Re: Great Dane excavating co.
 

Cooper you can buy telescoping tubing I got some at Cabin Fever. It can be had in steel or stainless. Hobby Metal Kits is the place and it is thin wall. www.hobbymetalkits.com 608-345-2617 Bernie is great to deal with. I got steel in 1/16 graduations for 6 stages. Happy building. Ed

Re: Great Dane excavating co.
 

304 stainless

http://i830.photobucket.com/albums/z...pscnrzpjwn.jpg


http://i830.photobucket.com/albums/z...ps73gvx2za.jpg

Re: Great Dane excavating co.
 

Thanks, that's what I need to get and make a prototype in stainless.

Some work/play today

http://youtu.be/AH3yVILDwtw

http://i1357.photobucket.com/albums/...psgocihf1o.jpg
http://i1357.photobucket.com/albums/...psvk4whzbp.jpg
http://i1357.photobucket.com/albums/...psaivpqhpu.jpg
http://i1357.photobucket.com/albums/...psxbsewgxo.jpg
http://i1357.photobucket.com/albums/...psu0scmazd.jpg

This was a project my dad wanted me to get done for him while he is in sunny Florida. It is the sump drain from house basement. Last year critters and leaves clogged end up and froze solid 3-4' length. So I replace the last 15' and put a cleanout in it. Wasn't really necessary but I didn't have and couplings for dwv pipe only tees and an end cap. But now if something cloges end I can push it out. And also had something to dig up and push dirt around :). Contract job, I will have to bill him. But he only pays in 1:14 scale!!!!

Re: Great Dane excavating co.
 

Cooper

Used to work in a machine shop building 3 stage dump cylinders, what we built had the oil enter the bottom of the cylinder. The bottom looked just like yours except it had a port, no port at top. we then welded a heavier flange on the bottom of the second and third stage in which we machined the seal groove. For the top of first stage we did same as you, we did internal thread for the other 2, know you can't do this so just repeat what you did on #1 stage, no seals just make sure that the inside of caps are smooth. Double O rings on bottom are fine gives a better seal. My model 300 ton has this type of cylinder works great, and 1/16" size difference is fine even for tops work fine as seals are inside of piston, and no seal at top allows air to flow out through heads.

Earl

Re: Great Dane excavating co.
 

Thanks for the info earl. These cylinders are what I would call inverted, the smaller stage is on bottom and larger casing cylinder is the top. It's how the cylinders are mounted on cat haul trucks. That's why I had the oil entering from smaller stage as it will be the bottom. I guess this way dirt and debris are kept to a minimum on the rods.

Re: Great Dane excavating co.
 

there are a few rock tubs with the piston upside down

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http://youtu.be/IZPJOa2tmrc

Think this guy got fired?

Re: Great Dane excavating co.
 

super mario testing out the repair job

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Wasn't there some sort of training video where they were driving crazy as well? That one just looks like someone got laid off and said "oh yeah"?

Re: Great Dane excavating co.
 

Yup. That would be your typical traction control test. Much more fun when doing on purpose compared to when the truck decides when it wants to do it. :eek::jaw::lol:

Re: Great Dane excavating co.
 

I'm worse than a girl in a dress shop!! Can't figure out what to build yet. 797 is too big, Brian got the 793 down and I'm now thinking 795b. It's a simpler design to build, more square front end. Tires, problem. 777 are 7.35". 785b are 8.35" and 797 are 12.9" scale. (Just a quick internet look up and I may be wrong. 1:14 scale). I found some hand truck tires 8" that are not correct but I'll just say I got retreads!!! Now the height of bed for loading on the 797 is like 19". The 785b is 14". That would be ok for me to load with the cat I got. I think, a test apparatus I set up. The black line is 14".
http://i1357.photobucket.com/albums/...pscmpvstfu.jpg
And that is with stick level
http://i1357.photobucket.com/albums/...psafoz0wfz.jpg
That is with boom and stick completely extended. So I think at 14" I'll be ok loading on even ground. Want to make as big of one as I can and still be able to load it.

Re: Great Dane excavating co.
 

how about a international pay hauler 350
50 ton machine and its different
http://www.silverstatespecialties.co...ler350C_01.jpg

Re: Great Dane excavating co.
 

That would be nice!! Never knew they made that.

Just got off the phone with Brian and I don't know why I didn't think of it before but the master of 3d printing gave me the idea of printing a mould for whatever size tires I want. So I think I may try that. Another thing to "learn",,,, casting stuff. Just another reinforcing for our hobby, if you can't find it make it!!! Now all I have to do is move computer out to garage, start a argument with wife, get banished to garage and in a couple months possibly have a new baby addition to the construction company :)

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http://i1357.photobucket.com/albums/...psacvlu60d.jpg

Ok I had a little time , about an hour to make this. If I knew what I was doing it would have been about 10 min!!! Not sure about how to make a negative mould. It may be better for me to make a scale tire, trim sand the plastic tire and then make the mould from that. It's just a start to see if I can do it. The treds will be more accurate on final but it's a start.

Re: Great Dane excavating co.
 

What software is this?

Re: Great Dane excavating co.
 

Make your master in the printer . Clean it up smooth it if necessary . Then make a mold and cast them like Tom did . I made the negative of the tire for machining the mold , but I forget what I did :o . I have 2004 autocad

Re: Great Dane excavating co.
 

The free stuff, autodesk123 design. I'm not too knowledgable with this stuff but from what I've found it works to an extent. From what I researched most are making a extrusion for treads on a different layer but with this I can't do that so I used the circular pattern and just increased the number till treds looked full.

Re: Great Dane excavating co.
 

That's what I think I'm going to do, make a master that I will be able to clean up the lines from printer. Then make a negative. Still researching what silicone to use. Rtv with pigment for final. Not sure what hardness, looks like around 60? Still not too knowledgable on that part. Like I said another thing to learn how to do!! So far in this hobby I'm a machinist, designer, frabricator, metalergist , ect,,,, and still don't know any of that stuff!! Would make a heck of a resume, until I got hired and didn't know squat!!! :) what hardness are those tires on your loader? A little soft if I remember but they are holding up great. (Kind of felt like some surgical implants :). ) lol.
Once I figure out what I'm doing I'll get more precise with tread pattern. I'm sure a few "oops" will be along the way. But if they turn out I might be able to make a few for others? Do you know what products were used in the making of the actual tire? Rtv silicone? Pigment?

Re: Great Dane excavating co.
 

look for modelman's (Tom) 777 thread , he goes over the whole tire making . Or he'll see this and help you out ;) .

I know my loader tires are made from latex rubber . you'll see it again on sunday . I got er checked out and greased for werk :D

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Cooper-If I were doing this I would simplify the tread pattern. In this picture the mold would have some very thin sections and if prepped correctly and waxed properly it might work but if it sticks any to the small sections the mold will tear and be ruined. Here is a place that will tell you everything about the different rubbers, waxes, etc.-
http://www.smooth-on.com/Silicone-Ru...tml?catdepth=1
Good Luck

Re: Great Dane excavating co.
 

Thanks!! The pic was just an idea, the final tree pattern will be more like the 1:1 machine tires. Maybe some modifications to make release a bit more easier too. I was just happy that I figured out how to use the software !!!!

Re: Great Dane excavating co.
 

Cooper
Back to the 3stage cylinders, we also made a double acting 5 stage cylinder, I had 3 oil baths but got it working in the end. In this cylinder we but oil in on the small end, this was done by inserting a tube into the end you but the oil in, the tube went down to the bottom end of the small stage which had a solid piston with a hole the od size of the tube and a o-ring in the hole. This tube allowed the oil to enter the bottom of the cylinder always had the large stage move out first followed by 2cd then small stage. Now if some of you out there want a double acting 2 to ? cylinder I can supply the information, there is a trick to it, but it sure makes the dump box come down faster.

Earl

Re: Great Dane excavating co.
 

I'm intrigued Earl. Our Euclid has a 3 stage cylinder and it powers down because the box tips past center. I would like to know how it works.

Re: Great Dane excavating co.
 

Earl, I think I can make this double acting fairly easily. On the small diameter rod I may use solid stock and drill two holes length of it. Side by side so to speak. One completely through and the other stoping at outlet hole. The hard part would be having such a small workpiece keeping drill holes true. And being creative on end for fittings and mounting hole. Probably solder brass tube for extended location of fittings. But I think it could be done. And then a regular servo controlled valve could be implemented for up/down operation. I have been worried about having enough force to retract the cylinder if it was single acting. And you if it were double acting movement could be more controlled for extension and retraction. Plus when the cylinder was in any position it would stay there. Single acting it tends to drift, oil back feeding through pump when not engaged. That would be eliminated. Thanks earl, you help my understanding of this mini project.

Re: Great Dane excavating co.
 

http://i1357.photobucket.com/albums/...psndknbiio.png

http://i1357.photobucket.com/albums/...psc5atlzzr.png
Single and double acting cylinders reg, on the double acting one the diagonal tube is what I'm talking about. That one needs to penetrate complete stage of that rod. The other hole I would make would only have to penetrate to the oil port on side of that stage.

Re: Great Dane excavating co.
 

You said penetrate...Sorry, I'm still a 12 year old boy at heart...:rolleyes:

Re: Great Dane excavating co.
 

At least we aren't astronomers!!! I would been kicked off a long time ago!! Ya know all the planned trips to Saturn and Uranus!!! :) lol!!!!:jaw:

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Haha, 4 sure! I figured you were on my level there. Now where's Mario when you need a third teenage brain?:lol:

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News flash! We never went to the moon and sure as heck ain't going to Uranus ! :lol:

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Re: Great Dane excavating co.
 

There he is! That's my boy!:lol::lol:

Re: Great Dane excavating co.
 

This is a breath of fresh air, it does me good to see guys having a good time and playing nice.

Re: Great Dane excavating co.
 

We're all like Beavis and Butthead

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I'm sorry, and don't mean to continue the thread high Jack but, I hate Beavis and would rather be compared to the trailer park boys :D:lol:

Sorry RW........ As you were saying....:rolleyes::p

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Fire fire fire yeahh fire!!!! :)

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Just push the big shiny red button. But Ren,,,, shut up stimpy ,,,just push the button!!! Stupid cat!!

Gotta love those stupid comic shows that make you lose brain cells when you watch,, old Ren and Stimpy show.

Re: Great Dane excavating co.
 

Man i am think more like the three stooges.:p:D

Re: Great Dane excavating co.
 

Uhhhhh, we're like, gonna score, HUH,HUH,HUH,HUH,HUH,HUH YEAH, YEAH, YEAH!

Sorry....I was a fan of Beavis and Butthead....lol

Re: Great Dane excavating co.
 

still sitting in the pathfinder. had a blast today witb you rw

Re: Great Dane excavating co.
 

OMG , you killed Kenny