Dremel 7700 Assembly instructions

1
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Operating/Safety Instructions
Consignes de fonctionnement/sécurité
Instrucciones de funcionamiento y seguridad
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P.O. Box 081126 Racine, I 53408-1126
7700

ork area safety
Keep work area clean and well lit. Cluttered or d rk
re s invite ccidents.
Do not operate power tools in explosive atmos-
pheres, such as in the presence of flammable
liquids, gases or dust. Power tools cre te sp rks
which m y ignite the dust or fumes.
Keep children and bystanders away while operating
a power tool. Distr ctions c n c use 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 nd m tching outlets will reduce risk
of electric shock.
Avoid body contact with earthed or grounded
surfaces such as pipes, radiators, ranges and refrig-
erators. There is n incre sed risk of electric shock if
your body is e rthed or grounded.
Do not expose power tools to rain or wet conditions.
W ter entering power tool will incre se the risk of
electric shock.
Do not abuse the cord. Never use the cord for carry-
ing, pulling or unplugging the power tool. Keep cord
away from heat, oil, sharp edges or moving parts.
D m ged or ent ngled cords incre se the risk of
electric shock.
hen operating a power tool outdoors, use an
extension cord suitable for outdoor use. Use of cord
suit ble 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 n GFCI reduces the
risk of electric shock.
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 in ttention while oper ting power tools m y result in
serious person l injury.
Use personal protective equipment. Always wear eye
protection. Protective equipment such s dust m sk,
non-skid s fety shoes, h rd h t, or he ring protection
used for ppropri te conditions will reduce person l
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.
C rrying power tools with your finger on the switch or
energizing power tools th t h ve the switch on invites
ccidents.
Remove any adjusting key or wrench before turning
the power tool on. A wrench or key left tt ched to
rot ting p rt of the power tool m y result in person l
injury.
Do not overreach. Keep proper footing and balance at
all times. This en bles better control of the power tool
in unexpected situ tions.
Dress properly. Do not wear loose clothing or
jewelry. Keep your hair, clothing and gloves away
from moving parts. Loose clothes, jewelry or long h ir
c n be c ught in moving p rts.
Read all safety warnings and all instructions. F ilure to follow the w rnings nd instructions
m y result in electric shock, fire nd/or serious injury.
SAVE ALL ARNINGS AND INSTRUCTIONS FOR FUTURE REFERENCE
The term “power tool” in the w rnings refers to your m ins-oper ted (corded) power tool or b ttery-oper ted
(cordless) power tool.
2
General Power Tool Safety arnings
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3
If devices are provided for the connection of dust
extraction and collection facilities, ensure these are
connected and properly used. Use of dust collection
c n reduce dust-rel ted h z rds.
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 nd s fer t the r te for which it w s
designed.
Do not use the power tool if the switch does not turn
it on and off. Any power tool th t c nnot be controlled
with the switch is d ngerous nd must be rep ired.
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 s fety me sures reduce the risk
of st rting the power tool ccident lly.
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 re d ngerous in the h nds of untr ined
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 oper-
ation. If damaged, have the power tool repaired
before use. M ny ccidents re c used by poorly
m int ined power tools.
Keep cutting tools sharp and clean. Properly m in-
t ined cutting tools with sh rp cutting edges re less
likely to bind nd re e sier 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 oper tions
different from those intended could result in
h z rdous situ tion.
Battery tool use and care
Recharge only with the charger specified by the
manufacturer. A ch rger th t is suit ble for one type of
b ttery p ck m y cre te risk of fire when used with
nother b ttery p ck.
Use power tools only with specifically designated
battery packs. Use of ny other b ttery p cks m y
cre te risk of injury nd fire.
hen 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 b ttery termin ls together m y c use
burns or fire.
Under abusive conditions, liquid may be ejected
from the battery, avoid contact. If contact accidentally
occurs, flush with water. If liquid contacts eyes, addi-
tionally seek medical help. Liquid ejected from the
b ttery m y c use irrit tion or burns.
Service
Have your power tool serviced by a qualified repair
person using only identical replacement parts. This
will ensure th t the s fety of the power tool is m in-
t ined.

4
Safety Rules for Cordless Rotary Tools
Use clamps or another practical way to secure and
support the workpiece to a stable platform. Holding
the work by your h nd or g inst the body le ves it
unst ble nd m y le d to loss of control.
Accessories must be rated for at least the speed
recommended on the tool warning label. Wheels
nd other ccessories running over r ted speed c n
fly p rt nd c use 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.
Accident l st rting m y occur bec use b ttery tools
with b ttery inserted re in the oper tive condition.
Be aware of the switch location, when placing the
tool down or when picking the tool up. You m y cci-
dent lly ctiv te the switch.
Always hold the tool with two hands during a start-up.
The re ction torque of the motor c n c use the tool to
twist.
Always wear safety goggles and dust mask. Use
only in well ventilated area. Using person l s fety
devices nd working in s fe 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 djustment
device c n unexpectedly shift, c using loss of control,
loose rot ting components will be violently thrown.
Do not reach in the area of the spinning bit. The
proximity of the spinning bit to your h nd m y not
lw ys be obvious.
Allow brushes to run at opera ting 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 disch rged during the
run-in time.
ire and bristle brushes must never be operated at
speeds greater than 15,000/min. Direct the dis-
charge of the spinning wire brush away from you.
Sm ll p rticles nd tiny wire fr gments m y be dis-
ch rged t high velocity during the “cle ning” ction
with these brushes nd m y become imbedded in
your skin. Bristles or wires will be disch rged from
the brush t high speeds.
" ear protective gloves and face shield with wire or
bristle brushes. Apply wire or bristle brushes light-
ly to the work as only the tips of the wire/bristles do
the work. “He vy” pressure on bristles will c use the
wire or bristle to become overstressed, resulting in
wiping ction nd will c use the bristles/wire to be
disch rged."
Carefully handle both the tool and individual grind-
ing 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. Fr gments from
wheel th t bursts during oper tion will fly w y t
gre t velocity possibly striking you or byst nders.
Never use dull or damaged bits. Sharp bits must be
handled with care. D m ged bits c n sn p during
use. Dull bits require more force to push the tool,
possibly c using the bit to bre k.
Use clamps to support workpiece whenever practi-
cal. 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 m teri l such s dowel rods,
pipes or tubing h ve tendency to roll while being
cut, nd m y c use the bit to “bite” or jump tow rd
you. Cl mping sm ll workpiece llows you to use
both h nds to control the tool.
Inspect your workpiece before cutting. hen cutting
irregularly shaped workpieces, plan your work so it
will not slip and pinch the bit and be torn from your
hand. For ex mple, if c rving wood, m ke sure there
re no n ils or foreign objects in the workpiece. N ils
or foreign objects c n c use the bit to jump.

5
Never start the tool when the bit is engaged in the
material. The bit cutting edge m y gr b the m teri l
c using loss of control of the cutter.
Avoid bouncing and snagging the wheel, especially
when working corners, sharp edges etc. This c n
c use loss of control nd kick-b ck.
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,
c uses the cutting edge of the bit to climb out of the
work nd 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. ait 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 rest rt unexpected-
ly c using serious person l injury.
Do not leave a running tool unattended, turn power
off. Only when tool comes to complete stop it is
s fe to put it down.
Do not grind or sand near flammable materials.
Sp rks from the wheel could ignite these m teri ls.
Do not touch the bit or collet after use. After use the
bit nd collet re too hot to be touched by b re h nds.
Regularly clean the tool's air vents by compressed
air. Excessive ccumul tion of powdered met l inside
the motor housing m y c use electric l f ilures.
Do not allow familiarity gained from frequent use of
your rotary tool to become commonplace. Alw ys
remember th t c reless fr ction of second is suf-
ficient to inflict severe injury.
Do not alter or misuse tool. Any lter tion or modifi-
c tion is misuse nd m y result in serious person l
injury.
This product is not intended for use as a dental drill,
in human or veterinary medical applications.
Serious injury m y result.
hen using the steel saws, cut off wheels, high
speed cutters or tungsten carbide cutters, always
have the work secure ly clamped. Never attempt to
hold the work with one hand while using any of
these accessories. The re son is th t these wheels
will gr b if they become slight ly c nted in the groove,
nd c n kick b ck c using loss of control resulting in
serious in jury. Your second h nd should be used to
ste dy nd guide the h nd holding the tool. When
cutoff wheel gr bs, the wheel itself usu lly bre ks.
When the steel s w, high speed cutters or tungsten
c rbide cutter gr b, it m y jump from the groove nd
you could lose control of the tool.
GFCI nd person l protection devices like electrici n’s
rubber gloves nd footwe r will further enh nce your
person l s fety.
Do not use AC only rated tools with a DC power sup-
ply. While the tool m y ppe r to work, the electric l
components of the AC r ted tool re likely to f il nd
cre te h z rd to the oper tor.
Keep handles dry, clean and free from oil and grease.
Slippery h nds c nnot s fely control the power tool.
Develop a periodic maintenance schedule for your
tool. hen cleaning a tool be careful not to disassem-
ble any portion of the tool since internal wires may be
misplaced or pinched or safety guard return springs
may be improperly mounted. Cert in cle ning gents
such s g soline, c rbon tetr chloride, mmoni , etc.
m y d m ge pl stic p rts.
Ensure the switch is in the off position before insert-
ing battery pack. Inserting the b ttery p ck into
power tools th t h ve the switch on invites ccidents.
Additional Safety arnings

Some dust created by power sand-
ing, sawing, grinding, drilling,
and other construction activities contains chemicals
known to cause cancer, birth defects or other repro-
ductive harm. Some examples of these chemicals
are:
• Le d from le d-b sed p ints,
• Cryst lline silic from bricks nd cement nd other
m sonry products, nd
• Arsenic nd chromium from chemic lly-tre ted
lumber.
Your risk from these exposures v ries, depending on
how often you do this type of work. To reduce your
exposure to these chemic ls: work in well ventil ted
re , nd work with pproved s fety equipment, such
s those dust m sks th t re speci lly designed to filter
out microscopic p rticles.
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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 prod-
uct or direct replacement as listed in the catalog or
this manual. Do not substitute ny other ch rger. Use
only Dremel pproved ch rgers with your product. See
Function l Description nd Specific tions.
Do not disassemble charger or operate the charger if
it has received a sharp blow, been dropped or other-
wise damaged in any way. Replace damaged cord or
plugs immediately. Incorrect re ssembly or d m ge
m y 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. B ttery short or fire m y result.
Charge only Dremel approved rechargeable batter-
ies. See Function l Description nd Specific tions.
Other types of b tteries m y burst c using person l
injury nd d m ge.
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 loca-
tions where temperatures will not exceed 120
degrees F (49 degrees C). This is import nt to prevent
serious d m ge to the b ttery cells.
Battery leakage may occur under extreme usage or
temperature conditions. Avoid contact with skin and
eyes. The b ttery liquid is c ustic nd could c use
chemic l burns to tissues. If liquid comes in cont ct
with skin, w sh quickly with so p nd w ter, then with
lemon juice or vineg r. If the liquid cont cts your eyes,
flush them with w ter for minimum of 10 minutes nd
seek medic l ttention.
Place charger on flat non-flammable surfaces and
away from flammable materials when re-charging
battery pack. The ch rger nd b ttery p ck he t during
ch rging. C rpeting nd other he t insul ting surf ces
block proper ir circul tion which m y c use overhe t-
ing of the ch rger nd b ttery p ck. If smoke or melting
of the c se re observed unplug the ch rger immedi te-
ly nd do not use the b ttery p ck or ch rger.
Use of an attachment not recommended or sold by
Dremel may result in a risk of fire, electric shock or
injury to persons.
FCC Caution:
The m nuf cturer is not responsible for r dio interfer-
ence c used by un uthorized modific tions to this
equipment. Such modific tions could void the user’s
uthority to oper te the equipment.
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This device complies with P rt 15 of the FCC Rules.
Oper tion is subject to the following two conditions:
1) This device m y not c use h rmful interference, nd
2) This device must ccept ny interference received,
including interference th t m y c use undesired
oper tion.
NOTE! This equipment h s been tested nd found to
comply with the limits for Cl ss B digit l devices, pur-
su nt to P rt 15 of the FCC rules. These limits re
designed to provide re son ble protection g inst
h rmful interference in residenti l inst ll tion. This
equipment gener tes uses nd c n r di te r dio fre-
quency energy nd, if not inst lled nd used in ccor-
d nce with the instructions, m y c use h rmful inter-
ference to r dio communic tions. However, there is no
gu r ntee th t interference will not occur in p rticul r
inst ll tion. If this equipment does c use h rmful inter-
ference to r dio or television reception, which c n be
determined by turning the equipment off nd on, the
user is encour ged to try to correct the interference by
one or more of the following me sures:
• Reorient or reloc te the receiving ntenn .
• Incre se the sep r tion between the equipment nd
receiver.
• Connect the equipment into n outlet on circuit
different from th t to which the receiver is connect-
ed.
• Consult the de ler or n experienced r dio/TV tech-
nici n for help.
Battery Care
hen batteries are not in tool or
charger, keep them away from
metal objects. For ex mple, to protect termin ls from
shorting DO NOT pl ce b tteries in tool box or pocket
with n ils, screws, keys, etc. Fire or injury m y result.
DO NOT PUT BATTERIES INTO FIRE OR EXPOSE TO
HIGH HEAT. They m y explode.
Battery Disposal
Do not attempt to disassemble the
battery or remove any com ponent
projecting from the battery terminals. Fire or injury
m y result. Prior to dispos l, protect exposed termin ls
with he vy insul ting t pe to prevent shorting.
Nickel-Cadmium Batteries
If equipped with nickel-c dmium b ttery, the b t-
tery must be collected, recycled or disposed of in n
environ ment lly sound m nner.
“The EPA certified RBRC B ttery
Recycling Se l on the nickel-c d-
mium (Ni-Cd) b ttery indic tes
Robert Bosch Tool Corpor tion is
volunt rily p rticip ting in n
industry progr m to collect nd
recycle these b tteries t the end of their useful
life, when t ken out of service in the United St tes
or C n d . The RBRC progr m provides conve-
nient lter tive to pl cing used Ni-Cd b tteries into
the tr sh or the munici p l w ste stre m, which
m y be illeg l in your re .
Ple se c ll 1-800-8-BATTERY for inform tion on Ni-
Cd b ttery recycling nd dispos l b ns/restrictions
in your re , or return your b tteries to
Skil/Bosch/Dremel Service Center for recycling.
Robert Bosch Tool Corpor tion’s involvement in
this progr m is p rt of our commitment to pre-
serving our environment nd conserving our n t-
ur l resources.”
Alkaline Batteries
Commerci lly v il ble lk line cells c n be dis-
posed of in municip l solid w ste stre m.
7
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8
IMPORTANT: Some of the following symbols m y be used on your tool. Ple se study them nd le rn their
me ning. Proper interpret tion of these symbols will llow you to oper te the tool better nd s fer.
Symbol Name Designation/Explanation
V Volts Volt ge (potenti l)
A Amperes Current
Hz Hertz Frequency (cycles per second)
W W tt Power
kg Kilogr ms Weight
min Minutes Time
s Seconds Time
Di meter Size of drill bits, grinding wheels, etc.
n0 No lo d speed Rot tion l speed, t no lo d
.../min Revolutions or reciproc tion per minute Revolutions, strokes, surf ce speed,
orbits etc. per minute
0 Off position Zero speed, zero torque...
1, 2, 3, ... Selector settings Speed, torque or position settings.
I, II, III, Higher number me ns gre ter speed
Infinitely v ri ble selector with off Speed is incre sing from 0 setting
Arrow Action in the direction of rrow
Altern ting current Type or ch r cteristic of current
Direct current Type or ch r cteristic of current
Altern ting or direct current Type or ch r cteristic of current
Cl ss II construction Design tes Double Insul ted Construction tools.
E rthing termin l Grounding termin l
W rning symbol Alerts user to w rning mess ges
Ni-C d RBRC se l Design tes Ni-C d b ttery recycling progr m
Symbols
0

9
Symbols
IMPORTANT: Some of the following symbols m y be used on your tool. Ple se study them nd le rn their
me ning. Proper interpret tion of these symbols will llow you to oper te the tool better nd s fer.
This symbol design tes th t
this tool is listed by
Underwriters L bor tories.
This symbol design tes th t
this tool is listed by the
C n di n St nd rds
Associ tion.
This symbol design tes th t this
tool is listed by the C n di n
St nd rds Associ tion, to United
St tes nd C n di n St nd rds. This symbol
design tes th t
this tool com-
plies
to NOM
Mexic n
St nd rds.
This symbol design tes th t this
tool is listed by Underwriters
L bor tories, to United St tes nd
C n di n St nd rds.
This symbol design tes th t this tool is listed by the Intertek Testing Services, to
United St tes nd C n di n St nd rds.

10
CHARGER
BATTERY
PACK
RELEASE
TAB
COLLET NUT S ITCH
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 s fety me -
sures reduce the risk of st rting the tool ccident lly.
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Model 7700 Cordless Rotary Tool
Model number 7700
Volt ge r ting 7.2V
No lo d speed n0 10,000-20,000/min
Collet c p cities 1/32, 1/16", 3/32", 1/8"
Charger 760-01
Ch rge Time 3 Hour
Volt ge r ting 120 V 60 Hz
Battery pack 757-01
C p city 200 mA
BATTERY PACK
RELEASE TAB
BATTERY PACK
RELEASE TAB

11
Assembly
AL AYS 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 NUT— To loosen, first press sh ft lock button
nd rot te the collet nut by h nd until the lock eng ges
the sh ft preventing further rot tion.
Do not engage lock while the Tool
is running.
With the sh ft lock eng ged, loosen the collet nut by
h nd. Ch nge ccessories by inserting the new one
into the collet s f r s possible to minimize runout nd
unb l nce. With the sh ft lock eng ged, finger tighten
the collet nut until the ccessory sh nk 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 -
tr tion), to ccommod te different sh nk sizes, re
v il ble for your Cordless Rot ry Tool. To inst ll dif-
ferent collet, remove the collet nut nd remove the old
collet. Insert the unslotted end of the collet in the hole
in the end of the tool sh ft. Repl ce collet nut on the
sh ft. Always use the collet which matches the shank
size of the accessory you plan to use. Never force
l rger di meter sh nk into collet.
BALANCING ACCESSORIES — For precision work, it is
import nt th t ll ccessories be in good b l nce
(much the s me s the tires on your utomobile). To
true up or b l nce n ccessory, slightly loosen collet
nut nd give the ccessory or collet 1/4 turn. Re -
tighten collet nut nd run the Cordless Rot ry Tool. You
should be ble to tell by the sound nd feel if your
ccessory is running in b l nce. Continue djusting in
this f shion until best b l nce is chieved. To m int in
b l nce on br sive wheel points, before e ch use,
with the wheel point secured in the collet, turn on the
Cordless Rot ry Tool nd run the 415 Dressing Stone
(not included, v il ble s ccessory) lightly g inst
the revolving wheel point. This removes high spots nd
trues up the wheel point for good b l nce.
Remember, your new Dremel Cordless Rot ry Tool is
the finest power tool of its kind. But its perform nce
is only s good s the ccessories with which it is
used. We recommend only Dremel ccessories be
used. Use of ny other ccessories m y cre te h z-
rd. We hope you’ll enjoy m ny ye rs of trouble free
ple sure from your Dremel Cordless Rot ry Tool.
COLLET IDENTIFICATION CHART — Collet sizes c n
be identified by the rings on the b ck end of collet.
1/32" Collet h s one (1) ring.
1/16" Collet h s two (2) rings.
3/32" Collet h s three (3) rings.
1/8" Collet h s no rings.
(1/8" Collet is included with your tool)
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CAUTION
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12
Releasing and inserting battery Pack
Remove the b ttery p ck from the tool by squeezing
the two t bs on the b ttery p ck together nd slide the
b ttery p ck out of the tool.
Charging the tool
The Model 7700 Cordless Rot ry Tool b ttery p ck is
not fully ch rged. The tool is equipped with remov ble
b ttery p ck. Be sure to ch rge p ck prior to initi l use.
For best re sults on first ch rge, ch rge p ck overnight.
To charge the tool:
1. Put the switch in the “OFF” position.
2. Squeeze rele se t bs on both sides of b ttery p ck,
nd remove p ck from b ck of tool s shown on p ge
12.
3. Align exterior sh pe of b ttery p ck with exterior
sh pe of ch rger, squeeze rele se t bs, insert b ttery
p ck into ch rger s shown nd rele se pressure on
t bs so it locks in pl ce.
4. Plug ch rger into the power source. The green L.E.D.
light indic tes connection h s been m de nd the
b ttery p ck is ch rging. The L.E.D. light will blink while
ch rging. The L.E.D. will turn solid when ch rging is
complete. Under norm l us ge the tool norm lly
requires 3 hours ch rging time to re ch full c p city.
5. When ch rging is completed, squeeze rele se t bs on
b ttery p ck nd remove p ck from ch rger.
6. Align exterior sh pe of b ttery p ck with exterior
sh pe of the hous ing of tool s shown. Squeeze rele se
t bs, insert b ttery p ck into b ck of tool, nd rele se
pressure on t bs so it locks in pl ce.
Operation Instructions
Introduction
The Cordless Rot ry Tool is h ndful of high-speed
power. It serves s c rver, grinder, polisher, s nder,
cutter, power brush, drill nd more.
Your Cordless Rot ry Tool h s sm ll, powerful elec tric
motor, is comfort ble in the h nd, nd is m de to ccept
l rge v riety of ccessories including br sive wheels,
drill bits, wire brushes, polishers, engr ving cutters,
nd cutting wheels. Accessories come in v riety of
sh pes nd permit you to do num ber of different jobs.
As you be come f mili r with the r nge of ccessories
nd their uses, you will le rn just how vers tile your
Cordless Rot ry Tool is. You’ll see dozens of uses you
h dn’t thought of before now.
The re l secret of the Cordless Rot ry Tool is its speed.
To underst nd the dv nt ges of its high speed, you
h ve to know th t the st nd rd port ble electric drill
runs t speeds up to 2,800 revolutions per minute. The
typic l electric drill is low-speed, high torque tool; the
Cordless Rot ry Tool is just the opposite — high-
speed, low torque tool. The chief difference to the user
is th t in the high speed tools, the speed combined with
the cces sory mounted in the collet does the work. You
don’t pply pressure to the tool, but simply hold nd
guide it. In the low speed tools, you not only guide the
tool, but lso pply pres sure to it, s you do, for ex mple,
when drilling hole.
It is this high speed, long with its comp ct size nd
wide v riety of speci l ccessories, th t m kes your
Cordless Rot ry Tool differ ent from other power tools.
The speed en bles it to do jobs low speed tools c nnot
do, such s en gr ving gl ss, etc.
Getting the most out of your Cordless Rot ry Tool is
m tter of le rning how to let this speed work for you.
BATTERY PACK
RELEASE TAB

Important Charging Notes
If you nticip te long periods of non-use for your tool
it's best to unplug your ch rger nd b ttery p ck from
its power source. Unplugging the ch rger will extend
the life expect ncy of the ch rger nd b ttery p ck.
The b ttery p ck ccepts only bout 80% of its m xi-
mum ch rge c p city with its first ch rge; or, fter pro-
longed stor ge it will lso require ddition l time on the
first ch rge. However, fter sever l ch rge nd dis-
ch rge cycles, the b tteries should be up to full ch rge
c p city nd delivering m ximum perform nce.
13
Using the Cordless Rotary Tool
The first step in le rning to use the Cordless Rot ry Tool
is to get the “feel” of it. Hold it in your h nd nd feel its
weight nd b l nce. Feel the t per of the housing. This
t per permits the tool to be gr sped much like pen or
pencil.
When you turn on the tool for the first time, hold it w y
from your f ce. Accessories c n be d m ged during
h ndling, nd c n fly p rt s they come up to speed.
This is not common, but it does h ppen.
Pr ctice on scr p m teri ls first to see how the Cordless
Rot ry Tool cuts. Keep in mind th t the work is done by
the speed of the tool nd by the ccessory in the collet.
You should not le n on or push the tool into the work.
Inste d, lower the spinning ccessory lightly to the
work nd llow it to touch the point t which you w nt
cutting (or s nding or etching, etc.) to begin. Con -
centr te on guiding the tool over the work using very lit-
tle pressure from your h nd. Allow the ccessory to do
the work.
Usu lly, it is best to m ke series of p sses with the
tool r ther th n ttempt to do ll the work in one p ss.
To m ke cut, for ex mple, p ss the tool b ck nd forth
over the work, much s you would sm ll p int brush.
Cut little m teri l on e ch p ss until you re ch the
desired depth. For most work, the deft, gentle touch is
best. With it, you h ve the best control, re less likely to
m ke errors, nd will get the most effi cient work out of
the ccessory.

14
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 LO nd HI switch. When
the switch indic tor is in position 1 or LO, the tool runs
t bout 10,000 RPM. When the switch indic tor is in
position 2 or HI, the tool runs t bout 20,000 RPM.
You c n refer to the ch rts on p ges 15 nd 16 to deter-
mine the proper speed, b sed on the m teri l being
worked nd the type of cutter or other ccessory being
used. These ch rts en ble you to select both the cor-
rect cces sory nd the optimum speed t gl nce.
Needs for Slower Speeds
Cert in m teri ls, however, (some pl stics, for ex -
mple) require rel tively slow speed bec use t high
speed the friction of the tool gener tes he t nd c us-
es the pl stic to melt.
Most work is done t high speed on your Cordless
Rot ry Tool. Lower speeds re needed only for cert in
t sks.
The speed of Model 7700 is controlled by setting
this indicator on the housing.

15
SPEED SETTINGS Speed for plastic depends on thickness of material or amount of material to be removed.
CATALOG
NUMBER SOFT
OOD HARD
OOD LAMINATES
PLASTIC STEEL ALUMINUM,
BRASS, ETC. SHELL/
STONE CERAMIC GLASS
100, 114, 115, 116, 117,
118, 121, 124, 125, 134,
144, 190, 191, 192, 193,
194, 196, 198, 199
2 2 2 2
2 2 2 2
2 2 2 2
1 1 1 1
SMALL ENGRAVING CUTTERS
105, 106, 107, 108, 109,
110, 111, 112, 113
2 2
2 2
2 2
2 2
1 1
HIGH SPEED CUTTERS
RUBBER POLISHING POINT
CUTTING ACCESSORIES — SEE ARNING PAGE 5
425 2
DIAMOND HEEL POINTS
7103, 7105, 7117,
7120, 7122, 7123,
7134, 7144
2 2 2
2 2 2
2 2 2
2 2 2
409, 420, 426, 540, EZ456
EZ409,EZ476
543, EZ544 545, EZ545
2 2
2 2
2 2
1 1 1
2 2
2 2 2
2 2 2
ALUMINUM OXIDE GRINDING STONES
903, 911, 921, 932, 941,
945, 952, 953, 954, 971,
997, 8153, 8175, 8193,
8215
541
222 1 22
222 1 2 2

16
SPEED SETTINGS Speed for plastic depends on thickness of material or amount of material to be removed.
CATALOG
NUMBER SOFT
OOD HARD
OOD LAMINATES
PLASTIC STEEL ALUMINUM,
BRASS, ETC. SHELL/
STONE CERAMIC GLASS
83142, 83322, 83702,
84922, 85422, 85602,
85622
2
2
1
SILICON CARBIDE GRINDING STONES
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
2
2
1 1
2
2
22
430, 431, 438
445, 446
407, 408, 432
411, 412, 413
EZ471SA, EZ472SA,
EZ473SA
502, 503, 504, 505 2 2 22 1
1-2 1-2 1-2 1-2 1-2
1-2 1-2 1-2 1-2 1-2
2 2 2 1 2 2
SANDING BANDS AND DISCS
150 22 1
DRILL BIT
511E, 512E 22 2
FINISHING ABRASIVE BUFFS
1-2 1-2 1-2
2
1-2 1-2
1-2 1-2 1-2
2
1-2 1-2
1-2 1-2 1-2
1
1-2 1-2
2 2 2 2 2
1
2
FLAP HEELS
2
2

17
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 th t ll
tool service be performed by Dremel Service F cility.
SERVICE MEN: Disconnect tool nd/or ch rger from
power source before servicing.
D.C. motors
The motor in your tool h s been engineered for m ny
hours of depend ble service. To m int in pe k efficien-
cy of the motor, we recommend it be ex mined every
six months. Only genuine Dremel repl cement motor
speci lly designed for your tool should be used.
Cleaning
To avoid accidents, always dis-
connect the tool and/or charger
from the power supply before cleaning. The tool m y
be cle ned most effectively with com pressed dry ir.
Always wear safety goggles when cleaning tools with
compressed air.
Certain cleaning agents and sol-
vents damage plastic parts. Some
of these re: g soline, c r bon tetr chloride, chlorin ted
cle ning solvents, mmoni nd household detergents
th t cont in mmoni .
Extension Cords
If an extension cord is necessary,
a cord with adequate size conduc-
tors that is capable of carrying the current necessary
for your tool must be used. This will prevent excessive
volt ge drop, loss of power or overhe ting. Grounded
tools must use 3-wire extension cords th t h ve 3-
prong plugs nd recept cles.
RECOMMENDED SIZES OF EXTENSION CORDS
120 VOLT ALTERNATING CURRENT TOOLS
NOTE: The sm ller the g uge number, the he v i er the
cord.
!
ARNING
!
ARNING
!
CAUTION
Maintenance
Tool’s
Ampere
Rating
Cord Size in A.W.G. Wire Sizes in mm2
3-6
6-8
8-10
10-12
12-16
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 — — — — — —
25 50 100 150 15 30 60 120
Cord Length in Feet Cord Length in Meters
!
ARNING

18
The number nd v riety of ccessories for the Rot ry
Tool re lmost limitless. There is c tegory suited to
lmost ny job you might h ve to do — nd v riety of
sizes nd sh pes within e ch c tegory which en bles
you to get the perfect ccessory for every need.
Collets
If you expect to use v riety of ccessories, we recom-
mend th t in the beginning you purch se complete
set of four collets. Store these so th t you will h ve the
proper size of collet for ny ccessory or drill bit you
w nt 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 m ndrel is sh nk with thre ded or screw he d,
which re required when you use polishing cces-
sories, cutting wheels, s nding discs, nd pol ish ing
points. The re son m ndrels re used is th t s nding
discs, cutting wheels nd simil r ccesso ries must be
repl ced frequently. The m ndrel is per m nent sh nk,
llowing you to repl ce only the worn he d when nec-
ess ry, thus s ving the expense of repl cing the sh ft
e ch time.
Screw Mandrel N° 401
This is screw m ndrel used with the felt polishing tip
nd felt polishing wheels. 1/8" sh nk.
Small Screw Mandrel N° 402
This is m ndrel with sm ll screw t its tip, nd is
used with emery nd fibergl ss cutting wheels, s nding
discs nd polishing wheels. 1/8" sh nk.
EZ Lock Mandrel N° 402
The Dremel EZ Lock m kes ccessory ch nges e sy s
PULL - TWIST - RELEASE. The one-piece m ndrel
design simplifies the process of ch nging cutting
wheels, buffs nd det il br sive brushes (EZ Lock
comp tible ccessories).
Dremel Accessories
Use only Dremel®, high-performance accessories. Other ccessories re not designed for
this tool nd m y le d to person l injury or property d m ge.
!
ARNING
High Speed Cutters
Av il ble in m ny sh pes, high speed cutters re used
in c rving, cutting nd slotting in wood, pl stics nd
soft met ls such s luminum, copper nd br ss. These
re the ccessories to use for freeh nd routing or c rv-
ing in wood or pl stic, nd for precision cutting. M de
of high qu lity steel. 1/8" sh nk.
Tungsten Carbide Cutters
These re tough, long-lived cutters for use on h rd ened
steel, fired cer mics nd other very h rd m teri ls. They
c n be used for engr ving on tools nd g rden equip-
ment. 1/8" sh nks.

19
This group h s wide v riety of sizes nd sh pes, nd
re m de for intric te work on cer mics (greenw re),
wood c rvings, jewelry nd scrimsh w. They often re
used in m king complic t ed printed circuit bo rds.
They should not be used on steel nd other very h rd
m teri ls but re excellent on wood, pl stic nd soft
met ls. 3/32" sh nk.
Structured Tooth Tungsten Carbide Cutters
F st cutting, needle-sh rp teeth for gre ter m teri l
remov l with minimum lo ding. Use on fibergl ss,
wood, pl stic, epoxy nd rubber. 1/8" sh nk.
Aluminum Oxide Grinding Stones (red/brown)
Round, pointed, fl t — you n me the sh pe nd there
is one v il ble in this c tegory. These re m de of lu-
minum oxide nd cover virtu lly every possible kind of
grinding pplic tion. Use them for sh rpening l wn
mower bl des, screwdriver tips, knives, scissors, chis-
els nd other cutting tools. Use to remove fl sh from
met l c stings, deburring ny met l fter cutting,
smoothing welded joints, grinding off rivets nd re mov -
ing rust. These grinding stones c n be resh rped with
dressing stone. In m chine shops, high speed drills
nd cut ters norm lly re ground with luminum oxide
wheels. 1/8" sh nk.
Silicon Carbide Grinding Stones (blue/green)
Tougher th n luminum oxide points, these re m de
es peci lly for use on h rd m teri ls such s gl ss nd
ce r mics. Typic l uses might be the remov l of stilt
m rks nd excess gl ze on cer mics nd engr ving on
gl ss. 1/8" sh nk.
Diamond heel Points
Excellent for fine det il work on wood, j de, cer mic,
gl ss nd other h rd m teri l. Bits re covered with di -
mond p rticles. 3/32" sh nks. (Not recommended for
drilling)
ire Brushes
Three different sh pes of wire brushes re v il ble. 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 sh pes come in three different m teri ls: st inless
steel, br ss nd c rbon wire. The st inless steel per-
form well on pewter, luminum, st inless steel, nd
other met ls, without le ving " fter-rust". Br ss brushes
re non sp rking, nd softer th n steel; m king them
good for use on soft met l like gold, cooper nd br ss.
The on wire brushes re good for gener l purpose
cle ning.
Bristle Brushes
These re excellent cle ning tools on silverw re, jew elry
nd ntiques. The three sh pes m ke it possible to get
into tight corners nd other difficult pl ces. Bristle
brushes c n be used with polishing compound for
f ster cle ning or polishing.
Cordless Rotary Tool Accessories (Cont.)

20
Brushing Pressure
1. Remember, the tips of wire brush do the work.
Oper te the brush with the lightest pressure so only the
tips of the wire come in cont ct with the work.
2. If he vier pressures re used, the wires will be over-
stressed, resulting in wiping ction; nd if this is con-
tinued, the life of the brush will be shortened due to wire
f tigue.
3. Apply the brush to the work in such w y th t s much
of the brush f ce s possible is in full cont ct with the
work. Applying the side or edge of the brush to the work
will result in wire bre k ge nd shortened brush life.
Cordless Rotary Tool Accessories (Cont.)
INCORRECT:
Excessive pressure c n c use wire bre k ge.
15°
CORRECT:
Wire tips doing the work.
Polishing Accessories
These include n impregn ted polishing point nd n
impregn ted polishing wheel for bringing met l sur f ces
to smooth finish; felt polishing tip nd felt polish ing
wheel, nd cloth polishing wheel, ll used for polishing
pl stics, met ls, jewelry nd sm ll p rts. Also included in
this group is polishing compound (No. 421) for use
with the felt nd cloth polishers.
Polishing points m ke very smooth surf ce, but high
luster is obt ined using felt or cloth wheels nd 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.
Aluminum Oxide Abrasive heels
Use to remove p int, deburr met l, polish st inless steel
nd other met ls. Av il ble in medium grit. 1/8" sh nk.
Sanding Accessories
S nding discs in fine, medium nd co rse gr des re
m de to fit m ndrel No. 402. They c n be used for ne rly
ny sm ll s nding job you might h ve, from model m k-
ing to fine furniture finish ing. In ddition, there is the
drum s nder, tiny drum which fits into the Rot ry Tool
nd m kes it possible to sh pe wood, smooth fibergl ss,
s nd inside curves nd other diffi cult pl ces, nd other
s nding jobs. You repl ce the s nding b nds on the