Attaching the chainstays // Romax Build Part 3 - Framebuilding 101 with Paul Brodie

[@pimonjindas]

Hi Paul, Really liked your engineering. Take care. Tks

[@paulbrodie]

Thank you very much!

[@thinkpadBentnoseTheBlind]

I love this bike. My dream frame is a handmade reynolds lugged Tamarack frame . Mark Beaver makes them in Nova Scotia. He was one of the original owners of Cyclesmith in Halifax

[@paulbrodie]

Good Stuff! 😉

[@shawnlund]

I'm pretty much addicted to watching your videos Paul, as a mtn biker and a hobby machinist its right up my alley.

[@paulbrodie]

Thanks Shawn. To be honest, when Mitch and I started this channel, I asked "who would want to watch a 65 year old guy make stuff in his shop?" It's been a great ride so far :)

[@Scottbenwalker]

@@paulbrodie I am also enjoying your videos immensely! MTB lifer and hobby machinist here enjoying every minute of this. Thanks so much for sharing!

[@paulbrodie]

@@Scottbenwalker Ben, thanks for watching!

[@wesleyrourke]

Thinking about you today while working on my first frame. Thanks Paul!

[@paulbrodie]

Well that's a very nice comment. Thank you!

[@fabianm4327]

Hello Paul, you are a true craftsman.

[@paulbrodie]

Thank you Fabian.

[@StuartMetcalfe]

Great timing! I welded my chainstays onto my first frame earlier in the day and hadn't decided how to deal with the chainring clearance issue, then got a notification of this video. Just tried it with a short length of rounded bar in the vice and it worked great. Thanks!

[@slimdog72]

I bought a 1991 Rocky Mountain Expert new. The braze ons were placed on the headtube. I rode it for the summer and then sent it back to Rocky. They moved the braze ons back a few inches at their cost and re-painted the frame. Just cost me shipping. I miss the costumer service from the 90's. Loving the Romax build series.

[@paulbrodie]

I never did like braze-ons on the head tube. I always thought they kinked the cables too much. Thanks for liking our videos :)

[@spleen123]

loving these videos Mitch and Paul, so informative and contagious!

[@djyul]

Dont you mean Paul and Mitch?

[@scottcurda3232]

I have been binge watching all your videos. Hope some day to learn from you in person. Until then, stay safe and helping us all with our craftmanship fix.

[@walthansen6333]

These videos are fantastic.... Absolutely riveting.... Every bike guy should watch these.

[@depecheboy77]

Hi Mr Brodie. I hope you and your family is good. Your video's is perfect teaching bike modelling and making. Thank you so much your effort.

[@paulbrodie]

You are very welcome. Thanks for watching!

[@josemorenoporras7506]

Wow nice looking bike!Awesome video series. Waiting to see the final product!

[@mattholmes5978]

Wow I wish I could have been a student on the frame building 101 course! Absolute masterclass. Thanks for sharing your knowledge in such detail. Watching from Coventry - UK keep the videos coming.

[@paulbrodie]

Thank you Matt.

[@monztrluvr]

Thank you so much Paul and Mitch! Greetings from India.

[@paulbrodie]

Thank you. I was in India for a month back in 1976. We stayed on a houseboat up in Kashmir. Good memories!

[@monztrluvr]

@@paulbrodie do let me know if you're planning to visit again! I missed by a year. Was born in '77 !

[@carlmace5633]

Another superb, instructional video, great job.

[@vpcogworks]

Your knowledge is just incredible, thank you very much for these videos, I'm learning a lot from them!

[@felipenavas]

Awesome content. Thank you so much for sharing your work!

[@halimchandra6873]

What a masterpiece.salut

[@paulbrodie]

Thank you Halim.

[@thibdrop]

As always, great quality content! Thanks for taking the time to show such amazing skills and sharing golden tips! Makes me want to swap my Tig torch for a blowtorch... Greetings from Switzerland

[@chrisallen9154]

Hi Paul, nice to come across your videos. I remember you when you were working at Rocky with Derek Baillie. I was just getting into doing some frame building myself at that time. Back in the days of Talbot and Proctor. Nice to watch you build a fillet brazed frame.

[@paulbrodie]

Thank you Chris. I remember working with Derek Bailey too!

[@amc_sounds]

26" frame design running 27.5 wheels with a 1*10 set-up. You've just invented the next big thing...or is that the gravel bike? Best get that patent in 😉 Didn't expect to see a seatbolt QR used like that either. Super work!

[@bikechopper6288]

Muito top seu trabalho parabéns👏👏

[@arnljotseem8794]

Interesting to follow this frame build. Everything is totally new to me. Are you ever going to talk about Ruby 2.0 there in the background?

[@paulbrodie]

Yes. After the Aermacchi racer is finished we will work on Ruby 2.0. I promise.

[@franccoch4676]

Hi Paul, thanks for your videos which inspiring me a lot. I wonder how you made the chanstays tube, I seems to require great technicity ?

[@paulbrodie]

Chainstays are often tapered, ovalized, and bent. They require very special tooling that I do not have. You can purchase them from suppliers such as Nova Cycle Supply. Thanks for watching!

[@walthansen6333]

Beautiful welds... Think I'd want that frame bare, with just clear coat. The welds are just too nice to hide under paint.

[@paulbrodie]

I agree! That is what happened..

[@moosevt1]

Brodie, I run these videos in a constant loop on my TV. So good. Is that guage you use for sweeping the dropouts made of aluminum pipe? I want to make something like that. Such a great way to see that everything is centered. I am not a fan of using a surface plate to do this. Thanks, Wil

[@paulbrodie]

Wil, yes it aluminum but I would call it a tube, not pipe. Tubing can be very finely made and precise, but I think of pipe as crude and usually heavy. I probably used .065" wall. Glue a plug into the end, cut a slot and make a pointer. I am with you on surface tables; not a fan... Out at Framebuilding 101 we had a nice surface table and I would show the students how to align with that, and then I would show them my method. Do you know how many students used the surface table? None.

[@moosevt1]

@@paulbrodie I was going to say tube but wasn't sure if you went that nice Thank you!

[@JoshBleasby]

Hello, the videos are amazing, just found your channel and I'm hooked! Also, that little titanium ruler is awesome where can I buy one? Thanks

[@paulbrodie]

Thanks Josh. That ruler was a gift, if I remember correctly, but the company name is on the face: Titanium Limited. Maybe try contacting them, if they are still around.. Thanks for watching!

[@donaldgross8371]

Hi Paul as a wannabe frame builder thanks for posting this video series which is fantastic. I have a couple of questions I hoped you could clarify. Do you first braze the joints with silver and then use bronze to finish the braze and if so why? Also you tack the stays with a TIG welder and then finish with a torch. Is there a specific reason for using the TIG welder for the stays?

[@paulbrodie]

If you look in the Fillet Brazing 101 comments, this has been answered several times. I use "nickel silver" which is a misleading name because it has ZERO% silver. I did not name it! I like Tig for tacking stays because there is very little heat involved. With oxygen-acetylene the stay often heats up quite a bit, and "grows" longer putting pressure on the frame fixture. Then, after tacking, the stay cools and pulls the fixture the other way. That's what I don't like. Tig is better.

[@markyandle4196]

Hi Paul, it's a joy to watch you work, thanks for sharing! I've a question around the chainstay / dropout joint. You made the join asymmetrical, with a much bigger scallop / fillet on the outside of the stay. You didn't really talk about why you design this way. Is it aesthetic? or for chain clearance when you're in the smallest cog? Or a bit of both? Presumably there is no problems or other considerations doing it this way?

[@paulbrodie]

Thanks Mark. Yes, you got it right. It's a bit of both. No other considerations.

[@markyandle4196]

​@@paulbrodie thanks Paul!

[@toufamustofa573]

What is the name of the frame clamp? where to buy?

[@paulbrodie]

They are sold by Park Tool in the USA.

[@brandonposer3026]

Hi Paul, great videos! Are you using the same flux for the nickel silver and bronze? Also, is that a Dynabrade belt sander?

[@paulbrodie]

Yes, the same flux Type B blue paste flux. It's a homemade belt sander using the Dynabrade arm and rubber wheel. I built it 35 years ago and saved $400 over a Dynabrade...

[@brandonposer3026]

@@paulbrodie Thanks Paul! Haven't used Gas Flux much as I primarily use Cycle Design flux and filler. Why do you use the nickel silver as a tinning material rather than bronze? Is it stronger than bronze? Very cool about the sander. I really like how much room there is for the belt to wrap around the material. I haven't seen anything like it. Very cool indeed!

[@benc8386]

Lovely work and the bike is looking amazing! Doesn't a 73mm BB shell usually go with 135mm rear spacing? I think you said yours was a 68. It makes a tiny difference to the chainline which isn't important but you also might not need the dimple. As a rank amateur I am terrified of having to put in a dimple. I also leave a dummy axle bolted into the dropouts while attaching the chainstays in the hope that this reduces distortion.

[@paulbrodie]

All MTB's used to be 135mm rear spacing, and a 68mm BB was widely used, sometimes 73mm but not so much. Either will work. Thanks for liking my work :)

[@ggbryan22]

What kind of nickle silver rods are you using? Love the channel!

[@paulbrodie]

The size is 1/16". I know they used to be called a "773" rod. I didn't have any packaging with brand and part #, but our local welding shops all know what nickel silver rods are.

[@toufamustofa573]

Pemjepitnya itu namanya apa ya ? beli dimana ? yang buat jepit frame repot raiso boso inggris

[@toufamustofa573]

What is the name of the frame clamp? where to buy?

[@nigelnightmare4160]

I was taught that it's "Chase'n'Face" because that's the order of operation.

[@paulbrodie]

You are correct; that is the order. I was taught Face'n'Chase for some reason and it stuck.

[@stoneyswolf]

The best part about brazing is the smell. I love that smell.

[@paulbrodie]

Hopefully not burnt flesh.. Thanks for watching!