[MOC] Demolition Excavator

[Triswa]

Hello all,

I've been reading this forum for a while now, I used to build a lot with Lego, but had a dark period of around 8 years.
Last Christmas I've picket it up again with the 42042, and then I was hooked again.

This is a moc I had in my head for years but just not the right parts available for it, so I was really happy Lego decided to make bigger cylinders.
But still i would like to have 15L and 3 wide cylinders to complete the package and not use steel cylinders.


The scale I am building in is 1/31, I really like the possibilities the panels offer and the new rings from the 42055.




To bad for the non Lego cylinders else I would have competed in the TC10

Edited September 23, 2016 by Triswa

[KamalMYafi]

WOW, that's HUGE!

Too bad for the non-LEGO cylinders, so you can't join the TC10.

[iLego]

Can you please provide some details on the custom cyinders. Where to get them ? How much do they cost ? Their power compared to regular Lego cyinders ? How to mate them to Lego parts ? Thank you !

[agrof]

Big like for the project, I consider the metal cylinders like the third party tires.. it is fine to use them here.

For TC10... You can still enter with this concept, just go for a smaller scale.

[syclone]

Interesting MOC, I don't remember any other of this concept. Can you provide details about the metal cylinder?

[Triswa]

Some progress made the worktool.

The cylinder I use are standard MA type pneumatic cylinders, these were old ones from a scrap yard.

I have ordered some more on aliexpress the bore I use is 16mm Lego around 12mm with a stroke of 75 mm but I'll also order some 100 mm stroke.

To connect them I bored out the connections to the size of a pin connector 2L and use some small orings as spacer.

Edited August 20, 2016 by Triswa

[Myers Lego Technic]

Interesting 3rd party pneumatics.

[MRP_]

interesting idea, looks absolutely awesome, and the size is quite impressive! have you considered using linear actuators in place of the steel pistons, to enter in TC10?

also I am aware of what I just said be mature keep your mouth shut

[Dafgek81]

This is a great MOC!!!

Never seen such a machine build in Lego at this scale.

Can't wait to see a video of it working.

Like the third party cylinders also, bur can the Lego pumps generate enough power to run it.

Edited August 20, 2016 by Dafgek81

[Triswa]

Small update,

I've got my new Chinese cylinders in and dit the mod to Lego for them. Type is MAL 16 75mm or 100mm stroke.

What to do is get an 7.9 mm drill and bore out the connection on the bottom original this is 6 mm it is quite easy to do.

Next are the connections these are M5 to 2.5/3 mm hose fuel line connectors for RC cars. I fitted them with Locktite to have a good seal.

 

For the top side also use the 7.9 mm drill to fit the 2L connector.

And an update on the build, the new cylinders have a bit more stroke so I had to redo the chassis and first boom part.

To get the look more similar I used more panels to build the first boom section, the top part will also get an revision.

In the chassis I am going to integrate the air compressor, air tanks and also the controls, the color scheme will also change to yellow completely.

[Jeroen Ottens]

Maybe if you use two long Lego cilinders end-2-end like in the Mk1 crane you can get enough stroke with legit lego only and are you able to enter TC10...

[Triswa]

http://bricksafe.com/files/TRISWA/demolition-excavator/IMG_20170216_220257.jpg/800x600.jpg

http://bricksafe.com/files/TRISWA/demolition-excavator/IMG_20170216_220308.jpg/800x600.jpg

Finally had some time to work on this again.

I've ordered the bearing support from Efferman last weekend and it already arrived today.

They fit well and a nice compact solution.

So now another rebuild of the chassis hopefully the last one, but we will see.

 

 

[Mantarri]

Wow, I've always liked this certain type of machine, give me ideas of my own....

Anyway, to the person to the person who suggested using LAs to be able to enter in TC10, TC10 said LAs weren't allowed. :(

[evortigosa]

WOOOW! It is massive and awesome !

Can you provide a video, please? I cant wait to see it moving !