FAC T
S H E E T
JIG SAWS
A jig saw is a hand-held power tool that
The power source is usually mains electricity,
can make straight cuts or cut curves. It has
although jig saws are also powered by
an interchanging blade that can be switched
rechargeable batteries.
to suit the material, which may be wood,
plastic, or metal.
FIGURE 1: JIG SAW
HAZARDS:
PPE:
Power
control
>> Entanglement
from contact with
the blade
>> Saw action/
vibration
>> Fire/electric
currents
Guard
Dust
exhaust
Blade
clamp
>> Heat
>> Noise
>> Dust
>> Slips, trips & falls
Blade
Base
plate
>> Unexpected
movement (during
maintenance,
cleaning & repairs)
TASK – CUT THE MATERIAL
Hazard
Entanglement
from contact
with blade
Harm
Controls
>> Deep
cuts or
amputation
>> FIX guarding.
>> Potential
piercing
injury
>> HOLD blades in the cut until the blade stops
moving, to avoid the blade breaking when it hits
the material.
>> POSITION the moving blade as far possible below
the surface of the material being cut.
WSNZ_00011.9_APR 14
>> Material MUST be held securely. Holding it by
hand or by leaning on it with a knee or foot is
NOT enough.
Material can become unstable during cutting, leading to loss of control. Withdrawing a moving blade
during a cut can allow the blade to impact the material and break.
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Saw action/
vibration
>> Vibration
may injure
fingers,
hands,
or arms
>> WEAR anti-vibration gloves to protect hands from
excessive vibration.
>> LIMIT usage time and take rest periods.
>> KEEP the workpiece stationary and clamped.
The oscillating action may cause injury through exposure to vibration, especially if used for long periods.
TASK – CUT THE MATERIAL
Hazard
Fire/electric
currents
Harm
>> Electric shock
>> Burns
Controls
>> KEEP coins, hand tools, screws, and
similar objects away from power tool
battery terminals.
>> ENSURE battery caps are fitted
during transport.
>> CONNECT mains powered saws
through an RCD to protect against
electric shock.
>> ENSURE saws, extension leads, and
RCDs are tested regularly.
Power tool battery terminals touching metal objects can cause a fire hazard. Power tool batteries are
extra low voltage (18 V is common) but designed to supply high amounts of electric current. Mains
powered jig saws are a portable appliance with potential to give electric shocks if faults develop.
OTHER (NON-MECHANICAL) HAZARDS
Hazard
Heat
Harm
>> Burns
Controls
>> Avoid touching the blade with fingers
until it cools.
Blades heat up as they cut. When removing a blade after cutting, it may be hot enough to burn.
Noise
>> Hearing damage
or loss
>> REDUCE noise levels by isolating
machines or enclosing within
noise barriers.
>> ASSESS noise levels.
>> ARRANGE hearing screenings.
>> ALWAYS WEAR hearing protection.
A safe noise level over an eight hour day is 85dB(A). A jig saw may exceed this noise intensity,
particularly if it is used to cut sheet metal.
Dust
>> Eye irritation or
damage
>> CONNECT dust extraction to the
exhaust on the saw if possible.
>> Breathing problems,
lung damage
or cancer
>> ALWAYS WEAR eye protection.
>> Worsening of existing
health problems
>> ALWAYS USE respiratory protection.
Slips trips
and falls
>> Cuts
>> Bruising
>> KEEP up-to-date housekeeping
procedures.
>> KEEP the area around machines clear
of slip and trip hazards.
TASK - MAINTENANCE, CLEANING & REPAIRS
Hazard
Contact,
impact or
entanglement
from
unexpected
movement
Harm
>> Contact or impact
injuries
>> Cuts or piercing
injuries
>> Bruising
>> Fractures
Saw movement can start accidentally during blade changes.
Controls
>> UNPLUG power or REMOVE batteries
during blade changes, maintenance,
cleaning and repairs.
>> When changing a blade with a hand
tool, the hand tool MUST be removed
before power is restored to the saw.
References, current standards and further information can be found on the Safe Use of Machinery
project page at: www.worksafe.govt.nz
PUBLISHED: APRIL 2014. CURRENT UNTIL REVIEW IN 2017
worksafe.govt.nz
0800 030 040