Honolulu star-bulletin. [volume] (Honolulu [Oahu, Hawaii]) 1912-2010, 1915-10-26
George Duncan Brings Up the.
Question at Meeting of
Sugar Mill 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 Qualification.
After the discussion had brought W
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 l have been try
ing to find out is how much expense is
Incurred in the maintenance Of rolls
grooved 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 q piece OF iron comes
along and breaks out a piece between
the grooves, it means new sleeve
again. Take 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 iron?"
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 no smaller today than the day 1t
was put in, showing that cane juice
has no appreciate action on cast steel
when employed as a material for roll
ers. We did not. however, recon-
mend cast-steel returner bar in con-
junction with cast-steel rollers, but a
substitute such as gun metal or brass
might be used to advantage"
When the discussion came to mill
housing communication from H. K.
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
Of the lift should be ascertained and
with the level of the driving
shaft
4 recommend q 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
drive shaft centerline, can be estab-
Iished on some immovable object, so
that 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
derful results at Puunene, where 1t
has been in operation.
Do Away With crusher.
A question OF vital Importance,
said A. M. Simpson of the committee
On milling, "and which | hope will be
taken up by the meeting, is whether
those shredders can be operated with.
put being preceded by Krajewski
The installation of them
without crusher would be very much
and the cost of installing
very much reduced
The milling committee consisted of
George Duncan, chairman; J. E. Ken.
1edy, A. NJ. Simpson, ]. L. Renton, H.
McCubbin, o. r. Olesen, C. Breneman.
H. S. Truscott, chairman of the com.
nittee on Qualification and filtration.
opened the discussion of these import.
mt points with the following words:
Much has been written In the past
md probably volumes will follow in
he future concerning the Qualification