Historical Background Information

The construction of the linkage with the idler wheel was several times modified. There are 2 major versions, starting around 1950 with the F 50-8, Lenco used this first version also in the B 50-16.

The first idler wheel linkage version used in the

F 50-8 and B 50-16

The axle in this version is 3 mm !

…to be continued (under construction)

First linkage version

in a F 50-8

Idler wheel plastic 

with old linkage

Idler wheel plastic 

with 3.00 mm bearing

Old idler wheel

with all parts

Old idler wheel

spring and clips