Daily Kennebec journal. [microfilm reel] (Augusta, Me.) 1870-1975, 1890-12-02
a b 1ut Circular Saws.

The successful working of machinery At
all tines depends raueh gpor the conditions
ander which il is used and the care
Borrowed upon il. II the manu- faeturer
were always sure thst his machine would
fall into the bands Of expert and skillfai
mea, who thoroughly understand the con-
di,ions required 10 order 10 obtain the bes:
| results, there woui! be less anxiety on bis
cart and less oeeasi0a for fault finding on
the part of the purchaser. Probably no
elass % manufacturers are subjected TO
more annoyance from these causes than the
manufacturers of circular mill saws. No
two rsills will be found where the working
conditions under which the saw is required
20 perform its work are alike, aud /. is
impossible for the saw maker 10 always
know jast what ,hose conditions are.
IL is true If the saw maker is inform
Jest what speed the saw is to rua, the k;nd
OF lumber to be sawed and the rate Of Il ed
required, he may ADJUST the tension of the
saw approximately 10 those conditions 50
TIA. if everything else is favorable q saw
may start If and perform i.s work in sat
i'fsctory manner. Blu. there are 50 many
other things That may operate against il,
thst when taken into cousi ierstion, it is a
wonder that so many start off satisfactorily
and fuldll the conditions required of them.
While imperfect collars and carriage
out OF square with tho mandrel are impor-
tant factors that are frequently met with,
often preventing the rev saw from working
IN satisfactory manner, yet these are mat
tiers that may be easily remedied By an
experienced sawyer. But the principal
d tiiculty in most cases is 10 the tension. A
,ua be NJ . ~. ta1
sion for q certain speed, but what assurance
hiss he that the same speed will always BE-
kept up. ANY experienced sawyer knows
that saw hamm red to the proper tension
to run six hundred revolutions per minute
everything else being equal, will work well
if that speed is maintained, but if he attempts
TO run the same saw with the same tension
at a speed of four hundred revolutions per
minute be will lud the conditions entirely
changed and the chances are that it would
rot work at all
And just here is where much Of the
trouble with mill saws originates. Hun
dreds Of mills all over the country may be
fourd where the power is inadequate 10
maintain uniform speed at all times and
under all conditions, especially so with a
cass of mills that are operated by water
power. The speed is irregular and cannot
be depended upon. 1t may be all right
when the Jaw is running idle or i. may be
kept mp in small sized logs but when
large log is being saved the speed may run
down one-half~ before the saw is half wsy
through the log.
Now how can a saw be expected to stand
up to its work under such conditions. Tue
only practical remedy that can be suggested
ia cases Of this kind where the power can
no: be increased. is to decrease the feed or
have variable one that may be adapted to
the size of the log, but by all means keep
the saw up to its regular speed. Ficding
fault ard writing ugly letters to the saw
maker will not help the matter one particle
for it should be understood that no saw
maker can adjust a saw 10 a tension that
will work well under speed varying from
four to six hundred revoluti ms per minnie
The practice of stopping the feed
entirely 10 allow the saw to recover its
speed and then slashne it into the log AID
stacking it down again is a Rad one. no
matter how well il is practieed. 1t is much
better to adapt the feed to the power so re
to allow the saw TO run at all times az its reg
ular speed - The Chicnqo Tim5ermqn,