Honolulu star-bulletin. [volume] (Honolulu [Oahu, Hawaii]) 1912-2010, 1915-10-26
George Duncan Brings Up the
Question at Meeting of
Sugar Mil Engineers

.
Completing the second important
business session OF their convention.
the third annual meeting OF the sugar
mill engineers this morning concluded
two important phases OF their discus.
sions. milling and clarification.
After the discussion had brought up
several important points concerning
growing, George Duncan, chairman
OF the milling committee, asked: But
with all this elaborate growing and
higher extraction. the. question is:
Does it pay? What ] have been try.
ing to find out is how much expense is
incurred in the maintenance Of rolls
grooyed In this manner. for it is need.
less to say that there is not any, for
one cannot escape the pitch Of
grooves without a new roll shell.
again, IL piece of iron comes
along and breaks out a piece between
the grooves, 1t means new sleeve
again. Take a walk through any of
the new iron works just now, and
one wonders where all the rolls came
from. Has anyone ever tried the oxy-
acetylene welding apparatus for the
repairing OF rolls, such as parts that
have been broken out, etc? Can parts
so welded be as easily machined as
the original ironT
Concerning the growing problem,
r. Renton Hind said: THE cast.
steel roller which was installed at the
beginning OF the season has done re-
markably well. Contrary to opinion
which was advanced by some people,
1t is mo smaller today than the day it
was put in, showing that cane juice
has no appfeciable action on cast steel
when employed as a material for roll
ers. We did not, however, recon.
mend q cast.sfeel retiirner bar in con.
junction with caststeel rollers, but a
substitute such as gun metal or brass
might be used to advantage"
: When the discussion came to mill
housing communication from III. x.
Scholefeld of Kona was read TO the
following effect:
Loss from Friction.
"a matter OF considerable moment
which commonly receives no attention
is the undue friction loss at the coupl.
ings caused by the fact that the nor
NAL position OF the top roll when
working. is either above or below the
level Of the power shaft.
while the amount OF lift Of the top
roll varies between different mills.
there Is for every mill an average
amount, a point where the roll works
under normal conditions. The amount
Df the lift should be ascertained and
with the level of the driving
shaft.
Il recommend a surveyors level or ]
transit for this work, as sights can be |
taken when the mill is working A
bench mark. the exact height of the |
iriye shaft centerline, can be estab-
ished on. some immovable object, so
hat the height of the roll can be com
pared with this mark any time"
Mr.. Hind and others expressed their |
opinion that what seemed to be the
shredder OF the future was the Searby
shredder, which has been giving won
ierful results at Puunene, where it |
las been In operation
Do Away With crusher.
"A question OF vital Importance
aid A. M. Simpson of the committee /
m milling, @and which I hope win be
AIKEN up by the meeting, is whether
hose shredders can be operated with.
tut being preceded by a Krajewski
.rnsher The installation OF them
Without crushef would be very much (
and the cost OF installing
'ery much reduced
The milling committee consisted of I