1894 Giraffe Bike rear hub...What can possibly go WRONG? // paul brodie's shop

[@yodasbff3395]

I was beginning to think that you were a robot since you don't ever make mistakes. It's good to see that you human. Thanks for sharing your videos. 👍

[@paulbrodie]

I am human that is For Sure. I don't make mistakes often, but this Hub was a Doozer!

[@gordonbowe]

​@@paulbrodie Seems like when you get started on a project and make a mistake early in, sometimes it just carries thru. Here's to making fewer mistakes next time, that's what I always say.

[@paulbrodie]

Yes, that was a crazy day. I am unaccustomed to making so many mistakes. I will try to do better next time...

[@scottcates]

The only people who make mistakes are humans 😜

[@Paulvx220]

Paul, as a matter of interest. Why didn’t you set the top slide over 29° when threadibg?

[@gordonbowe]

It's always a great day when a Paul Brodie video comes out

[@paulbrodie]

Gordon you are very kind! Thanks for watching....

[@kafkastrial8650]

The man that never made a mistake never made anything !

[@paulbrodie]

I believe you are correct!

[@chrisharding2507]

Paul. You handled those setbacks like a gentleman and a true craftsman. Thanks for showing those of use that don’t have as much self control how to roll with the punches. You never disappoint.

[@paulbrodie]

Thanks Chris. Yes, I almost swore, but caught myself. Think I set a new record for most mistakes in one small project...

[@allanrichards3752]

Its good that you show the real world and not just the You Tube world. I've been model engineering for years and sometimes stuff like this happens. Also some jobs just seem to fight you all the way. The important bit is that you are able to fix it and do work arounds.

[@paulbrodie]

Yes, we are part of the Real World, that is for sure.. Thanks for watching!

[@RonCovell]

Paul - believe me, I know how things can go 'sideways' in the middle of a complex job. Hat's off to you for keeping your cool, and calmly deciding to do what it takes to make things right!

[@SivertBerge]

I have yet to see you make a mistake, so I'm not sure i believe you! ;)

[@rickfazzini22]

I have had many days like that in the shop, these things happen and in fixing the mistakes we have a chance to reflect and possibly learn new techniques during the fixing process. Thanks for sharing that, it always helps to see our educators making mistakes and taking a moment to teach us a thing or two.

[@paulbrodie]

Yes, I had a humbling experience making this hub.. But, I know how to fix things so all was not lost. And we don't hide mistakes from the camera. Thanks for watching...

[@rickpalechuk4411]

Good thing you ordered an extra inch of material! Looking forward to part two. Cheers

[@ivancolon9756]

Seeing you fix mistakes are where the gems of knowledge are gleaned. Also watching you hit the dial indicator and stopping the thread then backing out all in one motion is witchcraft.

[@paulbrodie]

I wouldn't call it Witchcraft, more like many years of practice! Thanks for watching...

[@jobkneppers]

Paul, I guess it was a monday at the shop. In my experience if it goes bad it often stays that way. As a correction I would turn the oD clean and silver solder a bushing around it and then thread again. To butt up against the hub I would use a thread relieve groove made with a small round nose tool with a diameter equal to the root diameter of the thread. Another small tip is to ground a small 90 degree flat on the cutting side of your drill when used in brass, bronze or delrin. This stuff loves to grab the drill as you know. When you just touch the drill with a grinding stone this problem is gone. I had a few of these days in the past too. Just regroup and make it better. The only way is up. Thank you Paul. All the best, Job

[@paulbrodie]

Thanks Job. Yes, you have some experience, I can tell. I machined a threaded insert instead of silver soldering on a sleeve. Either way can work.

[@goober650NX]

That's a very sound, well thought out method that you've given there and is the advice that I'd choose to follow in preference over what Paul did as a fix.

[@guzziwheeler]

This could easily have been edited away, but not Paul! Thank you for your honesty not only to show us your magic, but also your mistakes, which all make who do something. Now I look forward to see how you fix this. Shoutout from the upper Rhine River in Germany!

[@scottsunday4409]

Thanks for showing the mistakes. Makes me feel better that I'm not the only one who's done what you did. I over shot a press fit for a bearing. Fortunately I had enough metal left to make the bearing hole a bit larger and then make a sleeve.

[@paulbrodie]

Yes, it is a very valuable skill knowing how to fix mistakes made in the shop.. Thanks for watching!

[@carlhitchon1009]

That's a really complicated part. I admire your patience in dealing with mistakes and also your ability to fix those problems.

[@dansharpie]

your a wonderful actor paul, you planned to show how mistakes happen and how to fix them, your a (diamond gezzer) xx

[@paulbrodie]

Yes, I am an actor with no script.. Really, I did not plan to screw up so badly....

[@galenkehler]

That clicking the calipers at 25:27... I felt that in my bones. that's a lot of very controlled frustration 😅

[@paulbrodie]

Yes, I could hardly believe I had screwed up Three times in one Project. It's really not like me..

[@JamesDStallard]

I learnt from Keith Fenner that a 2" paintbrush on an indicator holder can be used to prevent any flying brass chips from covering the shop in brass-glitter. Use it all the time here and it works a treat

[@paulbrodie]

Yes, a paintbrush sounds like a very good and practical solution. I have not tried that. Thanks!

[@p5493]

I once said to you Paul, you always find a solution to whatever problem you face, this is just another example. Its also makes the video more interesting to watch, and theres more reason to tune into the next video to see the solution.

[@recoilrob324]

That bronze machines SO beautifully!!! What a jewel like piece you've made! I worked at P&W and we were not allowed to have digital calipers for just the reason you found out. The old mechanical dial caliper is almost foolproof where the digital can bite you.

[@paulbrodie]

Yes, my digital caliper bit me! Bit it was my fault...

[@antcanam]

Hi Paul. As you well know, the man who never made a mistake never made anything. I learn as much from seeing mistakes and their correction as I do from a tutorial. Thanks for showing us.

[@proto57]

It was a good idea to get all the mistakes over with on one project like this, rather than have them spread out over multiple projects! Anyway, the fixes you come up with are as interesting and informative as the creation of the items with no mistakes, if not more-so. I look forward to the next steps...

[@paulbrodie]

Yes, it was good to get all the mistakes out of the way on a single project! Thanks for watching...

[@thegarageetc]

Awesome to see the bright side even though things went wrong, thanks for the positive attitude and look forward to the fix!

[@murdoc6501]

Another great video! Your composure is admirable. Loved how you keep bouncing back after each hurdle. A true craftsman and patience! Go Paul and Mitch, keep moving forward!

[@paulbrodie]

Thank you very much. Yes, I do bounce well, sometimes... This rear hub really did test me. I probably should have looked at my horoscope that morning...

[@christhamilton42]

What's the difference between a tradesman and a handyman? A tradie knows how to fix his mistakes. Love your work and that of your cameraman.

[@paulbrodie]

Good question :) Thanks for watching...

[@racer-vl5cj]

Some days just go like that. On a side note, my dad had a saying " Highly polished, deeply scratched". He was a Tool and Die maker in Toronto and taught me as well. When drilling bronze if you change the cutting face angle on the drill bit with a flatter face it will not grab. Also use emery cloth in the chuck instead of paper to hold the part. I am sure you knew all that anyways. Keep up the excellent work!

[@paulbrodie]

Yes, I have used emery cloth to hold parts in the chuck. but not this time! I like your Highly Polished Deeply Scratched phrase. Thanks for that....

[@weedmanwestvancouverbc9266]

Paul, in high school I was bored with the metalworking projects we got. Some of the kids predictably were making pot pipes, knives brass knuckles ET cetera. I happen to over a book on shipboard weapons and happened to cross something called a blunderbuss. It was from a book in the collection of Captain William Higgs, a well-known family deeply embedded in the tugboat industry of British Columbia. I got the idea to make the Blunderbuss but was put off by how much material would cost but luckily a friend of my family, a guy who was a machinist and welder at Seaspan, found me a piece of bronze forging that was rejected for a propeller Hub due to a flaw in it. In the machine shop after boring Machining off The Irregular Parts Etc I got the weight of it down to about 26 lb from I think about 65 the shop teacher saved all the extra cut off bits to melt down again for more projects The captain bought it off of me once it was finished and tested it out against a sheet of plywood blowing a 2-foot diameter hole in it using bits and pieces of iron and other metallic debris around the ship. He told me typically This Is How They repel boarders coming along sides in boats He bought the finished piece of me and mounted it to his third story reeling on his house and fired it off every Canada day until he was warned about it was warned by the RCP not to do this.

[@tiffinthyme5822]

Hello Paul, I think the cost of the bronze must have been off putting! You know what they say, these things come in three’s! To be honest, it’s encouraging to see how you worked through the issues and showed great fortitude. I am currently working through a very difficult and trying repair, but I am determined to beat the problem, God willing! Thank you for the great video. Best wishes Kevin.

[@LightBranches]

It seems mistakes are like transit buses: none for ages, and then 3 come at the same time. Always a privilege to watch you work, Paul!

[@joell439]

Some days are like that. Remember, the most important thing is you still have all your fingers. The only thing lost was time. Stay safe Paul. 👍👍😎👍👍

[@marcellucassen8033]

You could machine the outside tread on the sleeve before you screw it on, then you don't need a spacer. To make it precise you could screw it on the hub WITH a spacer between the hub and the sleeve and tread it, the spacer (which you can remove later) will give you extra room for the treading tool to tread the sleeve to the end maybe partially treading into the (sacrificial) spacer, if that makes sense.

[@paulbrodie]

Marcel, I see what you mean, but I have already fixed it... Thanks for commenting!

[@brianeggart]

You continue to be an inspiring example. Thank you for sharing even when things don’t go to plan. I get to learn how to make a hub AND how to be a better person!

[@Tanshanomi]

You’ve helped justify my ominous fear of making an expensive, time consuming mistake every time I chuck something into my lathe. I keep hoping I’ll eventually get skilled and experienced enough to be past that, but if Paul Brodie can do it, there is nobody too good to get bit.

[@davidmotoman4956]

As always Paul, Good or Bad you come up with the right fix, Which is teaching One Oh One real world. Love working in Bronze , But chips are crazy, flying every where. Take Care Dave Australia

[@blockhead3654]

Amazing. Supper cool to show your mess ups.

[@paulbrodie]

Thanks :)

[@fepatton]

More drama here than on the daytime soaps! Always good to see how a pro recovers. Me, I would have thrown that hub across the shop and given up. 🤣

[@martymart3681]

Another proof that hero's never quit...good work

[@Hertog_von_Berkshire]

My big cockup on a lathe was to grab the coarse wheel instead of the fine. Rammed the tool post right into the job ruining it and stalling out the lathe. Woke everybody in shop up. 1976, happy days.

[@skyfreakwi]

I feel your pain Paul. I was exploratoryly milling my Aloeis post apart and I went a little deep. Got the stop set and no more problems! (Except for it being shrink fitted and completely jammed up. Hence the destructive disassembly...)

[@orlandoalejandro8940]

In my country we have a saying thats goes something like "Incluso al mejor panadero, se le quema el pan" which translates to "Even the best baker, burns his bread from time to time". No big deal about mistakes Mr Brodie. All mistakes are forgiven coming from you!

[@samvandellen3695]

When you're holding something thin/hollow in the chuck it reduces the clamping force of the chuck because there isn't as much material resisting the pressure from the jaws. I have definitely learned this one the hard way myself.

[@tryphontournesol427]

As a hobbyist machinist I feel that the deeper I'm in the project, the higher the pressure rises. The fear of the mistake that ruins everything. Watching you going from an operation to another is amazing, the concentration it takes to make just one of them would exhaust me for the day. And the way you deal with the mistakes is admirable, much self control.

[@GreggMax]

Some days I make a tool to make a tool, other days I wreak a thing, then wreak it more. By the time I finish, I have a better idea how to start. You are definitely a cool cat.

[@sibazonumpurum188]

What a Man Paul! It'll be so nice if you can talk, one day, about making mistakes and coping with the failures. We all know it happens occasionally at different project stages, and stuff can be quite frustrating. But overcoming frustration and finding a solution for a fix is part of the art. I know first person as here in early stage pharma, mistakes in the lab can get really costly and setbacks are sometimes in a range of weeks of manhours. And, for those at the beginning of their journey, those frustrations can sometimes be a stumbling block to questioning their path...

[@i0am0not0a0number]

I was just saying to myself "I would use the depth stop". If you do anymore hubs I would invest in a Wahlstrom chuck. They seem a bit zany at first but after you use it you will be amazed.

[@phrodendekia]

Well, we would have known how to make a hub, but now we now so much more than that! Thank you for your knowledge

[@siTTinLo]

I appreciate you sharing your mistakes with us. That’s honestly how I’ve learned the most in life is through trial and error. Just a simple miscalculation can be a costly mistake. I’m sure you can salvage it and make it work.

[@TarasSeryy]

Why not turn it down, knurl it, press fit some aluminium on top and then cut the thread? Or braze a sleeve on top of the reduced diameter section to build it up? Or just braze material over the top of that section and turn it to the right diameter? For the threaded end, you should do a thread undercut (as was mentioned by some posts above). ISO-4755 gives some standard dimensions (pictures and tables are searchable without paywall). It has two benefits - no spacer, and no stress concentrator if you radius the flange to the undercut.

[@paulbrodie]

Thanks for commenting. I could agree with some of your suggestions, but not the knurling and then pressing on an aluminum sleeve. I did fix my screw-up; I machined a bronze sleeve that was threaded inside and out. Seems to have done the trick....

[@williammccarthy5696]

Paul , when drilling brass and bronze you should "dub" the drill that is put a flat on the cutting edge so there is no hook angle to cause the drill to pull as it breaks through.

[@paulbrodie]

Yes, if was drilling brass / bronze all day long I would definitely do that. Thanks..

[@JaySiewers]

Yup, brass and bronze is real grabby. It helps to grind drill bits to a wide angle as narrow angled drill bits are suddenly self feeding. Instead of holding the piece in the lathe with cardboard, copper will do better. That lathe guffaw reminded me of when I had to machine a 4" diameter 3/32" wall 304 stainless. The lathe with the 6 jaw chuck wasn't available so I had to use a 3 jaw chuck. Piece was 3 5/8" long so unsteady to hold. I was making .010" cuts and checking the 3 jaw after each cut. On the forth cut "BANG!!!" and the piece was gone. Bounced off the 12' ceiling and clattered across the shop to around 20' feet away. The end that was held by the 3 jaw was basically round, the other end was folded flat like a wedge. I never saw it leave the lathe but saw it falling and clattering across the room. And a fresh hole in the ceiling. Had the micrometer adjuster nut come loose, made a bunch of wrong size parts before I realized. Can't remember if I made them too small or too large. I had to recut or scrap them, some 40 years ago. Always checked mics after that.

[@BillDavies-ej6ye]

Oh, I feel for you, Paul. I know that sinking feeling after cocking up a complicated piece of work.

[@jayedgecombe]

the self control @ 9:30 was amazing, love it. great project..despite the gaffs. 🙏

[@johnkraus728]

Ahh, great show Paul. Thanks for sharing the machining and the mistakes. You handled it well.

[@keithreed5009]

He who never made a mistake made nothing, great work 👍

[@lotus7even]

Thank you for the video Paul it is good to see options to get out of machining problems rather than scrapping a very expensive piece of stock

[@seeburg]

A video of just turning up a hub would have been boring ( see what I did there ?) but to leave in the mistakes and how you are gonna fix them turned this into a great video. Well done.

[@bigsmoke6189]

Ive made up internal mandrels to hold hubs securely for machining ,they work well.

[@ThomasDiFrancesco-Schäfer]

Hey Paul, bad day in the shop. Sometimes shit happens. But with your optimism, you keep things goin'. You're gonna fix it, I'm quiet shure👍

[@edgeorge785]

this guy is the best. i could watch hm all day. . .

[@WhiteMFingRabbit]

This video is a masterclass on how to deal with annoying setbacks!

[@oldmotorcycleandy]

measure twice, cut once rule works once again. But we all do this now and again,. and again, and again. its just a learning curve every day. still great video as always. keep them coming and we will keep watching. Andy from England

[@Metal-Possum]

I think a mark like that in the rear hub would be every bit in keeping with bicycle components made back then. If anything, it just makes it look more genuine. 😁

[@babybopkidsrock5713]

I want to build frames for my kids because of this mr brodie and mr mitch

[@kevindaly5093]

Thanks for keeping it real, Paul.

[@WireWeHere]

Briefly heating below whoops, the spoke hole divot, may offer the silver solder a nice hot flow zone of bronze to settle down.

[@retromechanicalengineer]

Just one of those days Paul. A beautifully engineered hub all the same. Best wishes, Dean.

[@paulbrodie]

One of those days... Isn't that a song? Pink Floyd? Thanks Dean!

[@tairinwheels]

oh man, its just one of those days! at least all three accidents are in one hub, which is better than one accident each in three hubs! definitely not gonna make them in a looong time, and it only cost a shell which you haven't fit the bearings yet! thanks for making good education!

[@MrZX1206]

That last error will work out in your favor. You can make the OD threads, on the repair sleeve, all the way to the end so you don't need the spacer from the original design.

[@roudesign]

That was a real world day, like everyone has...Anyway...My way of turning a part made out of soft metals/plastic mounted on a thin/short/tube wall is to make a temp solid plug (or use an appropiate old ball bering as a plug) so I can tight the chucks properly over the thin/ short wall. And for extra grab on the jaws I use a doubled (2 faces-glued) strip of 220 sand paper instead of stock paper/cardboard. Thanks for sharring your experrience.

[@Billy-burner]

This video has such a monday vibe 😅

[@paulbrodie]

But it's only Saturday....

[@salvadorsepulveda6415]

It happens to the best, knowing how to fix it is the craftsmanship 🎉

[@paulbrodie]

At this stage of my life I do know how to fix, that is for sure!

[@yesjohnny01]

that's the hub from hell.....we all have brain farts....but we either move forward or we can sit in our recliner! I say continue onward!

[@paulbrodie]

Yes, you have the correct attitude. Thanks for watching!

[@chriss8206]

Re machine the hub on the other side for the freewheel. Then you can sleeve the whoops side. I would drill a couple small holes in the sleeve regardless and solder it .

[@paulbrodie]

It's fixed! I made a sleeve with threads on the inside and the outside and it worked just fine. I'm definitely not used to making so many mistakes.

[@glenpiro313]

We’ve all been there Paul! Please keep them coming!

[@HAL_9k]

You added additional value to this bronze with this silver ring ;) And this is an additional story that can be told about this bike that will be built ;)

[@johnjacobs4625]

I did the same thing on aluminum rear hub I made.....had to make a repair sleeve and re-thread it,no big deal...just a pain 😊

[@paulbrodie]

Yes, I have been told that the only person who makes no mistakes is the guy who doesn't do anything... I think that is True....

[@ultimatemonkey]

Ahhh I think we all have projects that go this way ! And it’s always the “simple “ ones , doing operations that we have done a million times before. You sir , handled it much more gracefully than I would have. The cardboard in the lathe, I’d have been frustrated to make a mistake like that, drilling though the flange I’d have launched it across my field and into the pond 😅...... it wouldn’t be the only project in there 😒

[@paulbrodie]

Yes, that was not one of my "better days".. But, we keep moving forward and learning. Thanks for watching :)

[@robertdewar1752]

The centre drill seems to give a nice concentric C/S. Perhaps you could combine centre drilling and countersinking in the same operation when combined with the depth stop? Silver soldering a small bronze plug into the defective C/S could have been an option, but a lot of work...meh.

[@leslieaustin151]

Oh Dear! Or words to that effect… Crumbs, but that was a trial. At least you’re the man who can fix it. I still enjoyed the video as it was the ‘real world’ not the YT world (wherever that is). Thanks. Les in UK 🇬🇧

[@davidclarke3643]

even the master makes mistakes 👍 keep up the great work it keeps the mind strong

[@kevinhornbuckle]

Curtis on Cutting Edge Engineering had to do a threaded sleeve on old cast iron recently. It's good video.

[@johnjewell219]

Know it well going careful and a sudden rush of blood to the head &ooops.good to see you are both still going.regards John 👍😎🐈‍⬛🇦🇺

[@wackygochoco2009]

I don’t think anyone who really makes things hasn’t had a day like that. When I can afford it. After the second whoopsie, I just shut down for the rest of the day. Easier that way than trying to clean up a mess of cascading “events”. I am excited for the wheel build with that hub though. I bet it’ll look real nice.

[@xpndblhero5170]

Just from watching you all these years I figured you'd be the kind of guy that would have a vacuum attachment for the lathe so you didn't get chips everywhere.... Have you thought about cutting the threads in reverse so you don't have to worry about it hitting when going right to left? Edit: You could always look for a different freewheel so you don't need to use the sleeve trick to fix it... They make 13t freewheels for new-school BMX bikes w/ smaller gearing compared to back in the 90s. I always ran 44/16 then moved down to a 36/13 for chain clearance but now they have 21/9 gearing but the freewheels are built into the hub aka cassette hubs or freecoaster hubs... The freecoaster hubs allows for backwards movement without needing to back pedal.

[@morrisonaj]

I admire your restraint.

[@thedr309]

you said you dont normally see the flange...well Mr Brodie from now on every single giraffe bike i see i will be checking!!! actually i have never seen one, dont foresee me ever seeing one so your safe lol awesome work just amazing

[@Impuritan1]

Buy the common sized drill bits you use in those types of materials and then stone the cutting to a small flat. They won’t pull themselves into the material or your material out of the vise/chuck.

[@davidhumphrey1922]

Hey Paul a query about the soak of the brass after attending to the flux. How long do we wait before finishing.

[@paulbrodie]

With really hot, running water, it takes about 5 minutes for the flux to come off. Brazing flux comes off faster than silver solder flux....

[@criggie]

Honestly I learn more from the recovery than from doing it properly first time.

[@marlonterbio]

forgive me paul.. i laughed so hard when you said "what?????" 😅 that's what i do when i make mistakes..laugh at myself..lol but you're only human. that's why i like your episodes. raw. excited to see how you will fix this.😊

[@slimdog72]

One might want more than a coffee after that day. Thanks for showing all your trials and tribulations.

[@paulbrodie]

Any time! Thanks for watching..

[@tomtruesdale6901]

Hang in there Paul, you can do it.

[@onepairofhands]

we all have a day like this every now and again. Bad luck Paul, but thanks for showing your slight errors, it encourages the rest of us that it can happen to experts too !!

[@paulbrodie]

Yes, that was not my best day...

[@michaeljames9671]

Lol that's me in shop most of the time but there's usually injury involved as well. Instead of cardboard try a USD (other currency may work). Very grippy, very tough.

[@stephenwilliams926]

I always back the Drill off with Brass Copper and plastic, in other words blunt the cutting edge of the Drill.

[@michaelsewell3706]

Love watching your videos, very satisfying. Please, at the end of this project, tell us what it costs and also how much the bike weights.

[@dc6233]

It's great to see you make the same stupid mistakes that I do 😂It happens to all of us, and I think allot of us try to forget them and figure out a solution in our heads quickly. But, in reality, until we fix it, we torture ourselves for making such small mistakes that we know could have avoided. I'm a manual machinist myself, always doing odd jobs, and I make little mistakes all the time. fortunately, I'm the hardest person on myself...

[@paulbrodie]

Yes, I understand what you are saying. Thanks for commenting..

[@mountaincruiser817]

Bummer but also made me giggle a little bit, specially when you tried the freewheel. “WHAT”! Interesting to see how you fix these things.

[@rickherrell9451]

Try turning your tool upside down and run the lathe is reverse, that way the chips won't fly up and hit you. That's what I do when turning bronze and cast iron.

[@ccbproductsmulti-bendaustr3200]

Great watch mistakes and all , you rarely make them 👌 Cheers Chris

[@michelevitarelli]

Paul- thanks for sharing this great build. I'm curious if you can tell us what wristwatch you are wearing in this video.

[@sethlyttle]

I think sometimes it's just as enjoyable to see people puzzle solve their way out of mistakes 😅 In regards to the thread, did you consider producing them with a tiny undercut, instead of a spacer? I see a lot of machinists doing their threads that way, but though maybe you were worried about the wall thickness?