efferman

when you make a part wich have to rotate in a other printed part you need 3 tenths of a mm between the parts in your cad file. holes should have 4,9mm in diameter and in the printfile they should oriented vertical to avoid oval holes. Crossholes are 4,9mm in diameter too. the cross is in the file 1,85mm thick. And you should avoid thick walls around crossholes or they will be highly possible to tight. my walls are mostly 1mm thick, on high load situations 1,2 bis 1,5mm. when you make your printfile make a connection between the parts to save money. I use for this afull circle 2,9mm bolt with 5mm disks at the ends, and this is inserted into pinholes.

have you thought about to upload it on shapeways?

Oh, it is not my crane, i have only solved some stability problems for a friend.

thank you very much. It seems the grey marker fits really well.

interresting idea. could you please make a picture?

Tommy i have filled the holes. now it is a full 2mm thick disk. edit: the turntablesupport is now available with a diameter of 17 studs.

It would fit better than the 17m version.

Yes! If you need maybe a 17m version, wait a few days.

the turntable support?

It makes it simply more flexible.

It should be stable enough, but when you fear a break i will add something.

aah, it fits. tommy, the 14 teeth sprocket gear is now available and some other parts which looks asssembled like this

I really like your design. especially the thrust tubes around the propellors. why not a tug with voight schneider propellors?

tommy, the 7 hole diameter sprocket has 14 "teeths" i have set the holes in a cross to make it easier to put plates on it. The whole sprocket gear is only one stud wide to make the chassis more flexible

the instruction is done. many thanks to martinsch https://www.dropbox.com/s/bexrjbg1pq2hfiq/42049_Mining_Loader.pdf?dl=0

Tommy look at this maybe this sprocket gears are fit to you. @aleh sure https://www.shapeways.com/designer/efferman

A christmas gift a long long time ago. Thanks for bringing back the memories.

@ctx1769 less parts improves creativity. some progress on the crane and chassis

today i had a idea for a rotation limiter which allows more than a full rotation. on the pictures it is only a little under one rotation but this is to change with a different gear ratio

gmshades, it should work if you find the correct mounting positions.

i think a picture says more than thousands of words

a small update on the crane

yes, but only the driver of a bwe likes his bwe

Bucket wheel excavators are popular in germany? ok, they are impressive of its size, but on other aspects they are really boring.

I think a pneumatic rotation mechanism would rise the playability and be more interesting in technical aspect. The gear ration on the pictures allows 1.25 rotations.