Makita 6821 User manual

Drywall Screwdriver
Capacities
Self drilling screw Drywall screw
5 mm (3116")
6
mm (114")
MODEL 6821
Variable speed / Reversing
Bit shank Size No load speed Overall Net
(RPM) length weight
273 mm 1.3 kg
~ 4r000 (10-314") (2.9 lbsl
114" Hex
INSTRUCTION MANUAL
DOUBLE
I N S U LATlO N
SPEC I Fl CAT10 NS

I M PO RTANT
SAFETY INSTRUCTIONS
(For All Tools)
WARNING: WHEN USING ELECTRICTOOLS, BASICSAFETY
PRECAUTIONS SHOULD ALWAYS BE FOLLOWED TO REDUCE
THE RISK OF FIRE, ELECTRIC SHOCK, AND PERSONAL
INJURY, INCLUDING THE FOLLOWING:
READ ALL INSTRUCTIONS.
1.
2.
3.
4.
5.
6.
7.
8.
9.
IO.
11.
12.
13.
2
KEEP WORK AREA CLEAN. Cluttered areas and benches invite injuries.
CONSIDER WORK AREA ENVIRONMENT. Don't use power tools
in damp
or wet locations. Keep work area well
lit. Don't expose power tools torain.
Don't use tool in presence of flammable liquids or gases.
KEEP CHILDREN AWAY. All visitors should be kept away from work area.
Don't let visitors contact tool or extension cord.
STORE IDLETOOLS. When not
in use, tools should bestored in dry, and high
or locked-up place - out of reach of children.
DON'T FORCE TOOL.
It will dothejob better and safer atthe ratefor which
it was intended.
USE RIGHT TOOL. Don't force small tool or attachment to do the job of a
heavy-duty tool. Don't usetool for purpose notintended; for example, don't
use circular saw for cutting tree limbs or logs.
DRESS PROPERLY. Don't wear loose clothing orjewelry. They can becaught
in moving parts. Rubber gloves and non-skid footwear are recommended
when working outdoors. Wear protective hair covering to contain longhair.
USE SAFETY GLASSES. Also use face or dust mask if cutting operation
is
dusty.
DON'T ABUSE CORD. Never carry tool by cord or yank
it todisconnect from
receptacle. Keep cord from heat, oil, and sharp edges.
SECURE WORK. Use clamps or a vise to hold work. It's safer than using
your hand and
it frees both hands to operate tool.
DON'T OVERREACH. Keep proper footing and balance at all times.
MAINTAIN TOOLS WITH CARE. Keep tools sharp and clean for better and
safer performance. Follow instructions for lubricating and changing acces-
sories. Inspect tool cords periodicallyand if damaged, have repairedby autho-
rized service facility. Inspect extension cords periodically and replace
if
damaged. Keep handles dry, clean, and free from oil and grease.
DISCONNECTTOOLS. When not
in use, before servicing, and when chang-
ing accessories, such as blades, bits, cutters.

14. REMOVE ADJUSTING KEYS AND WRENCHES. Form habit of checking to
see that keys and adjusting wrenches are removed from tool before turning
it on.
15. AVOID UNINTENTIONALSTARTING. Don't carry toolwithfinger onswitch.
Be sure switch is
OFF when plugging in.
16. EXTENSION CORDS. Make sure your extension cord is in good condition.
When using an extension cord, be sure to use one heavy enough to carry
the current your product will draw. An undersized cord will cause a drop
inlinevoltage resultingin
loss of power and overheating. Table 1 shows the
correct size touse depending oncordlengthand nameplate ampere rating.
If
in doubt, use the next heavier gage. The smaller the gage number, the
heavier the cord.
TABLE 1
MINIMUM GAGE FOR CORD SETS
0- 6
6
- 10
10
- 12
12
- 16
I
Total Length of Cord in Feet
18 16 14
16 16 14 12
14 12
Not Recommended
18 16 ;: 1 12
I 0 - 25 I 26 - 50 I 51 - 100 I 101 - 150
Ampere Rating
More Not More
Than Than
AWG
17. OUTDOOR USEEXTENSION CORDS.When toolisused outdoors, use only
extension cords intended for use outdoors and
so marked.
18. STAY ALERT. Watch what you are doing, use common sense. Don't operate
tool when you are tired.
19. CHECK DAMAGED PARTS. Before further use of the tool, a guard or other
part that is damaged should be carefully checked to determine that
it will
operate properly and perform itsintended function. Check for alignment of
moving parts, bindingof movingparts, breakage
of parts, mounting, and any
other conditions that may affect its operation. A guard or other part that
is damaged should be properly repaired or replaced by an authorized serv-
ice center unless otherwise indicated elsewhere
in this instruction manual.
Have defective switches replaced by authorized service center. Don't use
tool
if switch does not turn it on and off.
20. GUARD AGAINST ELECTRIC SHOCK. Prevent body contact with grounded
surfaces. For example; pipes, radiators, ranges, refrigerator enclosures.
21. REPLACEMENT PARTS. When servicing, useonly identicalreplacement parts.
22. POLARIZEDPLUGS. To reduce the risk of electric shock, this equipment has
a polarized plug (one blade is wider than the other). This plug will
fit in a
polarized outlet only one way. If the plug does not
fit fully in the outlet,
reversethe plug. If
it stilldoes not fit, contacta qualified electriciantoinstall
the proper outlet. Do not change
the plug in any way.
3

VOLTAGE WARNING: Before connecting the tooltoa powersource (receptacle,
outlet, etc.) be sure the voltage supplied is the same as that specified on the
nameplate of the tool. A power source
with voltage greater than that specified
for the tool can result
in SERIOUS INJURY tothe user - as well as damage to
the tool. If in doubt,
DO NOT PLUG IN THE TOOL. Using a power source with
voltage less than the nameplate rating is harmful to the motor.
ADDITIONAL SAFETY RULES
1. Always be sure you have a firm footing.
2. Hold the tool firmly.
3. Keep hands away from rotating parts.
4. When driving into walls, floors or wherever "live" electrical wires may be
encountered.
DO NOT TOUCH ANY METAL PARTS OF THE TOOL!
Hold the tool by the insulated grasping surfaces to prevent electric shock
if
you drive into a "live" wire.
5. Do nottouchthe bitor the workpiece immediately after operation; they may
be extremely hot and could burn your skin.
Be sure no one is below when using the tool
in high locations.
SAVE THESE INSTRUCTIONS.
4

Removing or installing a bit
CAUTION :
Always be sure that the tool is switched off and unplugged before removing or installing
the bit.
Pull the locator out of the locking sleeve while turning the locator slightly.Then grasp the
bit with
a pair of pliers and pull the bit out of the magnetic bit holder. Sometimes, it helps
to wiggle the bit with the pliers as you pull.
To install a bit, push the bit firmly into the magnetic bit holder. Then install the locator by
pushing it firmly onto the lockingsleeve while turning the locator slightly.
.
Locator 3
I
Locking sleeve 2
Bit
Magnetic bit holder
Depth adjustment
Adjust the locator by turning the locking
sleeve. One
full turn of the locking sleeve
movesthe locator
2 mm (3/32”).
Locator
Locking sleeve
Initially, adjust the locator so that the tip of the locator is flush with the base of the screw
head. Drive
a trial screw into your material or a piece of duplicate material. If the depth is
not suitable for the screw, continue adjusting until the proper depth setting
is obtained.
I II
:I- rn
m
m
I
5

Switch action
To speed is increased by increasing pres-
To start the tool, simply pull the trigger.
0
sure on the trigger. Release the trigger to
stop.
For continuous operation, pull the trigger
and then push in the lock button.
To stop
the tool from the locked position, pull the
trigger fully, then releaseit.
CAUTION:
Before plugging inthe tool, always check to see that the switch trigger actuates properly
and returnsto the "OFF" position when released.
Reversing switch action
This tool has a reversing switch to change
the direction of rotation. Move the revers-
ing switch lever to the
"+" position for
clockwise rotation or the "a" position for
counterclockwise rotation.
Reversing Clockwise
I switch lever 7 rotation
c3
Counterclockwise
I rotation
CAUTION:
.Always check the direction of rotation before operation.
*Use the reversing switch only after the tool comes to
a complete stop. Changing the
direction of rotation before the
tool stops may damage the tool
Operation
Fit the screw on the point of the bit and
place the point of the screw on the surface
of the workpiece to be fastened. Apply
pressure to the tool and start it.Withdraw
the tool as soon as the clutch cuts in.Then
releasethe trigger.
6

CAUTION:
*When fitting the screw onto the point
of the bit, becareful not to push in on the screw. If
the screw is pushed in, the clutch will engage and the screw will rotate suddenly. This
could damage aworkpiece or cause an injury.
*Make sure that the bit
is insertedstraight in the screw head, or the screw and/or bit may
bedamaged.
*Do not continue unnecessaryclutching operation
MAINTENANCE
CAUTION :
Always be sure that the tool is switched off and unplugged before attempting to perform
inspection or maintenance.
To maintain product SAFETY and RELIABILITY, repairs, maintenanceor adjustment should
be performed by Makita Authorized or Factory Service Centers, always using Makita
replacement parts.

OPTIONAL ACCESSORIES
The accessories listed in this manual are available at an extra cost from your Makita distributor or
Makitafactory service center.Service centers are listed on the warranty card packedwith your tool.
CAUTION:
These accessoriesor attachments are recommended for use with your Makita tool specified in this
manual. The use of any other accessories or attachments might present
a risk of injury to persons.
The accessoriesor attachments should be used only in the properand intended manner.
1-25
.Phillips insert bit (3per pkg.)
798313-8
Si7e I Part No
2-25
79831 2-0
*Magnetic bit holder
Part No. 784807-9
3-25 79831
4-6
8

Jan --25-'96 US
DRYWALL SCREWDRIVER
Model 6821
Note: The switch, noise suppressor and other part configurations
may differ from country to country.
9

MODEL 6821 Jan.-25--'96 US
12
13
14
15
16
18
'i\M $.& DESCRIPTION ':OM $tD DESCRIPTION
3
1
1
1
1
1
MACHINE
~
Note The Switch
Locator Complete 114"
0 Ring 22
Lock Ring
Dust Seal
Plane Bearing 14
Ring 20
Sleel Ball 3 5
Spindle
Compression Spring 6
PI" 8
Helical Gear 46
Pln 4
Thrust Needle Bearing 821
Bearing Box
Leaf Spring
Ball Bearing 608LB
Armature
and other part specifications may
~~~~
19
20
21
22
23
24
25
26
27
28
29
30
Ball Bearing 627LB
Field
Leaf Spring
Pan Head Screw 4x20 (WithWasher)
Name Plate
Housing Set (With Item 29)
Cord
Switch
Carbon Brush
Brush Holder
Housing Set (With Item 24)
Makita Label
differ fromcountry to country
10