How to straighten a bent drive shaft - Sailing & sailboat maintenance Ep 248
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- čas přidán 14. 07. 2024
- The idea was to get the shaft and whole drive system back in place...
00:00 Replacing the cutlass bearing
00:36 How to straighten a bent drive shaft
02:38 How serious is the problem and how did we bend the shaft?
03:46 Productive two days: shaft back in place, flexible coupling back on, Liz finished the seacocks and is working on the dinghy cover...
05:31 Ad
05:32 Re-aligning the flexible coupling
06:37 PSS Dripless seal installation
07:32 CZcams algorithm
08:54 Nearly ready to anti-foul the hull
09:08 Putting the Max-prop back on. Dismantling the max-prop: • How to dismantle the p...
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Peace and fair winds!
Liz and Jamie
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#sailing #maintenance #boatyard
There was a young sailor from Kent
Whose shaft was unexpectedly bent
To save any trouble he put it in double
And instead of coming he went...
🤣 Sounds like the kind of limerick I'd expect to hear from Roy. 😁 Liz
Cheers mate. Needed a laugh this mornin.
Only started watching you're videos and I'm loving you're work I'm finding it very educational
Thankyou
Appreciate you swinging by and for the feedback, David. Enjoy the videos, there's plenty of them!
Jamie, you cannot even count on the bell notification as even though I have it selected I still do not get notified. Since I know when to expect a new video, I always check your channel to see if it has been posted. As for your shaft not being straight, it can come from the factory not being true as they will have a tolerance of + or - off of true. It might not be much but in time it causes wear on the bearing and vibration. Your talented machinist has most likely worked wonders for the shaft.
Cheers for letting us know, Ron. It's very disappointing to hear that loyal subscribers are not getting notifications. 😳 I publish new episodes to FB, Insta and our own website to help our followers know about new videos, but don't know what else I can do! Liz 🙏
followtheboat.com/blog/
Max props are wonderful...and the new Max Prop Easy is an amazing improvement. Changing the forward and reverse pitch is so easy I do it simply snorkelling, two size allen keys and swapping different length hex bolts marked to the pitch takes only a few minutes in the water. Annual greasing in the water is a breeze too. PYI sent me pitch bolts from 12 to 28 degrees becaue we couldn't agree on the expected pitch with repowering. I started low and kept increasing pitch until getting a little black smoke at max rpms reached at max throttle.
Best single mod (along with the dripless shaft seal) to any drivetrain for a sailboat.
West side (Malaysian side) of Borneo seems like a good choice for your hideaway from typhoons and hauling out. You've shown us more of Borneo than seen in many cruiser's vlogs, thank you!
Hey Bruce, thanks for the great comment. Elsewhere I've mooted the idea of returning to a fixed prop but the new Maxprop you describe sounds interesting and a lot easier to use too. I am convinced our prop is not performing as expected and taking other comments on board it's possible our prop is mis-aligned due to hitting something under water.
Again, kudos to Jackson -- and all done by eye. I think of those few remaining piano tuners who, eshewing those electronic gizmos, do it by ear. I asked one about it and she answered (aptly, given your vlog): "Once you have Middle C, it's smooth sailing." Thus:
🎼⛵ ...Best regards, Daniel Wardin
Hehe, love it 👌
There's clearly some talented guys in some of those boat yards!
There certainly are. There are a huge amount of boats here, so they've got to be. 🤓 Liz
Surprisingly interesting for this mechanically challenged nitwit. Well done!
It's all interesting stuff, and when you have people around you who know what they're doing armed with the right tools, it's fun too. Imagine having to deal with these issues in an emergency in a location with no resources though 😯
"Is your shaft bent" brought tears to my eyes until I realized you were talking about your boat. ^L^
That thumbnail was my handiwork, but you should have seen a few of the unpublishable versions I did before this one... 🤣 Liz
@@followtheboat the perfect "thats what she said".
The trouble with working with Stainless Steel is that it has about 9% spring back, that is why it was bending so much for such a small amount of out of straightness. It’s possible that the shaft could have been bent with bad support of the boat when out of the water at some stage. Apparently a boat can flex quite a lot when poorly chocked. In future check the chocking so there is no stern sag. Perhaps use a string line from the keel and take a vertical measurement to the transoms tip once the shaft is in and turning freely before refloating, then some time for amusement see if you can do the same again when the boat is in the water. If you have to do that in more primitive situations shafts can be straightened with heat, but you really need to understand what you are doing to pull it off. Thank you Jackson for your skill.
We knew of a 60ft boat that had to jack up the back end for two months because it had sagged so much he couldn't reinstall his shaft. Prop misalignment could very well be the cause of our issues.
Jamie having just finished view your last two films, great work.
I would, if I were you, consult with Oyster about your shaft strut ("p bracket"). I believe they will advise you to replace the entire strut assembly due to the high to very high probably of failure due to unseen, internal fracturing on the internal side of the strut and the greater degree failure with the wielding repair on the observable side. In addition, your insurance provided may invalidate or disallow any claim, if this component is involved in some shape-or-form.
Hi John. I think there are a lot of things on the boat that Oyster would recommend replacing. We'll be keeping an eye on this.
Glad the shaft went back in ok Jamie. That P bracket repair is still a concern though. Keep your eye on it. Hope you and Liz are doing good. You both look fresh and in good spirits. Cheers.
Yes, it's become an ongoing concern and something we'll keep an eye on. Hope you are keeping well 👍👍
Jackson to the Rescue👍 Liz is a “Handy-Annette” & More Repairs/Maintenance Jobs-Stay Safe & Enjoy😎
I'll have a go at anything that's thrown at me, with greater or lesser success! 😀 Liz
Have your propeller blades been checked for being the same weight? An out of balance propeller could bend a shaft. Excellent segment. It was over all to quickly, an indication of good story telling..
Cheers, Henry. And no, we've not done that before. Good idea 👍
@@followtheboat and or one blade slightly bent????
Thumbnail for me got me clicking quicker then ever🤣... another great video...
Nice one, Darryn 🙏
The weekly ringing of the bell. 🔔 I never miss an episode.
🙏🙏 Thank you!
Another great episode. I can't wait until our own haulout is finished and behind us. A few more weeks and we will be experiencing the glorious bottom sanding, cutlass bearing replacement, and figuring out why our prop is getting loose. We might have a new prop and/or driveshaft in our near future. A couple of boat bucks should set it all straight.
Sounds like we're in the same boat 😁 Good luck with the work and hope you guys splash safely.
Wow Jackson is really skilled to straighten out that shaft.
Thanks that was an interesting episode best wishes from London.
Thanks, Russ. Best regards to London. We miss London and the UK 😔
Hi , if you could get yourself a nice little tool called a needle dial indicator with a magnetic mount you can place the little needle from this dial anywhere on the shaft and read off the degree of play in the shaft from the needle dial , it’s a toolmakers tool and you can get one for thirty dollars and it’s highly useful for measuring whether any shaft or bearing or pulley or anything that turns is out of alignment it’s quite useful for that particular job even if you only use it now and then .
Hi John. Is that the same instrument Jackson was using at the press, or is this a guage with a dial reading?
You should fit a Brunton Autoprop Jamie... Absolutely the best. Contact them, tell them we sent you. Sail Safe Guys, Ant, Cid & the pooch crew.
Hi chaps. How does it differ from a Maxprop? If it comes in at under £1k, I'm interested, otherwise it's back to fixed prop methinks.
@@followtheboat Jamie I will send you an email 1mb OK?
@@SVImpavidus cool, thanks guys 👍
Thanks guys!
You're welcome, mate. 🙏 Liz
I have been accused of having a bent shaft before. Been trying to straighten it out ever since my adolesence
Don't go blind
Have you considered putting a GoPro on a stick and recording the prop's performance while underway? WiFi doesn't work through water so you won't be able to see it in real time, but you could record a minute and watch it back.
Hi Paul. We have done this before now, though it was only for creative purposes. It's a good call and something worth trying out.
Wow, no digital readout. Amazing 😂
I thought the variable pitch props were used on engines that are running at 1 speed only. The most fuel efficient speed for the engine. It's changing the pitch of the prop that changes boat speed. Complex system indeed but an incredibly effective fuel saver even when motoring.
I think it's overly complex and we're now considering putting a fixed prop on.
@@followtheboat It would likely have a negative impact on how far Esper can go between fuelling stops when you need to motor instead of sail. It's a trade-off, easier to maintain as a functional part of Esper for a loss of motoring range.
Hmmm, and let's not forget we do a lot of motoring in SEAsia, but I'm not sure I understand how a feathering prop can be more efficient under motor. I thought their efficiency was when sailing, reducing drag.
@@followtheboat variable pitch, if you can set the pitch which most you can, gives maximum push at engine peak fuel economy rpm. A 1 speed engine where throttle control is actually pitch control.
Need to crawl in a marina, the pitch is so slight you are barely moving, yet the engine is at it's perfect fuel economy rpm. Need to pull / push hard the pitch is adjusted for power, speed is yet a different pitch. Through all uses, the engine is purring at it's perfect fuel economy rpm. That is how they gain efficiency under power, the engine isn't ever wasting fuel with bad rpm rate.
I have always done things by measure, But i have seen things done by eye that have amazed me, Having said that i would not recommend it to anyone
Jackson's a wise old guru. 🦉🛠️⛵ Liz
Jackson has some serious skills. I have tried to straighten things in the past but I have never been successful.
I’m really surprised sailors don’t do a shaft runout each haul out. Another thing that should be done is having your prop balanced as they do get out of balance from hitting debris like trees and nets.
Logs in the water are a big problem round here, they're one of the most important things we look out for on watch and one of the main reasons people prefer not to sail close to shore at night. 🙏 Liz
👍!!!
👌
Hey Guys, hearing about the new PSS seal causes me to remember my own installation. If I remember correctly a new seal can take some time to bed in and fragments can come loose between the steel and the rubber seals causing some ingress. Easily fixed when you know that, PSS have a video on this from memory. Bear it in mind that this may be the cause if you find some water in the bilge. The PSS is a really good product overall IMO
Jamie, glad to see your shaft was straightened out! You did an excellent job of polishing it as well! I couldn't help but notice your "dripless" cover was ribbed. Does that enhance performance? (asking for a friend)
Hehe, I had to go for the small size 😉
The subscriber comments seem to be bent on making fun of your episode this week hehehe.
thumbed
How dare they! We did ask for it though 😉
Yes but it sorted itself out when I started dressing to the portside
😂😂
I didn't see how the motor shaft lined up to propeller shaft, paralleling and angular
Youtub algorithm ugh. Can be as annoying as a engine on a sailboat with all the maintenance and issues that come with motorized propelled vessels.
Good video 👍
They're all good when it's all working, but then consistent maintenance is what keeps it ticking over, I suppose.
I do the same thing with trombone slides, but the press is my hand.
Oooh err! Best keep that to yourself, Daniel 😂
@@followtheboat hahahaha 😂😂😂😂
Sailing followtheboat vlogs🌍⛵️👍.
😀⛵😉🎣😁🙏
Confirming you have been hard to find on CZcams
How did you find this vid, John? Would be interesting to know... Good to see you here, by the way! 🤓 Liz
The best clickbait title, ever! 🤣🤣🤣🤣
👍🤭😀
Excuse me sir, is YOUR shaft bent? Let me have my coffee first lol!
Answers on a postcard, please 😃
As an answer to the question in the title card:
Yes. In matter of fact my "shaft" is bent, indeed. When I was a little child my parents noticed I had problems to aim my pee into the bowl. I went trough a surgery, which mostly fixed the problem, but my "shaft" is still a bit bent.
Sorry .. bad humor .. but couldn't resist...
The shape of the tool doesn't matter as long as it gets the job done. 🤭😀 Liz
Thanks for the video. I am sure you posted this with good intentions but this is not how you check a shaft truth / runout in the 21st century. Jackson was doing this by eye however good his eyes are? You need a DTI clock (dial test indicator) at the very least to measure the deflection so you know were to correct and by how much. Today lasers and laser alignment between shafts is more common. The method he used is what would be applied to slow running, less than 200 rpm, large equipment like mixer / agitators with shafts spanning 8+ meters in length. The shaft should of been checked between centres, that you had on the shaft on one end (shown in the video) so I am sure would of been on the other end as any good machine shop would of done when manufacturing. I am an engineering to trade so i know this is right / fact, not down to a mater of discussion. I would agree you don't need laser alignment as most couplings take up small alignment issues but you do need both shaft to be true. The method Jackson was using is what was done back in the 18th century I appreciate you are both sailors and you have to take the advice given by experts but on this occasion I have to say this is wrong, and more so you are posting a video that may mislead others. Google / check what i have said, love the chanel, you have given lots of good advice in the past and posted great content. Not out to attack you just want to let you know this is not right.👍🏻
While I have no reason to disagree with you, this is as good as the technology gets here in Sabah... 😉 Liz
@@followtheboat HI Jamie I live in Indonesia and half agree with you about things being as good as it gets in some places. But I checked how much a magnetic support dial gauge was here on Tokopedia. 225,000IDR and up a bit. Jackson has real talent but for the sake of $16 it could be done quicker and with less reliance on mark 1 eyeball! A yard like the one you're in, with some fair engineering equipment, like the press Jackson was using, should be able to afford a $16 dial gauge. Tokopedia is available in Malasia and Thailand as well it seems. The app is in English sort of, (after going to the very bottom of the log on page and finding the English button) but only on the computer version. You can get anything from Tokopedia, even Marmite!
Like you, I have been to very remote areas here a lot, but still the yard you are at isn't that remote and they certainly can get deliveries. Love the videos hope it all comes together soon and you can get back in the water soon.