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Techmaster Construction Sets

Techmaster was a simple construction system. It was made in America in ??

Manufacturer / Distributor

Techmaster Educational Toy Company, Chartley, Mass, USA
Distributed by the Geo Borgfeld Corp., New York, USA

Info from the Metal Constructional Systems Database for TECHMASTER

System Type
Meccano principle but sig. differences
Steel (see comment *1)
Boss Type
no boss
Boss Thread
Diametrical Pitch of Gears
No. of Parts in System
26 (approximately)
Hole Pitch (Spacing) (mm)
Diameter of holes in Strips(mm)
3.9 (see comment *2)
Diameter of the Bore in Bosses(mm)
Diameter of Axle Rods(mm)
3.2 (see comment *3) (Screwed Rods or Bolts are used as axles.)
Types of Nuts and Bolts
Nuts: square
Bolts: round (slotted)
(see comment *4)
Material/Finish of Nuts and Bolts
Aluminium (Alloy) with a Aluminium (Alloy) finish
(see comment *5)
Size of the Nuts across Flats (mm)
8.0(see comment *6)
Bolt diameter (mm)
5.3(see comment *7)

Shallow Channels instead of strips, Angle Girders, Brackets. *1 A few alloy, wood Spool, plastic Wheels. *2 Channels, 4.5 in Brackets. *3 M19, no Axles. *4 Some Bolts X-head, countersunk. *5 Bolt Nickel plated steel. *6 & 9mm. *7 & dull plated steel 6.3 known.

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

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

A Techmaster manual
(Added 09/12/2018)

Various photos of the Techmaster construction system
(Added 09/12/2018)