Boja

Boja Construction Sets

Boja was a Meccano-like construction system with some unusual parts. It was made in East Germany in around 1946.

Manufacturer / Distributor

Boja GmbH, Eisenach, East Germany

Info from the Metal Constructional Systems Database for BOJA

Maker

System Type
Hole pitch >12.7mm

Country
Former East Germany

Dates
known in 1946

Material
Aluminium (Alloy)

Thread
M4

Boss Type
no boss

Boss Thread
----

Diametrical Pitch of Gears
8.5 (see comment *¹)

No. of Parts in System
24

Hole Pitch (Spacing) (mm)
20.0

Diameter of holes in Strips(mm)
5.1

Diameter of the Bore in Bosses(mm)

Diameter of Axle Rods(mm)
M4 (Screwed Rods or Bolts are used as axles.)

Types of Nuts and Bolts
Nuts: square
Bolts: countersunk (slotted)

Material/Finish of Nuts and Bolts
Steel
(see comment *²)

Size of the Nuts across Flats (mm)
8.0

Bolt diameter (mm)

Comments
Data for/from a Set 3. It has a 'makeshift' model sheet as label on lid. aluminium set for schools also produced. Ref: Baukästen p328, but no details. *¹ Mod.3. *² Nut brass plated steel.

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

A leaflet showing the models that the Boja set can make
(Added 25/10/2018)

Various photos of the Boja construction system
(Added 25/10/2018)