1/16 Bucyrus-Monighan Walking Dragline

[tc1cat]

Was watching this build on the Garden and have been constantly amazed by what you have made. Being a machinist by trade, lets me know how much time you have invested in this build. Hopefully, I will see this outstanding machine built and painted digging in some dirt in the near future.

[9W Monighan]

Since I don't have anything new to add I'll be posting some old build photos for everybody's entertainment. Here's a shot of the tub removed from the rotating frame showing the rotary slip ring that transfers the power up to the machinery deck. Notice the 135# marking. That was the weight of the rotating frame less walking cams.
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Here's another old picture of the revolving frame....
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This one should have been in the earlier post on the swing gear box that shows me fitting the box for proper gear alignment on the deck.
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[modelman]

Nice work steve-in pics 1 & 2 I see holes tapped on the main rails between the swing gear and the slip ring. Just curious, what are these holes for?

[9W Monighan]

Ah, that was a huge mistake! I originally was going to make collector rings like the real machine only 14 circuits. I bought a $45 piece of Static dissipating UHMW plastic to machine out then press copper rings in each. After I spent a whole day machining them I was reading that the material was a good insulator only to find that was a typo in the McMaster Carr book. Static Dissipating CONDUCTS electricity! The salesman said I could send the mtl back but I told him I already cut it up. So I scrapped the idea and started buying rotary slip rings that came up on Ebay and I bought several to try. Now I know how much current the machine uses I may be able to put a slip ring in with more conductors. I have one the same size and make but 24 wires. With this type I could hard wire the whole machine and forget about using a radio to control it.

[mog]

looks good mabey i can get you some pic of a P&H 9020 it's going down hear on tusday and they are going to be lifting the tub off the center pin BIG JOB hope to get out of the shop and see how they lift it. i saw some mammoet trucks in town not shere if they will be doing the lift.

[modelman]

Thanks steve-I really like that slip ring you used. The one I used in my shovel had such small wires I really struggled with it. Also I needed more wires.

[dirtpusher9]

Hey Steve, you being a fine machinist, it sure would be cool if you could build the hydraulic pumps we use in this hobby. The kind off work you produce it would be an easy build. And it would keep the money in the good ol USA.

[9W Monighan]

I would have to see one. I could add this to my long list of things people want me to make along with my own projects

[9W Monighan]

Here's some pictures of the load drive and hoist drum parts....
Hogging out a pice of 2x4 steel.


Profile


Walking jaw clutch


One of the bronze two piece bushings on load shaft


milling out the bearing support for the walking pinion


Boring a bearing cap


Ditto


Some parts of the main machinery frame side


Mock up of load drum


Mounting hole for walking shaft bearing block


Just fit on the table


boring hoist motor mount


Cutting Hoist laggin


Hoist assembly parts


assembled hoist

[pugs]

Very nice work

[sparkycuda]

This model is just amazing... The hoist drum/shaft assy looks just like the ones that have come through our repairs shops over the years. Showed the picture to one of our service techs and he was hard-pressed to believe it was a 1/16 model! Just a marvel of machine work.

Ken

[tracksntreadslou]

Originally Posted by sparkycuda

This model is just amazing... The hoist drum/shaft assy looks just like the ones that have come through our repairs shops over the years. Showed the picture to one of our service techs and he was hard-pressed to believe it was a 1/16 model! Just a marvel of machine work.

Ken

I agee Great work steve..If you need some phots of a Jung Pump torn down let me know ...These pumps are rated for a 120 bar ...think thats whats running Ed machine

Hey Steve I have access to all kinds of coal about 30 minutes away ..Say the word and i will get a couple pickup loads and bury a layer in my back yard .LOL ..would give you a couple years work..after you strip then we can haul it over to "Steamer" robs and he can run it in his locomotives

[9W Monighan]

Originally Posted by tracksntreadslou

I agee Great work steve..If you need some phots of a Jung Pump torn down let me know ...These pumps are rated for a 120 bar ...think thats whats running Ed machine

Hey Steve I have access to all kinds of coal about 30 minutes away ..Say the word and i will get a couple pickup loads and bury a layer in my back yard .LOL ..would give you a couple years work..after you strip then we can haul it over to "Steamer" robs and he can run it in his locomotives

I don't need to look very far, about 25'below my house the Pittsburgh seam is there that's about 9' thick

[tracksntreadslou]

Lol...Maybe about 200 years of work for the 9W

[SmallHaul]

Steve, thanks for taking the time to re-post these pictures! More, more...

It still amazes me to look at all of the work you have done.

[dirtpusher9]

Wish you could work on this thing all the time, I'm ready to see it finished. It's going to be sweet.

[9W Monighan]

Here are some photos of the walking machinery. I can't seen to find more. I wonder if that roll of film is still in my old camera that quit before I used digital.

Mock up of the upper and lower pices


Rough Milling the kidney shape on the matching half's




Final finish and rounding over the track


Profiling the T shaped pieces that that cam pushes against





More milling and drilling



Cam Milling




Matching the square drive on walking shaft for a perfect press fit

Milling the mount on the shoe


Milling the taper and bull nose on the bottom of walking unit


2 almost completed walking units

[Thorsteenster]

Good God you've got a lot of time invested in this, and it shows. Awesome work on the machining.
I've never heard of such a machine until I saw you on Scale4x4 and had to a search to see what it was.
I can't wait to see a vid of yours in action.

[9W Monighan]

Here's the link to my videos. There are some crude videos there of it's progression so far.
http://www.youtube.com/user/Scentlessapprentice9

[D8R]

What CAD program do you use?
I was lucky to get digital readout on my milling machine but how funny to have a CNC.
Guess that out of budget for modelling purpose only.

Very impressing model, do you count hours put into it?