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control, are less
likely
to make errors, and will
get
the most efficient work out of the
accessory.
For best control in close work, grip the
Rotary Tool like a pencil between your thumb
and forefinger.
The
pencil grip we described
is one
way to
hold the Rotary
Tool. A second way
is
to grip
the
tool much as you would the
handgrip
on a
bicycle,
with your hand wrapped around
the
housing
and the chuc
k
extending just beyond
your thumb and
forefinger.
This grip
must
be
used for
cutoff wheels and saws for
maximum
control and
is
often used with
polishing,
brushing, and grinding accessories.
This is the "handgrip" method of holding
the tool used for operations such as wire
brushing.
f
1
\hf.i.mi~tij
WHENEVER YOU HOLD THE
-
lA' ...... _
TOOL, BE CAREFUL NOT
TO COVER THE AIR VENTS WITH YOUR
HAND. THIS BLOCKS THE AIR FLOW AND
CAUSES THE MOTOR TO OVERHEAT.
f1\fQ.i·i@[ij
NEVER ATTEMPT TO HOLD
--1--' ...... _
THEWORKWITHONEHAND
WHILE USING EITHER OF THESE ACCES-
SORIES. WHEN USING THE SAW WHEEL
OR CUTOFF WHEELS ALWAYS HAVE THE
WORK SECURELY CLAMPED.
The reason is that these wheels will grab if
they become slightly angled in the groove,
and can kickback causing loss of control
resulting in serious injury. Your second
hand
should be used to steady
and
guide
the
hand
holding the tool. When
a cutoff
wheel
grabs,
the
wheel
itself usually
breaks.
When the
steel
saw
wheel
grabs, it may jump
from
the
groove and you could lose control of the too
l.
Operating
Speeds &
Accessories
There are two basic types of Rotary Tools:
Sin
gle speed and Variab le speed.
On
the
single speed model (572.61000), there
is
an
ON
-
OFF
switch. When the switch is on, the
tool runs at 30,000
R.P.M
.
On the
variable
speed model (572.61002), there is
a
small
numbered
dial which you can
turn
to select
the operating
speed
needed.
You can refer
to
the dial setting
chart to determine approxi-
mate
revolutions
per minute for
each
setting.
If
you
have
the single speed
model,
you will
be able
to
use
many
accessories to do a wide
assortment of jobs.
For the
majority of jobs
top speed should be used.
Needs for slower speeds:
To
achieve the best
results
when working
with
different
materials, the speed of your
Rotary Tool
should be
regulated.
Ultimately,
the best way to determine
the
correct speed for work on any
material is
to
practice for a
few
minutes on a
piece of
scrap,
even after referring to
the chart.
You
can
quickly
learn
that a slower
or faster
speed
is
more effective just by observing what
hap-
pens as you make a pass
or
two at different
speeds. When working with plastic, for exam-
ple,
start at a slow
rate
and
increase
the
speed until you observe
that the plastic
is
melting at
the
po
int of
contact.
Then back
the
speed off
slightly to
get
the optimum
wo rking
speed.
Some
rules
of thumb
in
regard to
speed:
1.
Plastics and materials
that melt
at
low
temperatures should
be cut
at low speeds.
Polishing, buffing and cleaning with a
wire
wheel
should
be
done
at speeds
below
15,000 RPM
to
prevent damage
to the
wheel.
For the single-speed model
(572.61000) only 2.
a
full wave
output
speed
control should be
used
.
Sears
Variable Speed Rotary Tool
(Model 572.61002)
has
an
integral
speed
control. THEREFORE, AN EXTERNAL SPEED
CONTROL SHOULD NEVER BE USED.
3. Soft wood should be cut
at high
speeds.
Certain materials
(some plastics, for example)
require a relatively slow speed because at
high speeds the friction
of
the tool
generates
heat and causes
the
plastic to
melt.
4.
Iron or
steel
shou ld
be
cut at
top speed if
using a
tungsten
carbide
accessory,
but
at
slower
speeds if using high speed steel
cutters.
If
a
high
speed
steel
cutter starts to
chatter -
this normally means it is running
too slow.
Slow
speeds
{15,000
R.P.M.
or
less)
usually
are best
for
polishing operations employing
5.
the felt polishing
accessories. They may also
Aluminum, copper alloys,
lead
al
loys,
zinc
alloys,
and tin may
be
cut at any
speed,
depending on
the type of cutting
being
done.
Use paraffin or other
suitable
lubri-
cant on the
cutter to prevent the
cut
material from adhering to
the cutter
teeth.
be best
for
working on
delicate
projects such
as "eggery" work, delicate wood carvings,
and
fragile model
parts. You should always
do polishing with wire brush accessories at
slower speeds, and never higher than 15,000
R.P.M.
Higher speeds
are better for carving, cutting,
routing,
shaping,
cutting
dadoes
or rabbets
in
wood
.
Hardwoods, metals, and glass require high
speed operation
,
and drilling should also be
done at
high
speeds.
Increasing
the pressure on the tool is not
the
answer when it is
not
cutting as you think
it
should.
Perhaps
you should
be using a dif-
ferent
cutter, and
perhaps
an adjustment
in
speed would solve the problem. But leaning
on the tool
seldom
helps.
The speed of variable speed model Rotary To help you do more with your single speed
Tool is controlled by setting this dial on the Rotary Tool, dial the speed you need with
housing.
this Sears Table Top Speed
Control.
Dial Settings for Approximate Revolutions
Per Minute, Craftsman Variable Speed
Rotary Tool (No. 572.61002).
Dial Setting
1
2
3
4
5
6
7
·Motor Speed
4,000 RPM
5,000
RPM
6,500 RPM
8,000
RPM
11,000 RPM
16,500
RPM
25,000
RPM
(Note:
You can
dial
intermediate settings.
For
example, a dial
setting
of
1-112
would pro-
duce a motor
speed of approximately 4,500
RPM.)
Dial settings for approximate revolutions per
minute, using the Sears Model 572.25144
Manually Operated Speed Control with the
single speed Rotary Tool No. 572.61000.
Dial Selling
1
2
3
4
5
Motor Speed
500 RPM
4,000
RPM
12,000 RPM
22,000
RPM
28,000
RPM
(Note: You can dial intermediate
settings.
For
example,
a
dial setting of 2-112 would pro-
duce a
motor
speed of approximately 8,000
RPM)
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