instructions for a Scalextric motor pinion gear - 9z
This process does not
require specialist gear pullers or other tools
Warm the gear to at
least 30 degrees centigrade which will allow the plastic to stretch
over the motor shaft without splitting. Simply holding the gear
in a warm, closed hand for a few minutes will be sufficient or soak
the gear in a container of warm water for a few minutes.
Place the gear on a hard
surface with the circular flange facing upwards.
push the motor shaft into the hole in the centre of the motor pinion
gear. Use a constant gentle downward pressure.
Continue until the motor
shaft is right through the gear and touching the hard surface.
||Here the motor
pinion gear is partly fitted. The shaft is flush with the face of
Position the motor
shaft over a void or hole in the hard surface. In this picture a
gap in the jaws of the pliers is used.
Again apply constant
and gentle downward pressure to push the gear along the motor shaft
and into the correct final position.
Here the motor pinion
gear can be seen in the correct final location along the motor shaft.
The exact location may
depend on your specific application.
This pinion gear is
used to service several different types of motor pinion gears
fitted to several different Scalextric motors used over the years
(decades). With some motors, especially those with poor or missing
spines it may be necessary to reduce the diameter of the internal
hole of the pinion gear. This will ensure the pinion gear is a
good tight fit onto the motor shaft.
To do this, use an
opened up paper clip to smear a little superglue on the inside
of the pinion gear. Allow the superglue 1 hour to set fully before
a trail fitting the pinion gear to the the motor shaft. What you
want is a good tight fit where the pinion gear will slide onto
the motor shaft with a some effort. Add another smear of superglue
onto the inside of the pinion gear if necessary. Allow this to
dry fully for 1 hour before trail fitting again. Repeat as required.