MasterCraft 057-7944-8, 057-7915-8 Owner's Manual

NAILER/STAPLER

057-7944-8

Owner’s Manual

PRODUCT SPECIFICATIONS

Rating:

120 V, 60 Hz AC

Amperes:

12.5 A

Switch:

Single shot trigger with safety lock

Repeat speed:

Up to 20 shots per minute

Staple size:

T50 (1.25x0.6 mm)
Crown: 3/8" (10.6 mm)
Length: 5/16–5/8" (8–16 mm)

Brad nail size:

Gauge: 18
Length: 5/16–5/8” (8–16 mm)

Magazine capacity:

Up to 100 nails or staples

Weight:

2 lb 15 oz (1.32 kg)

Need Assistance?

Call us on our toll free customer support line:
1-800-689-9928

 Technical questions
 Replacement parts
 Parts missing from package

Imported by Mastercraft Canada Toronto, Canada M4S 2B8

2

Product specifications ………….…………………………………………………….

1

Table of contents ……………………………………………………………………...

2

General safety warnings ……………………………………………………………..

3–4

Eye, ear & lung protection ……………………………………………………………

3–4

Electrical safety ……………………………………………………………………….

4

Power tool safety ……………………………………………………………………...

5–6

General safety rules …………………………………………………………………..

5

Work area ………………………………………………………………….…………..

5

Electrical safety ……………………………………………………………………….

5

Personal safety ………………………………………………………………………..

5–6

Use and care of power tools .………………………………………………………..

6

Service …………………………………………………………………………………

6

Specific safety rules …………………………………………………………………..

7

Extension cord safety ………………………………………………………….……..

8

Symbols ………………………………………………………………………………..

9

Know your nailer/stapler ……………………………………………………………..

10

Accessories and contents ……………………………………………………………

11

Assembly and operation ……………………………………………………………..

12–15

Loading the tool with brad nails ……………………………………………………..

12–13

Loading the tool with staples ………………………………………………………...

13–14

Depth control wheel …………………………………………………………………..

14

Setting the nail or staple depth ………………………………………………………

15

Nailing or stapling ……………………………………………………………………..

16

Removing a jammed nail or staple ………………………………………………….

17

Maintenance …………………………………………………………………………..

18

Exploded view ………………………………………………………………………...

19

Parts listing …………………………………………………………………………….

20–21

Warranty ……………………………………………………………………….………

22–23

TABLE OF CONTENTS

3

EYE, EAR & LUNG PROTECTION

This instruction manual includes the following:

 General Safety Rules
 Specific Safety Rules and Symbols
 Functional Description
 Assembly
 Operation
 Maintenance
 Accessories

!

ALWAYS WEAR EYE PROTECTION THAT CONFORMS WITH CSA
REQUIREMENTS or ANSI SAFETY STANDARD Z87.1

FLYING DEBRIS can cause permanent eye damage. Prescription
eyeglasses ARE NOT a replacement for proper eye protection.

WARNING: Non-compliant eyewear can cause serious injury if

broken during the operation of a power tool.

SAVE THESE INSTRUCTIONS FOR REFERENCE

WARNING: Use hearing protection, particularly during extended
periods of operation of the tool, or if the operation is noisy.

!

GENERAL SAFETY WARNINGS

CAUTION: Before using this tool or any of its accessories, read this

manual and follow all Safety Rules and Operating Instructions.

!

4

ELECTRICAL SAFETY

WARNING: To avoid electrical hazards, fire hazards or damage to the

tool, use proper circuit protection.

This tool is wired at the factory for 120 V operation. It must be connected to
a 120 V, 15 A circuit that is protected by a time-delayed fuse or circuit
breaker. To avoid shock or fire, replace power cord immediately if it is worn,
cut or damaged in any way.

GENERAL SAFETY WARNINGS

WEAR A DUST MASK THAT IS DESIGNED TO BE USED WHEN
OPERATING A POWER TOOL IN A DUSTY ENVIRONMENT.

WARNING: Dust that is created by power sanding, sawing, grinding,

drilling, and other construction activities may contain chemicals that are
known to cause cancer, birth defects, or other genetic abnormalities. These
chemicals include:

Lead from lead-based paints
Crystalline silica from bricks, cement, and other masonry products
Arsenic and chromium from chemically treated lumber

The level of risk from exposure to these chemicals varies, according to how
often this type of work is performed. In order to reduce exposure to these
chemicals, work in a well-ventilated area, and use approved safety
equipment, such as a dust mask that is specifically designed to filter out
microscopic particles.

!

5

GENERAL SAFETY RULES

WARNING: Read and understand

all instructions. Failure to follow all
instructions listed below may result in
electric shock, fire and/or serious personal
injury.

WORK AREA

Keep your work area clean and well lit.
Cluttered benches and dark areas invite
accidents.

Do not operate power tools in potentially
explosive environments, such as in the
presence of flammable liquids, gas or dust.
Power tools create sparks that may ignite
dust or fumes.

Keep bystanders, children and visitors
away while operating the tool. Distractions
can cause the operator to lose control.

ELECTRICAL SAFETY

Double insulated tools are equipped with a
polarized plug (one blade is wider than the
other). This plug will only fit into a
polarized plug one way.

If the plug does not fit into the outlet
properly, reverse the plug. If it still does not
fit, contact a qualified electrician to install a
polarized outlet. Do not alter the plug in
any way. Double insulation eliminates the
need for the three-pronged grounded
power cord and grounded power supply
system.

Avoid contact between the operator's body
and grounded surfaces such as pipes,
radiators, ranges, and refrigerators. There
is an increased risk of electric shock if the
operator's body is grounded.

Do not expose power tools to rain or wet
conditions. Water entering the power tool
will increase the risk of electric shock.

Do not abuse the cord. Do not use the
power cord to carry the tool or to pull the
plug out of the outlet. Keep the power cord
away from heat, oil, sharp edges, and
moving parts. Replace a damaged power
cord immediately. A damaged power cord
increases the risk of electric shock.

When operating a power tool outdoors,
use an outdoor-rated extension cord type
“W-A” or “W”. These cords are rated for
outdoor use and they reduce the risk of
electric shock.

PERSONAL SAFETY

Stay alert, be aware of the surroundings,
and use common sense when operating a
power tool. Do not use a power tool while
tired or under the influence of drugs,
alcohol, or medication. A moment of
inattention while operating a power tool
may result in serious personal injury.

Dress properly. Do not wear loose clothing
or jewellery.

Contain long hair. Keep hair, clothing, and
gloves away from moving parts. Loose
clothing, jewellery, or long hair can get
caught in moving parts.

!

POWER TOOL SAFETY

6

PERSONAL SAFETY – cont’d

Avoid accidental start-ups. Verify that the
switch is in the OFF position before
plugging in the tool. Carrying a power tool
with a finger on the switch or plugging in a
tool that has the switch in the ON position
invites accidents.

Remove adjusting keys and wrenches
before turning the tool ON. A wrench or
key that is left attached to a rotating part of
the tool may result in personal injury.

Do not overreach. Keep proper footing and
balance at all times. Proper footing and
balance allows the operator to maintain
better control of the tool in unexpected
situations.

Use safety equipment. Always wear eye
protection.

Use a dust mask, non-skid safety shoes, a
hardhat, or hearing protection when
appropriate.

USE AND CARE OF POWER TOOLS
Use clamps or another practical means to

secure and support the workpiece to a
stable platform. Holding the work in a hand
or against the body is not stable, and may
lead to loss of control.

Do not force the tool. Use the correct tool
for the application. The correct tool will do
the job better and safer when used at the
rate that it was designed to work at.

Do not use a power tool if it cannot be
turned ON or OFF using the power switch.
A tool that cannot be controlled using the
switch is dangerous, and must be repaired.

Disconnect the plug from the outlet before
making any adjustments, changing
accessories, or storing the tool. Such
preventive safety measures reduce the risk
of accidental start-ups.

When power tools are not in use, store
them out of the reach of children or
untrained persons. Tools are dangerous in
the hands of untrained users.

Maintain tools with care. Keep cutting tools
sharp and clean. Properly maintained
cutting tools with sharp cutting edges are
less likely to bind, and are easier to
control.

Inspect the tool for misalignment or binding
of moving parts, broken parts, and any
other condition that may affect the
operation of the tool. If it is damaged, have
the tool serviced before using it. Many
accidents are caused by poorly maintained
tools.

Use only accessories that are
recommended by the manufacturer for this
model. Accessories that are suitable for
one tool may become hazardous when
used with another tool.

SERVICE
Tool servicing must be performed by

qualified personnel. Service or
maintenance performed by non-qualified
personnel could result in a risk of injury.

When servicing a tool, use only identical
replacement parts. Follow the instructions
in the Maintenance section of this Manual.
The use of unauthorized parts or failure to
follow the instructions in the Maintenance
section of this Manual may create a risk of
electric shock or injury.

POWER TOOL SAFETY

7

WARNING: For your safety, do not
plug the tool into the power source or
install nails or staples in your nailer/stapler
until you have read and understood this
Owner’s Manual.

DANGER: Never point the

nailer/stapler at anyone.

Always wear safety goggles or face mask.
Use a dust mask along with safety goggles
if the operation is dusty.

Always use hearing protection, particularly
during extended periods of operation.

Do not wear gloves, neckties or loose
clothing.

Do not nail or staple any workpiece that is
too small to be securely held.

Always use a safe method to secure the
workpiece, and use both hands to guide
the tool. Never place your hands near or
below the surface being nailed or stapled.

Always keep your hands on the tool and
not near the nail or staple mechanism.
Avoid awkward hand positions where your
hand could move into the path of the nail
or staple.

Hold the tool by its insulated gripping
surfaces when performing an operation
where the tool, nail or staple may contact
hidden wiring or its own cord. Contact with

a “live” wire will make exposed metal parts

of the tool “live” and shock the operator.

Always make sure the work surface is free
from nails and other foreign objects. Hitting
a nail can cause the nail or staple to bend
and the tool to jump.

Never lay the workpiece on hard surfaces
like concrete, stone, etc. Protruding nails
or staples may cause the tool to jump.

Always place the switch in the OFF
position and remove the plug from the
power source before adding or removing
nails or staples from the magazine.

Always place the switch in the OFF
position and remove the plug from the
power source before servicing the tool or
removing a jammed nail or staple from the
magazine.

SPECIFIC SAFETY RULES

!

!

SAVE THESE INSTRUCTIONS FOR REFERENCE