Re: Bucyrus Erie crane truck
 

Killer job! Looking foward to more updates, glad you're trucking right along with this one.

Re: Bucyrus Erie crane truck
 

The house looked pretty good. have you considered using AL?

Kerst

Re: Bucyrus Erie crane truck
 

Thanks. It will be a fun one to operate once it's done :)

Thank you. And yes my original plan was to mill down a block of aluminium, but I no longer have access to a milling machine. I would however be able to use aluminium flat bar and plate. BUT I would have use epoxy as I do not have access to a tig welder.

Edit: or maybe brazing :confused:

Shawn

Re: Bucyrus Erie crane truck
 

This project has been the back burner sense my last post. Again :rolleyes:
But a couple of days ago I finally pulled it off the shelf and did some detail work mostly on the crane carrier but. I did add sliding doors and rivets to the back of the crane as well.

https://i.imgur.com/NQsSaU3l.png

https://i.imgur.com/CrYYxl9l.png


As for the carrier, I added a battery box and the fuel tank. And some trim to the cab as well as a opening door.


https://i.imgur.com/mvNNUcql.png

https://i.imgur.com/BLITJeyl.png

https://i.imgur.com/32jxI1Ll.jpg

https://i.imgur.com/wZHr7k8l.jpg

https://i.imgur.com/y1zl3swl.png

https://i.imgur.com/RYFwGqvl.png

https://i.imgur.com/VWiYILDl.png




I'm still having trouble deciding the best way to approach the mechanical parts of this project, and to make things harder my little craftsman lathe is still not running do to a missing drive pulley which for the life of me I cannot find for sale anywhere :(




Shawn

Re: Bucyrus Erie crane truck
 

This is a really kewl build! I can't wait to see vids of it working.

Re: Bucyrus Erie crane truck
 

Your coming along faster then my parts . I’m still trying to find sizes for the crane body . Looks great

Re: Bucyrus Erie crane truck
 

Sweet, I really like these purpose built cabs like the COE & CBE. Much more appealing than a kit body.

Hope that pulley finds it's way to you. It really grinds a project to a halt when you cannot use that special tool. :mad:

Re: Bucyrus Erie crane truck
 

Thank you. I will be sure to take plenty of videos when I get it operating.

What type are you planning to model, 22B? if so 9W Monighan shared some scans from a 22B manual here.
http://www.rctruckandconstruction.com/showpost.php?p=47280&postcount=14

They helped me get the scale on my crane housing pretty close.

And if you need reference photos, I have a small collection of photos I have saved from the web on my computer. Also if you use Sketchup I would be more then happy to share my design file.



Funny story. I actually got on ebay shortly after posting the update, and was
shocked to find that the exact pulley I have been trying to find for almost a year just got listed on ebay, let's just say that was the fastest ebay purchase I have ever made! :lol:




Shawn

Re: Bucyrus Erie crane truck
 

Impressive styrene-work.

Re: Bucyrus Erie crane truck
 

Thanks for the info Shawn . Went and quickly looked at the site . And I don’t have sketchup . I will plod along . Mike

Re: Bucyrus Erie crane truck
 

Hi Shawn what are planning on using for a swivel on the crane house

Re: Bucyrus Erie crane truck
 

The plan is to get the swing mechanism as close to the real machine as I can. So I'm going to machine a custom swing ring and cut internal gear teeth in to it just like the deal.

Here is a diagram of what I have been able design based on what information I have.

https://i.imgur.com/4ApiRxNl.png


The ring will be mounted to a base by bolt holes tapped in the ring, the base will have the bearings for a central shaft that will be mounted to the crane frame. The frame will have rollers that go inside the race in the ring, like this.

https://i.imgur.com/RMXbQPal.jpg





Shawn

Re: Bucyrus Erie crane truck
 

This is interesting the ring mounts to the truck then the wheels are mounted to the crane and support the weight of the crane ? Is there a center pivot ?

Re: Bucyrus Erie crane truck
 

Yes, there is central shaft that runs through the crane base to the ring base

https://i.imgur.com/fmLAxG8l.jpg




Shawn

Re: Bucyrus Erie crane truck
 

Cool! I'm planning to do the same thing on my 25B when I get back to it. I have a shaper I plan to use to cut the gear teeth- after I get it running, that is. How will you cut the teeth?

I don't think the center shaft does anything to keep the house centered on the swing circle; the hook rollers do that. As far as I know, it is just a way to transmit power down to the tracks. I wouldn't get too worried about building that part into your machine. Before hook rollers came along, cranes had upper and lower rollers to support the weight of the house and the center shaft did double duty as power transmission and keeping the house from falling off the circle and my understanding is it was nothing but trouble.

Re: Bucyrus Erie crane truck
 

So much to learn and figure out !

Re: Bucyrus Erie crane truck
 

How are you planning to cut the swing gear, by broaching it?Ed

Re: Bucyrus Erie crane truck
 

Yes the plan is to use broaching to cut the swing gear. I only have a lathe so I'm going to use a profile tool in a boring bar holder and just slowly scrape away until I get to the right tooth depth and since I'm using aluminum for the swing ring I should not have too much trouble. As for indexing. My lathe has a gear reduction that can lock the spindle, so I can just enable the gear reduction cut a tooth and then disable it go to the next tooth on the gear reduction or skip a couple to divide, that way i can use my lathe as a poor man's indexing head :p


The only reason I was planing to add a center shaft was for rigidity. As I do not know how tight I'm going to be able get the hook rollers. I will just have to see how it works when I machine the parts and do some tests.




Shawn

Re: Bucyrus Erie crane truck
 

Love this build! Just a clarification about the center shaft and hook rollers. Center shaft does transmit propell power to lower works, but the house is also centered by the bushing around the shaft housing. Hook rollers control the tilting of the house on the ring, so clearance is needed between rollers and ring path. Roller clearance allows front rollers to contact on bottom flange and rear rollers on top flange, when lifting. If they are adjusted in too far, lack of clearance will prevent rollers from turning during house rotation.

Re: Bucyrus Erie crane truck
 

That makes sense. Thanks for clarifying that.

Re: Bucyrus Erie crane truck
 

So the rollers need enough clearance to roll but not to tight not to loose . Hmmmm

Re: Bucyrus Erie crane truck
 

Yes. When we adjusted hook rollers, we'd lay the boom straight out (sometimes with weight on it) to tilt house forward, then measure clearance at top of front rollers and at bottom of rear rollers. Since rollers are tapered, adding or removing shaft shims would push them toward or let them pull away from the center shaft, altering the clearance between roller and circle flange.

Ken

Re: Bucyrus Erie crane truck
 

Ok now just have to build that in 1/14 scale . Thanks Ken

Re: Bucyrus Erie crane truck
 

Nice work! I like seeing these scratch built projects come to life.

Re: Bucyrus Erie crane truck
 

Thank you.




I had some free time over the weekend and I was able to the roof hatch on the crane housing done.

https://i.imgur.com/lwj2Svqh.jpg

https://i.imgur.com/DIwMRTUh.jpg


On a side note. I got the lathe running and bought a quick change tool post, so now all I need to get is some tooling and a drill chuck and center, and I will be able to start machining the swing ring.





Shawn.

Re: Bucyrus Erie crane truck
 

I wish I had skills enough to do scratch built styrene work like that!

Re: Bucyrus Erie crane truck
 

Looks great . I made my floor and stabilizers

Re: Bucyrus Erie crane truck
 

And my pic didn’t come in sorry (frustrated )

Re: Bucyrus Erie crane truck
 

Have you tried using a image hosting site?



Shawn

Re: Bucyrus Erie crane truck
 

Oops! My bad. I guess I've been away from it too long. Looking at my drawings I see I made provision for a center bearing. :o

Re: Bucyrus Erie crane truck
 

You have a drawing for this piece ? Would you share it ? Mike

Re: Bucyrus Erie crane truck
 

I've posted this in the past. Is this of any help? I have more if needed.

http://imagizer.imageshack.com/v2/10.../dscn1274k.jpg

http://imagizer.imageshack.com/v2/10...90/37/22b6.jpg

http://imagizer.imageshack.com/v2/10...0/11/22b21.jpg

http://imagizer.imageshack.com/v2/10...90/85/22b5.jpg

Re: Bucyrus Erie crane truck
 

Yes I have seen these , but I’m looking for more dimensions. And I thought Jared had a personal drawing of the turntable . Reading these engineer drawing is not for the faint of heart . Thanks Mike

Re: Bucyrus Erie crane truck
 

Usually I enlarge or reduce these drawings to fit my use. The design is pretty much the same throughout the line of these machines.
I may be able to dig a little deeper in my books and find more on those rollers.

Re: Bucyrus Erie crane truck
 

Thanks for posting those drawings, i think i can find some use in them for my Michigan dragline.

Re: Bucyrus Erie crane truck
 

I took this drawing and used the measurements at the top and did some quick scaling to get the dimension for the swing ring. It should be accurate if the drawing is to scale, all you have to do is use a scale calculator to get the dimension for your model. I'm modeling to 1/14 scale, so 55 3/8" in 1/14 scale is 3.96" ;)

https://i.imgur.com/ElByFp6h.png


I hope this helps you.





Shawn

Re: Bucyrus Erie crane truck
 

Thanks for this it does help . I was using my guesstimated size of 4 inches , so that was close to 3.96.

Re: Bucyrus Erie crane truck
 

A small bit of progress on the crane. I made this service hatch, I don't know what it's supposed access on the real machine but it should come in handy to access the winch motors or a battery.


https://i.imgur.com/npnIRz7h.jpg

https://i.imgur.com/vilSiLsh.jpg





Shawn

Re: Bucyrus Erie crane truck
 

Nice

Re: Bucyrus Erie crane truck
 

What color have you picked , and do you plan on making it look like new or an old tired machine like in that picture ?