Geobra

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Geobra Construction System

Geobra was a simple construction system which used braced panels to make tower cranes etc. It was made in Germany in the mid 1950s

Manufacturer / Distributor

Georg Brandstätter, Zirndorf bei Nürnberg, Germany

Info from the Metal Constructional Systems Database for GEOBRA (Ref:GBR)

Maker

System Type
Non-Meccano type

Country
Germany

Dates
known in 1954

Material
Steel

Thread
M3

Boss Type
no boss

Boss Thread
----

Diametrical Pitch of Gears
19 (approximately)

No. of Parts in System
32 (see comment *¹)

Hole Pitch (Spacing) (mm)
Variable

Diameter of holes in Strips(mm)
3.2

Diameter of the Bore in Bosses(mm)
3

Diameter of Axle Rods(mm)
2.9

Types of Nuts and Bolts
Nuts: --
Bolts: cheese (crosshead)

Material/Finish of Nuts and Bolts

Size of the Nuts across Flats (mm)
---

Bolt diameter (mm)

Comments
Braced Panels joined by Bolts into formed threads. 2 sets known, similar but different size parts. *¹ 22 also reported, perhaps from one of the sets?

The MCS document for this system is shown below. It can also be downloaded to your computer if desired here

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Pages from the 'Other Systems Newsletter' which contain information on this system are shown below. They can also be downloaded to your computer if desired here

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The report can be zoomed into, made full screen or downloaded as a pdf document by using the controls provided

Below there are manuals/leaflets and photos which can be downloaded by clicking on the appropriate image.

A Geobra instruction booklet
(Added 29/03/2021)

Photos of a Geobra set
(Added 29/03/2021)