Construct-O-craft

Construct-O-craft Construction Sets

Construct-O-craft was a Meccano-like construction system. It was made in the USA from 1945 to at least 1948.

Manufacturer / Distributor

Boxaqr Tool & Manufacturing Co., Chicago 12, Illinois, USA
From 1948: Hedge Tool & Manufacturing Co., Chicago, Illinois, USA

Info from the Metal Constructional Systems Database for CONSTRUCT-O-CRAFT

Maker

System Type
Meccano principle but sig. differences

Country
USA

Dates
1945 to known in 1948

Material
Steel

Thread
6-32

Boss Type
separate threaded boss (see comment *¹)

Boss Thread
6-32

Diametrical Pitch of Gears
30

No. of Parts in System
43

Hole Pitch (Spacing) (mm)
12.7 (multiples of value shown, including half.)

Diameter of holes in Strips(mm)
4.0

Diameter of the Bore in Bosses(mm)
4.0

Diameter of Axle Rods(mm)
3.8

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

Material/Finish of Nuts and Bolts
Steel with a Dull plated finish
(see comment *²)

Size of the Nuts across Flats (mm)
6.4

Bolt diameter (mm)
5.7

Comments
Strips embossed with crenellated pattern. *¹ PulleyDiscs joined by hex threaded boss (¼"x32). Also normal bosses. Both types single tapped. *² Nut: dull plated brass. Also Nut hex/zinc plated steel/6.3; Bolt Round/plain steel(or zinc plated steel)/6.3.

The MCS document for this system is shown below. It 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/leafets which can be downloaded by clicking on the appropriate image.

A Construct-O-craft manual for set 500.