Dremel 7700 User Manual
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Operating/Safety Instructions
Consignes de fonctionnement/sécurité
Instrucciones de funcionamiento y seguridad
1-800-4-DREMEL (1-800-437-3635) www.dremel.com
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& Service Locations
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P.O. Box 081126 Racine, WI 53408-1126
7700
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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 con-
trol.
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 sur-
faces 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.
If operating a power tool in a damp location is
unavoidable, use a Ground Fault Circuit Interrupter
(GFCI) protected supply. Use of an GFCI reduces the
risk of electric shock.
Read all safety warnings and all instructions. Failure to follow the warnings and instructions may result in electric shock, fire and/or serious injury.
SAVE ALL WARNINGS AND INSTRUCTIONS FOR FUTURE REFERENCE
The term “power tool” in the warnings refers to your mains-operated (corded) power tool or battery-operated
(cordless) power tool.
General Power Tool Safety Warnings
Safety Symbols
The definitions below describe the level of severity for each signal word.
Please read the manual and pay attention to these symbols.
!
This is the safety alert symbol. It is used to alert you to potential personal
injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.
DANGER indicates a hazardous situation which, if not avoided, will result in
death or serious injury.
WARNING indicates a hazardous situation which, if not avoided, could result
in death or serious injury.
CAUTION, used with the safety alert symbol, indicates a hazardous
situation which, if not avoided, will result in minor or moderate injury.
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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 personal protective equipment. Always wear eye
protection. Protective equipment such as dust mask,
non-skid safety shoes, hard hat, or hearing protection
used for appropriate conditions will reduce personal
injuries.
Prevent unintentional starting. Ensure the switch is
in the off-position before connecting to power source
and / or battery pack, picking up or carrying the tool.
Carrying power tools with your finger on the switch or
energizing 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. Loose clothes, jewelry or long hair can
be caught in moving parts.
If devices are provided for the connection of dust
extraction and collection facilities, ensure these are
connected and properly used. Use of dust collection
can reduce dust-related hazards.
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 tool’s 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 maintained 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, taking into
account the working conditions and the work to be
performed. Use of the power tool for operations differ-
ent from those intended could result in a hazardous situation.
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 power 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.
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.
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Safety Rules for Cordless Rotary Tools
Safety warnings common for grinding,
sanding, wire brushing, polishing, carving
or abrasive cutting-off operations:
This power tool is intended to function as a grinder,
sander, wire brush, polisher, carving or cut-off tool.
Read all safety warnings, instructions, illustrations
and specifications provided with this power tool.
Failure to follow all instructions listed below may result
in electric shock, fire and/or serious injury.
Do not use accessories which are not specifically
designed and recommended by the tool manufacturer. Just because the accessory can be attached to your
power tool, it does not assure safe operation.
The RATED SPEED of the accessory must be at least
equal to the operating speed setting marked on the
power tool. Accessories running faster than their
RATED SPEED can break and fly apart.
The outside diameter and the thickness of your accessory must be within the capacity rating of your power
tool. Incorrectly sized accessories cannot be adequately
guarded or controlled.
The arbor size of wheels, sanding drums or any other
accessory must properly fit the spindle or collet of the
power tool. Accessories that do not match the mount-
ing hardware of the power tool will run out of balance,
vibrate excessively and may cause loss of control.
Mandrel mounted wheels, sanding drums, cutters or
other accessories must be fully inserted into the collet
or chuck. If the mandrel is insufficiently held and/or the
overhang of the wheel is too long, the mounted wheel
may become loose and be ejected at high velocity.
Do not use a damaged accessory. Before each use
inspect the accessory such as abrasive wheels for
chips and cracks, sanding drum for cracks, tear or
excess wear, wire brush for loose or cracked wires. If
power tool or accessory is dropped, inspect for dam-
age or install an undamaged accessory. After inspecting and installing an accessory, position yourself and
bystanders away from the plane of the
rotating accessory and run the power tool at maximum
no-load speed for one minute. Damaged accessories
will normally break apart during this test time.
Wear personal protective equipment. Depending on
application, use face shield, safety goggles or safety
glasses. As appropriate, wear dust mask, hearing protectors, gloves and workshop apron capable of stopping small abrasive or workpiece fragments. The eye
protection must be capable of stopping flying debris
generated by various operations. The dust mask or res-
pirator must be capable of filtrating particles generated
by your operation. Prolonged exposure to high intensity
noise may cause hearing loss.
Keep bystanders a safe distance away from work area.
Anyone entering the work area must wear personal
protective equipment. Fragments of workpiece or of a
broken accessory may fly away and cause injury beyond
immediate area of operation.
Hold power tool by insulated gripping surfaces only,
when performing an operation where the cutting
accessory may contact hidden wiring. Cutting accesso-
ry contacting a “live” wire may make exposed metal
parts of the power tool “live” and could give the operator
an electric shock.
Always hold the tool firmly in your hand(s) during the
start-up. The reaction torque of the motor, as it acceler-
ates to full speed, can cause the tool to twist.
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. Clamping a small work-
piece allows you to use your hand(s) to control the tool.
Round material such as dowel rods, pipes or tubing have
a tendency to roll while being cut, and may cause the bit
to bind or jump toward you.
Position the cord clear of the spinning accessory. If
you lose control, the cord may be cut or snagged and
your hand or arm may be pulled into the spinning accessory.
Never lay the power tool down until the accessory has
come to a complete stop. The spinning accessory may
grab the surface and pull the power tool out of your control.
After changing the bits or making any adjustments,
make sure the collet nut, chuck or any other adjustment devices are securely tightened. Loose adjust-
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ment devices can unexpectedly shift, causing loss of
control, loose rotating components will be violently
thrown.
Do not run the power tool while carrying it at your side.
Accidental contact with the spinning accessory could
snag your clothing, pulling the accessory into your body.
Regularly clean the power tool’s air vents. The motor’s
fan will draw the dust inside the housing and excessive
accumulation of powdered metal may cause electrical
hazards.
Do not operate the power tool near flammable materials. Sparks could ignite these materials.
Do not use accessories that require liquid coolants.
Using water or other liquid coolants may result in electrocution or shock.
Use only in well-ventilated area. Working in a safe
environment reduces risk of injury.
Allow for sufficient space, at least 6”, between your
hand and the spinning bit. Do not reach in the area of
the spinning bit. The proximity of the spinning bit to
your hand may not always be obvious.
Do not touch the bit or collet after use. After use the bit
and collet are too hot to be touched by bare hands.
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.
Kickback and Related Warnings
Kickback is a sudden reaction to a pinched or snagged
rotating wheel, backing pad, brush or any other accessory. Pinching or snagging causes rapid stalling of the
rotating accessory which in turn causes the uncontrolled
power tool to be forced in the direction opposite of the
accessory’s rotation.
For example, if an abrasive wheel is snagged or pinched
by the workpiece, the edge of the wheel that is entering
into the pinch point can dig into the surface of the material causing the wheel to climb out or kickout. The wheel
may either jump toward or away from the operator,
depending on direction of the wheel’s movement at the
point of pinching. Abrasive wheels may also break under
these conditions.
Kickback is the result of power tool misuse and/or incorrect operating procedures or conditions and can be
avoided by taking proper precautions as given below.
Maintain a firm grip on the power tool and position
your body and arm to allow you to resist kickback
forces. The operator can control kickback forces, if
proper precautions are taken.
Use special care when working corners, sharp edges
etc. Avoid bouncing and snagging the accessory.
Corners, sharp edges or bouncing have a tendency to
snag the rotating accessory and cause loss of control or
kickback.
Do not attach a toothed saw blade. Such blades create
frequent kickback and loss of control.
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.
When using rotary files, cut-off wheels, high-speed
cutters or tungsten carbide cutters, always have the
work securely clamped. These wheels will grab if they
become slightly canted in the groove, and can kickback.
When a cut-off wheel grabs, the wheel itself usually
breaks. When a rotary file, high-speed cutter or tungsten
carbide cutter grabs, it may jump from the groove and
you could lose control of the tool.
Safety warnings specific for grinding and abra-
sive cutting-off operations:
Use only wheel types that are recommended for your
power tool and only for recommended applications.
For example: do not grind with the side of a cut-off
wheel. Abrasive cut-off wheels are intended for periph-
eral grinding, side forces applied to these wheels may
cause them to shatter.
For threaded abrasive cones and plugs use only
undamaged wheel mandrels with an unrelieved shoulder flange that are of correct size and length. Proper
mandrels will reduce the possibility of breakage.
Do not jam a cut-off wheel or apply excessive pressure. Do not attempt to make an excessive depth of
cut. Overstressing the wheel increases the loading and
susceptibility to twisting or snagging of the wheel in the
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GFCI and personal protection devices like electrician’s
rubber gloves and footwear will further enhance your
personal safety.
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.
Keep handles dry, clean and free from oil and grease.
Slippery hands cannot safely control the power tool.
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.
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.
Some dust created by power
sanding, sawing, grinding,
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 chemically-treated lum-
ber.
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.
Additional Safety Warnings
cut and the possibility of kickback or wheel breakage.
Do not position your hand in line with and behind the
rotating wheel. When the wheel, at the point of opera-
tion, is moving away from your hand, the possible kickback may propel the spinning wheel and the power tool
directly at you.
When wheel is pinched, snagged or when interrupting
a cut for any reason, switch off the power tool and hold
the power tool motionless until the wheel comes to a
complete stop. Never attempt to remove the cut-off
wheel from the cut while the wheel is in motion otherwise kickback may occur. Investigate and take correc-
tive action to eliminate the cause of wheel pinching or
snagging.
Do not restart the cutting operation in the workpiece.
Let the wheel reach full speed and carefully re-enter
the cut. The wheel may bind, walk up or kickback if the
power tool is restarted in the workpiece.
Support panels or any oversized workpiece to minimize the risk of wheel pinching and kickback. Large
workpieces tend to sag under their own weight.
Supports must be placed under the workpiece near the
line of cut and near the edge of the workpiece on both
sides of the wheel.
Use extra caution when making a pocket cut into
existing walls or other blind areas. The protruding
wheel may cut gas or water pipes, electrical wiring or
objects that can cause kickback.
Safety warnings specific for wire brushing
operations:
Be aware that wire bristles are thrown by the brush
even during ordinary operation. Do not overstress the
wires by applying excessive load to the brush. The
wire bristles can easily penetrate light clothing and/or
skin.
Allow brushes to run at operating speed for at least
one minute before using them. During this time no one
is to stand in front or in line with the brush. Loose bris-
tles or wires will be discharged during the run-in time.
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 use of these
brushes and may become imbedded in your skin.
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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 approved chargers with your product. See
Functional Description and Specifications.
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 approved rechargeable batteries. See Functional Description and Specifications.
Other types of batteries may burst causing personal
injury and damage.
Charge battery pack in temperatures above +32
degrees F (0 degrees C) and below +113 degrees F
(45 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.
Place charger on flat non-flammable surfaces and
away from flammable materials when re-charging
battery pack. The charger and battery pack heat during
charging. Carpeting and other heat insulating surfaces
block proper air circulation which may cause overheating of the charger and battery pack. If smoke or melting
of the case are observed unplug the charger immediately and do not use the battery pack or charger.
Use of an attachment not recommended or sold by
Dremel may result in a risk of fire, electric shock or
injury to persons.
Battery Care
When batteries are not in tool
or charger, keep them away
from 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.
Battery Disposal
Do not attempt to disassemble
the battery or remove any
com ponent projecting from the battery terminals. Fire
or injury may result. Prior to disposal, protect exposed
terminals with heavy insulating tape to prevent shorting.
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Nickel-Cadmium Batteries
If equipped with a nickel-cadmium battery, the battery must be collected, recycled or disposed of in an
environ mentally sound manner.
“The EPA certified RBRC Battery
Recycling Seal on the nickel-cadmium (Ni-Cd) battery indicates
Robert Bosch Tool Corporation is
voluntarily participating in an
industry program to collect and
recycle these 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 munici pal waste stream, which
may be illegal in your area.
Please call 1-800-8-BATTERY for information on NiCd battery recycling and disposal bans/restrictions
in your area, or return your batteries to a
Bosch/Dremel Service Center for recycling. Robert
Bosch Tool Corporation’s involvement in this program is part of our commitment to preserving our
environment and conserving our natural
resources.”
The manufacturer is not responsible for radio interference caused by unauthorized modifications to this
equipment. Such modifications could void the user’s
authority to operate the equipment.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
1) This device may not cause harmful interference, and
2) This device must accept any interference received,
including interference that may cause undesired
operation.
NOTE! This equipment has been tested and found to
comply with the limits for a Class B digital devices, pursuant to Part 15 of the FCC rules. These limits are
designed to provide reasonable protection against
harmful interference in a residential installation. This
equipment generates uses and can radiate radio frequency energy and, if not installed and used in accor-
dance with the instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by
one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment
and receiver.
• Connect the equipment into an outlet on a circuit
different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV
technician for help.
FCC Caution:
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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.
Symbols
Symbol
Designation / Explanation
V
Volts (voltage)
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
No load speed (rotational speed at no load)
n
Rated speed (maximum attainable speed)
.../min
Revolutions or reciprocation per minute (revolutions, strokes, surface speed, orbits etc.
per minute)
0
Off position (zero speed, zero torque...)
1, 2, 3, ...
I, II, III,
Selector settings (speed, torque or position settings. Higher number means greater speed)
0
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)
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Symbol Designation / Explanation
Designates Ni-Cad battery recycling program
Alerts user to read manual
Alerts user to wear eye protection
This symbol designates that this tool is listed by Underwriters
Laboratories.
This symbol designates that this component is recognized by
Underwriters Laboratories.
This symbol designates that this tool is listed by Underwriters
Laboratories, to United States and Canadian Standards.
This symbol designates that this tool is listed by the Canadian
Standards Association.
This symbol designates that this tool is listed by the Canadian
Standards Association, to United States and Canadian Standards.
This symbol designates that this tool is listed by the Intertek Testing
Services, to United States and Canadian Standards.
This symbol designates that this tool complies to NOM Mexican
Standards.
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CHARGER
RELEASE
TAB
COLLET
WRENCH
COLLET NUT
COLLET
SHAFT
NOSE CAP
SWITCH
Functional Description & Specifications
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.
Model 7700 Cordless Rotary Tool
Model number 7700
Voltage rating 7.2V
Rated speed n 10,000-20,000/min
Collet capacities 1/32, 1/16", 3/32", 1/8"
Charger 760-01
Charge Time 3 Hour
Voltage rating 120 V 60 Hz
Battery pack 757-01
Capacity 200 mA
BATTERY PACK
RELEASE TAB
BATTERY PACK
BATTERY
PACK
SHAFT LOCK
BUTTON
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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.
Do not engage lock while the
Tool is running.
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 avail able 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 diam-
eter shank into a collet.
FIXING STUCK COLLETS – It is possible for a collet to
get stuck within the collet nut especially if a collet nut is
tightened onto the tool without a bit in place. If this happens, the collet can be removed from the collet nut by
pushing the shank of an accessory into the hole in the
collet nut. This should cause the collet to pop out of the
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. Re tighten collet nut and run the Cordless Rotary 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
Assembly
ALWAYS BE SURE THE TOOL IS
IN THE “0” POSITION BEFORE
CHANGING ACCESSORIES, CHANGING COLLETS OR
SERVICING YOUR CORDLESS ROTARY TOOL.
SHAFT
LOCK
BUTTON
TO LOOSEN
TO TIGHTEN
COLLET
NUT
COLLET
COLLET
NUT
IDENTIFICATION
RINGS
480 1/8"
COLLET
481 3/32"
COLLET
482 1/16"
COLLET
483 1/32"
COLLET
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.
(1/8" Collet is included with your tool)
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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 elec tric motor, is comfort able in the hand, and is made to
accept a large variety of accessories including abrasive wheels, drill bits, wire brushes, polishers,
engraving cutters, and cutting wheels. Accessories
come in a variety of shapes and permit you to do a
num ber of different jobs. As you be come 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 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 high-speed, low torque tool. The chief
difference to the user is that in the high speed tools,
the speed combined with the acces sory 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 pres sure 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 differ ent from other power
tools. The speed enables it to do jobs low speed tools
cannot do, such as en graving glass, etc.
Getting the most out of your Cordless Rotary Tool is
a matter of learning how to let this speed work for
you.
Releasing and inserting battery Pack
Remove the battery pack from the tool by squeezing
the two tabs on the battery pack together and slide the
battery pack out of the tool.
Charging the tool
The Model 7700 Cordless Rotary Tool battery pack is
not fully charged. The tool is equipped with a removable battery pack. Be sure to charge pack prior to initial use. For best re sults 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.
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.
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
(not included, available as accessory) 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.
BATTERY PACK
RELEASE TAB
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14
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. Con centrate 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
effi cient work out of the accessory.
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 L.E.D. light
will blink while charging. The L.E.D. will turn solid
when 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 hous ing 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.
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15
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.
Operating Speeds For Accessories
Set the speed indicator to fit the job to achieve the
best job results when working with different
ma te rials.
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 7700, 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 17 and 18 to determine the proper speed, based on the materi al being
worked and the type of cutter or other accessory being
used. These charts enable you to select both the correct acces sory and the optimum speed at a glance.
Needs for Slower Speeds
Certain materials, however, (some plastics, for ex ample) 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 Model 7700 is controlled by setting
this indicator on the housing.
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16
SPEED SETTINGS
Speed for plastic depends on thickness of material or amount of material to be removed.
CATALOG NUMBER
SOFT
WOOD
HARD
WOOD
LAMINATES
PLASTIC
STEEL
ALUMINUM,
BRASS, ETC.
SHELL/
STONE
CERAMIC GLASS
HIGH SPEED CUTTERS
100, 114, 115, 116, 117,
118, 121, 124, 125, 134,
144, 190, 191, 192, 193,
194, 196, 198, 199
2 2
1 2
SMALL ENGRAVING CUTTERS
105, 106, 107, 108, 109,
110, 111, 112, 113
2
2 1 2 2
RUBBER POLISHING POINT
425
2
CUTTING ACCESSORIES
409, 420, 426, 540,
EZ456, EZ409,EZ476
1 2 2 2
2
543, EZ544
2 2 1
2 2
545, EZ545
2 2
DIAMOND WHEEL POINTS
7103, 7105, 7117,
7120, 7122, 7123,
7134, 7144
2
2 2
2
ALUMINUM OXIDE GRINDING STONES
541, 903, 911, 921, 932,
941, 945, 952, 953, 954,
971, 997, 8153, 8175,
8193, 8215
2
2 2 1 2 2
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17
SPEED SETTINGS
Speed for plastic depends on thickness of material or amount of material to be removed.
CATALOG NUMBER
SOFT
WOOD
HARD
WOOD
LAMINATES
PLASTIC
STEEL
ALUMINUM,
BRASS, ETC.
SHELL/
STONE
CERAMIC
GLASS
SILICON CARBIDE GRINDING STONES
83142, 83322, 83702,
84922, 85422, 85602,
85622
2
2 1 2 2 2
TUNGSTEN CARBIDE AND STRUCTURED TOOTH TUNGSTEN CARBIDE CUTTERS
9901, 9902, 9903, 9904,
9905, 9906, 9912 9909,
9910, 9911 9931, 9932,
9933, 9934, 9935, 9936
2 2
1 2
SANDING BANDS AND DISCS
407, 408, 430, 431, 432,
438, 445, 446
1-2
1-2
1-2 2 2 1-2 1-2
411, 412, 413 2 2
1
1
EZ471SA, EZ472SA,
EZ473SA
1-2 1-2
1-2 2 2
1-2 1-2
FLAPWHEELS
502, 503, 504, 505 2 2
1 2 2
FINISHING ABRASIVE BUFFS
511E, 512E 2 2
1 2 2
DRILL BIT
150 2 2
1
2
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Service
NO USER SERVICEABLE
PARTS INSIDE. Preventive
maintenance performed by un au thorized personnel
may result in misplacing of internal wires and components which could cause serious hazard. We recom -
mend that all tool service be performed by a Dremel
Service Facility. SERVICE MEN: Disconnect tool and/or
charger from power source before servicing.
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
To avoid accidents, always
disconnect the tool and/or
charger from the power supply before cleaning. The
tool may be cleaned most effectively with com pressed
dry air. Always wear safety goggles when cleaning
tools with compressed air.
Certain cleaning agents and
solvents damage plastic parts.
Some of these are: gasoline, car bon tetrachloride, chlorinated cleaning solvents, ammonia and household
detergents that contain ammonia.
Extension Cords
If an extension cord is neces-
sary, a cord with adequate size
conductors 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 3-prong plugs and receptacles.
RECOMMENDED SIZES OF EXTENSION CORDS
120 VOLT ALTERNATING CURRENT TOOLS
NOTE: The smaller the gauge number, the higher the
cord capacity.
Maintenance
Tool’s
Ampere
Rating
Cord Size in A.W.G. Wire Sizes in mm
2
Cord Length in Feet Cord Length in Meters
25 50 100 150
15 30 60 120
3-6
6-8
8-10
10-12
12-16
18
18
18
16
14
16
16
16
16
12
16
14
14
14
–
14
12
12
12
–
0.75
0.75
0.75
1.0
–
0.75
1.0
1.0
2.5
–
1.5
2.5
2.5
4.0
–
2.5
4.0
4.0
–
–
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Dremel Accessories
Use only Dremel®, high-performance accessories. Other accessories are not designed
for this tool and may lead to personal injury or property damage.
Store accessories in a dry and temperate environment to avoid corrosion and deterioration.
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 en ables you
to get the perfect accessory for every need.
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 avail able
Dremel accessories. 1/8" collets are included in
most rotary tool kits.
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 pol ish ing
points. The reason mandrels are used is that sanding
discs, cutting wheels and similar accesso ries must be
replaced frequently. The mandrel is a per manent shank,
allowing you to replace only the worn head when necessary, thus saving the expense of replacing the shaft
each time.
Screw Mandrel No 401
This is a screw mandrel used with the felt polishing
tip and felt polishing wheels. 1/8" shank.
Small Screw Mandrel No 402
This is a mandrel with a small screw at its tip, and is
used with emery and fiberglass cutting wheels, sanding discs and polishing wheels. 1/8" shank.
EZ Lock Mandrel No 402
The Dremel EZ Lock makes accessory changes easy
as PULL - TWIST - RELEASE. The one-piece mandrel
design simplifies the process of changing cutting
wheels, buffs and detail abrasive brushes (EZ Lock
compatible accessories).
EZ Drum™ Mandrel No EZ407SA
The Dremel EZ Drum makes accessory changes easy
as PULL - INSERT - PRESS DOWN. The one-piece
mandrel design simplifies the process of changing
sanding bands.
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High Speed Cutters
Available in many shapes, high speed cutters are used
in carving, cutting and slotting in wood, plastics and
soft metals such as aluminum, copper and brass.
These are the accessories to use for freehand routing
or carving in wood or plastic, and for precision cutting. Made of high quality steel. 1/8" shank.
Tungsten Carbide Cutters
These are tough, long-lived cutters for use on hard ened steel, fired ceramics and other very hard ma terials. They can be used for engraving on tools and
garden equipment. 1/8" shanks.
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 complicat ed printed circuit
boards. They should not be used on steel and other
very hard materials but are excellent on wood, plastic
and soft metals. 1/8" shank.
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. 1/8" shank.
Aluminum Oxide Grinding Stones (red/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 re mov ing rust. These grinding stones can be resharped
with a dressing stone. In machine shops, high speed
drills and cut ters normally are ground with aluminum
oxide wheels. 1/8" shank.
Silicon Carbide Grinding Stones (blue/green)
Tougher than aluminum oxide points, these are made
es pecially for use on hard materials such as glass and
ce ramics. Typical uses might be the removal of stilt
marks and excess glaze on ceramics and engraving
on glass. 1/8" shank.
Diamond Wheel Points
Excellent for fine detail work on wood, jade, ceramic,
glass and other hard material. Bits are covered with
diamond particles. 1/8" shanks. (Not recommended
for drilling)
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21
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. Refer to
Operating Speeds section for proper tool speed setting. The three shapes come in three different materi-
als: stainless steel, brass and carbon wire. The stainless steel perform well on pewter, aluminum, stainless steel, and other metals, without leaving "afterrust". 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.
Bristle Brushes
These are excellent cleaning tools on silverware, jew elry 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.
Polishing Accessories
These include an impregnated polishing point and an
impregnated polishing wheel for bringing metal sur faces to smooth finish; a felt polishing tip and felt
polish ing 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. For best results polishing
accessories should be used at speeds not greater
than 15,000 RPM.
No polishing compound is needed when using the
425 Polishing Wheel.
INCORRECT:
Excessive pressure can cause wire breakage.
CORRECT: Wire tips doing the work.
15°
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Aluminum Oxide Abrasive Wheels
Use to remove paint, deburr metal, polish stainless
steel and other metals. Available in medium grit. 1/8"
shank.
Sanding Accessories
Sanding discs in fine, medium and coarse grades are
made to fit mandrel No. 402 and EZ407. They can be
used for nearly any small sanding job you might have,
from model making to fine furniture finish ing. 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 diffi cult 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
medium and coarse grades. Flapwheels grind and
polish flat or contoured surfaces. They are used most
effectively as a finishing sander after heavier surface
sanding and material removal is completed.
Flapwheels come in fine and coarse grades. Buffs are
a great finishing accessory for cleaning and light
sanding. They work effectively on metal, glass, wood,
aluminum and plastics. Coarse and medium buffs are
sold together. All buffs are sold individually. Do not
exceed 15,000 RPM in speed. 1/8" shank.
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.
Drywall Cutting Bit
Gives you fast, clean cuts in drywall. Use with Dremel
No 565/566 Cutting Guide attachment.
Tile Cutting Bit
Cuts ceramic wall tile, cement board, and plaster. Use
with Dremel No 565/566 Cutting Guide attachment.
Spiral Cutting Bit
Cuts through all types of wood and wood composites.
Use with Dremel No 565/566 Cutting Guide attachment.
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23
High Speed Router Bits
For routing, inlaying, and mortising in wood and other
soft materials. Use with Dremel No. 335 Router
attachment and No. 231 Shaper/Router table.
Brad Point Drill Bits
Titanium coated brad points stay on center and begin
drilling immediately. For use on wood. Size 1/8”,
5/32”, 3/16”, ¼” . 1/8” shank.
HSS Drill Bits
HSS drill bit for use in metal and plastic. Size 1/8”,
7/64”, 3/32”, 5/64”, 1/16”, 3/64”, 1/32”. Shank size
matches the drill bit size. Different collet size (481,
482, 483) or Dremel chuck (4486) required according
to drill bit being used.
Glass Drill Bits
Diamond tipped drill bits for use on glass and ceramic
wall tile. Lubricant included.
Collet Fan
Blows dust away for greater visibility to work piece.
Great for sanding, engraving and carving. Do not use
dust blower to stop or slow down the tool. Do not
contact dust blower with fingers or workpiece during
use.
Dremel Chuck
This chuck allows you to quickly and easily change
accessories on Dremel Rotary Tools without changing
collets. Accepts accessories with 1/32” - 1/8” shank.
Read instruction manual. Insert and securely tighten
the shank of the accessory well within the jaws of the
chuck.
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Replacing Screw Mandrel Accessories
Mandrel No. 402 has a small screw at its tip, and is
used with emery cutting wheels and sanding discs.
Higher speeds, usually maximum, are best for most
work, including cutting steel. Which is shown here.
Mandrel No. 401 is used with the felt polishing tip
and wheels. Thread the tip on to the screw carefully.
The felt tip must thread down straight on the screw
Mandrel, and be turned all the way to the collar.
To replace a band on the Drum Sander, loosen the screw
without removing it to contract the drum then slide the
old band off. Slide the new sanding band on and then
expand the drum by tightening the screw once again.
Before each use, check to
make certain that all components are assembled to accessory shank and that the
drum is sufficiently expanded to secure the band during use. If sanding band is loose on the drum during
operation it may “fly” off and strike you or bystanders.
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EZ Lock™ Operating Instructions
EZ Lock™ Mandrel No. EZ402 has a spring loaded
sleeve and is used with cutting wheels, abrasive buffs
and polishing cloth.
Always make sure the rotary
tool is “OFF” and disconnect
the plug from the power source or the battery pack
from the tool before changing accessories. Such
preventative safety measures reduce the risk of starting the power tool accidentally.
Always make sure accessory is properly seated on
mandrel before use. Incorrect seating of accessory on
mandrel may lead to personal injury or property damage.
To load accessory:
1. Place EZ Lock™ mandrel into collet as deep as pos-
sible and tighten collet nut.
Note: There is a blue spacer that will bottom out on
the collet nut, setting the mandrel to the correct
depth. When using with Dremel chuck, back the
mandrel out slightly before tightening.
2. Pull spring-loaded sleeve DOWN towards tool with
one hand and hold. You can brace the tool on the
body or work-bench for extra leverage (Fig. 1).
3. With the other hand, align bowtie shape on cut-off
wheel with mandrel and make sure metal insert is
facing away from the tool (Fig. 2).
4. Place wheel on the mandrel to a point just below
the bowtie on the mandrel and twist 90 degrees
until the bowtie shape on the wheel aligns with the
sleeve. Release sleeve. Wheel should lock in place
(Fig. 3).
5. When mounting sanding and polishing acces-
sories, align bowtie with metal insert on bottom of
accessory (Fig. 4 & 5).
To check for proper seating, hold shaft lock button
and twist accessory. Accessory will not be able to
rotate on mandrel.
To unload accessory:
1. Pull spring-loaded sleeve DOWN toward tool with
one hand (Fig. 1).
2. Hold sleeve down while twisting accessory 90
degrees.
3. Remove accessory.
During use
Avoid damage to EZ lock™ mandrel by not letting it
contact the workpiece.
FIG. 5
FIG. 2
FIG. 3
FIG. 1
FIG. 4
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26
EZ Drum™ Operating Instructions
EZ Drum™ Mandrel No. EZ407SA has a spring
loaded sleeve and is used with sanding bands.
Always make sure the rotary
tool is “OFF” and disconnect
the plug from the power source or the battery pack
from the tool before changing accessories. Such
preventative safety measures reduce the risk of starting the power tool accidentally.
Always make sure accessory is properly seated on
mandrel before use. Incorrect seating of accessory on
mandrel may lead to personal injury or property damage.
To load accessory:
1. As indicated, place two fingers underneath the
mandrel and pull firmly up. This will place the EZ
Drum™ in the "unlocked" position (Fig. 1).
2. Keeping two fingers beneath the mandrel, slide the
sanding band down until the entire blue mandrel is
covered (Fig. 2).
3. To return to "locked" position, press firmly down on
the top of the mandrel (Fig. 3).
Removing the sanding band on
the mandrel:
1. Place two fingers underneath the mandrel and pull
firmly up. This will place the EZ Drum™ in the
"unlocked" position (Fig. 1).
2. Sanding band will now easily slide off mandrel
(Fig. 2). Do not squeeze sanding band when
removing from EZ Drum™ mandrel, this can lead
to rubber band pulling off mandrel and becoming
inoperable.
FIG. 1
FIG. 2
FIG. 3
1600A012FU.qxp_7700 2/1/17 10:22 AM Page 26
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