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Author Topic: 1:35 Bucket chain excavator Ertmer KB 1  (Read 52665 times)
finescalerr
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« Reply #90 on: December 30, 2019, 01:58:02 PM »

Satisfactory. Thank you for posting your progress and happy new year. -- Russ
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Bill Gill
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« Reply #91 on: December 30, 2019, 03:12:51 PM »

Your work is very impressive. (I don't know enough to comment beyond that, but I recognize excellence when I see it).
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Ray Dunakin
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« Reply #92 on: December 30, 2019, 11:10:46 PM »

Holy cow, that is some impressive work! Those tiny pillow blocks look like they're not much bigger than the eye of a needle.
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Visit my website to see pics of the rugged and rocky In-ko-pah Railroad!

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« Reply #93 on: January 03, 2020, 10:17:23 AM »

Since it is actually all very small, it is a gigantic work.
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Regards Helmut
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Hi, I'm Kim.


« Reply #94 on: January 03, 2020, 06:16:24 PM »

Hi Bernhard.
Happy New Year.
this is a very nice piece of model engineering you are a very good machinist. Was this your profession?
cheers
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Bernhard
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« Reply #95 on: January 05, 2020, 10:12:42 AM »

Thank you for your interest, and to all a happy new year.

Kim, I'm an engineer, not a mechanic. But I worked for many years in technical sales for a company that builds special machines for the watch industry, among other things. I learned a lot from them!
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Bernhard
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« Reply #96 on: January 05, 2020, 10:14:04 AM »

Let's start the new year with the production of the casing for the drives. Here the situation on the prototype and the model.


* KB1 059.JPG (226.56 KB, 666x446 - viewed 278 times.)

* KB1 060.JPG (54.64 KB, 779x847 - viewed 250 times.)
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Bernhard
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« Reply #97 on: January 05, 2020, 10:14:55 AM »

First of all I milled again a gauge for soldering the two inner frames.


* KB1 061.JPG (172.04 KB, 709x510 - viewed 230 times.)

* KB1 062.JPG (223.27 KB, 709x573 - viewed 271 times.)
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Bernhard
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« Reply #98 on: January 05, 2020, 10:15:28 AM »

In this one the two mirrored frames are soldered.


* KB1 063.JPG (229.82 KB, 794x585 - viewed 285 times.)
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Bernhard
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« Reply #99 on: January 05, 2020, 10:15:57 AM »

The two finished frames.


* KB1 064.JPG (221.92 KB, 816x463 - viewed 283 times.)
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Bernhard
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« Reply #100 on: January 05, 2020, 10:16:42 AM »

Over the frames come the sheet metal parts, which are etched.


* KB1 065.JPG (203.38 KB, 794x646 - viewed 284 times.)

* KB1 066.JPG (195.33 KB, 850x706 - viewed 244 times.)
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Bernhard
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« Reply #101 on: January 05, 2020, 10:17:23 AM »

That's pretty good so far.


* KB1 067.JPG (179.91 KB, 765x539 - viewed 252 times.)

* KB1 068.JPG (216.07 KB, 734x711 - viewed 265 times.)
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Bernhard
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« Reply #102 on: January 05, 2020, 10:18:08 AM »

This is followed by the more complicated casing of the chain drive. The parts are also etched, and must now be assembled into a box.
Since I had little experience with etching at that time, I disassembled the casing into individual parts. It would have been simpler to draw a flat projection with bending edges.


* KB1 069.JPG (228.59 KB, 734x571 - viewed 261 times.)
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Bernhard
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« Reply #103 on: January 05, 2020, 10:18:41 AM »

The lower part is already finished.


* KB1 070.JPG (229.61 KB, 782x606 - viewed 262 times.)
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Bernhard
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« Reply #104 on: January 05, 2020, 10:19:22 AM »

The upper inner side part must be halved so that the cover can be put on later, after the chain drive wheels have been mounted.


* KB1 071.JPG (148.9 KB, 850x643 - viewed 248 times.)
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