Makita 6924N User manual

INSTRUCTION MANUAL
Shear Wrench
6924N
ENGLISH: Original instructions
DOUBLE INSULATION
Read before use.

2ENGLISH
SPECIFICATIONS
Model 6924N
Bolt size M22, M24
Max. normal torque 1,100 N•m
No load speed (min-1)19
Dimensions (L×W×H) 330 mm × 104 mm × 257 mm
Net weight 7.5 kg
Safety class /II
• Duetoourcontinuingprogramofresearchanddevelopment,thespecicationshereinaresubjecttochange
without notice.
• Specicationsmaydifferfromcountrytocountry.
• Weight according to EPTA-Procedure 01/2014
Symbols
The following show the symbols used for the equipment.
Be sure that you understand their meaning before use.
Read instruction manual.
DOUBLE INSULATION
Only for EU countries
Do not dispose of electric equipment
together with household waste material!
In observance of the European Directive,
on Waste Electric and Electronic
Equipment and its implementation in
accordance with national law, electric
equipment that have reached the end of
their life must be collected separately and
returned to an environmentally compatible
recycling facility.
Intended use
The tool is intended for fastening “tor-shear type” high
tensile bolts.
Power supply
The tool should be connected only to a power supply of
the same voltage as indicated on the nameplate, and
can only be operated on single-phase AC supply. They
are double-insulated and can, therefore, also be used
from sockets without earth wire.
General power tool safety warnings
WARNING: Read all safety warnings, instruc-
tions, illustrations and specications provided
with this power tool. Failure to follow all instructions
listedbelowmayresultinelectricshock,reand/or
seriousinjury.
Save all warnings and instruc-
tions for future reference.
The term "power tool" in the warnings refers to your
mains-operated (corded) power tool or battery-operated
(cordless) power tool.
Work area safety
1. Keep work area clean and well lit. Cluttered or
dark areas invite accidents.
2. Do not operate power tools in explosive atmo-
spheres, such as in the presence of ammable
liquids, gases or dust. Power tools create sparks
which may ignite the dust or fumes.
3. Keep children and bystanders away while
operating a power tool. Distractions can cause
you to lose control.
Electrical Safety
1. 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. Unmodiedplugsandmatchingoutletswill
reduce risk of electric shock.
2. Avoid body contact with earthed or grounded
surfaces, such as pipes, radiators, ranges and
refrigerators. There is an increased risk of elec-
tric shock if your body is earthed or grounded.
3. Do not expose power tools to rain or wet con-
ditions. Water entering a power tool will increase
the risk of electric shock.
4. 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.
5. When operating a power tool outdoors, use an
extension cord suitable for outdoor use. Use of
a cord suitable for outdoor use reduces the risk of
electric shock.
6. If operating a power tool in a damp location
is unavoidable, use a residual current device
(RCD) protected supply. Use of an RCD reduces
the risk of electric shock.
7. Use of power supply via an RCD with a rated
residual current of 30 mA or less is always
recommended.
8. Power tools can produce electromagnetic
elds (EMF) that are not harmful to the user.
However, users of pacemakers and other similar
medical devices should contact the maker of their
device and/or doctor for advice before operating
this power tool.
9. Do not touch the power plug with wet hands.
10. If the cord is damaged, have it replaced by the
manufacturer or his agent in order to avoid a
safety hazard.

3ENGLISH
Personal Safety
1. 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 inuence of drugs, alcohol or med-
ication. A moment of inattention while operating
powertoolsmayresultinseriouspersonalinjury.
2.
Use personal protective equipment. Always wear eye
protection. Protective equipment such as a dust mask,
non-skid safety shoes, hard hat or hearing protection used
forappropriateconditionswillreducepersonalinjuries.
3. 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ngerontheswitchorenergisingpowertools
that have the switch on invites accidents.
4.
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.
5. Do not overreach. Keep proper footing and
balance at all times. This enables better control
of the power tool in unexpected situations.
6. Dress properly. Do not wear loose clothing or
jewellery. Keep your hair and clothing away
from moving parts.Looseclothes,jewelleryor
long hair can be caught in moving parts.
7. 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.
8.
Do not let familiarity gained from frequent use
of tools allow you to become complacent and
ignore tool safety principles. A careless action can
causesevereinjurywithinafractionofasecond.
9. Always wear protective goggles to protect your eyes
from injury when using power tools.The goggles
must comply with ANSI Z87.1 in the USA, EN 166 in
Europe, or AS/NZS 1336 in Australia/New Zealand. In
Australia/New Zealand, it is legally required to wear
a face shield to protect your face, too.
It is an employer's responsibility to enforce
the use of appropriate safety protective equip-
ments by the tool operators and by other per-
sons in the immediate working area.
Power tool use and care
1. 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.
2.
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.
3. Disconnect the plug from the power source
and/or remove the battery pack, if detachable,
from the power tool before making any adjust-
ments, changing accessories, or storing power
tools. Such preventive safety measures reduce
the risk of starting the power tool accidentally.
4.
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.
5. Maintain power tools and accessories. Check for
misalignment or binding of moving parts, break-
age 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.
6. Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges
are less likely to bind and are easier to control.
7. Use the power tool, accessories and tool bits
etc. in accordance with these instructions, tak-
ing into account the working conditions and
the work to be performed. Use of the power tool
for operations different from those intended could
result in a hazardous situation.
8. Keep handles and grasping surfaces dry,
clean and free from oil and grease. Slippery
handles and grasping surfaces do not allow for
safe handling and control of the tool in unexpected
situations.
9. When using the tool, do not wear cloth work
gloves which may be entangled. The entangle-
ment of cloth work gloves in the moving parts may
resultinpersonalinjury.
Service
1. Have your power tool serviced by a qualied
repair person using only identical replacement
parts. This will ensure that the safety of the power
tool is maintained.
2. Follow instruction for lubricating and chang-
ing accessories.
SHEAR WRENCH SAFETY RULES
1. Hold the power tool by insulated gripping
surfaces, when performing an operation where
the fastener may contact hidden wiring or its
own cord. Fasteners contacting a "live" wire may
make exposed metal parts of the power tool "live"
and could give the operator an electric shock.
2.
Before using power tool, make sure that the outer
sleeve smoothly turns by hand. When it does
not smoothly turn, never use it and ask MAKITA
Authorized Service Center for check and repair.
3. When sheared bolt tip falls without moving tip
ejector (tip lever), never use it and ask MAKITA
Authorized Service Center for check and repair.
4. Always be sure you maintain good balance
and rm footing.
Be sure no one is below when using the tool in
high or elevated locations.
5. Hold the tool rmly.

4ENGLISH
6.
Use care and common sense when disposing
of sheared bolt tips. Falling tips from high loca-
tions or scattered tips can cause severe injury.
SAVE THESE INSTRUCTIONS.
WARNING: DO NOT let comfort or famil-
iarity with product (gained from repeated
use) replace strict adherence to shear
wrench safety rules for the subject product.
MISUSE or failure to follow the safety rules
stated in this instruction manual may cause
serious personal injury.
FUNCTIONAL
DESCRIPTION
CAUTION:
• Always be sure that the tool is switched off and
unpluggedbeforeadjustingorcheckingfunction
on the tool.
Switch action
1
►1. Switch trigger
CAUTION:
• Before plugging in the tool, always check to see
that the switch trigger actuates properly and
returns to the "OFF" position when released.
To start the tool, simply pull the switch trigger. Release
the switch trigger to stop.
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and
unplugged before carrying out any work on the
tool.
Removing the outer and inner sleeves
1
2
►1. Outer sleeve 2. Screw
CAUTION:
• Be careful not to allow foreign matter to enter
the insides of the tool when removing or install-
ing the outer and inner sleeves.
The outer sleeve M24 and inner sleeve M24 are factory - installed. If
you need other sizes for your work, replace the sleeves as follows.
Loosen the two screws while holding the outer sleeve.
The outer and inner sleeves will be pushed up by the
springs built into the tool.
Press the pin down to remove the inner sleeve from the
outer sleeve. Be careful not to drop the inner sleeve
when removing it. Do not remove the inner sleeve
spring, tip rod and tip rod spring from the tool.
1
2
3
►1. Inner sleeve 2. Pin 3. Outer sleeve
1
2
3
►1. Tip rod 2. Tip rod spring 3. Inner sleeve spring

5ENGLISH
Installing the outer and inner
sleeves
Hold the inner sleeve with the pin facing upward. Place
the outer sleeve over the inner sleeve. Press the pin to
allow inserting the inner sleeve, then release the pin to
secure the inner sleeve.
1
2
3
►1. Outer sleeve 2. Pin 3. Inner sleeve
Insert the outer and inner sleeves into the tool while
rotating the inner sleeve alternately clockwise and
counterclockwise until there is no gap between the
outersleeveandthetool.Seethegure.Thentighten
the two screws securely.
1
32
4
►1. There should be no gap between the outer
sleeve and the tool. 2. Inner sleeve 3. Outer sleeve
4. Screw
OPERATION
Bolt installation
Slip the tool onto the bolt so that the inner sleeve com-
pletely covers the bolt tip.
1
2
►1. Inner sleeve 2. Bolt tip
CAUTION:
• Becarefulwhenttingthesleeveontothebolt
tip. Striking the tip can damage it so that it will
nolongertinsidethesleeveproperly.
• First tighten bolts preliminarily by using a hand
wrench and then tighten them with this tool. Use
this tool only after preliminary tightening without
starting the tightening with this tool.
Keep forward pressure on the tool while sliding it further
forwarduntiltheoutersleevetscompletelyoverthe
nut.Ifthetoolfailstotcompletelyoverthenut,twist
the tool slightly right and left while pushing forward.
1
2
►1. Outer sleeve 2. Nut

6ENGLISH
Pull the switch trigger. The outer sleeve turns to begin
tightening the nut.
Whenthespeciedtorqueisattained,thebolttipwillbe
sheared at its notched portion. The bolt tip will remain
inside the inner sleeve.
1
2
►1. Notched portion 2. Bolt tip
Release the switch trigger and withdraw the tool in a
straight line.
1
►1. Outer sleeve
CAUTION:
• Do not force the tool down excessively. Apply
thedownwardforcetothedegreejustneededto
holdthetoolrm.
Pullthetipejector(tiplever)toejectthebolttipfrom
the tool. Catch the sheared bolt tips to prevent them
from falling dangerously below. Keep the tips off of
theground,oor,walkways,etc.topreventinjuryfrom
tripping or falling.
1
►1. Bolt tip
1
►1.Tipejector(Tiplever)
CAUTION:
• Washer and nut have head and tail. Head has
identicationmarkfornutandchamferfor
washer. When placing them, be careful not to
place in reverse.
1
23
4
5
►1.Identicationmark2. Nut 3. Bolt 4. Chamfered
5. Washer
CAUTION:
• Replace nut, bolt and washer all together at one
time when these rotate together, nut rotates
excessively or a bolt protrude from nut surface
too much or less.
• Do not reuse used nut, bolt and washer.
• Choose shear bolts according to the thickness
of workpiece to be fastened. Range for the
remaining length of bolts that are obtained after
cutting off chips are determined by bolt size.
Refer to the table below for details.
Bolt size
M22
M24
Maximum
remainig
length
Minimum
remainig
length
26mm 7mm
23mm 10mm

7ENGLISH
1
►1. Remaining length
CAUTION:
• Use bolts with the remaining length within the
range shown in the table above as bolts with
different size have different maximum and min-
imum remaining length. Be careful not to use
boltsbeyondthespeciedrangewhichcauses
the tool damage
MAINTENANCE
CAUTION:
• Always be sure that the tool is switched off and
unplugged before attempting to perform inspec-
tion or maintenance.
• Never use gasoline, benzine, thinner, alcohol
or the like. Discoloration, deformation or cracks
may result.
Replacing carbon brushes
1
►1. Limit mark
Remove and check the carbon brushes regularly.
Replace when they wear down to the limit mark. Keep
the carbon brushes clean and free to slip in the holders.
Both carbon brushes should be replaced at the same
time. Use only identical carbon brushes.
Use a screwdriver to remove the brush holder caps.
Take out the worn carbon brushes, insert the new ones
and secure the brush holder caps.
2
1
►1. Screwdriver 2. Brush holder cap
To maintain product SAFETY and RELIABILITY, repairs,
anyothermaintenanceoradjustmentshouldbeper-
formed by Makita Authorized Service Centers, always
using Makita replacement parts.
OPTIONAL
ACCESSORIES
CAUTION:
• These accessories or attachments are recom-
mendedforusewithyourMakitatoolspecied
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.
Sleeve Bolt size Length (mm)
Outer sleeve M22 49
Inner sleeve M22 48
Outer sleeve M24 49
Inner sleeve M24 49
Outer sleeve 7/8" 49
Inner sleeve 7/8" 48
Outer sleeve 1" 49
Inner sleeve 1" 49
NOTE:
• Some items in the list may be included in the
tool package as standard accessories. They
may differ from country to country.

Makita Corporation
www.makita.com
884567D4
EN
20180110