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Author Topic: 1:35 Bucket chain excavator Ertmer KB 1  (Read 59575 times)
Bernhard
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« Reply #135 on: January 19, 2020, 04:04:49 AM »

... and in step 3, we put the stiffeners in place.


* KB1 104.JPG (224.23 KB, 1134x417 - viewed 288 times.)
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Bernhard
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« Reply #136 on: January 19, 2020, 04:05:21 AM »

Now the bottom plate in this piece of the bucket ladder is still missing. For this I first mill a bending jig out of wood.


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Bernhard
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« Reply #137 on: January 19, 2020, 04:05:51 AM »

A soft annealed brass sheet is bent over this. It is important that the width is exactly right, because the sheet must be fitted exactly at the bottom of the bucket ladder.


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Bernhard
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« Reply #138 on: January 19, 2020, 04:07:37 AM »

Then the excess of the sheet metal is carefully milled off. Here the milling is done in a synchronous way so that the milling cutter presses the brass sheet against the gauge and not away from it.


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Bernhard
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« Reply #139 on: January 19, 2020, 04:08:04 AM »

The U-shaped sheet is separated into two parts.


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Bernhard
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« Reply #140 on: January 19, 2020, 04:08:45 AM »

The bending gauge is converted to a soldering gauge with an additional piece.


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Bernhard
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« Reply #141 on: January 19, 2020, 04:09:12 AM »

The finished bottom plate.


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Bernhard
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« Reply #142 on: January 19, 2020, 04:09:41 AM »

And here is the finished upper part of the bucket ladder. The four support rollers for the chain are mounted only after painting, so that no paint mist gets into the bearings.


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Bernhard
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« Reply #143 on: January 19, 2020, 04:10:08 AM »

But then the nasty surprise: the bucket ladder does not fit into the excavator. I did not use a spacer for the bucket ladder when assembling the two side frames. So I had to try to push the two side frames carefully a few tenths of a millimeter apart without damaging anything.


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Bernhard
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« Reply #144 on: January 19, 2020, 04:10:43 AM »

Fortunately it worked! Now the bucket ladder can be installed.

Bernard


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Design-HSB
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« Reply #145 on: January 19, 2020, 04:13:10 AM »

Hello Bernhard,

congratulations absolutely outstanding craftsmanship.

Thank you for showing.
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Regards Helmut
the journey is the goal
finescalerr
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« Reply #146 on: January 19, 2020, 03:14:11 PM »

I am so impressed, not only with this latest assembly but with the entire model so far, that I have no idea what to say. -- Russ
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Ray Dunakin
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« Reply #147 on: January 19, 2020, 07:05:52 PM »

Incredibly impressive!!
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Visit my website to see pics of the rugged and rocky In-ko-pah Railroad!

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Hydrostat
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« Reply #148 on: January 20, 2020, 12:53:00 PM »

Ditto.
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I'll make it. If I have to fly the five feet like a birdie.

I'll fly it. I'll make it.
Hauk
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« Reply #149 on: January 21, 2020, 07:52:57 AM »

Fortunately it worked! Now the bucket ladder can be installed.

Glad it worked out. Fantastic project!

Have you received the casting for the buckets, by the way?
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Regards, Hauk
--
”Yet for better or for worse we do love things that bear the marks of grime, soot, and weather, and we love the colors and the sheen that call to mind the past that made them”  -Junichiro Tanizaki

Remembrance Of Trains Past
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