Ny-Lint Mobile Dragline Conversion
 

Just getting started converting my Ny-Lint crane, so here is the conversion thread.

I have a question for anyone with thoughts on the original construction method.

I don't see any obvious spot welds or other signs of how the various steel parts are fastened. Was this old stuff glued or welded or what?

I want to try to keep it looking like the old toy without destroying it in the conversion process. I would love to pop the lid off the back of it for storage and access during the conversion.

http://i1291.photobucket.com/albums/...psb0f03728.jpg



Jim

Re: Ny-Lint Mobile Dragline Conversion
 

I see you're starting the flea market buy you picked up . I never fooled with my Nylint crane but most of these are just spot welded together. You may have to find each weld and grind through one layer but that would burn the original paint.. Then you'll be welding up a hole and repainting .of course.

Re: Ny-Lint Mobile Dragline Conversion
 

I bought a set of these heli spur gears for this project. Nice to have a good hobby shop in town for all sort of stuff like this, I hate trying to find something like this online. I never know what it will look like for sure and can't tell if it has any chance of working out in a project.

Support your LHS or you will regret it later in life....;)

http://i1291.photobucket.com/albums/...psebfd369c.jpg

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

old metal toys are stamped tin. should be tabs to bend/move etc to open up parts. could be spot welded in places to.

Re: Ny-Lint Mobile Dragline Conversion
 

Jim-is it too late to see a picture of the complete model before rebuild starts?

Re: Ny-Lint Mobile Dragline Conversion
 

Tom, i think i have a picture of the poor thing before i was let loose on it! :p

http://i1291.photobucket.com/albums/...ps6b94ea13.jpg

I always like to see progress on build threads, so here is what I have so far and it is only about noon!

I have three servos mounted for drums. The bottom two will be hoist and crowd with lines coming out the front. The third drum is going to go up thru the roof and around a pulley, then up to the boom tip for boom control.

I'm also planning a double pulley down at the bottom of the boom for the crowd line to run thru so I can get the line down low when it comes out to a drag biucket.

http://i1291.photobucket.com/albums/...ps4cf85e67.jpg

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Thanks jim-I have not seen one of these This should make a nice project. Is this going to be a dragline only or drag & clamshell ?

Re: Ny-Lint Mobile Dragline Conversion
 

Tom,

I am planning to make a drag bucket for it. I would really like to build a crawler undercarrige for it and maybe make it convertable between the motorcrane and crawler, but that is probably a big task and will not happen riht away.

I may try my brass clamshell on it, but I think it will look too small for it.

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

looks good. If you want it self contained (no running wires or power etc through the turn table) put the 4th servo for spinning in the top half there. Did that for my unit crane. works awesome. batteries double as ballast lol

Re: Ny-Lint Mobile Dragline Conversion
 

Very cool build! Can I see your drum and cable setup? I am building a machine what will have lots of drums and cables and im curious to see how you set everything up! ;)

Re: Ny-Lint Mobile Dragline Conversion
 

Jo,

I'm not quite to that point just yet. I just started turning pulleys today and I have find a drill chuck for the tail stock on the lathe before I can center drill them or the drums. I'm not sure if you can tell from one of the pictures, but the drums for the hoist, crowd and boom will be positioned in the center of the "window" right off the gear end of the servos.

You may be able to find more on the unit crane build done by small haul. He has a few pics showing the same sort of thing that I'll be doing.


I hope to be mounting drums in a few days so stay tuned, I am sure to post more pics when I get it to that point.

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

I got several pulleys and two rope drums turned on the lathe in the last day and a half. The first drum (the one I stuck in the cab for the picture) is going to be too long, so I turned a shorter one. I support the far end thru the cab and space them somehow.

I'm happy with the pulleys, I am going to need a couple more of them. They are tougher to do than the drums for me anyhow. I don't have any parting tool stock so parting them off is a pain. With the drums, I just start with a section of stock that is just oversized and then I can face it to length.

http://i1291.photobucket.com/albums/...ps3f65f264.jpg

http://i1291.photobucket.com/albums/...psad1473f1.jpg

Re: Ny-Lint Mobile Dragline Conversion
 

First video of the Nylint crane! Boom lift goes wrong!

The stick on the first lift is about half, second was full throw. I'm going to do some more testing, not sure if I'm still going to do four part line or maybe just two and use the stock pulley that is on the boom tip now. The thread I'm using is just a bit springy so I need to try some other stuff there.

http://youtu.be/38xs8Tdj9uw

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Looks like you are making some progress jim- I see you are learning the machining side of modeling. It's fun as a hobby but I think you will find that buying tooling is a never-ending process. I have had my lathe for 25 years and I still don't have everything I need but I just get something when I realize I cannot make a part without buying something else. I guess you got lucky on the boom fail. Booms crashing usually cost millions of $$$ :D

Re: Ny-Lint Mobile Dragline Conversion
 

Here is a video of the four rope configuration. I need to make bushings and adjust the frame for the cab pulleys and I'm going to move the boom tip location to clear better, but otherwise I like it.

http://youtu.be/Qg0TuI-uW8M

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Jim, this is looking good, I'm following close as I have the same unit sitting on the table waiting to be converted. Won't get done any time soon, there is about 5 projects ahead of it.
So what actually failed, it looked like it spit the boom drum out?

Kent

Re: Ny-Lint Mobile Dragline Conversion
 

Ya, I only had it friction pushed onto the servo with no screw or anything to hold it. :)

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Oops :rolleyes:

Re: Ny-Lint Mobile Dragline Conversion
 

hey if you want some better line to use try nylon string it's pretty strong but im not sure how much clearance you have around the drum

Re: Ny-Lint Mobile Dragline Conversion
 

Making some progress on the crane. Got things aligned pretty good now, found a local supplier for stock so this morning I was able to turn a larger drum for the hoist. I think it will work fine, it is 7/8" stock and I turned the flanges fairly low so the inner diameter is still a bit more than 5/8" which gives me a drum speed that should work okay for the hoist and crowd drums. The larger diameter also helps to hold more rope making the storage of rope fit on one wrap.

I drilled out the top gear on the servos and taped them to 4-40. Then I run a machine screw from the inside of the gear so that is what you see poking out the top. Then the threaded drums screw onto the stud of the servo. This make it easy to screw the drum on or off of the servo for fitting, testing and maintenance.

Thanks go out to Scott (SmallHaul) for all the tips and help along the way!:chug:

And, I love the lathe! What fun! If you have ever thought about a small lathe and you like working on the sort of stuff that brought you to this site, I say go get a lathe.

http://i1291.photobucket.com/albums/...ps38c68019.jpg

http://i1291.photobucket.com/albums/...psed751025.jpg

http://i1291.photobucket.com/albums/...psae7c8a8c.jpg

http://i1291.photobucket.com/albums/...psd2e9de7a.jpg

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Video checking the clearance and position of the two low end pulleys for the crowd rope. I'm thinking about making a fair lead for the crowd. If I can position the rope out front and down low, and I can make the holders for the pulleys? I think it would look cool, if I can make one that isn't too far out of scale for the machine.

http://youtu.be/LIUX2lDLoxs

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

the dogs like whatever!!! looks good

Re: Ny-Lint Mobile Dragline Conversion
 

Looking good jim. Does your lathe have thread cutting capabilities? If so, you could cut laggings in the drums to keep ropes from crawling on top of each other. May not be a problem on this. The fairlead idea is good. All draglines look good with them and they serve a good purpose. Have you considered what scale this model might be?

Re: Ny-Lint Mobile Dragline Conversion
 

Tom,

Thanks, I have a bunch of work left to go. I can't cut threads, I think I have the drums set up square enough that the ropes wrap pretty good.

I think the scale is 1/18th.

I'm turning two pulleys for the boom tip and then I'm going to rig it up with my homemade clamshell bucket. You might know my style, I love to get it to a point that it runs, then play with it, I mean TEST it, and then do the finish work.

I am planning to try the fairlead and see how it looks.

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Got the crane pivot servo working. Not completely satisfied with the pinion to servo attachment. I am afraid it won't be long before the threaded bolt comes loose in the top gear of the servo. I did have a nut on the top of it but didn't have enough clearance for the pinion above the truck body, so I had to remove the locking nut. Also the pinion does not fit on the thread of the 4-40 perfectly, so the pinion is not perfectly true and wobbles just a tiny bit.

http://youtu.be/_4BFGXFBoYg

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

looks good, are you going to have enough power
to swing when the bucket or clam shell is full of dirt?

Re: Ny-Lint Mobile Dragline Conversion
 

BigFord,

Ya, I'm pretty sure it will be plenty. I have the radio turned way Dow to make it smoother and slower looking.:rolleyes:


Been sitting here monkeying with the TX trying to figure out how to engage or disengage the boom control using the throttle cut function. I have the radio programmed as a heli and the boom up and down is on the throttle stick. I can't quite get it to work the way I want. Gona have to dig out a manual I guess.

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

good luck with that. I read the manual once only once!!!

Re: Ny-Lint Mobile Dragline Conversion
 

hey may i ask what is the diameter and thickness of the turntable gear you have there

Re: Ny-Lint Mobile Dragline Conversion
 

Speedy,

It is a stock Trex 500 heli main gear. I'll measure it tomorrow. Probably find the specs online. I just grabbed it off the shelf a year ago knowing it might work for such a project,

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Speedy,

The gear measures 3 7/8" x 1/4". It is actually too big in outside diameter for this particular crane but it works. I think perfect would be just big enough to fit around the steel bearing ring on the bottom of the crane house. Also, I custom made the spacer hub for the center to fit the steel center post and cone shaped the outside diameter to center up into the middle of the plastic gear.

The picture doesn't show the top of the rule, but it measures 3 7/8":rolleyes:

http://i1291.photobucket.com/albums/...ps215711b6.jpg

In this picture you can see the wear mark on the truck bed where the bearing ring rides. That shows how much too big the new plastic gear is. It doesn't stick out and doesn't look bad so it works for me.

http://i1291.photobucket.com/albums/...ps0af6cf05.jpg

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Here is a short video of the first heavy lift of the crane.

http://www.youtube.com/watch?v=LvqALyTyGYo

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Looks good jim-you seem to have plenty of power and you probably couldn't build a drag bucket large enough to carry that much weight in dirt. However, watching the video it looks like your boom angle will control the amount of weight your carry. That,s okay, you will just have to be careful with the boom when carrying dirt. Keep at it!!

Re: Ny-Lint Mobile Dragline Conversion
 

Tom,

Thanks, the truck is pretty heavy and I have good counter weight in the crane so I think it will probably be able to dig with the boom level.:p. The big problem I will probably have will be clearance for the crowd rope around the truck body, even swinging off the sides and rear. When I started mounting the slew ring I was not unhappy to let the crane ride entirely on top of the plastic gear because it give me another 1/4" of height to improve the clearance.

Now, to work on the drag bucket and thinking about how to power the truck.:rolleyes:

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Jim-when you say crowd rope, do you mean the drag rope. If so the correct placement of your fairlead might solve that problem.

Re: Ny-Lint Mobile Dragline Conversion
 

Tom, ya that is correct. I will see how it goes and start on the fair lead once I get that far.

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Getting the drag bucket looking good. Hung on the machine to see how the size of it looks. Few adjustments and such and this thing will be moving dirt!

http://i1291.photobucket.com/albums/...psd372b7fa.jpg

http://i1291.photobucket.com/albums/...psb05027d9.jpg

http://i1291.photobucket.com/albums/...psdf7d3f3f.jpg

http://i1291.photobucket.com/albums/...ps0cafe306.jpg

http://i1291.photobucket.com/albums/...psdee91131.jpg

http://i1291.photobucket.com/albums/...psf198b7b7.jpg

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Nice work jim- smart decision using brass. I used steel on mine and it was really hard to braze all the parts on it. As it got heavier it acted like a big heat sink. Do you know what this bucket weighs? I had to add weight to mine at first but after I got all the mounting points correct the weight was no longer needed. I see you have no adjustments for your mounting points. Hope that works for you but I had problems with this. Watching for the video. You work fast!!

Re: Ny-Lint Mobile Dragline Conversion
 

Video...

http://youtu.be/-n7tb6cv77A

Re: Ny-Lint Mobile Dragline Conversion
 

Nice job Jim, I only hope mine turns out working half that well!:jaw::jaw: