Tiger Cub Exhaust Port // Paul Brodie's Shop

[@roberthoffmann6603]

I like your Videos so much. I am 46 years old and know much about Motorcycles but i learn in every Video. Greetings from Vienna.

[@paulbrodie]

Good Morning Vienna! Robert, thanks for liking our videos :)

[@tomfortson2684]

So great to watch your set-up and technique, Paul! 50 years ago, I encountered a farmer who had been a machinist in the military, and he had learned how to do complex machining during his training. He did absolutely amazing work on his farm equipment. It was so much fun to observe him working on his lathe! Loved it! Your skills are just as amazing!!!

[@paulbrodie]

Thanks Tom, I appreciate your comments.

[@836dmar]

The main takeaway from this channel for me is that we can do so much more than we think. Thanks, Paul and Mitch!

[@paulbrodie]

Absolutely! Never sell yourself short. Thanks for watching :)

[@joell439]

Mitch is not out of film...... he's just teasing us for the next installment. 👍😂👍

[@rickfazzini22]

Only thing better than spending time working in my home shop is watching you work in your home shop Mr Brodie! Again thanks for sharing I really do learn something new everytime I watch, your a great teacher.

[@paulbrodie]

Rick, thanks for watching and commenting :)

[@yodasbff3395]

Wernher von Braun said "research is what I am doing when I don't know what I am doing ". You do really nice work, it's a pleasure to watch you.👍

[@paulbrodie]

That's a very cool quote! I am going to try and remember that. Thanks for watching.

[@qivarebil2149]

Probably the wildest ride, a motorcycle cylinder has ever been participating in! 😄 Thanks for the nice video!

[@paulbrodie]

Thank you Ql.

[@TheOldaz1]

That's a nice job right there. Lot of thought in the jig design, then getting the balance right. Thanks Paul.

[@michaelfirth1075]

Paul you take it to a new level.

[@paulbrodie]

Michael, thanks for watching.

[@erikeggenbakstad]

Thank you all, for making another great and informative video. Enjoy the weekend guys!

[@paulbrodie]

Thanks Erik. Weekend was good!

[@joehovanec1985]

You are good Paul. Enjoy your videos. Keep them coming.

[@gman3725]

Love watching you work.

[@paulbrodie]

Thank you!

[@ronhuffman7973]

Wow what a setup! Put on my helmet just to watch! Swapping the head with the 4 jaw was brilliant.

[@paulbrodie]

Thank you Ron.

[@MotoPumps]

Nice! Love to watch how you work out the challenges.

[@paulbrodie]

Thank you Rob.

[@sebastiengarneau3886]

Outstanding Paul!

[@paulbrodie]

Sebastien, thank you very much :)

[@miamatti]

So nice to see the channel up and running smoothly!

[@paulbrodie]

I didn't realize there was a time when the channel was down and not running smoothly..

[@miamatti]

it was never unsmooth, but i remember watching when you had only a thousand subscribers so its quite nice to see it doing so well and such a good community around the channel!

[@paulbrodie]

@@miamatti Yes, the support has been great. We appreciate it.

[@ollimakkonen3721]

Hello Mr. Paul Brodie. You have a new subscriber. I am satisfied that you are a man of some considerable engineering expertise, to say nothing of ability to 'think outside the box'. As my own standards in engineering are at a rather high level, I can appreciate the care and planning that goes into your work. In my youth, I worked on and raced the odd British cycle, and had a bit of a reputation that almost nothing was good enough, at least not so that it could not be improved. Many greetings from a Finnish born, Australian educated Doctor of Mechanical Engineering living in semi-retirement in Indonesia.

[@paulbrodie]

Thanks Olli. I certainly liked how you described yourself! I'm sure we could have a great conversation if we ever got together.

[@ollimakkonen3721]

Thanks Paul. I found your site accidentally, and instantly decided that there's a man alike me. I raced sidecars as a young man and while my greatest success was obtained with a homemade BMW "Rhensport" chair, on various road circuits located in southern parts of Australia, considerable success was also met with a HRD V-Twin Black Shadow sidecar on speedway circuits. Thanks for the kind reply. my best wishes for your future undertakings. Cheers, Olli

[@paulbrodie]

@@ollimakkonen3721 I never tried sidecars, but I really enjoying racing my bikes at different tracks in Canada and the USA.

[@andyfarmer759]

Just brilliant to watch. Thanks Paul.

[@paulbrodie]

Thanks Andy.

[@ccbproductsmulti-bendaustr3200]

Great watching you getting the setup 👍👌 Cheers Chris

[@paulbrodie]

Thanks 👍 Chris!

[@pauldehaan3574]

Once again....nice work.....thanks for sharing

[@djpierred35]

Thank you Paul for sharing that with us. It's always a pleasure to see your work and I would love to have time to do the same in my shop. Since you change the format of your video to 15min, it's too short and we would prefer to have the all story of the exhaust port in one video.

[@alangraham4526]

Well Paul to say you scared me when you fired fired the lathe up with that eccentric weight in the chuck is an understatement. I thought the lathe was going to chase you around the workshop. Anyway good job I did something similar years ago on a 50cc NSU moped that had stripped the exhaust threads, a labour of love as the alternative was walk 3 miles to work!

[@wheater5]

Bravely done and well thought out. I can imagine how badly wrong that might have gone……!

[@paulbrodie]

Thank you. Yes, Lady Luck does smile on me now and then.

[@Alanbataar]

As always, thank you Paul & Mitch. Wow. That was so out of balance! That might have even made a big Warner & Swasey railroad lathe wiggle a bit.

[@paulbrodie]

Thanks Alan.

[@HepcatHarley]

Some ballsy moves there with that head. I've never done an internal single point thread but you make it look easy (as usual) :D

[@paulbrodie]

Yes, a lot can go wrong, but I guess Lady Luck was smiling down on me.

[@dennisyoung4631]

Only did that once - 30 years ago, in machine shop classes in college!

[@daos3300]

tip - reverse the tool and lathe, and cut it on the opposite side, no risk of crashing.

[@paulbrodie]

@@daos3300 Then you need a starting groove on the inside, which basically weakens the part.

[@MegaTubescreamer]

excellent work paul, its been a while since i did any single point screwcutting ,you done good kid !! its been a real treat this whole series so far ! thanks for posting .

[@paulbrodie]

Thank you William. Somehow the video showed up on our Cub playlist, but it doesn't come out officially until Wednesday. Glad you enjoyed it.

[@MURDOCK1500]

That made me laugh. Your lathe was jumping about like my Mother's old twin tub washing machine on spin cycle 😂

[@paulbrodie]

Yes, we had some vibration for sure.

[@MikefromMOMichaelTurner227]

Mike from mo. Here,,i smiled when u turned on the laythe out of balance. 😊 when i ground crankshafts i had to adjust a counterbalance..you had to watch it or things got very interesting 😆 keep up the good job!

[@paulbrodie]

Thanks Mike. Yes, counterbalancers can be very handy when engine parts are out of balance.

[@georgestewart1325]

Totally mesmerizingly brilliant. fantastic channel.

[@paulbrodie]

Thanks George!

[@stef4801]

Good job... Motobécane used this fastening system for its exhaust ... he added a copper seal for gas sealing...

[@davidwilliamson9162]

Love this 👍

[@bingosunnoon9341]

The balancer is true genius. Wow.

[@paulbrodie]

I have other fixtures with balancers, thanks.

[@BIBIWCICC]

Please make them longer. It’s too short and my addiction isn’t fulfilled!

[@paulbrodie]

Thanks for watching!

[@tombrown7449]

"It might work but it might not" I spewed my wine on the screen. I can't say that I never had that thought.

[@paulbrodie]

Careful Tom, computers and liquids don't go well together. I have experience.

[@thebrokenbone]

jesus christ that was a shake :D i´ve said i like your tig technique but your machining is even more impressive, man you do it like if things had to be done by yesterday. thanks for sharing.

[@paulbrodie]

When I was a kid working in a machine shop, my boss would tell customers, " Jobs wanted yesterday have to be submitted no later than noon tomorrow".

[@chrislee7817]

You were on a roll with that thread cutting. The balance factor reminded me of a time as a student when I was making a V twin from a rover V8. I had cut the crank and needed a centre in the end but lacked confidence on the lathe. I was a psychology student using the machine shop in college. Anyway the technician said he would do it, spun the crank too fast and snapped the centre drill off in the end of the crank. End of my project.... 😔 .

[@paulbrodie]

That's too bad the technician screwed up and ended your project. Thanks for watching and commenting.

[@diegobordon6364]

"Things aré gonna move.....!" 😂😂😂😂

[@freiheitfur2takte354]

Perfekt gemacht, ich bin beeindruckt 👍💪

[@heinstrydom864]

Brilliant work thank you

[@WireWeHere]

Fork seal orders are naturally prone to fork ups.

[@johnny787]

Another great video Paul! How does the thread cutting with a single point work..’boring bar motor’ in sync with the lathe speed? I hope Mitch got more film! 😂

[@paulbrodie]

Thanks John. I switch the lever from "feed" to "threading" and the carriage travels at the rate of thread I have selected. In this case 20 TPI.

[@waylandforge8704]

I don't know about your joining your R&D department but your OH&S department would be doing handstands if they saw the way that lathe shook. having said that I learnt a lot without risking my lather or life and limb. Keep up the good work.

[@paulbrodie]

Thanks for watching.

[@glenpiro313]

This was awesome, I am very impatiently waiting for the rest of the exhaust content!!! I thought your “breakthrough” joke was well played, the subtle delivery was perfect.

[@paulbrodie]

Thanks Glen. We have no script. Mitch shows up at 9:30am and we start filming.

[@pm270100]

very nice well done

[@kafkastrial8650]

The pattern parts all seem to need fettling to fit these days, or was it ever so ? I recently brought a set of petrol tank bolts and rubbers for the 56 T110. that were usless the bolts were the wrong length and the 'rubbers ' were like slightly soft plastic with very little compression. in the end I re used used all the old set .

[@naththebikeboy]

Paul, awesome as ever! I was wondering if you turned the thread to a fixed depth, as per a threading chart, or were you using full form threading inserts to make things easier ? Keep up the fun, its great to watch !

[@paulbrodie]

Nathan, I never looked at a threading chart. The DOM tube was .036" larger than the bore, so I guessed and cut the thread to a depth of .022". From previous jobs cutting a 20 TPI thread I knew that sounded about right.

[@rosewhite---]

Get that lathe, fixture and cylinder head to top of Empire State, bolt it to a main girder, set it running and get out of the building before it comes tumbling down.

[@gyrojomo]

Thought about using the back gears to reduce rpm and vibration at cost of increased cutting time?

[@paulbrodie]

I could have slowed the speed for the boring operation, but the threading speed was pretty slow and worked just fine.

[@JohnnieBravo1]

Paul!! Dammit!! First off, I have fallen in love with your channel. You are doing a lot of things I do in my retirement, only I am lightyears behind you. Home machine shop, old cars, old Brit bikes, metal fabrication, design.... too many things to list. But I also HATE one episode.... the instructional on TIG welding. I do stick, and MIG. NOW, after watching your instructional, I have to go buy myself a TIG welder. And I don't have a use for it. But somehow I need one. BTW, might you have any means to locate a center stand for a 1958 Norton 650 Nomad? I need one for mine. Fell off years ago, and I am finally getting around to restoring it, again. Can't wait for your next installment.

[@paulbrodie]

Thank you Johnnie, great comments. You will have uses for your Tig, believe me. It will open up new ways of doing things. I do not have any leads on a centre stand, sorry.

[@tmackinator]

Do you ever set your compound to 29.5 degrees to lessen the cutting pressure when threading?

[@paulbrodie]

I was taught that in school, but I never do that. The new carbide inserts are very sharp, and cut very well.

[@1crazypj]

I trust you used a 55 degree thread to maintain the Whitworth heritage (LOL)

[@paulbrodie]

No, both threads were the standard 60 degrees.

[@billdyke9745]

I think what Mitch said was that he was out of phlegm...

[@djpierred35]

Just for my understanding, why do you equilibrat the all mechanism before putting it in the 4 teeth mounting and not in the final position ? The balance should be done around the final rotating axle, no ? Thank you

[@paulbrodie]

We only have so much time when Mitch comes over to film. And, this was a one off operation so the balance was "close enough" to make it work. If I was doing hundreds, I would have worked on the balance factor more.

[@arupratanchatterjee9893]

Hi,How are you now? Are you ok?

[@paulbrodie]

Watch yesterdays video. It is all explained!

[@jdsstegman]

Machinist fit!

[@paulbrodie]

A good fit is very important.

[@raymaroney8355]

😊👍

[@rogeriocosta1035]

Paul, just for curiosity, did you lately realized that a better balancing should be done in relation to the center of the turning on the four jaw and not the center of the round stock?

[@paulbrodie]

I fully realize the balancing wasn't perfect. When Mitch shows up to film an episode we only have so much time, so it's a "balancing act" to get everything to happen. It worked. If I was doing multiple multiple heads, I would have spent much more time making the fixture look better and to be balanced perfectly. Thanks for watching.

[@WaxMeister]

I'm not sure I have the cerebral horsepower to do that - great problem solving and strategies!

[@paulbrodie]

My projects gave me a lot of problems to solve, and I developed skills over several decades.

[@wanmuhammadfakhrullahwan8078]

👍👍

[@peterduxbury927]

When you first turned-on the Lathe, even my Computer Desk and Monitor started to shake, and I'm in Australia.

[@paulbrodie]

Good Vibrations!

[@franccoch4676]

you rather do R'n B with your lathe aren't you ? :-D

[@Henrik.Yngvesson]

Edit: Never mind, the threading was the reason you did it all on the lathe instead of the mill.

[@paulbrodie]

Yes, you are 100% correct. It all makes sense now, right?

[@xpndblhero5170]

You definitely have some unique ideas for getting around a problem but wouldn't a mill work better for that instead of spinning it in the lathe¿?

[@paulbrodie]

How do I cut a thread in my manual mill? Only CNC can do that.

[@xpndblhero5170]

@@paulbrodie - I'd be trying to make a custom tap before I'd spin a head in a lathe, that's just scary and I feel like it would break something or it would shake itself apart.... I don't even want to think about how much that would cost or how hard it would be to change bearings or something on the lathe. 😩 I'd probably only try that if someone showed me exactly how to do it w/o breaking the lathe or myself in the process... 😆

[@paulbrodie]

@@xpndblhero5170 The tricky part is dis-engaging the feed and moving the tool out of the way at EXACTLY the right moment. You can see it in the video. Both hands react at the same time.

[@xpndblhero5170]

@@paulbrodie - Yeah I seen that, here and in a few of your other videos, it's an impressive skill.... I know it's an expensive "hobby" but it's still a skill I'd really like to learn at some point in my life.

[@GPgundude]

Who is Mitch?

[@paulbrodie]

Tony, you must be new here! Mitch is my Videographer.... The Best!

[@gregbernal3237]

You be better off checking it up in the drill press and getting it done

[@davesalter4928]

Did you tell the poms you were using HD forks not standard forks by the way 15 minutes goes to quickly.

[@paulbrodie]

HD forks? I'm not sure what you are referring to...

[@davesalter4928]

@@paulbrodie Your 25 September episode you showed the heavy weight (HD) forks you had received and were fitting in place of light weight forks which has a larger diameter. you must have ordered for light weight instead of heavy weight.

[@paulbrodie]

@@davesalter4928 You may be correct, but I seem to recall the lightweight forks only have an o-ring to seal the oil in. I would have to check the parts book to be 100% sure.

[@gregbernal3237]

You'd be better off doing that in the Mill and be safer

[@paulbrodie]

How do I cut a thread in the mill? I'm not at that stage yet...

[@roberymcgoff1904]

Sometimes you scare me with that lathe of yours. I shouldn't have to put on safety glasses to watch your videos. Do you think a tapperd thread would work for a exhaust. Such as a IPS thread. Nice bit of work. EMMA

[@paulbrodie]

Cutting a tapered thread on a lathe is not easy. I have never done it; I believe you need a taper attachment, which my new lathe will have.