Dremel 750, 770, 754 User Manual
DM 2610925743 02-05 2/7/05 9:33 AM Page 1
Cordless Rotary Tool
Owner’s Manual Models 750, 754 & 770
Safety
•
• Assembly
Operation
•
Accessory Information
•
Warranty
•
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• Registration Form
• Service Parts
P.O. Box 1468
Racine, Wisconsin 53401
1-800-437-3635
http://www.dremel.com
2610925743 02/05 Printed in Mexico
DM 2610925743 02-05 2/7/05 9:33 AM Page 2
General Safety Rules
WARNING
!
below refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.
Read all instructions. Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury.
The term “power tool” in all of the warnings listed
SAVE THESE INSTRUCTIONS
Work area safety
Keep work area clean and well lit. Cluttered or dark
areas invite accidents.
Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases or dust. Power tools create sparks which
may ignite the dust or fumes.
Keep children and bystanders away while operating a
power tool. Distractions can cause you to lose control.
Electrical safety
Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs
with earthed (grounded) power tools. Unmodified
plugs and matching outlets will reduce risk of electric
shock.
Avoid body contact with earthed or grounded surfaces such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your
body is earthed or grounded.
Do not expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of
electric shock.
Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the power tool. Keep cord
away from heat, oil, sharp edges or moving parts.
Damaged or entangled cords increase the risk of electric shock.
When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suit-
able for outdoor use reduces the risk of electric shock.
Do not use AC only rated tools with a DC power supply. While the tool may appear to work, the electrical
components of the AC rated tool are likely to fail and
create a hazard to the operator.
If operating the power tool in damp locations is
unavoidable a Ground Fault Circuit Interrupter (GFCI)
must be used to supply the power to your tool. GFCI
and personal protection devices like electrician’s rubber gloves and footwear will further enhance your personal safety.
Personal safety
Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use
a power tool while you are tired or under the influence of drugs, alcohol or medication. A moment of
inattention while operating power tools may result in
serious personal injury.
Use safety equipment. Always wear eye protection.
Safety equipment such as dust mask, non-skid safety
shoes, hard hat, or hearing protection used for appropriate conditions will reduce personal injuries.
Avoid accidental starting. Ensure the switch is in the
off-position before plugging in. Carrying power tools
with your finger on the switch or plugging in power
tools that have the switch on invites accidents.
Remove any adjusting key or wrench before turning
the power tool on. A wrench or a key left attached to a
rotating part of the power tool may result in personal
injury.
Do not overreach. Keep proper footing and balance at
all times. This enables better control of the power tool
in unexpected situations.
Dress properly. Do not wear loose clothing or jewelry. Keep your hair, clothing and gloves away from
moving parts.
be caught in moving parts.
If devices are provided for the connection of dust
extraction and collection facilities, ensure these are
Page 2
Loose clothes, jewelry or long hair can
DM 2610925743 02-05 2/7/05 9:33 AM Page 3
connected and properly used. Use of these devices
can reduce dust-related hazards.
Keep handles dry, clean and free from oil and
grease. Slippery hands cannot safely control the
power tool.
Power tool use and care
Do not force the power tool. Use the correct power
tool for your application. The correct power tool will
do the job better and safer at the rate for which it was
designed.
Do not use the power tool if the switch does not turn
it on and off. Any power tool that cannot be controlled
with the switch is dangerous and must be repaired.
Disconnect the plug from the power source and/or the
battery pack from the power tool before making any
adjustments, changing accessories, or storing power
tools. Such preventive safety measures reduce the risk
of starting the power tool accidentally.
Store idle power tools out of the reach of children and
do not allow persons unfamiliar with the power tool or
these instructions to operate the power tool. Power
tools are dangerous in the hands of untrained users.
Maintain power tools. Check for misalignment or
binding of moving parts, breakage of parts and any
other condition that may affect the power tools operation. If damaged, have the power tool repaired
before use. Many accidents are caused by poorly
maintained power tools.
Keep cutting tools sharp and clean. Properly main-
tained cutting tools with sharp cutting edges are less
likely to bind and are easier to control.
Use the power tool, accessories and tool bits etc., in
accordance with these instructions and in the manner
intended for the particular type of power tool, taking
into account the working conditions and the work to
be performed. Use of the power tool for operations dif-
ferent from those intended could result in a hazardous
situation.
Use clamps or other practical way to secure and support the workpiece to a stable platform. Holding the
work by hand or against your body is unstable and may
lead to loss of control.
Battery tool use and care
Recharge only with the charger specified by the manufacturer. A charger that is suitable for one type of bat-
tery pack may create a risk of fire when used with
another battery pack.
Use battery tools only with specifically designated
battery packs. Use of any other battery packs may cre-
ate a risk of injury and fire.
When battery pack is not in use, keep it away from
other metal objects like paper clips, coins, keys,
nails, screws, or other small metal objects that can
make a connection from one terminal to another.
Shorting the battery terminals together may cause
burns or a fire.
Under abusive conditions, liquid may be ejected
from the battery, avoid contact. If contact accidentally occurs, flush with water. If liquid contacts eyes,
additionally seek medical help. Liquid ejected from
the battery may cause irritation or burns.
Ensure the switch is in the off position before inserting battery pack. Inserting the battery pack into power
tools that have the switch on invites accidents.
Service
Have your power tool serviced by a qualified repair
person using only identical replacement parts. This
will ensure that the safety of the power tool is maintained.
Develop a periodic maintenance schedule for your
tool. When cleaning a tool be careful not to disassemble any portion of the tool since internal wires
may be misplaced or pinched or safety guard return
springs may be improperly mounted. Certain cleaning
agents such as gasoline, carbon tetrachloride, ammonia, etc. may damage plastic parts.
SAVE THESE INSTRUCTIONS
Page 3
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Safety Rules for Cordless Rotary Tools
Hold tool by insulated gripping surfaces when performing an operation where the cutting tool may
contact hidden wiring. Contact with a "live" wire will
make exposed metal parts of the tool "live" and shock
the operator.
Use clamps or other practical way to secure and support the workpiece to a stable platform. Holding the
work by hand or against your body is unstable and may
lead to loss of control.
Accessories must be rated for at least the speed
recommended on the tool warning label. Wheels
and other accessories running over rated speed can
fly apart and cause injury.
If cutting into existing walls or other blind areas
where electrical wiring may exist is unavoidable,
disconnect all fuses or circuit breakers feeding this
worksite.
Before changing accessories remove battery pack.
Accidental starting may occur because battery tools
with a battery inserted are in the operative condition.
Be aware of the switch location, when placing the
tool down or when picking the tool up. You may acci-
dentally activate the switch.
Always hold the tool with two hands during astartup.
The reaction torque of the motor can cause the tool to
twist.
Always wear safety goggles and dust mask. Use
only in well ventilated area. Using personal safety
devices and working in safe environment reduces risk
of injury.
After changing the bits or making any adjustments,
make sure the collet nut and any other adjustment
devices are securely tightened. Loose adjustment
device can unexpectedly shift, causing loss of control,
loose rotating components will be violently thrown.
Do not reach in the area of the spinning bit. The
proximity of the spinning bit to your hand may not
always be obvious.
Allow brushes to run at operating speed for at least
one minute before using wheel. During this time no
one is to stand in front or in line with the brush.
Loose bristles or wires will be discharged during the
run-in time.
Wire and bristle brushes must never be operated at
speeds greater than 15,000/min. Direct the discharge of the spinning wire brush away from you.
Small particles and tiny wire fragments may be discharged at high velocity during the “cleaning” action
with these brushes and may become imbedded in
your skin. Bristles or wires will be discharged from
the brush at high speeds.
"Wear protective gloves and face shield with wire or
bristle brushes. Apply wire or bristle brushes lightly to the work as only the tips of the wire/bristles do
the work.
wire or bristle to become overstressed, resulting in a
wiping action and will cause the bristles/wire to be
discharged."
Carefully handle both the tool and individual grinding wheels to avoid chipping or cracking. Install a
new wheel if tool is dropped while grinding. Do not
use a wheel that may be damaged. Fragments from
a wheel that bursts during operation will fly away at
great velocity possibly striking you or bystanders.
Never use dull or damaged bits. Sharp bits must be
handled with care. Damaged bits can snap during
use. Dull bits require more force to push the tool,
possibly causing the bit to break.
Use clamps to support workpiece whenever practical. Never hold a small workpiece in one hand and
the tool in the other hand while in use. Allow for
sufficient space, at least 6", between your hand and
the spinning bit. Round material such as dowel rods,
pipes or tubing have a tendency to roll while being
cut, and may cause the bit to “bite” or jump toward
you. Clamping a small workpiece allows you to use
both hands to control the tool.
Page 4
“Heavy” pressure on bristles will cause the
DM 2610925743 02-05 2/7/05 9:33 AM Page 5
Inspect your workpiece before cutting. When cutting
irregularly shaped workpieces, plan your work so it
will not slip and pinch the bit and be torn from your
hand. For example, if carving wood, make sure there
are no nails or foreign objects in the workpiece. Nails
or foreign objects can cause the bit to jump.
Never start the tool when the bit is engaged in the
material. The bit cutting edge may grab the material
causing loss of control of the cutter.
Avoid bouncing and snagging the wheel, especially
when working corners, sharp edges etc. This can
cause loss of control and kick-back.
The direction of feed with the bit into the material
when carving, routing or cutting is very important.
Always feed the bit into the material in the same
direction as the cutting edge is exiting from the
material (which is the same direction as the chips
are thrown). Feeding the tool in the wrong direction,
causes the cutting edge of the bit to climb out of the
work and pull the tool in the direction of this feed.
If the workpiece or bit becomes jammed or bogged
down, turn the tool “OFF” by the switch. Wait for
all moving parts to stop and unplug the tool, then
work to free the jammed material. If the switch to
the tool is left “ON” the tool could restart unexpectedly causing serious personal injury.
Do not leave a running tool unattended, turn power
off. Only when tool comes to a complete stop it is
safe to put it down.
Do not grind or sand near flammable materials.
Sparks from the wheel could ignite these materials.
Do not touch the bit or collet after use. After use the
bit and collet are too hot to be touched by bare hands.
Regularly clean the tool's air vents by compressed
air. Excessive accumulation of powdered metal inside
the motor housing may cause electrical failures.
Do not allow familiarity gained from frequent use of
your rotary tool to become commonplace. Always
remember that a careless fraction of a second is sufficient to inflict severe injury.
Do not alter or misuse tool. Any alteration or modification is a misuse and may result in serious personal
injury.
This product is not intended for use as a dental drill,
in human or veterinary medical applications.
Serious injury may result.
When using the steel saws, cutoff wheels, high
speed cutters or tungsten carbide cutters, always
have the work securely clamped. Never attempt to
hold the work with one hand while using any of
these accessories. The reason is that these wheels
will grab if they become slightly canted 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, high speed cutters or tungsten
carbide cutter grab, it may jump from the groove and
you could lose control of the tool.
WARNING
!
drilling, and other construction activities contains
chemicals known to cause cancer, birth defects or
other reproductive harm. Some examples of these
chemicals are:
• Lead from lead-based paints,
• Crystalline silica from bricks and cement and other
masonry products, and
• Arsenic and chromium from chemicallytreated lumber.
Your risk from these exposures varies, depending on
how often you do this type of work. To reduce your
exposure to these chemicals: work in a well ventilated
area, and work with approved safety equipment, such
as those dust masks that are specially designed to filter out microscopic particles.
Some dust created by power
sanding, sawing, grinding,
Page 5
DM 2610925743 02-05 2/7/05 9:33 AM Page 6
Battery/Charger
Before using battery charger, read all instructions and
cautionary markings on (1) battery charger, (2) battery pack, and (3) product using battery.
Use only the charger which accompanied your
product or direct replacement as listed in the
catalog or this manual. Do not substitute any other
charger. Use only Dremel battery charger Nos. 756-01
& 758-01 with your product.
Do not disassemble charger or operate the charger if
it has received a sharp blow, been dropped or otherwise damaged in any way. Replace damaged cord or
plugs immediately. Incorrect reassembly or damage
may result in electric shock or fire.
Do not recharge battery in damp or wet environment.
Do not expose charger to rain or snow. If battery case
is cracked or otherwise damaged, do not insert into
charger. Battery short or fire may result.
Charge only Dremel Nos. 755-01 & 757-01 rechargeable batteries with the above listed chargers. Other
types of batteries may burst causing personal injury and
damage.
Charge battery pack in temperatures above +40
degrees F (4 degrees C) and below +105 degrees F
(41 degrees C). Store tool and battery pack in locations where temperatures will not exceed 120
degrees F (49 degrees C). This is important to prevent
serious damage to the battery cells.
Battery leakage may occur under extreme usage or
temperature conditions. Avoid contact with skin and
eyes. The battery liquid is caustic and could cause
chemical burns to tissues. If liquid comes in contact
with skin, wash quickly with soap and water, then with
lemon juice or vinegar. If the liquid contacts your eyes,
flush them with water for a minimum of 10 minutes and
seek medical attention.
Use of an attachment not recommended or sold by
Dremel may result in a risk of fire, electric shock or
injury to persons.
Page 6
Battery Care
!
WARNING
metal objects. For example, to protect terminals from
shorting DO NOT place batteries in a tool box or pocket
with nails, screws, keys, etc. Fire or injury may result.
DO NOT PUT BATTERIES INTO FIRE OR EXPOSE TO
HIGH HEAT. They may explode.
When batteries are not in tool or
charger, keep them away from
Battery Disposal
!
WARNING
ponent projecting from the battery terminals. Fire or
injury may result. Prior to disposal, protect exposed terminals with heavy insulating tape to prevent shorting.
Do not attempt to disassemble
the battery or remove any com-
Nickel-Cadmium Batteries
If equipped with a nickel-cadmium battery, the battery
must be collected, recycled or disposed of in an
environmentally sound manner.
“The EPA certified RBRC Battery
Recycling Seal on the nickel-cadmium (Ni-Cd) battery indicates S-B
Power Tool Company is voluntarily
participating in an industry pro-
batteries at the end of their useful life, when taken out
of service in the United States or Canada. The RBRC
program provides a convenient alterative to placing
used Ni-Cd batteries into the trash or the municipal
waste stream, which may be illegal in your area.
Please call 1-800-8-BATTERY for information on Ni-Cd
battery recycling and disposal bans/restrictions in
your area, or return your batteries to a
Skil/Bosch/Dremel Service Center for recycling. S-B
Power Tool Company’s involvement in this program is
part of our commitment to preserving our environment and conserving our natural resources.”
gram to collect and recycle these
Nickel-Metal Hydride Batteries
If equipped with a nickel-metal hydride battery, the battery can be disposed of in a municipal solid waste
stream.
0
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Symbols
IMPORTANT: Some of the following symbols may be used on your tool. Please study them and learn their
meaning. Proper interpretation of these symbols will allow you to operate the tool better and safer.
Symbol Name Designation/Explanation
V Volts Voltage (potential)
A Amperes Current
Hz Hertz Frequency (cycles per second)
W Watt Power
kg Kilograms Weight
min Minutes Time
s Seconds Time
Diameter Size of drill bits, grinding wheels, etc.
n
0
.../min Revolutions or reciprocation per minute Revolutions, strokes, surface speed,
0 Off position Zero speed, zero torque...
1, 2, 3, ... Selector settings Speed, torque or position settings.
I, II, III, Higher number means greater speed
No load speed Rotational speed, at no load
orbits etc. per minute
Infinitely variable selector with off Speed is increasing from 0 setting
Arrow Action in the direction of arrow
Alternating current Type or a characteristic of current
Direct current Type or a characteristic of current
Alternating or direct current Type or a characteristic of current
Class II construction Designates Double Insulated Construction tools.
Earthing terminal Grounding terminal
Warning symbol Alerts user to warning messages
Ni-Cad RBRC seal Designates Ni-Cad battery recycling program
Page 7
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Symbols
IMPORTANT: Some of the following symbols may be used on your tool. Please study them and learn their
meaning. Proper interpretation of these symbols will allow you to operate the tool better and safer.
This symbol designates
that this tool is listed by
Underwriters Laboratories.
This symbol designates that
this tool is listed by the
Canadian Standards
Association.
This symbol designates that this
tool is listed to Canadian
Standards by Underwriters
Laboratories.
This symbol designates that this
tool is listed by Underwriters
Laboratories, and listed to
Canadian Standards by
Underwriters Laboratories.
This symbol
designates that
this tool
complies
to NOM
Mexican
Standards.
Page 8
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Functional Description & Specifications
WARNING
!
Disconnect battery pack from tool or place the switch in the locked or off position before
making any assembly, adjustments or changing accessories. Such preventive safety
measures reduce the risk of starting the tool accidentally.
Cordless Rotary Tool
COLLET NUT
Rotary Tools
Model number 750 754 770
Voltage rating 4.8 V 4.8 V 7.2 V
No load speed n
Collet Capacities 1/32”, 1/16”, 3/32”, 1/8”
BATTERY
PACK
SWITCH
6,500-13,000/min n
o
RELEASE TAB
5,000-10,000/min n
o
Chargers
Model number 756-01 758-01
Voltage rating 120 V 60 Hz
Amperage rating 200 mA 200 mA
Charge time 3 Hr. 3 Hr.
10,000-20,000/min
o
BATTERY
PACK
CHARGER
RELEASE TAB
Page 9
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Assembly
!
WARNING
CHANGING ACCESSORIES, CHANGING COLLETS OR
SERVICING YOUR CORDLESS ROTARY TOOL.
SHAFT
LOCK
BUTTON
TO LOOSEN
(1/8" Collet is included with your tool)
COLLET NUT— To loosen, first press shaft lock button
and rotate the collet nut by hand until the lock engages
the shaft preventing further rotation.
CAUTION
!
With the shaft lock engaged, loosen the collet nut by
hand. Change accessories by inserting the new one
into the collet as far as possible to minimize runout and
unbalance. With the shaft lock engaged, finger tighten
the collet nut until the accessory shank is gripped by
the collet. Avoid excessive tightening of the collet
nut when there is no bit inserted.
COLLETS — Four different size collets (see illus-
tration), to accommodate different shank sizes, are
available for your Cordless Rotary Tool. To install a different collet, remove the collet nut and remove the old
collet. Insert the unslotted end of the collet in the hole
in the end of the tool shaft. Replace collet nut on the
shaft. Always use the collet which matches the shank
size of the accessory you plan to use. Never force a
larger diameter shank into a collet.
ALWAYS BE SURE THE TOOL IS IN
THE “0” POSITION BEFORE
COLLET
NUT
TO TIGHTEN
COLLET
Do not engage lock while the Tool
is running.
COLLET IDENTIFICATION CHART — Collet sizes can
be identified by the rings on the back end of collet.
1/32" Collet has one (1) ring.
1/16" Collet has two (2) rings.
3/32" Collet has three (3) rings.
1/8" Collet has no rings.
480 1/8"
COLLET
COLLET
NUT
BALANCING ACCESSORIES — For precision work, it is
important that all accessories be in good balance
(much the same as the tires on your automobile). To
true up or balance an accessory, slightly loosen collet
nut and give the accessory or collet a 1/4 turn. Retighten collet nut and run the Tool. You should be able
to tell by the sound and feel if your accessory is running in balance. Continue adjusting in this fashion until
best balance is achieved. To maintain balance on abrasive wheel points, before each use, with the wheel point
secured in the collet, turn on the Cordless Rotary Tool
and run the 415 Dressing Stone lightly against the
revolving wheel point. This removes high spots and
trues up the wheel point for good balance.
Remember, your new Dremel Cordless Rotary Tool is
the finest power tool of its kind. But its performance
is only as good as the accessories with which it is
used. We recommend only Dremel accessories be
used. Use of any other accessories may create a hazard. We hope you’ll enjoy many years of trouble free
pleasure from your Dremel Cordless Rotary Tool.
Page 10
481 3/32"
COLLET
482 1/16"
COLLET
IDENTIFICATION
RINGS
483 1/32"
COLLET
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Operation Instructions
Introduction
The Cordless Rotary Tool is a handful of high-speed
power. It serves as a carver, a grinder, polisher, sander,
cutter, power brush, drill and more.
Your Cordless Rotary Tool has a small, powerful electric
motor, is comfortable in the hand, and is made to accept
a large variety of accessories including abrasive wheels,
drill bits, wire brushes, polishers, engraving cutters,
router bits, and cutting wheels. Accessories come in a
variety of shapes and permit you to do a number of
different jobs. As you become familiar with the range of
accessories and their uses, you will learn just how
versatile your Cordless Rotary Tool is. You’ll see dozens
of uses you hadn’t thought of before now.
The real secret of the Cordless Rotary Tool is its speed.
To understand the advantages of its high speed, you
have to know that the standard portable electric drill
Read the next sections carefully. They will help you use
your Cordless Rotary Tool correctly and help you select
the correct accessory for your job.
Charging the Tool
The Cordless Rotary Tool is not fully charged. The tool
is equipped with a removable battery pack. Be sure to
charge pack prior to initial use. For best results on first
charge, charge pack overnight.
To charge the tool:
1. Put the switch in the “OFF” position.
2. Squeeze release tabs on both sides of battery pack,
and remove pack from back of tool as shown on page 9.
3. Align exterior shape of battery pack with exterior
shape of charger, squeeze release tabs, insert battery
pack into charger as shown and release pressure on
tabs so it locks in place.
4. Plug charger into the power source. The green L.E.D.
light indicates connection has been made and the
battery pack is charging. The LED light will remain lit
Page 11
runs at speeds up to 2,800 revolutions per minute. The
typical electric drill is a low-speed, high torque tool; the
Cordless Rotary Tool is just the opposite — a highspeed, low torque tool. The chief difference to the user
is that in the high speed tools, the speed combined with
the accessory mounted in the collet does the work. You
don’t apply pressure to the tool, but simply hold and
guide it. In the low speed tools, you not only guide the
tool, but also apply pressure to it, as you do, for example,
when drilling a hole.
It is this high speed, along with its compact size and
wide variety of special accessories, that makes your
Cordless Rotary Tool different from other power tools.
The speed enables it to do jobs low speed tools cannot
do, such as cutting hardened steel, engraving glass, etc.
Getting the most out of your Cordless Rotary Tool is a
matter of learning how to let this speed work for you.
even after charging is complete. Under normal usage
the tool normally requires 3 hours charging time to
reach full capacity.
5. When charging is completed, squeeze release tabs on
battery pack and remove pack from charger.
6. Align exterior shape of battery pack with exterior
shape of the housing of tool as shown. Squeeze release
tabs, insert battery pack into back of tool, and release
pressure on tabs so it locks in place.
Important Charging Notes
If you anticipate long periods of non-use for your tool
it's best to unplug your charger and battery pack from
its power source. Unplugging the charger will extend
the life expectancy of the charger and battery pack.
The battery pack accepts only about 80% of its maximum charge capacity with its first charge; or, after prolonged storage it will also require additional time on the
first charge. However, after several charge and discharge cycles, the batteries should be up to full charge
capacity and delivering maximum performance.
WARNING
Wear Eye Protection
DM 2610925743 02-05 2/7/05 9:33 AM Page 12
Using the Cordless Rotary Tool
The first step in learning to use the Cordless Rotary Tool
is to get the “feel” of it. Hold it in your hand and feel its
weight and balance. Feel the taper of the housing. This
taper permits the tool to be grasped much like a pen or
pencil.
When you turn on the tool for the first time, hold it away
from your face. Accessories can be damaged during
handling, and can fly apart as they come up to speed.
This is not common, but it does happen.
Practice on scrap materials first to see how the Cordless
Rotary Tool cuts. Keep in mind that the work is done by
the speed of the tool and by the accessory in the collet.
You should not lean on or push the tool into the work.
Instead, lower the spinning accessory lightly to the
work and allow it to touch the point at which you want
cutting (or sanding or etching, etc.) to begin. Concentrate on guiding the tool over the work using very little pressure from your hand. Allow the accessory to do
the work.
Usually, it is best to make a series of passes with the
tool rather than attempt to do all the work in one pass.
To make a cut, for example, pass the tool back and forth
over the work, much as you would a small paint brush.
Cut a little material on each pass until you reach the
desired depth. For most work, the deft, gentle touch is
best. With it, you have the best 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 “handgrip” method of holding the tool is used for
operations such as grinding a flat surface or using
cutoff wheels.
Page 12
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Operating Speeds For Accessories
Set the speed indicator to fit the job to achieve the
best job results when working with different
materials.
To select the right speed for each job, use a practice
piece of material. Vary speed to find the best speed
for the accessory you are using and the job to be
done.
On the Model 750, there is a LO and HI switch. When
the switch indicator is in position 1 or LO, the tool runs
at about 6,500 RPM. When the switch indicator is in
position 2 or HI, the tool runs at about 13,000 RPM.
On Model 754, there is a LO and HI switch. When the
switch is in position 1 or LO, the tool runs at about
5,000 RPM. When the switch is in position 2 or HI, the
tool runs at about 10,000 RPM.
On the Model 770, there is a LO and HI switch. When
the switch indicator is in position 1 or LO, the tool runs
at about 10,000 RPM. When the switch indicator is in
position 2 or HI, the tool runs at about 20,000 RPM.
You can refer to the charts on pages 14 and 15 to
determine the proper speed, based on the material
being worked and the type of cutter or other accessory
being used. These charts enable you to select both the
correct accessory and the optimum speed at a glance.
Needs for Slower Speeds
Certain materials, however, (some plastics, for example) require a relatively slow speed because at high
speed the friction of the tool generates heat and causes the plastic to melt.
Most work is done at high speed on your Cordless
Rotary Tool. Lower speeds are needed only for certain
tasks.
The speed of Models 750, 754 & 770 is controlled by
setting this indicator on the housing.
Using the Cordless Rotary Tool Model 770 with Attachments
The Cordless Rotary Tool model 770 can be used with
some Dremel attachments that screw onto the nose of
the tool.
Model 770 can be used with the 568 Grout Removal
attachment, 675 Lawnmower and Garden Tool
Sharpener, and the 1453 Chainsaw Sharpener attachment.
Use of other Dremel attachments not listed is not recommended. Dremel attachments cannot be used with
the cordless tool model 750 and 754.
Page 13
DM 2610925743 02-05 2/7/05 9:33 AM Page 14
GLASS
2
2
CERAMIC
2
2
2
1
2
1
222
STONE
SHELL/
2
22222
ALUMINUM,
BRASS, ETC.
STEEL
11111
PLASTIC
HIGH SPEED CUTTERS
LAMINATES
Speed for plastic depends on thickness of material or amount of material to be removed.
HARD
22222
WOOD
2
2
2
1
1
SMALL ENGRAVING CUTTERS
RUBBER POLISHING POINT
2
2
2
CUTTING ACCESSORIES — SEE WARNING PAGE 4
222
222
222
2
1
DIAMOND WHEEL POINTS
2
2
2
2
1
2 1
Page 14
ALUMINUM OXIDE GRINDING STONES
2
2 2
SOFT
CATALOG
SPEED SETTINGS
WOOD
NUMBER
22222
100, 114, 115, 116, 117,
196, 197, 198, 199
118, 121, 124, 125, 131,
134, 141, 144, 178, 189,
190, 191, 192, 193, 194,
2
2
425, 427
110, 111, 112, 113
105, 106, 107, 108, 109,
409, 420, 426, 540
222
542
545
561
222
7134, 7144
7103, 7105, 7117,
7120, 7122, 7123,
2
2
541
8215
997, 8153, 8175, 8193,
903, 911, 921, 932, 941,
945, 952, 953, 954, 971,
DM 2610925743 02-05 2/7/05 9:33 AM Page 15
GLASS
CERAMIC
STONE
SHELL/
ALUMINUM,
BRASS, ETC.
STEEL
PLASTIC
LAMINATES
Speed for plastic depends on thickness of material or amount of material to be removed.
HARD
WOOD
SOFT
WOOD
2
2
2
1
2
2
2
1
TUNGSTEN CARBIDE CUTTERS
1-2
1-2
222
2
222
1
1-2
SANDING BANDS AND DISCS
SILICON CARBIDE GRINDING STONES
2
2
1-2
2
2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1
FLAPWHEELS
1
2
2
2
DRILL BIT
1
FINISHING ABRASIVE BUFFS
2
2
Page 15
For Use on Wall and Floor Grout
GROUT REMOVAL BITS
Use only Dremel Tested, High Performance Accessories.
NUMBER
CATALOG
SPEED SETTINGS
85622
9901, 9902,
9903, 9904,
83142, 83322, 83702,
84922, 85422, 85602,
9905, 9906, 9912
9909, 9910, 9911
411, 412, 413
430, 431, 438
439, 440, 444
407, 408, 432
511 22 2
150 22 1
569, 570
502, 503, 504, 505 2 2 22 1
DM 2610925743 02-05 2/7/05 9:34 AM Page 16
Maintenance
Service
WARNING
!
performed by unauthorized personnel may result in
misplacing of internal wires and components which
could cause serious hazard. We recommend that all
tool service be performed by a Dremel Service Facility.
SERVICEMEN: Disconnect tool and/or charger from
power source before servicing.
NO USER SERVICEABLE PARTS
INSIDE. Preventive maintenance
D.C. motors
The motor in your tool has been engineered for many
hours of dependable service. To maintain peak efficiency of the motor, we recommend it be examined every
six months. Only a genuine Dremel replacement motor
specially designed for your tool should be used.
Cleaning
WARNING
!
from the power supply before cleaning. The tool may
be cleaned most effectively with compressed dry air.
Always wear safety goggles when cleaning tools with
compressed air.
Ventilation openings and switch levers must be kept
clean and free of foreign matter. Do not attempt to clean
by inserting pointed objects through opening.
To avoid accidents, always disconnect the tool and/or charger
WARNING
!
Certain cleaning agents and solvents damage plastic parts. Some
of these are: gasoline, carbon tetrachloride, chlorinated
cleaning solvents, ammonia and household detergents
that contain ammonia.
Extension Cords
CAUTION
!
tors that is capable of carrying the current necessary
for your tool must be used. This will prevent excessive
voltage drop, loss of power or overheating. Grounded
tools must use 3-wire extension cords that have 3prong plugs and receptacles.
RECOMMENDED SIZES OF EXTENSION CORDS
120 VOLT ALTERNATING CURRENT TOOLS
ool’s
T
Ampere
Rating
3-6
6-8
8-10
10-12
12-16
NOTE: The smaller the gauge number, the heavier the
cord.
If an extension cord is necessary,
a cord with adequate size conduc-
Cord Size in A.W.G.
Cord Length in Feet Cord Length in Meters
25 50 100 150 15 30 60 120
18 16 16 14 .75 .75 1.5 2.5
18 16 14 12 .75 1.0 2.5 4.0
18 16 14 12 .75 1.0 2.5 4.0
16 16 14 12 1.0 2.5 4.0 —
14 12 — — — — — —
Wire Sizes in mm
2
Page 16
DM 2610925743 02-05 2/7/05 9:34 AM Page 17
Cordless Rotary Tool Accessories
WARNING
!
The number and variety of accessories for the Rotary
Tool are almost limitless. There is a category suited to
almost any job you might have to do — and a variety of
sizes and shapes within each category which enables
you to get the perfect accessory for every need.
Refer to the DREMEL ORDER FORM for the accessories available. These accessories may be found at
your local hardware, hobby or home center dealers.
Collets
If you expect to use a variety of accessories, we recommend that in the beginning you purchase a complete
set of four collets. Store these so that you will have the
proper size of collet for any accessory or drill bit you
want to use. Currently, the 1/8", 3/32", 1/32" and 1/16"
collets accommodate all of the available Dremel
accessories.
Mandrels
A mandrel is a shank with a threaded or screw head,
which are required when you use polishing accessories, cutting wheels, sanding discs, and polishing
points. The reason mandrels are used is that sanding
discs, cutting wheels and similar accessories must be
replaced frequently. The mandrel is a permanent
shank, allowing you to replace only the worn head
when necessary, thus saving the expense of replacing
the shaft each time.
Use only Dremel Tested, High Performance Accessories. Other accessories are not
designed for this tool and may lead to personal injury or property damage.
Threaded Tip Mandrel No. 424
This is a mandrel with a threaded tip which threads into
the polishing point accessory No. 427.
Tungsten Carbide Cutters
These are tough, long-lived cutters for use on hardened steel, fired ceramics and other very hard materials. They can be used for engraving on tools and
garden equipment.
Engraving Cutters
This group has a wide variety of sizes and shapes, and
are made for intricate work on ceramics (greenware),
wood carvings, jewelry and scrimshaw. They often are
used in making complicated printed circuit boards.
They should not be used on steel and other very hard
materials but are excellent on wood, plastic and soft
metals. Needs 3/32" collet.
Screw Mandrel No. 401
This is a screw mandrel used with the felt polishing tip
and felt polishing wheels.
Small Screw Mandrel No. 402
This is a mandrel with a small screw at its tip, and is
used with emery cutting wheels, sanding discs and
polishing wheels.
Structured Tooth
Tungsten Carbide Cutters
Fast cutting, needle-sharp teeth for greater material
removal with minimum loading. Use on fiberglass,
wood, plastic, epoxy and rubber.
Page 17
DM 2610925743 02-05 2/7/05 9:34 AM Page 18
No polishing compound is needed when using the
425 Polishing Wheel or 427 Polishing point.
Aluminum Oxide Grinding Stones (orange/brown)
Round, pointed, flat — you name the shape and there is
one available in this category. These are made of aluminum oxide and cover virtually every possible kind of
grinding application. Use them for sharpening lawn
mower blades, screwdriver tips, knives, scissors, chisels and other cutting tools. Use to remove flash from
metal castings, deburring any metal after cutting,
smoothing welded joints, grinding off rivets and removing rust. In machine shops, high speed drills and cutters
normally are ground with aluminum oxide wheels.
Aluminum Oxide Abrasive Wheels
Use to remove paint, deburr metal, polish stainless
steel and other metals. Available in fine and medium
grits.
Sanding Accessories
Sanding discs in fine, medium and coarse grades are
made to fit mandrel No. 402. They can be used for
Silicon Carbide Grinding Stones (green/gray)
Tougher than aluminum oxide points, these are made
especially for use on hard materials such as glass and
ceramics. Typical uses might be the removal of stilt
marks and excess glaze on ceramics and engraving on
glass.
nearly any small sanding job you might have, from
model making to fine furniture finishing. In addition,
there is the drum sander, a tiny drum which fits into the
Rotary Tool and makes it possible to shape wood,
smooth fiberglass, sand inside curves and other difficult places, and other sanding jobs. You replace the
sanding bands on the drum as they become worn and
lose their grit. Bands come in fine and coarse grades.
Diamond Wheel Points
Excellent for fine detail work on wood, jade, ceramic,
glass and other hard material. Bits are covered with
diamond particles. 3/32" shanks.
Polishing Accessories
These include an impregnated polishing point and an
impregnated polishing wheel for bringing metal surfaces to smooth finish; a felt polishing tip and felt
polishing wheel, and cloth polishing wheel, all used for
polishing plastics, metals, jewelry and small parts. Also
included in this group is a polishing compound (No.
421) for use with the felt and cloth polishers.
Polishing points make a very smooth surface, but a
high luster is obtained using felt or cloth wheels and
polishing compound.
Wire Brushes
Three different shapes of wire brushes are available.
For best results wire brushes should be used at
speeds not greater than 15,000 RPM. The three
shapes come in three different materials: stainless
steel, brass and carbon wire. The stainless steel perform well on pewter, aluminum, stainless steel, and
other metals, without leaving "after-rust". Brass brushes are non sparking, and softer than steel; making
them good for use on soft metal like gold, cooper and
brass. The carbon wire brushes are good for general
purpose cleaning.
Page 18
15°
DM 2610925743 02-05 2/7/05 9:34 AM Page 19
Cordless Rotary Tool Accessories (Cont.)
WARNING
!
Bristle Brushes
These are excellent cleaning tools on silverware, jewelry and antiques. The three shapes make it possible to
get into tight corners and other difficult places. Bristle
brushes can be used with polishing compound for
faster cleaning or polishing.
Brushing Pressure
1. Remember, the tips of a wire brush do the work.
Operate the brush with the lightest pressure so only
the tips of the wire come in contact with the work.
2. If heavier pressures are used, the wires will be
overstressed, resulting in a wiping action; and if this
is continued, the life of the brush will be shortened
due to wire fatigue.
3. Apply the brush to the work in such a way that as
much of the brush face as possible is in full contact
with the work. Applying the side or edge of the brush
to the work will result in wire breakage and shortened
brush life.
Use only Dremel Tested, High Performance Accessories. Other accessories are not
designed for this tool and may lead to personal injury or property damage.
Grinding Wheel
Use for deburring, removing rust, and general purpose
grinding. Use with Mandrel #402.
Cutting Wheels
These thin discs of emery or fiberglass are used for
slicing, cutting off and similar operations. Use them for
cutting off frozen bolt heads and nuts, or to reslot a
screw head which has become so damaged that the
screwdriver won’t work in it. Fine for cutting BX cable,
small rods, tubing, cable and cutting rectangular holes
in sheet metal.
CORRECT:
Wire tips doing the work.
High Speed Cutters
Made of high quality steel. All have 1/8" shanks. Can be
used for shaping, hollowing most metals, plastics and
woods.
Excessive pressure can cause wire breakage.
INCORRECT:
Drywall Cutting Bit
Gives you fast, clean cuts in drywall.
Spiral Cutting Bit
Cuts through all types of wood and wood composites.
Page 19
DM 2610925743 02-05 2/7/05 9:34 AM Page 20
Mandrel No. 401 is used with the felt polishing tip and
wheels. Thread the tip on to the screw carefully.
Mandrel No. 402 has a small screw at its tip, and is
used with emery cutting wheels and sanding discs.
The machine-screw threading on Mandrel No. 424
threads into polishing point No. 427.
The felt tip must thread down straight on the screw
Mandrel, and be turned all the way to the collar.
Higher speeds, usually maximum, are best for most
work, including cutting steel. Which is shown here.
This and other threaded mandrels must be screwed
firmly down to the collar before being used.
Page 20
DM 2610925743 02-05 2/7/05 9:34 AM Page 21
Dremel Limited Warranty
Your Dremel product is warranted against defective material or workmanship for a period of two years from date of
purchase. In the event of a failure of a product to conform to this written warranty, please take the following action:
1. DO NOT return your product to the place of purchase.
2. Carefully package the product by itself, with no other items, and return it, freight prepaid, along with:
A. A copy of your dated proof of purchase (please keep a copy for yourself).
B. A written statement about the nature of the problem.
C. Your name, address and phone number to:
UNITED STATES
Dremel Service Center Dremel Service Center
4915 Twenty-First Street OR 4631 E. Sunny Dunes
Racine, Wisconsin 53406 Palm Springs, CA 92264
CANADA OUTSIDE
Giles Tool Agency CONTINENTAL UNITED STATES
6520 Lawrence Av. East See your local distributor or write
Scarborough, Ont. to Dremel, 4915 Twenty-First St.
Canada M1C 4A7 Racine, Wisconsin 53406
1-888-285-3476
We recommend that the package be insured against loss or in transit damage for which we cannot be responsible.
This warranty applies only to the original registered purchaser. DAMAGE TO THE PRODUCT RESULTING FROM
TAMPERING, ACCIDENT, ABUSE, NEGLIGENCE, UNAUTHORIZED REPAIRS OR ALTERATIONS, UNAPPROVED
ATTACHMENTS OR OTHER CAUSES UNRELATED TO PROBLEMS WITH MATERIAL OR WORKMANSHIP ARE NOT
COVERED BY THIS WARRANTY.
No employee, agent, dealer or other person is authorized to give any warranties on behalf of Dremel. If Dremel
inspection shows that the problem was caused by problems with material or workmanship within the limitations of
the warranty, Dremel will repair or replace the product free of charge and return product prepaid. Repairs made necessary by normal wear or abuse, or repair for product outside the warranty period, if they can be made, will be
charged at regular factory prices.
DREMEL MAKES NO OTHER WARRANTY OF ANY KIND WHATEVER, EXPRESSED OR IMPLIED, AND ALL IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WHICH EXCEED THE ABOVE
MENTIONED OBLIGATION ARE HEREBY DISCLAIMED BY DREMEL AND EXCLUDED FROM THIS LIMITED WARRANTY.
This warranty gives you specific legal rights and you may also have other rights which vary from state to state. The
obligation of the warrantor is solely to repair or replace the product. The warrantor is not liable for any incidental or
consequential damages due to any such alleged defect. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitations or exclusion may not apply to you.
For prices and warranty fulfillment in the continental United States, contact your local Dremel distributor.
Page 21
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