Makita AT638A User Manual
INSTRUCTION MANUAL
MANUEL D'INSTRUCTION
MANUAL DE INSTRUCCIONES
Narrow Crown Stapler
Agrafeuse pour agrafes à dos
étroit
Engrapadora de Corona
Estrecha
AT638A
IMPORTANT: Read Before Using.
IMPORTANT : Lire avant usage.
IMPORTANTE: Lea antes de usar.
ENGLISH (Original instructions)
SPECIFICATIONS
Model: AT638A
Air pressure 0.49 - 0.83 MPa (70 - 120 PSIG)
Staple length 13 mm (1/2″) - 38 mm (1-1/2″)
Staple capacity 100 pcs.
Minimum hose diameter 6.5 mm (1/4″)
Dimensions (L x W x H) 230 mm x 75 mm x 251 mm
Net weight 1.2 kg (2.7 lbs)
• Due to our continuing program of research and development, the specications herein are subject to change
without notice.
• Specications may differ from country to country.
• Weight according to EPTA-Procedure 01/2003
(9″ x 2-15/16″ x 9-7/8″)
SAFETY WARNINGS
Important safety instructions
For personal safety and proper operation and maintenance of the tool, read this instruction manual
carefully before using the tool.
WARNING: WHEN USING THIS TOOL, BASIC
SAFETY PRECAUTIONS SHOULD ALWAYS BE
FOLLOWED TO REDUCE THE RISK OF PERSONAL
INJURY, INCLUDING THE FOLLOWING:
READ ALL INSTRUCTIONS.
Personal Protective Equipment
1. Always wear safety glasses to avoid eye injury
from dust or fasteners. The safety glasses
should conform with the requirements of ANSI
Z87.1.
WARNING:It is an employer's responsibility
to enforce the use of safety eye protection
equipment by the tool operators and by other
persons in the immediate working area.
2. Wear hearing protection to protect your ears
against exhaust noise and head protection.
Also wear light but not loose clothing. Sleeves
should be buttoned or rolled up. No necktie
should be worn.
Flammable Atmospheres
1. Do not operate tool in explosive atmospheres,
such as in the presence of ammable liquids,
gases or combustible dust.
Tool modication
1. The tool should not be modied unless autho-
rized in the tool manual or approved in writing
by the tool manufacturer.
Tool maintenance
1. Refer to the tool maintenance instructions for
detailed information on the proper maintenance of a tool.
Recommended fasteners and accessories
1. Use only fasteners made or recommended by
the tool manufacturer, or fasteners that perform equivalently to those recommended by
the manufacturer.
2. Use only accessories made or recommended
by the tool manufacturer, or accessories that
perform equivalently to those recommended
by the manufacturer.
Inspect tool before operating to:
1. Use only power source specied in the instruc-
tion manual.
Operate the tool within the specied air pressure on the tool label for safety and longer tool
life. Do not exceed the recommended max.
operating pressure. The tool should not be
connected to a source whose pressure potentially exceeds 1.38 MPa (200 PSIG).
2. Never use the tool with other than compressed
air. If bottled gas (carbon dioxide, oxygen,
nitrogen, hydrogen, air, etc.) or combustible
gas (hydrogen, propane, acetylene, etc.) is
used as a power source for this tool, the tool
will explode and cause serious injury.
3. Always check the tool for its overall condition
and loose screws before operation. Tighten as
required.
4. Make sure all safety systems are in working
order before operation. The tool must not
operate if only the trigger is pulled or if only
the contact element is pressed against the
wood. It must work only when both actions are
performed. Test for possible faulty operation
with fasteners unloaded and the contact element in fully pulled position.
5. Always check contact element as instructed in
this manual. Fasteners may be driven accidentally if the safety mechanism is not working
correctly.
Operating controls
1. Do not use a tool with missing or damaged
safety warning label(s.)
2 ENGLISH
2. A tool that is not in proper working order must
not be used. Tags and physical segregation
shall be used for control.
3. Do not remove, tamper with, or otherwise
cause tool operating controls to become
inoperable.
4. Do not operate tool if any portion of the tool
operating controls is inoperable, disconnected, altered, or not working properly.
Tool handling
1. Only persons who have read and understand
the tool operating/safety instructions should
operate the tool.
2. Always assume that tool contains fasteners.
3. Do not point tool toward yourself or anyone
whether it contains fasteners or not.
4. Keep bystanders and children away while
operating tool.
5. Do not actuate tool unless tool is placed rmly
against the workpiece.
6. Respect tool as a working implement.
7. Do not engage in horseplay.
8. Stay alert, focus on your work and use com-
mon sense when working with tools.
9. Do not use tool while tired, after having consumed drugs or alcohol, or while under the
inuence of medication.
10. Do not overreach. Keep proper footing and
balance at all times.
11. Do not hold or carry tool with a nger on the
trigger.
12. Drive fasteners into proper work surface only.
13. Do not drive fasteners into other fasteners.
14. After driving a fastener, tool may spring back
(“recoil”) causing it to move away from the
work surface. To reduce risk of injury always
manage recoil by:
a) always maintaining control of tool.
b) allowing recoil to move tool away from
work surface.
c) not resisting recoil such that tool will
be forced back into the work surface. In
“Contact Actuation Mode,” if workpiece
contact is allowed to re-contact work
surface before the trigger is released, an
unintended discharge of a fastener will
occur.
d) keeping face and body parts away from
tool.
15. When working close to an edge of a workpiece
or at steep angles use care to minimize chip-
ping, splitting or splintering, or free ight or
ricochet of fasteners, which may cause injury.
16. Keep hands and body away from fastener
discharge area of tool.
17. Do not load tool with fasteners when any one
of the operating controls is activated.
18. Do not operate tool with any power source
other than that specied in tool operating/
safety instructions.
19. Do not operate tool with any operating pres-
sure other than that specied in tool operating/
safety instructions.
20. Always select an actuation system that is
appropriate to the fastener application and the
training of the operator.
21. Use extra caution when driving fasteners into
existing walls or other blind areas to prevent
contact with hidden objects or persons on
other side (e.g., wires, pipes.)
22. Do not lift, pull or lower tool by the hose.
Disconnecting tool
Disconnect tool from the power source when:
1. Not in use;
2. Performing any maintenance or repairs;
3. Clearing a jam;
4. Elevating, lowering or otherwise moving the
tool to a new location;
5. Tool is outside of the operator’s supervision or
control; or
6. Removing fasteners from the magazine.
Additional safety instructions
1. The area should be sufciently illuminated to
assure safe operations. The area should be
clear and litter-free.
2. There may be local regulations concerning
noise which must be complied with by keeping
noise levels within prescribed limits. In certain
cases, shutters should be used to contain
noise.
3. Check walls, ceilings, oors, roong and
the like carefully to avoid possible electrical
shock, gas leakage, explosions, etc. caused by
striking live wires, conduits or gas pipes.
4. On rooftops and other high locations, drive
fasteners as you move forward. It is easy to
lose your footing if you drive fasteners while
inching backward. When driving against perpendicular surface, drive fasteners from the
top to the bottom. You can perform the operations with less fatigue by doing so.
5. Do not leave the loaded tool or the air compressor under pressure for a long time out in
the sun. Be sure that dust, sand, chips and
foreign matter will not enter the tool in the
place where you leave it setting.
6. Perform cleaning and maintenance right after
nishing the job. Keep the tool in tip-top condition. Lubricate moving parts to prevent rusting
and minimize friction-related wear. Wipe off all
dust from the parts.
7. Do not disconnect the air hose with a nger
on the trigger. An unexpected driving will cause
serious injury when the air hose is connected.
8. When you drop or strike the tool, check the
tool damage or crack and make sure that
safety systems are in working order before
operation. As there is high pressure inside the
tool, failure to do so will cause serious injury.
9. Ask Makita's Authorized service centers for
periodical inspection of the tool.
10. To maintain product SAFETY and RELIABILITY,
maintenance and repairs should be performed
by Makita Authorized or Factory Service
Centers, always using Makita replacement
parts.
SAVE THESE INSTRUCTIONS.
3 ENGLISH
WARNING: MISUSE or failure to follow the
safety rules stated in this instruction manual may
cause serious personal injury.
Symbols
The followings show the symbols used for tool.
Read and understand tool labels and manual. Failure to follow warnings could result
in death or serious injury.
Operators and others in work area must
wear safety glasses with side shields.
Keep ngers away from trigger when
not driving fasteners to avoid accidental
discharge.
PARTS DESCRIPTION
4
1
2
► 1. Trigger 2. Nose adapter (contact element)
3. Hook 4. Magazine
3
INSTALLATION
Selecting compressor
2.5
2
1.5
2
1
0.5
20 30 40 50
100
1
1. Stapling frequency (times/min) 2. Compressor air
output per minute (CFM (ft3 /min.)) 3. 0.83 MPa (120
PSIG) 4. 0.66 MPa (95 PSIG) 5. 0.49 MPa (70 PSIG)
The air compressor must comply with the requirements
of ANSI B19.3.
Select a compressor that has ample pressure and air
output to assure cost-efcient operation. The graph
shows the relation between stapling frequency, applica-
ble pressure and compressor air output.
Thus, for example, if stapling takes place at a rate of
approximately 50 times per minute at a compression of
0.83 MPa (120 PSIG), a compressor with an air output
over 1.5 CFM ( ft
Pressure regulators must be used to limit air pressure to
the rated pressure of the tool where air supply pressure
exceeds the tool's rated pressure. Failure to do so may
result in serious injury to tool operator or persons in the
vicinity.
3
/minute) is required.
Selecting air hose
CAUTION: Low air output of the compressor,
or a long or smaller diameter air hose in relation
to the stapling frequency may cause a decrease in
the driving capability of the tool.
3
4
5
4 ENGLISH
Use an air hose as large and as short as possible to
assure continuous, efcient stapling operation.
With an air pressure of 0.49 MPa (70 PSIG), an air hose
with an internal diameter of over 6.5 mm (1/4″) and a
length of less than 20 m (6.6 ft.) is recommended when
the interval between each stapling is 0.5 seconds.
Air supply hoses shall have a minimum working pressure rating of 1.03 MPa (150 PSIG) or 150 percent of
the maximum pressure produced in the system whichever is higher.
Lubrication
To insure maximum performance, install an air set (oiler,
regulator, air lter) as close as possible to the tool.
Adjust the oiler so that one drop of oil will be provided
for every 50 staples.
When an air set is not used, oil the tool with pneumatic
tool oil by placing 2 (two) or 3 (three) drops into the air
tting. This should be done before and after use.
For proper lubrication, the tool must be red a couple of
times after pneumatic tool oil is introduced.
1
FUNCTIONAL
DESCRIPTION
CAUTION: Before adjusting or checking
function on the tool, always return the trigger and
disconnect the air hose from the tool.
Adjusting depth of stapling
1
B
A
► 1. Adjuster
To adjust the depth of stapling, turn the adjuster.
The depth of stapling is the deepest when the adjuster
is turned fully in the A direction shown in the gure. It will
become shallower as the adjuster is turned in the B direction.
If staples cannot be driven deep enough even when the
adjuster is turned fully in the A direction, increase the
air pressure.
If staples are driven too deep even when the adjuster is
turned fully in the B direction, decrease the air pressure.
Generally speaking, the tool service life will be longer
when the tool is used with lower air pressure and the
adjuster set to deeper depth of staple driving.
Hook
CAUTION: Never hook the tool at high loca-
tion or on potentially unstable surface.
CAUTION: Do not hang the hook from the
waist belt. If the stapler accidentally drops, it may
result in misring and personal injuries.
► 1. Pneumatic tool oil
1
► 1. Hook
The hook is convenient for hanging the tool temporarily.
5 ENGLISH
Air duster
CAUTION: Do not aim the ejection port of the
air duster to someone. Also, keep your hands and
foot away from the ejection port. If the air duster
button is accidentally pushed, it may cause a personal injury.
CAUTION: Always check your surroundings
before using the air duster. Blown dust or objects
may hit someone.
CAUTION: Do not connect or disconnect the
air hose while pushing the air duster button.
The air supplied to the tool can also be used as an air
duster. You can clean the work area by pressing the
button on the grip end.
1
2
1
► 1. Lever 2. Sliding door
2. Insert a strip of staples into the opening of the
magazine all the way.
► 1. Button
NOTICE: After using the air duster, the driving force
of the tool will temporarily decline. Wait until the air
pressure recovers in this case.
NOTICE: Perform a test blow if you use the air
duster immediately after the oil was applied. The oil
may be sprayed with the air.
ASSEMBLY
CAUTION: Before carrying out any work on
the tool, always return the trigger and disconnect
the air hose from the tool.
CAUTION: Load the same type, size and
uniform length of staples when loading multiple
strips of staples in the magazine.
Loading stapler
NOTE: Always hold the rear of the sliding door when
you press the lever. The sliding door opens suddenly
with the lever pressed when staples are stored in the
magazine.
1. Press the lever and open the sliding door of the
magazine.
3. Close the sliding door until the sliding door is
locked.
Removing staples
To remove staples, follow the procedures of “Loading
stapler” in reverse.
Nose adapter
To prevent the surface of workpiece from being
scratched or damaged, use the nose adapter.
6 ENGLISH
OPERATION
CAUTION: Make sure all safety systems are in
working order before operation.
2
Selecting the operation mode
1
► 1. Nose adapter 2. Contact element
A spare nose adapter is stored in the place shown in
the gure.
1
► 1. Spare nose adapter
Connecting air hose
CAUTION: Always make sure that the actua-
tion mode selector is properly set to the position
for the desired stapling mode before stapling.
1
► 1. Actuation mode selector
Single sequential actuation mode:
You can drive one staple by one sequential operation.
Select this mode when driving a staple carefully and
accurately.
To choose this mode, set the actuation mode selector to
the
position.
Contact actuation mode:
You can drive staples repetitively by placing the contact
element with the trigger held.
To choose this mode, set the actuation mode selector to
position.
the
Single sequential actuation
Place the contact element against the workpiece and
pull the trigger fully.
After stapling, release the contact element, and then
release the trigger.
1
► 1. Air tting 2. Air socket
Slip the air socket of the air hose onto the air tting on
the stapler. Be sure that the air socket locks rmly into
position when installed onto the air tting.
A hose coupling must be installed on or near the tool in
such a way that the pressure reservoir will discharge at
the time the air supply coupling is disconnected.
2
2
1
7 ENGLISH
CAUTION: Do not place the contact element
against the workpiece with excessive force. Also,
pull the trigger fully and hold it on for 1-2 seconds
after stapling.
Even in the “Single sequential actuation” mode, halfpulled trigger causes an unexpected stapling, when
the contact element re-contacts the workpiece.
Contact actuation
Pull the trigger rst and then place the contact element
against the workpiece.
1
2
Empty indicator
When the remaining number of staples in the magazine
becomes low, the empty indicator turns to red. Reload
the staples when the empty indicator becomes red.
Follow the procedure of “Removing staples” to remove
the strip of staples, and remove jammed staples from
the staple rail.
MAINTENANCE
CAUTION: Before attempting to perform
inspection or maintenance, always return the trigger and disconnect the air hose from the tool.
NOTICE: Never use gasoline, benzine, thinner,
alcohol or the like. Discoloration, deformation or
cracks may result.
Staples
Handle staple strips and their box carefully. If the staple
strips have been handled roughly, they may be out of
shape, causing poor staple feed.
Avoid storing staples in a very humid or hot place or
place exposed to direct sunlight.
Maintenance of stapler
Always check the tool for its overall condition and loose
screws before operation. Tighten as required.
With tool disconnected, make daily inspection to assure
free movement of the contact element and trigger. Do
not use tool if the contact element or trigger sticks or
binds.
When the tool is not to be used for an extended period
of time, lubricate the tool using pneumatic tool oil and
store the tool in a safe place. Avoid exposure to direct
sunlight and/or humid or hot environment.
1
► 1. Empty indicator
Removing jammed staples
CAUTION: Always return the trigger and
disconnect the hose before removing jammed
staples.
CAUTION: Do not use deformed staples or
strip of staples. Failure to do so causes poor staple
feeding.
NOTE: Always hold the rear of the sliding door when
you press the lever. The sliding door opens suddenly
with the lever pressed when staples are stored in the
magazine.
Maintenance of compressor, air set
and air hose
After operation, always drain the compressor tank and
the air lter. If moisture is allowed to enter the tool,
it may result in poor performance and possible tool
failure.
8 ENGLISH
1
► 1. Drain cock
1
► 1. Air lter
Check regularly to see if there is sufcient pneumatic
oil in the oiler of the air set. Failure to maintain sufcient
lubrication will cause O-rings to wear quickly.
1
2
► 1. Oiler 2. Pneumatic oil
Keep the air hose away from heat (over 60°C, over
140°F), away from chemicals (thinner, strong acids or
alkalis). Also, route the hose away from obstacles which
it may become dangerously caught on during operation.
Hoses must also be directed away from sharp edges
and areas which may lead to damage or abrasion to
the hose.
To maintain product SAFETY and RELIABILITY,
repairs, any other maintenance or adjustment should
be performed by Makita Authorized or Factory Service
Centers, always using Makita replacement parts.
OPTIONAL
ACCESSORIES
CAUTION: These accessories or attachments
are recommended for use with your Makita tool
specied in this manual. The use of any other
accessories or attachments might present a risk of
injury to persons. Only use accessory or attachment
for its stated purpose.
If you need any assistance for more details regard-
ing these accessories, ask your local Makita Service
Center.
• Staples
• Air hose
• Safety goggles
NOTE: Some items in the list may be included in the
tool package as standard accessories. They may
differ from country to country.
MAKITA LIMITED ONE YEAR
WARRANTY
Warranty Policy
Every Makita tool is thoroughly inspected and tested
before leaving the factory. It is warranted to be free of
defects from workmanship and materials for the period
of ONE YEAR from the date of original purchase.
Should any trouble develop during this one year period,
return the COMPLETE tool, freight prepaid, to one
of Makita’s Factory or Authorized Service Centers. If
inspection shows the trouble is caused by defective
workmanship or material, Makita will repair (or at our
option, replace) without charge.
This Warranty does not apply where:
• repairs have been made or attempted by others:
• repairs are required because of normal wear and
tear:
• the tool has been abused, misused or improperly
maintained:
• alterations have been made to the tool.
IN NO EVENT SHALL MAKITA BE LIABLE FOR ANY
INDIRECT, INCIDENTAL OR CONSEQUENTIAL
DAMAGES FROM THE SALE OR USE OF THE
PRODUCT. THIS DISCLAIMER APPLIES BOTH
DURING AND AFTER THE TERM OF THIS
WARRANTY.
MAKITA DISCLAIMS LIABILITY FOR ANY IMPLIED
WARRANTIES, INCLUDING IMPLIED WARRANTIES
OF "MERCHANTABILITY" AND "FITNESS FOR A
SPECIFIC PURPOSE," AFTER THE ONE YEAR TERM
OF THIS WARRANTY.
This Warranty gives you specic legal rights, and you
may also have other rights which vary from state to
state. Some states do not allow the exclusion or lim-
itation of incidental or consequential damages, so the
above limitation or exclusion may not apply to you.
Some states do not allow limitation on how long an
implied warranty lasts, so the above limitation may not
apply to you.
9 ENGLISH
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