1/16 Bucyrus-Monighan Walking Dragline

[9W Monighan]

Originally Posted by D8R

Those parts are like arts, guess that with a CNC machine , you still have to put in hour of design of the part in CAD program. Best is that it can be reproduced from files if needed. Have not had any chance yet to test CNC milling but do a lot with laser cut with very good results from CAD drawings.
Hours, weeks or years, who counts but I couldn´t resist to ask, that´s no 1 question when showing the models, my model was started also 8 years ago but there has been some time without anything happening.
Dan

I don't save my CAM files too often because I machine things most of the time "one off" and to do fancy setups with all the tool changing would take too long. I do save the drawing files and if I need to make a second one in the future I just click the lines I want to machine and then generate a CAM file. Most of the time I just use the mill manually.

[9W Monighan]

Now for the fairlead sheaves..








I used the same fixture for all three different size sheaves


Almost finished


Hollowed out are for side sheave clearance.








[IMG]htthttp://img509.imageshack.us/img509/69/9wmodel038jo7.jpgp://[/IMG]

Boring the wheel for bearing






Almost ready to cut loose.


Drilling the mounting holes for the guards that protect the wheels from the crows foot
jamming back into them. I still need to figure out how to machine them.

[mog]

nice art work that must have bean a very costly hunk of cast or was it a left over from a real job.

[9W Monighan]

Originally Posted by mog

nice art work that must have bean a very costly hunk of cast or was it a left over from a real job.

That's 1018 cold finish steel. I had that laying around and it looked like it would work. My only regret was,I should have squared the piece up some because when you get to that size it maybe out some.

[Snochaser]

Amazing work! Boy I'd love to "play" with a mill.

The one use are using is it CNC?

[pugs]

Nice work.

I'd love to play with a cnc mill too.......I own one, just never seem to have time to play on it.

[modelman]

Nice work as always steve-What is the "crows foot" you mentioned in the last picture?

[9W Monighan]

Originally Posted by modelman

Nice work as always steve-What is the "crows foot" you mentioned in the last picture?

Crows foot is just some slang for the socket that the drag rope,dump rope and chains come together.

[9W Monighan]

I finally have a little to add. I decided to order the required tubing needed for my boom. Here's some of the 120' of 1/4''&3/16'' round tubing I'm using for the boom lattice work. I'm still waiting for the 5/32'' that's coming from another location. All in all, another $200 into the dragline.

[pugs]

Should look really good with a proper boom on it. Can't wait to see how it turns out.

[Stuff]

going to be well invested!

[9W Monighan]

Here's a drawing of the boom but some small changes and details still need to be ironed out.

[tc1cat]

I agree. Money very well spent!

[Snochaser]

Oh yeah, that's gonna look real nice.

[9W Monighan]

I've been trying to get my brain started and try to remember where I was on this part. The Boom hoist. I trying to get the right motor with enough power and output. Right now it's way too slow. If my calculations are correct it would have taken 55 minutes to boom up That's just not going to work.
Sorry for the BIG pictures

[modelman]

Very nice work steve! I remember this from the garden site but I don't think it was finished. Did you cut these gears?

[9W Monighan]

Originally Posted by modelman

Very nice work steve! I remember this from the garden site but I don't think it was finished. Did you cut these gears?

I bought all the gears but the two smaller pinions are cut from 12'' pcs of gear stock so I can make them the way I want. I think I've mentioned in the past but I think there's around $100+ buying the worm & the other gears. I even put a tiny thrust bearing on the end of the worm. Right now I'm working on the mount for the motor I'm going to try. After testing it and getting a RPM of the winch drum, I running about 30ipm and that should take only 6-7 minutes to boom up or down.

Stuff:
The pictures were resized too big by accident.

[9W Monighan]

I got some more done with the boom hoist and some on the base of the boom where it attaches to the revolving frame.
Motor pinion


Boom hoist worm gear and a graphic of it on the monitor on my mill.




Cutting mounting plates

[Stuff]

pictures big or small are better then no pictures!!

[modelman]

Very nice steve! I don't understand the monitor thing or the brass plates, but I like the work it's doing! Be interesting to see the finished parts.