Re: Ny-Lint Mobile Dragline Conversion
 

Modified the drag bucket with a new heavier bottom that integrates the teeth into it, added chains but the are too short, adjusted the dumping line to be a bit longer. (What is the name for the short line that runs from the arch to the pulley and then to the crowd rope at the front of the bucket?)

http://youtu.be/Kbv0GUMWuSU

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Works nice Jim. To answer your question; "DUMP ROPE"

Playing around with the hoist chains drag chains and dump rope lengths, You will be able to dial it in perfectly for the digging conditions.

Re: Ny-Lint Mobile Dragline Conversion
 

Very nice jim-works good and you operate it well also. Looks like you are having a little trouble with the back of the bucket lifting up when loading. You might try lowering the attachment points for the drag ropes on the bucket. Be cautious, a little does a lot. I agree with 9W, just keep tweaking things and you will get it perfect. Another old model survives!!!!

Re: Ny-Lint Mobile Dragline Conversion
 

Tom,

Thanks. I have a few more things to do and will continue to adjust things, but I'm very pleased so far! Much easier working on this one compared to my first one that was the 1:50 die cast.

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Now that it seems to be working pretty good, time to finish up.

Added studs to the end of the drums and supported with channel that will be attached to the inside of the cab on the off side to support the drums/servos.

http://i1291.photobucket.com/albums/...psbb9c87e8.jpg

http://i1291.photobucket.com/albums/...ps58c1298c.jpg

Also turned a bit off the outside diameter of the to large drums and left a small high spot on the inside to reduce the friction on the angle support bracket.

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Looking good jim. A lathe sure is handy!! Have you thought any more about the tracks?

Re: Ny-Lint Mobile Dragline Conversion
 

Put some fancy on one of the pulleys. I can't keep away from the lathe!

Turned a shoulder and a center hub and put holes around the center. Should have moved the holes a bit further out. Having fun and learning all the time.

http://i1291.photobucket.com/albums/...psb5d3abe1.jpg


http://i1291.photobucket.com/albums/...ps7472ae8f.jpg

Anyone have ideas about making a pulley with spokes? I do NOT have a mill. Wonder if there is a way to produce something like that?

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Jim-looks like you are having fun and learning about the lathe. I think a mill is the only way to do spokes. I did it on my mill but it took me a long time-
http://i305.photobucket.com/albums/n...ps1c355c01.png
Maybe one of the machinist on here will comment on this.

Re: Ny-Lint Mobile Dragline Conversion
 

Jim Go to my 9W build thread and look around pages 15-21 or so there are pictures of how I made my spoked sheaves. Here is one but If you look around I have the whole process step by step. I had to make 18 for my boom.
http://img16.imageshack.us/img16/2904/dscn0371nk.jpg

Re: Ny-Lint Mobile Dragline Conversion
 

Steve, those are NICE looking!

Question for you machinists - is the order of my steps correct for making a pulley? I want to make two new pulleys for my boom tip and put holes around the outside of the wheel. I know it makes a difference depending on what is being made and with what equipment.

Here is what I think I'm going to do, but half the time (since I'm still learning) I get to a step and realize that I should have something else first or in different order...

Chuck the raw part in the three jaw
Face
Center drill and ream to 1/8" I want a final I'd of 1/8" for the steel rod in the boom tip
Turn the groove in the pulley
Here is where I'm unsure
Add the relief and center hub to the first side
Part off just oversize on the width
Drill the bolt circle holes around the diamete
Put it back in the three jaw, this is where it get tough because now I'm messing up the outside with the three jaw.
Add the relief and center hub to side two

I probably omitted a step here. Should I be using some type of arbor thru the center hole?
I am drilling my bolt circle holes on the vice on the drill press.

Is there some high school machinist text boom that would help me with this sort of stuff?

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Jim-I certainly am not a machinist but I will offer this. If you are damaging your parts with the chuck you may be over tightening the chuck. You will learn as you go but on small parts using less pressure and making small cuts works for me.

Re: Ny-Lint Mobile Dragline Conversion
 

One trick is to make a collet that can be chucked in the three jaw. Make it out of whatever round stock or pipe you have. Turn a bore just a thou or so bigger than your sheaves with a shoulder inside a little shallower than the width of the rim. Then slit one side with whatever you have that will make a clean cut. The slit will allow the collet to squeeze the sheave when the chuck is tightened. I whipped up a quick pic with my CAD program but it isn't making it easy to post it.

Re: Ny-Lint Mobile Dragline Conversion
 

Jared,

That does make sense. I may have to try that.

Re: Ny-Lint Mobile Dragline Conversion
 

Since you are going to have the center hole in the pulley, why not put a bolt and nut thru it and hold onto it when you turn the second side of the pulley? This works as long as you make sure to really tighten the bolt that you are putting thru the center hole and take light cuts with your tooling.

Re: Ny-Lint Mobile Dragline Conversion
 

now that does look spiffy!! wow!!!

Re: Ny-Lint Mobile Dragline Conversion
 

TC,

I actually have done that on a few parts. I have turned a couple pulleys from bar stock cause I don't have any round big enough, so I cut a square of the bar, drill it and chuck it in the lathe.

Here is a pic of my current mod. Don't want anybody to get the idea I use the lathe on everything now. :D bent some sheet and filing it down to make corner angle for my boom extension.

http://i1291.photobucket.com/albums/...psdc0dc2d4.jpg

Jim

Boom Modifications
 

Got two new pulleys made for the boom tip and a bit more to do to the boom extension.

http://i1291.photobucket.com/albums/...psc40c5628.jpg

http://i1291.photobucket.com/albums/...ps81634c10.jpg

Using sheet stock cut to the lattice shape for the cross bracing.

http://i1291.photobucket.com/albums/...ps6b5c1b01.jpg

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Looking good jim-how long will the boom be when done? Your pulleys look spot on too. Did you lay-out the holes free hand? Also, good idea to make the bracing in sections. I did it one pc. at a time and it sure took a long time. How will you attach the bracing, screws, solder, brazing? Keep posting pictures.

Re: Ny-Lint Mobile Dragline Conversion
 

Tom, thanks. The pulleys are not perfect but good enough for this crane and I'm always learning something new every time I turn something. I did the layout with dividers, so I mark half way around each side and then drill the last hole between the last two marks that never hit in exactly the correct spot. I have my eye on a rotary table!

I'm not exactly sure how long the boom is going to be. I think my extension is about 5" extra. I eyeballed it trying to make it look good when mounted on the crane. I think it will add a bit of use ability to the machine.

Not sure how I will attach the bracing. My initial thought was standard aluminum rivets but my angle is so narrow that even my smallest rivets are not going to work. I might just use some glue of some sort and try to wedge them in so they are tight.

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Jim, heres the thread I started on mine. You can see how long the extension is. if your interested I'll have to measure it for you later.
http://www.rctruckandconstruction.co...ead.php?t=7818

Re: Ny-Lint Mobile Dragline Conversion
 

Kent,

I had forgotten about yours. That extension looks nice and must be at least twice as long as the one I'm building.

Tom, I checked the boom. My extension is 4.5" and the new total is 27" center to center.

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Getting the boom extension finished up. I saw this sheet metal tip on a YouTube channel I think it was mrpete222. He was cutting sheet metal with a hammer and chisel. I saw it and thought it looked pretty crude and completely nuts. But, I got bored and had to try it! I can't believe how GOOD it actually works, so I made a quick video with some pictures and video of the last section of boom extension.

http://youtu.be/CbCeD10j9hg

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Here is the boom extension installed and painted yellow. Didn't have any blue on hand, not sure what to think about the yellow section?

http://i1291.photobucket.com/albums/...psa2954843.jpg

http://i1291.photobucket.com/albums/...ps920229f1.jpg

http://i1291.photobucket.com/albums/...ps28fc2491.jpg

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Looks great !

Re: Ny-Lint Mobile Dragline Conversion
 

Man, this thread is worthless without the photos.:o

Here are a few of them in a video format.

http://youtu.be/h_wDThHiDg4

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Thank you very much for the montage video!

Do you still have any of the other videos on your youtube account?

Re: Ny-Lint Mobile Dragline Conversion
 

Frizz, glad to help out. I think the dragline videos of mine that survived are the new ones of the crawler undercarriage.

Did a bit of work in the shop yesterday, made two pulleys on the lathe and found a fairlead drawing that I'm going to use as an example. We will see how it goes. I'm not sure how I'm going to do it yet? I found an old thread on the die cast forum where 9W milled the one on the 9W from a solid block.:eek:

I was looking at it yesterday thinking maybe making it in two or three parts and bolting it together. I would like to keep the easy conversion from drag to clam if I can.

http://i1291.photobucket.com/albums/...psaxkzc2k1.jpg

Pulleys to check size/scale.

http://i1291.photobucket.com/albums/...psvrxvtwm9.jpg

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Question:

Since this thing sort of floats and is able to pivot, should the final rollers be positioned a bit off center high so that the rope would tend to keep the final rollers vertical? In the drawing it looks like it is on center.

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

My question is the same Jim. But, if you think about it, when the cable dips down or up it goes off center pulling on the wheels rather than the rollers.
Watch some of Bennett Shovels Lima 2400 videos. That machine has the same type as this B-E one. I think the reason for this type is because on these smaller machines the drag cable is whipping around way more than the giant dragline's ropes. Translating into more wear so the load is transferred into both sheaves. The large machines have more space to put larger diameter sheaves on turning slower lasting longer.

Re: Ny-Lint Mobile Dragline Conversion
 

Thanks i only saw it on the truck in a couple videos in a garage with a dirt pile. Killer looking crane.

That's a really slick roller fairlead. I would make a T plate adapter to mount that off the front so 3 fasteners or 2 fasteners and lifting a hook off a lip let you pull it to convert to clam.

I don't think it would need to be offset above or below much since it looks like the larger sheaves are close enough the cable is captive between their edges. How much float do you think it'd take to keep the line smoothly filling the winch drums instead of bunching up?

Re: Ny-Lint Mobile Dragline Conversion
 

Friz,

This thread probably has more stuff related to my crane conversion. It is the crawler undercarriage that I made last fall.

http://www.rctruckandconstruction.co...ad.php?t=10381

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Do you remember any details about the drag bucket, was it made off any plans or just eyeball? I assume its brass or steel?

Jeremy

Re: Ny-Lint Mobile Dragline Conversion
 

Jeremy,

It is all brass from the rack at the local farm store. I can get you some measurements if you want. The bottom is made from a pretty thick piece that was full width (1.5" I think) and I basically found a patent drawing of a bucket that I printed to a size that looked about right for the scale of the machine.

Let me see if I can find the link that I used. One of the photos in the build has the print under the bucket in one shot.

The video at 1:50 shows the drawing I used. I basically used the drawing to match the curve of the bottom piece. Still looking for the link, stand by...

Okay, let's see if this link works...

http://patentimages.storage.googleap...1/imgf0004.png

And this should be the full document...

http://www.google.com/patents/EP0321542B1?cl=en

And mine measures .070" center base plate 2" wide at the mouth and I tapered it a bit toward the rear to make it load a bit better. The sides are about 1" tall and I made them from thinner .035" but they could have also been .070" to add weight to the bucket. I thought about adding wear bars to the under side of the bottom and maybe sides to give it more mass.



Jim

Drive Tumbler Questions
 

Guys,

I'm trying to improve the crawler on my crane. I decided to try the "Z" style drive tumbler. My question, do the lower idlers help keep the tracks centered?

Here is a pic of what I'm trying to do. Not sure what it is on? Old something?

http://i1291.photobucket.com/albums/...ps7h79jhtz.jpg

Anyone have any drawings of the idlers for something like this? Why are some like this and other like center wheel and knobs on the driver?

Thanks, Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Here is my prototype Z tumbler. Now I'm trying to figure out what to use for the new drive "stubs" or dogs or whatever they are called? The little nub on the track links. I need something a bit wider than the current version.

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

Jim

Re: Ny-Lint Mobile Dragline Conversion
 

Hi jim-good to see you working on the dragline again. I have this one old picture that may help.-
http://i305.photobucket.com/albums/n...psjrcfpqlo.jpg
I think most of the old machines drove from the lug in the center of the track pad. You can see in this picture one lug is inside and one lug is outside of the tumbler.

Re: Ny-Lint Mobile Dragline Conversion
 

Tom, thanks for the picture. Do you know what brand or age the machine is? I'm curious about when or why they decide to use various style lugs and drive tumblers.

Jim

Re: Drive Tumbler Questions
 

Yep. And I think the bottom rollers should be spaced different than the spacing of the lugs so the track can't slip around them. That way at least one or two rollers and lugs will always be engaged.

My guess is patents. Someone patents one style so the next guy has to figure out his own way. And always there's the quest for a better mousetrap.

Re: Ny-Lint Mobile Dragline Conversion
 

Jim-sorry but no I do not know the year or model. Here is another picture. It doesn't help but just shows it is a small machine.-
http://i305.photobucket.com/albums/n...psnaayruv6.jpg
It could be a Koehring, not sure. There is a guy on here named "bartles" that is building a model of a Koehring 305 dragline. He sent me these pictures. Look on page-8-for his thread but he hasn't been on here for a long time.

Re: Ny-Lint Mobile Dragline Conversion
 

Progress on the crawler update. I machined a few new drive dogs for track pads and made a new main and center idler wheel. I need at least four more small idlers then I can test the new design.

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

Jim