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Controls; Adjustments; Blade - Sears IO3.243OO Operating & Parts Manual

Band saw 12 inch

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above be sure to specify the shaft diameter of your
motor. Install the motor so that the direction of rota-
tion of the Drive pulley is counter-clockwise when
viewed from the pulley side of the tool.
CONTROtS:
The table may be tilted from a level position to 45
degrees forward, after loosening the table tilt lock
with the handle provided.
The degree of tilt is shown on the calibrated trun-
nion scale by . pointer as shown in figure l.
The upper
g,rid.
arrembly
may be raised and
lowered to accommodate material of various thick-
ness after loosening the blade guide elevation lock
knob shown in 6gure l.
The blade thrust roller arsemblies and the lateral
guides in both the upper and lower blade euide
assemblies may be reset after the set screw holding
each unit has been backed out several turns.
ADJUSTftTENTS:
This band saw was completely checked and tested
under power at the factory. Rough handling in ship-
ment may have caused some misalignment during
transit. Following are several points which might be
checked to insure proper operation.
The table should be square with the blade when the
pointer indicates zero on the trunnion scale. If this is
not the case the tool will not produce accurate cuts
when set aeeording to thi,srcalc.-€orectionsmay
be
made by resetting the table square with the blade (use
an accurate square) and then readjusting the pointer
to the zero mark on the scale by loosening the screw
which holds the pointer to the tool.
cover
near the blade
tension adiusting
knob.
The
cover may be removed
for checking
tension or t€'
placing blades after removing
the three knobs directly
opposite
the cover retaining
nuts shown in 6gure l.
Tension adjustments
for the variouswidth
blades may
be made according to figure 2.
To remoye
or replace
a blade,
remove
the front
cover and the set screw in the table slot. Release the
tension until the blade may be slipped off easily. In-
stall the new blade with the teeth pointing
down and
away
from
the drive
pulley
and apply
the correct
tension.
Turn the pulley forward
by hand for at least
a dozen revolutions
or more.
Watch
caret,,.'^ry to see
that the blade
tracks in the same spot consistently.
If the blade tends to ride off the wheel,
two adjust-
ments are provided
to return the blade to its proper
track at the center of the drive wheel.
For minor adjustment
of blade tracking difficulties,
the blade alignment
adjusting
knob shown in figure
I may be turned slightly
in or out causing the rear
idler wheel to pivot and retrack the blade.
If this ad-
justment
is not sufficient the shaft on which the up.per
idler
wheel
is mounted
may be moved
toward
ot
away
from
the frame.
It is held
in place by the
square head screw in the casting over the shaft.
Be
certain that this screw is securely tightened after any
adjustment of the upper idler wheel.
Check the blade for correct tension before re-in-
stalling the cover.
Replace the set screw in the table
slot.
Blade
guide assemblies
are provided
both
above
and
below
the. table
to support
the blade
against
lateral and direct thrust.
The roller type guides be-
hind the blade should be set approximately
| /64 inch
from
the blade edge.
The blade should touch these
rollers only when cutting,
and not when the saw is
running
free.
The
lateral
guides should
be set as
close as possible to the blade without
touching. When
viewed from the side they should be in such a position
that if the blade is pushed against them, the flat sur'
face, and not the teeth will
ride the guides.
These
Iateral guides should
be checked often and refaced
and reset when necessary, to keep them close to the
blade.
When the saw is turned by hand, or when running
free under power, the blade should track smoothly on
all three wheels, and should touch none of the guides,
upper or lower.
The complete lower guide assembly is held in place
by
"
set screw through the frame casting and may be
adjusted
as a unit after loosening
this set scre!r'.
After
making
any adjustment
on the Band Saw,
check carefully
by turning
the mechanism
by hand
several times before applying power.
BIADE:
Following
are several common
causes of band saw
blade breakage.
Avoid
these situations by frequently
ADVANCE WASHER TO THIS POSITION TO
APPTY THE NECESSARY TENSION FOR 3/I
INCH WIDE BIADES.
WITH WASHER AT THIS POSIIION PROPER
TENSION HAS BEEN APPTIED FOR BOTH
3/r6 AND r/r INCH BLADES.
FIGURE 2
A stop screw with lock nut may be found projecting
from the lower table surface over the frame casting.
This
screw when
properly
set will
allow
accurate
return of the table to a true le.rcl position after it has
been tilted for an angular cut.
The proper tension for the 3/ | 6, | /4, or 378 inch
wide
blades recommended
is shown
on the blade
tension indicator.
This
indicator
is just inside the

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This manual is also suitable for:

103.24300