'Other' Constructional and Allied Systems Info & Downloads

Metal DIY Model Construction Sets

Metal DIY Model Construction Sets have parts to similar to Eitech Construction and are classified as a Polylong(1) type sets. The instructions were on the rear of the sets. The coloured parts were plastic. This is a set of four small single model Digger sets. They were made in China.


Info from the Metal Constructional Systems Database for POLYLONG [1]

Maker
 
System Type
as CONSTRUCTION
Country
China
Dates
2003 to in production in 2018 and continuing
Material
Steel
Thread
M4
Boss Type
push fit
Boss Thread
----
Diametrical Pitch of Gears
25 (see comment *1)
No. of Parts in System
50 (approximately)
Hole Pitch (Spacing) (mm)
10.0
Diameter of holes in Strips(mm)
4.2 (see comment *2)
Diameter of the Bore in Bosses(mm)
---
Diameter of Axle Rods(mm)
4.0
Types of Nuts and Bolts
Nuts: hexagonal
Bolts: pan (crosshead)
Material/Finish of Nuts and Bolts
Steel with a Bright Zinc plated finish
Size of the Nuts across Flats (mm)
6.9
Bolt diameter (mm)
6.5(see comment *3)

Comments
Various Sets (see separate list) from Polylong & other makers. Most parts as CONSTRUCTION [1] but some others. *1 Mod.1 & finer for Motor/Gear Unit.. *2 Square holes in some RCEE sets, see TRONICO [a]. *3 6.1 & 7.4 also reported.

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


Photos of a Metal DIY Model Digger Set
(Added 03/07/20)

Photos of a Metal DIY Model Digger Set
(Added 03/07/20)

Photos of a Metal DIY Model Digger Set
(Added 03/07/20)

Photos of a Metal DIY Model Digger Set
(Added 03/07/20)