Stick a length of double-sided tape, large enough to take one of the carrier
frames, onto a clean, flat, heatproof working surface. Ensure the tape is firmly
smoothed down on the surface, with no air bubbles or foreign bodies trapped
underneath.
Remove the backing paper from the
tape, take it to one side and place on it
t hre e of the axle bearings, flanged face
down. Place the carrier frame, inverted as
shown, over the three bearings with the
bearings passing through the three holes.
Use the backing paper to carry the three
bearings and frame on to the double sided
tape, then slide the backing paper away,
leaving the three bearings in contact with
the tape and held in position by the carrier
frame. Press the bearings firmly into place on the tape and remove the carrier frame.
Repeat for the other three carrier frames.
Using a cocktail stick, place a thin fillet of multipurpose grease around the flange
root of each bearing. This will ensure that the area is kept free of solder when the
bearings are fixed into the carriers. An alternative is to use a permanent marker: the
ink should resist the flow of solder.
Place the carrier frame, the correct
way up, over the bearings and press
down firmly the back of the frame and
carriers, above Fold 2, on to the tape,
as shown here. The unflanged end of
each bearing should protrude from the
face of its carrier by a very small amount
(not quite as much as in the sketch),
and the faces of the carriers should be
parallel with the end faces of the
bearings.
Using a cocktail stick, apply a small
amount of flux around the join between
the protruding part of each bearing and the
face of its carrier. Holding a bearing in
place with a heat insulating instrument, to
make sure it doesn't move, bring the iron
with a small amount of solder to the join
bet ween bearing and carrier, and let the
solder flash round the joint. Repeat for the
other bearings. A small amount of solder
may appear on the bearing outer surface under the inner face of the carrier but most
of the bearing outer surface, in particular within about 0.5mm of the flange, should be
free of solder.
Bearing Carrier Instructions for Six-wheel Bogies
11/52
(c) PenBits Model Railways, All Rights Reserved
04/05/2017