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J
Fig.
1
This sander
has been
designed
so that
it may
be
driven
from behind
or below
the belt
table,
The
direction
of rotation
of the sanding
belt must be from
the idler pulley
to the drive
pulley
across
the top of
the machine.
Bolt the sander
securely
to its stand.
This is import-
ant because
of the considerable
pull exerted
by the
motor
when
the sander
is operated
at
maximum
capacity.
Do not
run this
sander
until
oil
reservoirs
on
all
bearings
have
been
filled
with
a
good
grade
of
machine
oil similar
to S.A.E
No. 20.
To fill oil reser-
voirs
easily
and
completely,
use
an
oil
can
with
a
small
spout,
or a pressure
oil can
in order
to displace
air in reservoirs.
Always
keep
oil reservoirs
filled
with
oil.
This
tool
is equipped
with
new
type
bronze
bear-
ings
which
meter
filtered
oil
to
the
moving
parts.
These
bearings
have
invisible
pores
that
become
saturated
with
oil.
The
heat
generated
by the turning
oI the shaft
causes
the
lubricant
in the
reservoir
to
automatically
flow
through
these
bronze
bearings,
thus
lubricating
the moving
shaft.
When
the shaft
is
at rest,
the oil is absorbed
by the bearing.
Do not drill holes
through
the bearings
to feed oil
to the shaft, as it is not necessary.
CONTROLS
A micrometer
adjustment
of the work table
is ob-
tained
with the knurled
knob.
(A in Fig. 1). The wing
nuts (B) lock the work
table
support
arms
at the an-
gle chosen.
The screw
(C) in the work
table
support
is adjustable
and supports
the work table when
set at
45 °. The bolts (D) lock the belt table
at any angle
up
to 90 ° .
After setting
the fence square
-with the belt
table clamp
with the bolt (E)
The knurled
lock stud
assembly
(F) holds the tension
which
is set with the
lever on the opposite
side. The knobs
(G) adjust
the
tension
independently
on [he bearings
on either
side
of the idler pulley.
The bolts
(H) lock the tensioning
screws
when
the belt has been
made
to track
pro-
perly. The screws
(J) are adjustable
to keep the idler
pulley shaft parallel
with the drive shaft.
ADJUSTMENTS
Belt Tension
When
replacing
the sanding
belt
loosen
the lock
stud (E in Fig. 2) and
move
the tensioner
lever
to
position
(A).
This will pull the idler pulley
in to posi-
tion (B).
Slip on the belt and move lever to position
(C).
This will force idler
pulley
to position
(D) thus
tightening
the belt.
The
belt
should
be set at just
enough
tension
to give the belt the slack shown in the
lower half of Fig. 2.
CAUTION:
DO
NOT
RUN
THE
SANDER
WITH
TIGHT
SANDING
BELTS.
If moving
the lever
does
not
give
enough
travel
on
the idler
pulley,
check
the set screw
in the idler
pulley
bracket
beneath
the
belt
table.
Tighten
the
square
head
set
screw
on the
tenmoner
rack
with
only
_,"
of the rack
extending
out
of the casting.
Any additional
tension
changes
required
can
be
obtained
by moving
the adjusting
knobs
(G in Fig. 1)
the same
distance
on both sides.
Adjustment
of Belt
After the belt has been given the proper
amount
of
tension,
start the sander
with the motor. The belt must
track in the center
of-both
the idler and drive pulleys_
If belt tends to creep
to either
side
loosen
the
lock
screws
(H in Fig. 1) and tighten
the knob (G) on the
side toward
which
the belt
is moving.
When
belt
tracks
properly
tighten
Both bolts (H).
Belt Table
The belt table
may be varied
from its normal
hori-
zontal position
to a vertical
position
by loosening
the
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