DeWalt DCS312NT-XJ User manual

DCS312
Final page size: A5 (148mm x 210mm)

B
Copyright
DeWALT
English (original instructions)
3

1
Fig. A
Fig. B
6
7
8
3
4
9
5
2
1
7
6
6
12
7
10
XXXX XX XX

2
Fig. E Fig. F
Fig. C Fig. D
Fig. G Fig. H
8 5
2
1
1
2
3
11

ENGLISH
3
The vibration and/or noise emission level given in this
information sheet has been measured in accordance with
a standardised test given in EN62841 and may be used to
compare one tool with another. It may be used for a preliminary
assessment ofexposure.
WARNING: The declared vibration and/or noise emission
level represents the main applications of the tool. However
if the tool is used for different applications, with different
accessories or poorly maintained, the vibration and/or
noise emission may differ. This may significantly increase
the exposure level over the total workingperiod.
An estimation of the level of exposure to vibration and/or
noise should also take into account the times when the tool
is switched off or when it is running but not actually doing
the job. This may significantly reduce the exposure level
over the total workingperiod.
Identify additional safety measures to protect the operator
from the effects of vibration and/or noise such as: maintain
the tool and the accessories, keep the hands warm
(relevant for vibration), organisation of workpatterns.
WARNING: To reduce the risk of injury, read the
instructionmanual.
Definitions: Safety Guidelines
The definitions below describe the level of severity for each
signal word. Please read the manual and pay attention to
thesesymbols.
DANGER: Indicates an imminently hazardous
situation which, if not avoided, will result in death or
seriousinjury.
WARNING: Indicates a potentially hazardous situation
which, if not avoided, could result in death or
seriousinjury.
CAUTION: Indicates a potentially hazardous situation
which, if not avoided, may result in minor or
moderateinjury.
NOTICE: Indicates a practice not related to
personal injury which, if not avoided, may result in
propertydamage.
Denotes risk of electricshock.
Denotes risk offire.
EC-Declaration of Conformity
Machinery Directive
Reciprocating Sabre Saw
DCS312
DeWALT
declares that these products described under
Technical Data are in compliance with:
2006/42/EC, EN62841-1:2015, EN62841-2-11:2016.
These products also comply with Directive 2014/30/EU and
2011/65/EU. For more information, please contact
DeWALT
at
the following address or refer to the back of themanual.
The undersigned is responsible for compilation of the technical
file and makes this declaration on behalf of
DeWALT
.
Markus Rompel
Vice President of Engineering, PTE-Europe
DeWALT
, Richard-Klinger-Straße 11,
D-65510, Idstein, Germany
20.01.2020
DCS312
Voltage VDC 12
Type 1
Battery type Li-Ion
No-load speed min-1 0–2800
Stroke length mm 16
Cutting capacity in wood/metal profiles/plastic tubes mm 90/40/90
Weight (without battery pack) kg 1.38
Noise values and/or vibration values (triax vector sum) according to
EN62841-2-11:
LPA (emission sound pressure level) dB(A) 84
LWA (sound power level) dB(A) 95
K (uncertainty for the given sound level) dB(A) 3
While cutting board
Vibration emission value ah,
B
=m/s25.7
Uncertainty K = m/s21.6
English (original instructions)
Congratulations!
You have chosen a
DeWALT
tool. Years of experience, thorough
product development and innovation make
DeWALT
one of the
most reliable partners for professional power toolusers.
Technical Data
RECIPROCATING SABRE SAW
DCS312

4
ENGLISH
GENERAL POWER TOOL SAFETY WARNINGS
WARNING: 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.
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.
1) Work Area Safety
a ) Keep work area clean and well lit. Cluttered or dark
areas inviteaccidents.
b ) 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.
c ) Keep children and bystanders away while operating
a power tool. Distractions can cause you to losecontrol.
2) Electrical Safety
a ) 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.
b ) Avoid body contact with earthed or grounded
surfaces, such as pipes, radiators, ranges and
refrigerators. There is an increased risk of electric shock if
your body is earthed orgrounded.
c ) Do not expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of
electricshock.
d ) 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.
e ) 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.
f ) 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.
3) Personal Safety
a ) 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.
b ) 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.
c ) 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 energising power tools that have the switch on
invitesaccidents.
d ) 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.
e ) Do not overreach. Keep proper footing and balance
at all times. This enables better control of the power tool
in unexpectedsituations.
f ) 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.
g ) 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.
h ) 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.
4) Power Tool Use and Care
a ) 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.
b ) 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.
c ) Disconnect the plug from the power source and/
or remove the battery pack, if detachable, from
Batteries Chargers/Charge Times (Minutes)
Cat # VDC Ah
Weight
kg DCB104 DCB107 DCB110 DCB112 DCB113 DCB115 DCB116 DCB132 DCB119
DCB122 12 2.0 0.22 30 90 90 60 50 30 30 30 60
DCB124/G 12 3.0 0.25 45 140 140 90 70 45 45 45 90
DCB125 12 1.3 0.20 22 60 60 40 30 22 22 22 40
DCB126/G 12 5.0 0.22 75 240 240 150 120 75 75 75 150
DCB127 12 2.0 0.20 30 90 90 60 50 30 30 30 60
Batteries
Chargers/Charge Times (Minutes)
Cat #
DC
Weight
*Date code 201811475B or later
**Date code 201536 or later

5
ENGLISH
Additional Safety Instructions for
Reciprocating Saws
• Hold power tool by insulated gripping surfaces when
performing an operation where the cutting accessory
may contact hidden wiring. Cutting accessory contacting
a “live” wire will make exposed metal parts of the power tool
“live” and could give the operator an electricshock.
• Use clamps or another practical way to secure and
support the workpiece to a stable platform. Holding the
work by hand or against your body leaves it unstable and may
lead to loss of control.
• ALWAYS wear a dust mask. Exposure to dust particles can
cause breathing difficulty and possibleinjury.
• Never switch on the tool when the saw blade is jammed in the
workpiece or in contact with thematerial.
• Keep hands away from moving parts. Never place your
hands near the cuttingarea.
• Use extra caution when cutting overhead and pay
particular attention to overhead wires which may be
hidden from view. Anticipate the path of falling branches
and debris ahead oftime.
• Do not operate this tool for long periods of time.
Vibration caused by the operating action of this tool may
cause permanent injury to fingers, hands, and arms. Use
gloves to provide extra cushion, take frequent rest periods, and
limit daily time ofuse.
Switching On and Off
• After switching off, never attempt to stop the saw blade with
yourfingers.
• Never put the saw down on a table or work bench unless
switched off. The saw blade will keep running briefly after the
tool has been switchedoff.
When Sawing
• When using saw blades specially designed for cutting wood
remove all nails and metal objects from the workpiece before
startingwork.
• Wherever possible, use clamps and vices to fasten the
workpiecesecurely.
• Do not attempt to saw extremely smallworkpieces.
• Do not bend too far forward. Make sure that you always stand
firmly, particularly on scaffolding andladders.
• Always hold the saw with bothhands.
• For cutting curves and pockets, use an adapted sawblade.
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.
d ) 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.
e ) Maintain power tools and accessories. 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.
f ) Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges are less
likely to bind and are easier tocontrol.
g ) 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 different
from those intended could result in a hazardoussituation.
h ) 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.
5) Battery Tool Use and Care
a ) Recharge only with the charger specified by the
manufacturer. A charger that is suitable for one type
of battery pack may create a risk of fire when used with
another batterypack.
b ) Use power tools only with specifically designated
battery packs. Use of any other battery packs may create
a risk of injury andfire.
c ) 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.
d ) 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.
e ) Do not use a battery pack or tool that is damaged
or modified. Damaged or modified batteries may exhibit
unpredictable behaviour resulting in fire, explosion or risk
of injury.
f ) Do not expose a battery pack or tool to fire or
excessive temperature. Exposure to fire or temperature
above 130 °C may causeexplosion.
g ) Follow all charging instructions and do not charge
the battery pack or tool outside the temperature
range specified in the instructions. Charging
improperly or at temperatures outside the specified range
may damage the battery and increase the risk of fire.
6) Service
a ) 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.
b ) Never service damaged battery packs. Service
of battery packs should only be performed by the
manufacturer or authorized service providers.

6
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Chargers
DeWALT
chargers require no adjustment and are designed to be
as easy as possible tooperate.
Electrical Safety
The electric motor has been designed for one voltage only.
Always check that the battery pack voltage corresponds to the
voltage on the rating plate. Also make sure that the voltage of
your charger corresponds to that of yourmains.
Your
DeWALT
charger is double insulated in
accordance with EN60335; therefore no earth wire
isrequired.
If the supply cord is damaged, it must be replaced by a
specially prepared cord available through the
DeWALT
serviceorganisation.
Mains Plug Replacement
(U.K. & Ireland Only)
If a new mains plug needs to be fitted:
• Safely dispose of the oldplug.
• Connect the brown lead to the live terminal in theplug.
• Connect the blue lead to the neutralterminal.
WARNING: No connection is to be made to the
earthterminal.
Follow the fitting instructions supplied with good quality plugs.
Recommended fuse: 3A.
Using an Extension Cable
An extension cord should not be used unless absolutely
necessary. Use an approved extension cable suitable for
the power input of your charger (see Technical Data). The
minimum conductor size is 1mm2; the maximum length
is30m.
When using a cable reel, always unwind the cablecompletely.
Residual Risks
In spite of the application of the relevant safety regulations
and the implementation of safety devices, certain residual risks
cannot be avoided. These are:
• Impairment ofhearing.
• Risk of personal injury due to flyingparticles.
• Risk of burns due to accessories becoming hot
duringoperation.
• Risk of personal injury due to prolongeduse.
SAVE THESE INSTRUCTIONS
Checking and Changing the Saw Blade
• Only use saw blades conforming to the specifications
contained in these operatinginstructions.
• Only sharp saw blades in perfect working condition should
be used; cracked or bent saw blades should be discarded and
replaced atonce.
• Ensure that the saw blade is securelyfixed.
Important Safety Instructions for All Battery
Chargers
SAVE THESE INSTRUCTIONS: This manual contains important
safety and operating instructions for compatible battery
chargers (refer to TechnicalData).
• Before using charger, read all instructions and cautionary
markings on charger, battery pack, and product using
batterypack.
WARNING: Shock hazard. Do not allow any liquid to get
inside charger. Electric shock mayresult.
WARNING: We recommend the use of a residual current
device with a residual current rating of 30mA orless.
CAUTION: Burn hazard. To reduce the risk of injury,
charge only
DeWALT
rechargeable batteries. Other types of
batteries may burst causing personal injury anddamage.
CAUTION: Children should be supervised to ensure that
they do not play with theappliance.
NOTICE: Under certain conditions, with the charger
plugged into the power supply, the exposed charging
contacts inside the charger can be shorted by foreign
material. Foreign materials of a conductive nature such
as, but not limited to, steel wool, aluminum foil or any
buildup of metallic particles should be kept away from
charger cavities. Always unplug the charger from the
power supply when there is no battery pack in the cavity.
Unplug charger before attempting to clean
• DO NOT attempt to charge the battery pack with any
chargers other than the ones in this manual. The charger
and battery pack are specifically designed to worktogether.
• These chargers are not intended for any uses other than
charging
DeWALT
rechargeable batteries. Any other uses
may result in risk of fire, electric shock orelectrocution.
• Do not expose charger to rain orsnow.
• Pull by plug rather than cord when disconnecting
charger. This will reduce risk ofdamage to electric plug
andcord.
• Make sure that cord is located so that it will not be
stepped on, tripped over, or otherwise subjected to
damage orstress.
• Do not use an extension cord unless it is absolutely
necessary. Use of improper extension cord could result in risk
of fire,electric shock, orelectrocution.
• Do not place any object on top of charger or place
the charger on a soft surface that might block the
ventilation slots and result in excessive internal heat.
Place the charger in a position away from any heat source. The
charger is ventilated through slots in the top and the bottom
of thehousing.
• Do not operate charger with damaged cord or plug—
have them replacedimmediately.
• Do not operate charger if it has received a sharp blow,
been dropped, or otherwise damaged in any way. Take it
to an authorised servicecentre.
• Do not disassemble charger; take it to an authorised
service centre when service or repair is required. Incorrect

7
ENGLISH
Battery Packs
Important Safety Instructions for All Battery
Packs
When ordering replacement battery packs, be sure to include
catalogue number and voltage.
The battery pack is not fully charged out of the carton. Before
using the battery pack and charger, read the safety instructions
below. Then follow charging procedures outlined.
READ ALL INSTRUCTIONS
• Do not charge or use battery in explosive atmospheres,
such as in the presence of flammable liquids, gases or
dust. Inserting or removing the battery from the charger may
ignite the dust or fumes.
• Never force battery pack into charger. Do not modify
battery pack in any way to fit into a non-compatible
charger as battery pack may rupture causing serious
personal injury.
• Charge the battery packs only in
DeWALT
chargers.
• DO NOT splash or immerse in water or other liquids.
• Do not store or use the tool and battery pack in
locations where the temperature may reach or exceed
40 ˚C (104 ˚F) (such as outside sheds or metal buildings
in summer).
A cold battery pack will charge at a slower rate than a warm
battery pack. The battery pack will charge at that slower rate
throughout the entire charging cycle and will not return to
maximum charge rate even if the battery pack warms.
Electronic Protection System
XR Li-Ion tools are designed with an Electronic Protection
System that will protect the battery pack against overloading,
overheating or deep discharge.
The tool will automatically turn off if the Electronic Protection
System engages. If this occurs, place the lithium-ion battery
pack on the charger until it is fully charged.
Wall Mounting
These chargers are designed to be wall mountable or to sit
upright on a table or work surface. If wall mounting, locate the
charger within reach of an electrical outlet, and away from a
corner or other obstructions which may impede air flow. Use
the back of the charger as a template for the location of the
mounting screws on the wall. Mount the charger securely using
drywall screws (purchased separately) at least 25.4mm long
with a screw head diameter of 7–9mm, screwed into wood to
an optimal depth leaving approximately 5.5mm of the screw
exposed. Align the slots on the back of the charger with the
exposed screws and fully engage them in the slots.
Charger Cleaning Instructions
WARNING: Shock hazard. Disconnect the charger
from the AC outlet before cleaning. Dirt and grease
may be removed from the exterior of the charger using a
cloth or soft non-metallic brush. Do not use water or any
cleaning solutions. Never let any liquid get inside the tool;
never immerse any part of the tool into a liquid.
reassembly may result in a risk of electric shock, electrocution
orfire.
• In case of damaged power supply cord the supply cord must
be replaced immediately by the manufacturer, its service agent
or similar qualified person to prevent anyhazard.
• Disconnect the charger from the outlet before
attempting any cleaning. This will reduce the risk of
electric shock. Removing the battery pack will not reduce
thisrisk.
• NEVER attempt to connect two chargerstogether.
• The charger is designed to operate on standard
230V household electrical power. Do not attempt to
use it on any other voltage. This does not apply to the
vehicularcharger.
Charging a Battery (Fig. B)
1. Plug the charger into an appropriate outlet before inserting
battery pack.
2. Insert the battery pack 6 into the charger, making sure the
battery pack is fully seated in the charger. The red (charging)
light will blink repeatedly indicating that the charging
process has started.
3. The completion of charge will be indicated by the red
light remaining ON continuously. The battery pack is fully
charged and may be used at this time or left in the charger.
To remove the battery pack from the charger, push the
battery release button 7 on the battery pack.
NOTE: To ensure maximum performance and life of lithium-ion
battery packs, charge the battery pack fully before first use.
Charger Operation
Refer to the indicators below for the charge status of the
batterypack.
Charge Indicators
Charging
Fully Charged
Hot/Cold Pack Delay*
*The red light will continue to blink, but a yellow indicator light
will be illuminated during this operation. Once the battery pack
has reached an appropriate temperature, the yellow light will
turn off and the charger will resume the charging procedure.
The compatible charger(s) will not charge a faulty battery pack.
The charger will indicate faulty battery by refusing to light.
NOTE: This could also mean a problem with a charger.
If the charger indicates a problem, take the charger and battery
pack to be tested at an authorised service centre.
Hot/Cold Pack Delay
When the charger detects a battery pack that is too hot or too
cold, it automatically starts a Hot/Cold Pack Delay, suspending
charging until the battery pack has reached an appropriate
temperature. The charger then automatically switches to the
pack charging mode. This feature ensures maximum battery
pack life.

8
ENGLISH
• Do not incinerate the battery pack even if it is severely
damaged or is completely worn out. The battery pack can
explode in a fire. Toxic fumes and materials are created when
lithium-ion battery packs are burned.
• If battery contents come into contact with the skin,
immediately wash area with mild soap and water. If
battery liquid gets into the eye, rinse water over the open eye
for 15 minutes or until irritation ceases. If medical attention
is needed, the battery electrolyte is composed of a mixture of
liquid organic carbonates and lithium salts.
• Contents of opened battery cells may cause respiratory
irritation. Provide fresh air. If symptoms persists, seek
medicalattention.
WARNING: Burn hazard. Battery liquid may be
flammable if exposed to spark or flame.
WARNING: Never attempt to open the battery pack for
any reason. If battery pack case is cracked or damaged,
do not insert into charger. Do not crush, drop or damage
battery pack. Do not use a battery pack or charger that
has received a sharp blow, been dropped, run over or
damaged in any way (i.e., pierced with a nail, hit with
a hammer, stepped on). Electric shock or electrocution
may result. Damaged battery packs should be returned to
service centre for recycling.
WARNING: Fire hazard. Do not store or carry the
battery pack so that metal objects can contact
exposed battery terminals. For example, do not place
the battery pack in aprons, pockets, tool boxes, product kit
boxes, drawers, etc., with loose nails, screws, keys, etc.
CAUTION: When not in use, place tool on its side on
a stable surface where it will not cause a tripping
or falling hazard. Some tools with large battery packs
will stand upright on the battery pack but may be easily
knocked over.
Transportation
WARNING: Fire hazard. Transporting batteries can
possibly cause fire if the battery terminals inadvertently
come in contact with conductive materials. When
transporting batteries, make sure that the battery
terminals are protected and well insulated from
materials that could contact them and cause a short
circuit. NOTE: Lithium-ion batteries should not be put in
checkedbaggage.
DeWALT
batteries comply with all applicable shipping
regulations as prescribed by industry and legal standards which
include UN Recommendations on the Transport of Dangerous
Goods; International Air Transport Association (IATA) Dangerous
Goods Regulations, International Maritime Dangerous Goods
(IMDG) Regulations, and the European Agreement Concerning
The International Carriage of Dangerous Goods by Road (ADR).
Lithium-ion cells and batteries have been tested to section 38.3
of the UN Recommendations on the Transport of Dangerous
Goods Manual of Tests and Criteria.
In most instances, shipping a
DeWALT
battery pack will be
excepted from being classified as a fully regulated Class 9
Hazardous Material. In general, only shipments containing a
lithium-ion battery with an energy rating greater than 100 Watt
Hours (Wh) will require being shipped as fully regulated Class 9.
All lithium-ion batteries have the Watt Hour rating marked on
the pack. Furthermore, due to regulation complexities,
DeWALT
does not recommend air shipping lithium-ion battery packs
alone regardless of Watt Hour rating. Shipments of tools with
batteries (combo kits) can be air shipped as excepted if the Watt
Hour rating of the battery pack is no greater than 100 Whr.
Regardless of whether a shipment is considered excepted
or fully regulated, it is the shipper's responsibility to consult
the latest regulations for packaging, labeling/marking and
documentation requirements.
The information provided in this section of the manual is
provided in good faith and believed to be accurate at the time
the document was created. However, no warranty, expressed or
implied, is given. It is the buyer’s responsibility to ensure that its
activities comply with the applicable regulations.
Storage Recommendations
1. The best storage place is one that is cool and dry away
from direct sunlight and excess heat or cold. For optimum
battery performance and life, store battery packs at room
temperature when not in use.
2. For long storage, it is recommended to store a fully charged
battery pack in a cool, dry place out of the charger for
optimal results.
NOTE: Battery packs should not be stored completely depleted
of charge. The battery pack will need to be recharged before
use.
Labels on Charger and Battery Pack
In addition to the pictographs used in this manual, the labels
on the charger and the battery pack may show the following
pictographs:
Read instruction manual before use.
See Technical Data for charging time.
Do not probe with conductive objects.
Do not charge damaged battery packs.
Do not expose to water.
Have defective cords replaced immediately.
Charge only between 4 ˚C and 40 ˚C.
Only for indoor use.

9
ENGLISH
Inserting and Removing the Battery Pack
from the Tool (Fig. B)
NOTE: Make sure your battery pack 6 is fullycharged.
ASSEMBLY AND ADJUSTMENTS
WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect battery pack
before making any adjustments or removing/
installing attachments or accessories. An accidental
start-up can causeinjury.
WARNING: Use only
DeWALT
battery packs andchargers.
Description (Fig. A, B)
WARNING: Never modify the power tool or any part of it.
Damage or personal injury couldresult.
1 Variable speed trigger switch
2 Lock-off button
3 Blade clamp
4 Shoe
5 Hand grip
6 Battery pack
7 Battery release button
8 Main handle
9 Worklight
10 Datecode
Intended Use
Your DCS312 cordless reciprocating sabre saw has been
designed for professional sawing of wood, metal and tubes. The
compact design permits cutting extremely close to the edge of
difficultareas.
DO NOT use under wet conditions or in the presence of
flammable liquids orgases.
This reciprocating saw is a professional powertool.
DO NOT let children come into contact with the tool.
Supervision is required when inexperienced operators use
thistool.
• Young children and the infirm. This appliance is not
intended for use by young children or infirm persons
withoutsupervision.
• This product is not intended for use by persons (including
children) suffering from diminished physical, sensory or
mental abilities; lack of experience, knowledge or skills
unless they are supervised by a person responsible for their
safety. Children should never be left alone with thisproduct.
Date Code Position (Fig. B)
The date code 10, which also includes the year of manufacture,
is printed into thehousing.
Example:
2020 XX XX
Year of Manufacture
Markings on Tool
The following pictograms are shown on the tool:
Read instruction manual before use.
Wear ear protection.
Wear eye protection.
Visible radiation. Do not stare into light.
Package Contents
The package contains:
1 Cordless reciprocating saw
1 Kitbox (C, D, L, M, P, S, T, X, Y, NT models)
1 Charger (C, D, L, M, P, S, T X, Y models)
1 Li-Ion battery pack (C1, D1, L1, M1, P1, S1, T1, X1, Y1 models)
2 Li-Ion battery packs (C2, D2, L2, M2, P2, S2, T2, X2, Y2 models)
3 Li-Ion battery packs (C3, D3, L3, M3, P3, S3, T3, X3, Y3 models)
1 Instruction manual
NOTE: Battery packs, chargers and kitboxes are not included
with N models. Battery packs and chargers are not included with
NT models. Bmodels include Bluetooth® batterypacks.
NOTE: The Bluetooth® word mark and logos are registered
trademarks owned by the Bluetooth®, SIG, Inc. and any use of
such marks by
DeWALT
is under license. Other trademarks and
trade names are those of their respectiveowners.
• Check for damage to the tool, parts or accessories which may
have occurred duringtransport.
• Take the time to thoroughly read and understand this manual
prior tooperation.
Battery Type
The DCS312 operates on a 12 volt batterypack.
These battery packs may be used: DCB122, DCB124, DCB125,
DCB127. Refer to Technical Data for moreinformation.
Discard the battery pack with due care for the
environment.
Charge
DeWALT
battery packs only with designated
DeWALT
chargers. Charging battery packs other
than the designated
DeWALT
batteries with a
DeWALT
charger may make them burst or lead to
other dangerous situations.
Do not incinerate the battery pack.

10
ENGLISH
Proper hand position requires one hand on the main handle(8,
or one hand on the main handle and one hand on the hand
grip (5.
Cutting (Fig.D, F–H)
WARNING: Always use eye protection. All users and
bystanders must wear approved eyeprotection.
WARNING: Exercise extra caution when cutting towards
operator. Always hold saw firmly with both hands
whilecutting.
Before cutting any type of material, be sure it is firmly anchored
or clamped to prevent slipping. Place blade lightly against work
to be cut, switch on saw motor and allow it to obtain maximum
speed before applying pressure. Whenever possible, the saw
shoe must be held firmly against the material being cut. This
will prevent the saw from jumping or vibrating and minimise
Proper Hand Position (Fig. D)
WARNING: To reduce the risk of serious personal injury,
ALWAYS use proper hand position asshown.
WARNING: To reduce the risk of serious personal
injury, ALWAYS hold securely in anticipation of a
suddenreaction.
OPERATION
Instructions for Use
WARNING: Always observe the safety instructions and
applicableregulations.
WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect battery pack
before making any adjustments or removing/
installing attachments or accessories. An accidental
start-up can cause injury.
Variable Speed Trigger Switch (Fig.E)
Lock-off Button and Trigger switch
Your saw is equipped with a lock-off button (2.
To lock the trigger switch, press the lock-off button on the
left. Always lock the trigger switch (1 when carrying or storing
the tool to eliminate unintentionalstarting.
To unlock the trigger switch, press the lock-off button on the
right. Pull the trigger switch to turn the motor ON. Releasing the
trigger switch turns the motorOFF.
WARNING: This tool has no provision to lock the switch
in the ON position, and should never be locked ON by any
othermeans.
The variable speed trigger switch will give you added versatility.
The further the trigger is depressed the higher the speed of
thesaw.
CAUTION: Use of very slow speed is recommended only
for beginning a cut. Prolonged use at very slow speed may
damage yoursaw.
Worklight (Fig. A)
There is a worklight (9 located on the end of the tool near
the shoe. The worklight is activated when the trigger switch is
depressed. When the trigger is released, the worklight will stay
illuminated for up to 20seconds.
NOTE: The worklight is for lighting the immediate work surface
and is not intended to be used as a flashlight.
Blade Installation and Removal (Fig.C, F)
WARNING: Remove battery beforeInstalling / Removing
ablade.
To Install the Battery Pack into the Tool Handle
1. Align the battery pack 6 with the rails inside the tool’s
handle (Fig. B).
2. Slide it into the handle until the battery pack is firmly seated
in the tool and ensure that you hear the lock snap intoplace.
To Remove the Battery Pack from the Tool
1. Press the release button 7 and firmly pull the battery pack
out of the toolhandle.
2. Insert battery pack into the charger as described in the
charger section of thismanual.
Fuel Gauge Battery Packs (Fig. B)
Some
DeWALT
battery packs include a fuel gauge which
consists of three green LED lights that indicate the level of
charge remaining in the batterypack.
To actuate the fuel gauge, press and hold the fuel gauge
button 12. A combination of the three green LED lights will
illuminate designating the level of charge left. When the level
of charge in the battery is below the usable limit, the fuel gauge
will not illuminate and the battery will need to berecharged.
NOTE: The fuel gauge is only an indication of the charge left on
the battery pack. It does not indicate tool functionality and is
subject to variation based on product components, temperature
and end-userapplication.
Different blade lengths are available. Use the appropriate blade
for the application. The blade should be longer than 90 mm and
should extend past the shoe and the thickness of the workpiece
during the cut. Do not use jigsaw blades with thistool.
WARNING: Cut hazard. Blade breakage may occur if the
blade does not extend past the shoe and the workpiece
during the cut. Increased risk of personal injury, as well as
damage to the shoe and workpiece mayresult.
To Install Blade into Saw
1. Twist open the blade clamp ( 3 to its full openposition.
2. Insert blade ( 11 fully into bladeclamp.
3. Release blade clamp. Gently tug on the blade to ensure blade
is clampedsecurely.
NOTE: The blade can be installed upside-down for flush cutting.
Refer to FigureF.
To Remove Blade from Saw
CAUTION: Burn hazard. Do not touch the blade
immediately after use. Contact with the blade may result
in personalinjury.
1. Twist open blade clamp ( 3 to its full openposition.
2. Removeblade ( 11.

11
ENGLISH
Protecting the Environment
Separate collection. Products and batteries marked
with this symbol must not be disposed of with normal
householdwaste.
Products and batteries contain materials that can
be recovered or recycled reducing the demand for raw
materials. Please recycle electrical products and batteries
according to local provisions. Further information is available at
www.2helpU.com.
Rechargeable Battery Pack
This long life battery pack must be recharged when it fails
to produce sufficient power on jobs which were easily done
before. At the end of its technical life, discard it with due care for
our environment:
• Run the battery pack down completely, then remove it from
the tool.
• Li-Ion cells are recyclable. Take them to your dealer or a
local recycling station. The collected battery packs will be
recycled or disposed of properly.
Optional Accessories
WARNING: Since accessories, other than those offered
by
DeWALT
, have not been tested with this product, use
of such accessories with this tool could be hazardous.
To reduce the risk of injury, only
DeWALT
recommended
accessories should be used with thisproduct.
Consult your dealer for further information on the
appropriateaccessories.
Cleaning
WARNING: Blow dirt and dust out of the main housing
with dry air as often as dirt is seen collecting in and around
the air vents. Wear approved eye protection and approved
dust mask when performing thisprocedure.
WARNING: Never use solvents or other harsh chemicals
for cleaning the non-metallic parts of the tool. These
chemicals may weaken the materials used in these parts.
Use a cloth dampened only with water and mild soap.
Never let any liquid get inside the tool; never immerse any
part of the tool into aliquid.
Lubrication
Your power tool requires no additionallubrication.
MAINTENANCE
Your power tool has been designed to operate over a long
period of time with a minimum of maintenance. Continuous
satisfactory operation depends upon proper tool care and
regularcleaning.
WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect battery pack
before making any adjustments or removing/
installing attachments or accessories. An accidental
start-up can cause injury.
The charger and battery pack are notserviceable.
blade breakage. Any cuts that put pressure on the blade such as
angle or scroll cuts increase potential for vibration, kickback, and
bladebreakage.
WARNING:Use extra caution when cutting overhead and
pay particular attention to overhead wires that may be
hidden from view. Anticipate the path of falling branches
and debris ahead oftime.
WARNING: Inspect work site for hidden gas pipes, water
pipes, or electrical wires before making blind or plunge
cuts. Failure to do so may result in explosion, property
damage, electric shock, and/or serious personalinjury.
Flush-To Cutting (Fig.F)
The compact design of the saw motor housing and spindle
housing permits extremely close cutting to floors, corners and
other difficultareas.
Pocket/plunge Cutting – Wood Only (Fig.D, G)
The initial step in pocket cutting is to measure the surface area
to be cut and mark clearly with a pencil, chalk or scriber. Use
the appropriate blade for the application. The blade should
be longer than 90mm and should extend past the shoe and
the thickness of the workpiece during the cut. Insert blade in
bladeclamp.
Next, tip the saw backward until the back edge of the shoe
is resting on the work surface and the blade clears the work
surface (position 1, Fig.G). Now switch motor on, and allow
saw to come up to speed. Grip saw as shown in Figure D and
begin a slow, deliberate upward swing with the handle of the
saw, keeping the bottom of the shoe firmly in contact with
the workpiece (position 2, Fig.G). Blade will begin to feed into
material. Always be sure blade is completely through material
before continuing with pocketcut.
NOTE: In areas where blade visibility is limited, use the edge
of the saw shoe as a guide. Lines for any given cut should be
extended beyond edge of cut to bemade.
Metal Cutting (Fig.H)
Your saw has different metal cutting capacities depending upon
type of blade used and the metal to be cut. Use a finer blade for
ferrous metals and a coarse blade for non-ferrous materials. In
thin gauge sheet metals it is best to clamp wood to both sides
of sheet. This will ensure a clean cut without excess vibration or
tearing of metal. Always remember not to force cutting blade as
this reduces blade life and causes costly bladebreakage.
NOTE: It is generally recommended that when cutting metals
you should spread a thin film of oil or other lubricant along
the line ahead of the saw cut for easier operation and longer
bladelife.

N915307 12/20
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