|
Finishing
Gears Construction
Nelson Riedel,
Nelson@NelsonsLocomotive.com
4/07/2006, last updated
04/08/2006
The wheels had just been machined and painted so it was possible to finish the gear cases
and associated axels.
|
Swivel Shaft HM 314: The swivel
shafts hadn't been made so that was the first task. For
the bases, 3/4" square
brass bar was used rather that the 5/8" wide bar stock
specified in the design section.
The photo shows using a boring head to cut the 1" radius on the
base. Note that the block is positioned at an angle (10 degrees) in
the vise. A similar technique was used to cut the 7/8" radius
in the base for the middle truck swivel shaft (HM 317) |
 |
| Pieces of 5/16" drill rod were silver soldered in
holes in the the bases. The bases were then attached to the gear
cases with a couple 6-32 screws. These screws went through
the gear case but not the pinion tube (the screws were ground flat
inside the gear case tube using a small grinding wheel in the
Dremel). There is no reason for the swivel shafts on the
outside trucks to ever be removed so the attachment is considered
permanent. The photo shows the swivel shaft on a gear case after it was painted (powder
coated).
A 6-32 screw was used to secure the pinion tube at the gear case.
The top of the screw head is visible near the top of the photo.
The wheels - spacers - wheel bearings were installed using the
same techniques as used for the non geared axels. See
Wheel Construction.
|
 |
| This photo shows an assembled outside truck gear
case with axel and wheels. A non geared axel is also shown for
comparison. The axel pump eccentric is installed on the geared
axel so this is the front truck. |
 |
| Middle Truck Swivel Shaft (HM 317): The
middle truck swivel shaft is shown on the right. The recess in
the gear case and pinion tube was cut with a 3/8" mill. The
swivel shaft must be removed to slide the swivel bearing over the
end of the shaft. |
 |
| Middle Truck: This photo shows the axels and
gears for the middle truck |
 |
Photo above shows the the six axels with wheels and gears.
These will be set aside until the truck castings arrive.
| 