308 RAILWAY AGE GAZETTE, MECHANICAL EDITION, Vol. 87, No. 6.
send the spindle holders, are then inserted in the V-blocks in the
holders, and the set screws on each side are adjusted to hold
them. On the outside of the frame rail. directly over the center
of the pedestal, a circle 14 in. in diameter is seribed. Two
parallel hlocks are then placed on top of the frame, about 12 in.
apart, and a steel square. resting on the parallel blocks, is lined
To the scribed circle. The position of the two steel spindles is
then adjusted by means of the set screws until they touch the
edge of the square, which places them in the exact center of the
pedestal jaws and in a line perpendicular to the top of the frame.
The other ends of the spindles are then set in the same manner.
reference to the main driver. The accuracy of this work is
checked by means of the lining up arm on each of the other
spindles.
The text operation requires the use of the instrument shown
-16-
Brass Casting made to dotted lines
and cut after being bored to wit spindle
These edges exactly on
enter line.
Scriber
Screw
Sleat
Screw
Bore to bui
Spindle
20
Card
Fig. 3-Scribing Arm for Marking the Shoes and Wedges.
in Fig. 3, which is called a scribing arm. This is previously se;
so the distance from the center of the spindle to the marker will
be 1 in. greater than the distance from the center of the driving
Fig. 2-Lining Up Arm Fitted on the Ends of the Spindles.
The line passing through the center of the cylinders and paral-
lel with the frantes is then put up on both sides of the locomotive.
The lining up arm. Fig. 2, is placed on the projecting end of
one of the spindles and is tried forward and backward for ad-
justment with the cylinder center line. If it is found that there
is a variation. the spindles are adjusted to a position exactly
perpendicular to the cylinder center line. This operation is per-
formed for both the upper and lower spindles, and when com-
pleted for both sides insures the accuracy of their position or
Thick
Fig. 4-Gage for Use When Facing the Shoes and Wedges.
hox to the shoe or wedge face. T is then placed against each
spindle in turn and the shoes and wedges are scribed on each
side. The apparatus is then removed and the planer band. in
77
Fig. 5-Apparatus for Laying Off the Shoes and Wedges In Place on the Locomotive.
develops any inaccuracy in the setting of the cylinder center finishing the shoes and wedges, uses the gage shown in Fig. 4
lives.
After the sides are properly set for the main driver, ether
holders and spindles are inserted in the pedestals of the other
drivers and standard trams are used to locate their position in
for setting the machine to remove the proper amount of metal
and to insure the squareness of the faces.
The whole apparatus is shown in place on the locomotive in
Fig. 5
