1:35 Bucket chain excavator Ertmer KB 1

[Bernhard]

It's done! The ball bearing for the drive shaft and the two slide bearings for the axle are still missing.

[Bernhard]

The second wheel carrier is created in a similar way.

[Bernhard]

And here the provisionally mounted travel drive, still without drive motor.

[Bernhard]

This is the base frame with the mounted travel drive. A first test shows that everything rotates and moves as intended.

[Bernhard]

However, I had to separate the motor mount from the wheel carrier afterwards. Otherwise it would not have been possible to remove the drive from the base frame.

Bernhard

[finescalerr]

Good golly, Miss Molly!!!! -- Russ

[Ray Dunakin]

Wow! Fantastic work!

[Bernhard]

Next step: the two side frames.

[Bernhard]

So that both frames are exactly the same, I mill a solder jig out of an MDF board for the assembly. I do this on the rotary table because some of the profiles are 45° inclined.

[Bernhard]

All profiles for the two frames are cut to exact length and mitred where necessary.
The material: U-profile 2.5 x 1.5 x 0.3 mm.

[Bernhard]

The profiles are placed in the jig and then soldered at the points of contact.

[Bernhard]

And here's the current result.

[Bernhard]

All sheet metal parts for the entire casing of the excavator are etched from 0.2 mm thick brass sheet.

[Bernhard]

The two frames and the cover sheets are glued together to form a solid box.

[Bernhard]

First mock-up of the finished box on the base frame.

Bernhard