Polyko

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Polyko was a Meccano-like construction system for use in schools. It was made in East Germany in the 1950s/1960s.

Yoder Instruments, East Palestinem Ohio, USA

Info from the Metal Constructional Systems Database for POLYKO (Ref:POL)

Maker

System Type
Hole pitch <12.7mm

Country
Former East Germany

Dates
1950s (some significant doubt) to 1960s (some significant doubt)

Material
Steel

Thread
M4 (probably)

Boss Type
tapped

Boss Thread
M4 (some significant doubt)

Diametrical Pitch of Gears
--

No. of Parts in System
16

Hole Pitch (Spacing) (mm)
12.5

Diameter of holes in Strips(mm)
4.0

Diameter of the Bore in Bosses(mm)

Diameter of Axle Rods(mm)
4.0

Types of Nuts and Bolts
Nuts: hexagonal
Bolts: cheese (slotted)

Material/Finish of Nuts and Bolts

Size of the Nuts across Flats (mm)
`

Bolt diameter (mm)

Comments
A set for schools to make simple models, with 12 'sets' in one box. The lid of the wooden box has a child's Scooter on the lid.

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