the difference.
This course is structured so everything builds on the last step.
No guesswork.
No jumping between videos.
No trying to figure out what matters and what doesn’t.
Just a clear path to your first clean, solid joint.
Do I need to have all the gear before starting?
No.
You can go through the course first and understand what you actually need before buying anything.
We cover the tools, materials, and setup step by step, so when you do invest, you know exactly what you’re doing.
Should I invest in 5 Day Fillet Brazers before investing in something else frame building related?
Yes.
Fillet brazing is the foundation.
If you can join two tubes cleanly and reliably, everything else becomes much easier to understand.
This course gives you that first step — without the complexity of building a full frame
If you’ve been thinking about building your own frame but haven’t started yet,
this is a solid place to start.
Is there a guarantee?
Yes.
If you go through the course and feel it’s not for you, just send a message within 7 days and you’ll get a full refund.
No questions asked.
A small note
For many people, this is where it starts.
You make your first proper joint.
You understand how the process works.
And you realize it’s not as far away as it seemed.
From there, something shifts.
Instead of wondering if you could build a frame…
you start thinking about how.
If that happens, you’ll know you’re ready for the next step.
