Liebherr - Increase rope´s service life by hoist rope cut-off 

Here's the more important lesson: Use this idea on ANY thing that has a spool. The same principal will apply to all spools. That's why I watch these kind of videos. I have a boat winch that has this same problem. Now, I know to solder the cutting point first, something I never would have thought of. Then apply the 20x diameter rule and change the wear pattern on the spool. Just saved me a ton of money!

@@valuedhumanoid6574 im about to make a farmers eye and soldering the end like that is really neat, i wouldnt of thought of that either.

yeah!

And you watching this because..

Haha, I was thinking the same thing.

That sums up these kinds of industrial videos and why I love them.

an older engineer would have known that it is much more lucrative to sell a whole new cable than few hours of work.

@@vallevaan *economist*

More likely an accountant/manager demanded just the bad section be cut out ;) after all it's cheaper to allow the insurer to pay out for a claim than the owner perform maintenance.

How do you know how old he or she is?

@@lariwoo They're not cutting out a bad section.

If you need an operator I'l be available.

Greetings mister rodgerson, can you give me an example?

The calculation and formula can be found on drilling formulas.com here is and example of ton miles for a round trip (a round trip is running drill pipe into and back out of a well). RTTM = (Wp x D x (Lp + D) + (2 x D) x (2 x Wb + Wc)) ÷ (5280 x 2000) where RTTM = Round Trip Ton-Miles Wp = buoyed weight of drill pipe in lb/ft D = hole measured depth in ft Lp = Average length per stand of drill pipe in ft Wb = weight of travelling block in lb Wc = buoyed weight of BHA (drill collar + heavy weight drill pipe + BHA) in mud minus the buoyed weight of the same length of drill pipe in lb ** If you have BHA (mud motor, MWD, etc) and HWDP, you must add those weight into calculation as well not just only drill collar weight. ** 2000 = number of pounds in one ton 5280 = number of feet in one mile

The point where rope rubs against oneself at full tension is only at certain intervals along the rope. Unspooling and shortening the rope moves all those points off that full tension intersection.

@@rokadamlje5365 That clears it for me! Thanks for the reply!

@Jimmy De'Souza The scrolls of the drum are machined in different ways. At points the rope lies parallel to the rope below and at others it lies across at an angle.

@Jimmy De'Souza ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-5dGcoAP9XA8.html Watch from about 40 seconds. There's a clip that illustrates my point better. It's an obvious change in the way the rope spools on to the drum.

maybe he is not a soyboy like you

You need glasses. He was wearing ear plugs.

@@Balenza345 Earplugs are usually not "white guy flesh colored", so I doubt he's wearing them.

@@1sydman1 Insecure?

@@robertbritton656 no just a soyboy that has periods.

10 minutes is an exaggeration but yes it's faster than what was shown in the video

Stuff like this can easily be scheduled in, so there's no loss of sales. This is just maintenance, which you always schedule in anyway. 2 hours of work is not a lot a long time to do this work. I'm not sure how you came up with the conclusion about the figures, but how did you? Renting a crane like this only costs a few thousand dollars a day including operator. Nobody is losing any significant amounts. The crane will only have a downtime of 1 working day at the most. The point is still the same - company that plans maintenance should not expect unforseen loss of big contracts. No company has full demand on their equipment anyway, unless it's rented out on a longer term.

I imagine Leighberr are bit more professional than you though Blue waffle

You shouldn’t torch or weld on an oily machine with lubricant and electrics everywhere around. Everybody does, however Liebherr must show the correct way.

And... spooling the cable of such a crane all the way out takes already 5 mins or so, depending on the length. I guess you worked on much smaller mopeds.

Maybe if you didn't skip to the end, you'd get it.

☝️ lol this takes win😅

Removing 3 feet of the rope moves the entire rope along the drum therefor it no longer rubs on the same places against itself. So it prolongs its life.

They let you work with cranes??

@@davidlol1983 So how often do you need to do this? That's 3ft less of rope left then another 3ft off. then another 3ft off...lol soon you don't have enough rope length anymore....

It's so us weekend warriors can use this technique for our every day crane needs.

The rope is longer then necessary to make it readjustable

@@alexanderbreitschaedel9070 but is there any reason to readjust it? & what I dint understand is now that they have shortened it they obviously can't lengthen it in the future. so they have to buy a new one again? which doesn't make any logical sense

@@AmateurPetrolHead it could once be readjusted. Readjustment is to distribute the pressure on the drum to other parts of the rope so the rope doesn't get flat where the rope layers touch each other

@@AmateurPetrolHead The rope is longer than it needs to be when it is new . In this case they only removed about 24 inches . And that is nothing to worry about . I'm sure they can do this more than once . Bu the whole idea is to realign the high stress areas of the rope so it will increase service life . To make it easier for you to understand if the life is say 25 thousand cycles . Do this will double it . And without the labor a rope like that cost tens of thousands of dollars . So it is well worth doing it . Keep in mind this only holds true if the rope has not been damaged along it's life for other reasons .

@@lhr1701 ah, okay. thanks for the explanation