Re: 1/10 Liebherr Excavator R 984 Litronic
 

Hi Markus are you sure you used a 0.4 end mill to cut your ring gear that is like a hair diameter? If I am not mistaken that is steel you cut how many end mill did you break? 0.4 is .0155 inches are you sure you got that figure right? If it is right that was some fine work a great job. Ed

Re: 1/10 Liebherr Excavator R 984 Litronic
 

Ed , quite plausible with right feeds and speeds to depth of cut hence the long run times . Also , rigidity of machine is a big + , the lil grizzly's will not handle that size without breaking them . I have run .01" already . another thing , tool run out will kill em in these sizes .

Re: 1/10 Liebherr Excavator R 984 Litronic
 

Hi Ed, you're right! I asked Michael, who milled the stuff and he used an endmill with 0.4mm radius to match the contour. So it was a 0.8mm mill. Sorry for this and thank you for your attention.

Markus

Re: 1/10 Liebherr Excavator R 984 Litronic
 

The intricate machining involved is beyond my scope of imagination. :eek:

Do you use any lube on the balls?

Re: 1/10 Liebherr Excavator R 984 Litronic
 

Joe, of course I added some grease to the balls before final mounting. A grease nipple on a hidden place would be perfect for maintenance...

Re: 1/10 Liebherr Excavator R 984 Litronic
 

Hi Kevin, sure it´s insane! Before I started this model i planed it in 1/8 scale. Then I met Michael, he was a 1/12 guy. We came together in the middle and choosed 1/10 for our excavators and upcoming models. Well, in 1/10 scale i think the R984 will reach the 120 Kg.
This project is running since September 2011 and there are a lot of things finished, whitch I'll post shortly, so watch out for the counterweight, some reilings, the hydraulic cylinder, boom, stick(s, the R9100 is a little different), hydraulic quick coupler, bucket and of course the chains.

I saw your pics and videos on youtube with your excavator, a 984c, also ;-)

greets Markus

Re: 1/10 Liebherr Excavator R 984 Litronic
 

Hi Markus you said you used a laser to cut parts did you use a laser to cut the rough gear teeth and then finished them off with the mill or did you cut the hole gear with a mill? It was some excellent work. Ed

Re: 1/10 Liebherr Excavator R 984 Litronic
 

Ed, I gave Michael the cadfiles and he odered the lasercut steel rings. See attached some pictures, whitch shows the lasercut rings, turning the 5.5mm round groove into the internal gear on the lathe and milling the slew ring carriers out of a 30mm steel plate.

Kevin, you've to wait for motion pictures :jump:

Re: 1/10 Liebherr Excavator R 984 Litronic
 

Good morning,

here the first pictures from the cylinder fabrication. I made them for the R984 and R9100. They are made of brass tubes and chromed piston rods. Gaskets are industrial hydraulic standart. Here you see the hoist cylinders of the R984. They have a bore of 24mm and a stroke of 200mm.

More pictures later today!

cheers!

Re: 1/10 Liebherr Excavator R 984 Litronic
 

Hello Markus well this is some more very nice work. I see you soldered every thing together. I my self would have preferred threading the barrels but it your parts so who am I to tell you how to do it's only a suggestion. You are moving right along you will be moving dirt very soon. Ed

Re: 1/10 Liebherr Excavator R 984 Litronic
 

Thank you, Ed. No problem with any suggestion or different fabrication methods, this could bring some new ideas for following stuff. So they are very welcome! But in this case I want to do it scale and the cylinder can be opened by removing the (again selfmade) hex-bolts M3 from the head.

This pictures shows the rod at the piston end. It has a diameter of 16mm and received a M10 thread and a groove for the gasket. The piston was finished directly mounted on the rod for 100% center fit. After all I think the loctite on the thread should be enough to seal the rod and piston, but the o-ring can't be bad, either.
The bottom parts of the cylinder were silver soldered, because there wasn't a area big enough for soft soldering. To avoid desoldering of the cylinderheads i put them upside down in a small bucket of water.


http://img.photobucket.com/albums/v1...ps2fd3deec.jpg

http://img.photobucket.com/albums/v1...ps353fec14.jpg

http://img.photobucket.com/albums/v1...ps530fe5a0.jpg

http://img.photobucket.com/albums/v1...ps4f206ad0.jpg

http://img.photobucket.com/albums/v1...psda1e25a1.jpg

Re: 1/10 Liebherr Excavator R 984 Litronic
 

Markus very nice work on the cylinders. Permatex has a special compound for sealing cylinders and hydraulics I use it all the time and it works real good. At the moment I do not have the number for it but if you want it I can get it for you. Ed

Re: 1/10 Liebherr Excavator R 984 Litronic
 

Then the tube needed a clean-up. For this i made a simple 4 jaw chuck, whitch worked really fine for this light cut. After this i made some brass cubes for connecting the pipes. Again I made a little tool to chuck the square stock centric in the 3 jaw.

Ah, Permatex! Amazon supply this stuff in Germany. I'll take a try on the cylinders for the next model.

http://img.photobucket.com/albums/v1...psc007f34a.jpg

http://img.photobucket.com/albums/v1...ps3bb96f68.jpg

http://img.photobucket.com/albums/v1...psb414b9b1.jpg

http://img.photobucket.com/albums/v1...psb42d4bd7.jpg

http://img.photobucket.com/albums/v1...psc1308950.jpg

Re: 1/10 Liebherr Excavator R 984 Litronic
 

There are more pictures from the cylinders, so here we go. Pic 1 and 2 is the bucket cylinder (equal on the R984 and the R9100). Pic #3 is the stick cylinder (single on the R9100 with a much bigger diameter, 30mm bore and 18mm rod), pic #4 is a hoist cylinder for the R9100 and the last pc shows the front end of the R984-hoist cylinder in detail.

Hope, those many pictures are not boring you guys!

http://img.photobucket.com/albums/v1...ps66ac6e7b.jpg

http://img.photobucket.com/albums/v1...psf790243a.jpg

http://img.photobucket.com/albums/v1...psf2864c88.jpg

http://img.photobucket.com/albums/v1...ps4b8c76a1.jpg

http://img.photobucket.com/albums/v1...ps6d771cec.jpg

Re: 1/10 Liebherr Excavator R 984 Litronic
 

Ah some more of you excellent work. The tube bending is hard I have done some on my excavator. Ed

Re: 1/10 Liebherr Excavator R 984 Litronic
 

I just found out, that there is no picture in my album just showing a completed cylinder, anyway, here a last pic for now from the cylinders.

Then I wanna continue with some railing work i did for both excavators. It´s all brass tubes with 4mm diameter, just the same as for the hydraulic pipes. The railings in the last 2 pics belong to the R9100. I used a small tube bender and a microflame to heat up the pipes before bending. That makes the brass soft.

Re: 1/10 Liebherr Excavator R 984 Litronic
 

Very nice machine work. Clever turning jigs! I'm watchin til she turns sod
Keep up the good work and keep them pictures coming! :)

Re: 1/10 Liebherr Excavator R 984 Litronic
 

The best is yet to come... wait till you see how big the digging bucket is. :eek: :D

Re: 1/10 Liebherr Excavator R 984 Litronic
 

@Kevin

Hi, what kind of soldering/ brazing? Silver or soft? Did you use any flux?

@Joe

well, yes... the bucket...:cool: don't forget the chains :)

let me just throw in the counter weight. It was milled from a solid Aluminum block 410x180x80mm with a weight of 16Kg. The finished Block is round about 5Kg and way too light. It will receive some inlays from lead to bring it to the necessary weight again. I try to bring it up to 17Kg. First some drawings, you can see the lead blocks inside the weight, how it should be finished and right from the mill.

Re: 1/10 Liebherr Excavator R 984 Litronic
 

Hi Markus that Permatex sealant is Permatex Viscosity Hydraulic Pipe Sealant # 54550 I get it in 50 Ml bottle on line for $24 and change from ALL-Spec Ind . Ed