Friction Pins
Perhaps the most ubiquitous of all Technic parts, the
friction pin, was introduced this year. At first it may look just
like a standard Technic pin, but there is an important
difference. Standard pins rotate freely within the holes in
beams, and are removed fairly easily. The friction pin has axial
ridges along its length which make it fit snugly. So snugly, in
fact, that it is extremely difficult to remove them. A later
modification to this part would fix the problem, but early pins are
notoriously difficult to remove without resorting to metal tools which
damages the part. One solution is to make a tool as shown in the
lower picture to push them out.
4.5V
Motor
Also new for this year was the first motor actually included in a
regular set. This motor runs on 4.5V using a battery box with 3
C-cell batteries in series. The motor is DC, so there is no
incorrect way to hook up the wires; reversing the polarity simply
reverses the direction. The motor output is a standard Technic
axle form to
accept gears, but it also has a slot in it which can drive a
belt. The battery box is the same profile as the motor but much
longer. There is also a three position switch
(forward-off-reverse) which can be placed in series between the motor
and the battery box.
The same motor was previously available in Supplemental Set 870, but
with a different battery box. This motor was only ever included
in Universal Sets and Supplemental Sets.
|
|