Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Looks strong and heavy. I see more counter weight in your future.:)

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

I want to darken the brass with black patina hopefully Tom. That's going to take alot of elbow grease to clean everything so it'll take. I could glass bead it but it's too big for my cabinet. I'll have to waste the media into the air I guess. Another media I never tried is baking soda. I don't think it's all the destructive.

Yea, Scott, It is a little heavier we'll have to see how much weight to add. I have lots of room in the floor boards for lead shot.

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Steve. The workmanship on your boom is spectacular. You are a very patient man with all the details your building into it. I've used both soda and dry ice for cleaning up parts. I personally like the dry ice best, because there's no clean up after. They both work very well for detailed parts because their meant for that type of work.
Rob

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

How does the dry ice method work? Spray a CO2 fire extinguisher at it? I never heard of that other than stripping paint off of airplanes.

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Here's a link to some new small one's.
http://www.coldjet.com/en/products/d...FQsGbAodnBc1bA
The one we used the ice came in 4ft square tote and was dumped into a hopper on the machine. I see this small one will use blocks and it even shaves the ice for use. It did a great job of cleaning up the old car body and leaves no rust behind. Two years ago we used a truck mounted one to take the painted runway numbers up at the airbase here. we had a limited time to do it and it worked well. No damage to the concrete.
Rob

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Interesting, Pretty expensive I imagine, can one be rented?

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Yes That's what we did and to be honest with you I can't remember the cost, although it was reasonable compared to sand. Sand on old car bodies can be very aggressive depending on the grit. I would guess in your area a look in the yellow pages might work under cleaning and blasting. Someone may have a setup and you could take the boom to them.

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Steve , look into walnut shells . I heard of that being used also

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

I thought of walnut too. I used corn cob media to blast my Caterpillar Sixty engine because I didn't want to tear it apart.

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Wow Steve

This is gone be one of the most detailed and beautiful booms i have seen.
I see you are searching for blasting methods i think you will be a extremely happy when that is done.

When the whole boom is done and blasted you need to sit down around it with a few good friends and simply look at it and enjoy it for hours and a have few beer. :):)

Eef

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

I'll be enjoying a few cold ones while digging soon. All I need is the boom lighting for the second shift:D

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

LOL :D and a truck to load :p

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

A truck load of beer ?? :):)

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Your metal workis off the chart!!! Fantastic job on the boom. I wish i had the "metal" skills you guys. I'm still learning how to chuck-up my lathe :D

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

My brain is recharging for the next step I have to take and that's to remove the ''A'' frame and drill a few hundred more holes for the diagonal bracing and mainly I need to get the suspension rope sheaves mounted up there.

Just watch you don't chuck up your lathe too much. Maybe you need a bigger chucker.:eek::D

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Got alittle done this weekend on the boom suspension ropes. Not much because I'm getting parts ready to go to the sand blaster for my antique road grader restoration.

I had to drill the "A" frame sheave shafts at a 3deg angle so they will track inline with the boom taper to the point.
http://img710.imageshack.us/img710/1707/dscn0361e.jpg

The shafts for the point sheaves
http://img219.imageshack.us/img219/2817/dscn0360l.jpg

I didn't have any 3/8'' hex stock handy,so I milled some round stock to suit.
http://img534.imageshack.us/img534/2681/dscn0359q.jpg

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Steve-very nice as always! How did you drill accurately thru both pcs. of metal with the A-frame mounted at an angle. Or is this secret stuff?:D

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Spot drill both layers

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Well PUGS is partly correct. Originally I drilled the big plates stacked together with a 1/4'' hole. But when I did that I forgot about the 3deg angle. When I fabricated the channels I didn't drill them. When I set this up,I located the outer hole with my Co-ax indicator then I plunged a 1/4'' endmill down to spot face the next layer (channel) and that made the plate hole oblong. Next I went in with a 7/32'' screw machine drill because I don't have a long center drill handy and drilled through the second and got a longer drill bit for the third. Next came a 15/64'' drill then the 1/4'' reamer. Finally I drilled everything out with a 9/32'' drill. I would have bored to the finish size of 9/32'' if I had a longer boring tool that would fit in a 1/4'' hole. I need to make some bushings that fit the hole and will have the a 1/4'' bore for the shaft yet to come.
All the diagonal bracing in the "A" frame is going to be real fun to figure out. Currently I'm going over my designs from 3yrs ago making sure where to place all the holes for them.
I'm also looking into the wire rope needed. I need a total of 240' of 7x19 3/64'' for the boom. One of the 4 pieces is 167' and that's a small problem. I found I guy on ebay with 100' coils,none longer cheap. I'm going to have to bite the bullet and order from McMaster Carr now and it'll be around $215 instead of the $30 :mad: I checked at a local cable and sling co. near me and they couldn't get any either. They did have coated galvanized they use in race car parachutes I could have for next to nothing but too stiff and the OD slightly larger and won't fit in my sheaves.

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

nice work on the point sounds like your having cable problems like me i can't find anything that isn't stiff like the 7 twist galvanized in 1/16th and thats kinda what i need just not so stiff..........keep up the awsome work

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Use the .038'' 7x19 . 1/16 sounds out of scale for the Terex. It probably had 1/2 or 5/8'' originally. I have some and it's very flexible. Check McMaster Carr $1.69/ft.:eek:

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Be sure and call Mcmaster and make sure its a continous roll you're buying. Seems like everytime I buy stuff from them its from a diff company and slightly diff stuff.

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

You know I was thinking that too. If I could buy from a manufacturer I could be assured. The sling outfit tried 3 places for me and resulted the dreaded minimum qty. well I'd buy more if the price per foot would be lower.

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

lol i would but i don't really know the size yea the real cable is 5/8 i need to look at some in person i guess is what i am tryin to say lol

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Hi Steve

Did you try sailing boat shops , i was lucky there.
They use all sort of sizes , and small ones too for on those small 1 person sail boats.
Over here they even sell 1 mm ( i think thats something like 5/128 ) stainless steel.
And from there the sizes go up.
And it's very flexible as well because it has many small wires.
Give google a try for your area
here is an example http://www.westmarine.com/webapp/wcs...classNum=10244

Eef

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Pugs just sent me this outfit.http://www.savacable.com/pages/prod_01_00.html
I'm waiting for a call back. I see a 3/64'' 7x49;) That would be really flexible.

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Yeah and they have a 250' min on stock sizes and a $150. min order, which is less than the mcmaster. Plus they have fittings and thimbles too.

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Steve-thanks for the explanation. I guess there is a way to do anything if you have the correct tools. I sometimes forget how big your model is and that makes a difference. On my little truck a 4-40 screw hole is a big hole.:)

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

if you will check with your local beading store they have what you need
it will come in 7 ,21 or 28,49 strand beading wire was called foxtail a long time ago
or check fire mountain gems on the net one roll is 60 yards and around $20
they have it in colours and stainless and silver or gold if you have the money
even have it in nylon

or rio grande or any jewelry supply store

if you need i will post web address's tomorrow for it

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Thanks Grumpygrady, I googled it and found it. Looks like it only comes coated and max dia. of .024'' That would be too small for my application. There's a Michael's craft store about 3/4mile away from me. I'll get some anyway if they have it, and see what it looks like.

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Well, It looks like buying from McMaster Carr is cheaper than buying from their supplier (Sava Cable). I was quoted $150min order(no problem with my required footage) $1.08/ft for 250ft of 7x19 and $2.59/ft for some really flexible 7x49. That stuff would be real nice on smaller models.
McMaster is around $.87/ft for the 7x19

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Wow, was worth a try anyway.

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Will the 7x19 (is that 7parts with 19 treads in each, or 7mm with 19 treads) have shorter life lenght than 7x49??
Guess it depends on minimum radie that the cable can be run with,
Dan

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

This link has an end view that explains this.

http://www1.mscdirect.com/eCommerce/...rchandizedOk=Y

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Here's another source to try for the cable. They have a variety of sizes and configurations - 3/64" 7X19 is just one of the choices. The catalog I have is about 3 years old, so you'd have to check for current prices.
Precision Scale Model Engineering, [URL="http://www.psmescale.com"][EMAIL="psme@psmescale.com"], phone 508-478-3148.

Ken

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Thanks Ken for the link. I didn't see any products though. Do you have to order their catalog to see what they offer?

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Steve. I don't know if anyone mentioned this, but you can get very small cable from any of the overhead garage door people. I got some from a guy here and it was 1/8" dia SS and very flexible.
Rob

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

There's also the cable here, it's .017 SS Dia.
http://store.rc4wd.com/Bulldog-Repla...ne_p_1168.html
It may be available in longer lengths.
Rob

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

I think the only way to see the product is in the manual; however, I've called and emailed questions and always had good response. Perhaps if you contacted them, they could furnish pictures or info. The book does not really have a picture of the cable - a size and type chart and explanation diagrams to show what a 7X19 designation means, for example. It is not a hi-tech book, mostly B&W images of products, but a section of color/slick info on small power tools, machining equipment, etc.

They do have supplies, material and tools I've not seen elsewhere.

Hope that helps a bit.

Ken

Re: 1/16 Bucyrus-Monighan Walking Dragline
 

Well after the big computer crash last week I'm back running but big problems with my Cad Cam program working with Windows 7. Luckily I still have all my files and thousands of pictures from the old hard drive still there. I have it fixed partially and will be looking for another old computer with XP or Vista. to run just the BobCad stuff. I also found out my old Autocad 2000LT won't work either. Now I have to buy a new version for 2012:mad:
I would have had some more done on the A frame if I wasn't occupied with these computers.
Today I ordered 100' of 3/64'' cable off ebay but not enough for all the suspension ropes to try on the boom. I want to try to get it ready by May 8th for the Lakeside Sand and Gravel show and then May 20-22 Brownsville,PA.