The Waxahachie daily light. [volume] (Waxahachie, Tex.) 1894-current, 1915-09-18

fine gray iron. After IL Is rough
cast II Is machined 10 perfect round
mess The center Is then bored out
with perfect accuracy in reference
to the circumference A shaft is
put through this center to ride on
four wheels which are mounted on
ball bearings II there is q fraction
OF an ounce OF difference in the
weight OF any side Of the wheel, that
side OF the wheel will turn to the
point nearest the ground. The work
man balancing the Fly wheel b6res
or drills the heavy side of the wheel
until every side is brought exact
ly to balance. When his work Is
/ finished. the Fly wheel will be bal
anced like the balance wheel OF a
watch--in fact, the same method liz
used.
There are four bolt holes bored
in the fly wheel which admit the
bolts fastening it to the flange of the
crank shaft.
You might think that fairly ac-
curate bolt hole of about the right
diameter would be satisfactory
However, the writer. while visiting
the department which manufactures
lily wheels, noticed go-and-won't-
go gauge. On it was stamped
- snar,, - :. raaos ,, r,h. ,,,ss<.
ence. as you will note, is .00e75. or
ithree-quarters of one one-thousandth
Iof an inch. This gauge is used to
test the size of the bolt hole in the
| fly wheel. The "go" side of the
gauge must fit tight in the bolt
hole. The won't go" must just fail
to center If it enters, the fly wheel
| is rejected.
Most manufacturers use a cast
babbitt crank-shaft bearing which is
reasonably accurate. They put the
crank shaft on it and then scrape
the bearing to get smooth bearing
surface.
Studebaker uses an additional OPP
GRAFTON which is essential TO Stude-
baker accuracy. An expensive ream-
ing machine is used to line up the
i after they are put in the motor. This
roaming machine also cuts the bear
ling surface perfectly smooth In adj
ldition to this, the crank shaft is plac-
ed on the bearings, and any possible
inequalities which remain are then
scraped out by hand work.
Pistons are made of the finest
gray iron. They are. ground accu-
rate in diameter and perfectly round
to one one-thousandth of an inch !:
Ithen they are balanced, and each If
the four pistons or the six pistons
which enter the Studebaker motor
must be of the same weight within
the balancing limit of fine pair of
scales.
They are fitted into the cylinders
by what is called tapping" pro-
cess A master piston. with master
rings fabricated with graphite and
Kerosene is revoked in the cylinders
for one hour. AS il revolves it is
plunged in and out OF the cylinders
The result is satin-smooth, CLASSY
hard surface. The piston is made 10
exactly fit this smooth surface.
There are very few manufacturers
who go to the expense of fitting piss
tons into the cylinder with the lap
ping" process.
Each set of pistons, connecting
rods and eonneetingrod bearings ex-
Iactly balances every other set of pis-
tons, connecting rods and connect
rod bearings in either the Four or
the Six motor.
The crank shafts and the connect
ing-rod bearings are adjusted BY
hand with "shims,' which can be re-
moved one at time as the bearings
wear after miles OF service. ineSe
shims ars finer than the thinnest
paper.
There are eighteen different and
distinct mechanical operations re-
quired to develop the gear wheel.
While the steel material was being
developed by the engineers, expert
machinists were perfeeting machin-
cry to cut and grind the hardened
steel surface.
The entire motor is put together
by hand When assembled 1t IS belt
ed on a machine and with ample lu-
IRRIGATION is run by outside power for
two hours II is then taken apaft
and the bearings are re-scraped and
re-adiusted.
1t is then placed on the block and
run under its own power Tor two
hours and half.
II is again inspected, and finally