jobmate JM850AG Installation manual

SAFETY AND OPERATING MANUAL
850W/100mm
ANGLE GRINDER
JM850AG

2
GENERAL POWER TOOL
SAFETY WARNINGS
WARNING! Read all safety warnings and all
instructions. Failure to follow the warnings
and instructions 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 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, clothing and
gloves 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.
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 the battery pack from the power tool

3
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. 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.
5. 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.
SAFETY INSTRUCTIONS FOR
ALL OPERATIONS
SAFETY WARNINGS COMMON FOR GRINDING,
SANDING, WIRE BRUSHING, POLISHING OR
ABRASIVE CUTTING-OFF OPERATIONS:
a) This power tool is intended to function as a grinder,
sander, wire brush, polisher or cut-off tool. 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.
b) Operations such as grinding, sanding, wire brushing,
polishing or cutting-off are not recommended to be
performed with this power tool. Operations for which
the power tool was not designed may create a hazard
and cause personal injury.
c) Do not use accessories which are not specifically
designed and recommended by the tool
manufacturer. Just because the accessory can be
attached to your power tool, it does not assure safe
operation.
d) The rated speed of the accessory must be at least
equal to the maximum speed marked on the power
tool. Accessories running faster than their rated
speed can break and fly apart.
e) The outside diameter and the thickness of your
accessory must be within the capacity rating of your
power tool. Incorrectly sized accessories cannot be
adequately guarded or controlled.
f) Threaded mounting of accessories must match the
grinder spindle thread. For accessories mounted by
flanges, the arbour hole of the accessory must fit
the locating diameter of the flange. Accessories that
do not match the mounting hardware of the power
tool will run out of balance, vibrate excessively and may
cause loss of control.
g) Do not use a damaged accessory. Before each use
inspect the accessory such as abrasive wheels for
chips and cracks, backing pad for cracks, tear or
excess wear, wire brush for loose or cracked wires.
If power tool or accessory is dropped, inspect for
damage or install an undamaged accessory. After
inspecting and installing an accessory, position
yourself and bystanders away from the plane of
the rotating accessory and run the power tool at
maximum no-load speed for one minute.
Damaged accessories will normally break apart during
this test time.
h) Wear personal protective equipment. Depending on
application, use face shield, safety goggles or safety
glasses. As appropriate, wear dust mask, hearing
protectors, gloves and workshop apron capable of
stopping small abrasive or workpiece fragments.
The eye protection must be capable of stopping
flying debris generated by various operations . The
dust mask or respirator must be capable of filtrating
particles generated by your operation. Prolonged
exposure to high intensity noise may cause hearing
loss.
i) Keep bystanders a safe distance away from work
area. Anyone entering the work area must wear
personal protective equipment. Fragments of
workpiece or of a broken accessory may fly away and
cause injury beyond immediate area of operation.
j) Hold the power tool by insulated gripping surfaces
only, when performing an operation where the
cutting accessory may contact hidden wiring or its
own cord. Cutting accessory contacting a “live” wire

4
may make exposed metal parts of the power tool “live”
and could give the operator an electric shock.
k) Position the cord clear of the spinning accessory.
If you lose control, the cord may be cut or snagged
and your hand or arm may be pulled into the spinning
accessory.
l) Never lay the power tool down until the accessory
has come to a complete stop. The spinning accessory
may grab the surface and pull the power tool out of
your control.
m) Do not run the power tool while carrying it at your
side. Accidental contact with the spinning accessory
could snag your clothing, pulling the accessory into
your body.
n) Regularly clean the power tool’s air vents. The
motor’s fan will draw the dust inside the housing and
excessive accumulation of powdered metal may cause
electrical hazards.
o) Do not operate the power tool near flammable
materials. Sparks could ignite these materials.
p) Do not use accessories that require liquid coolants.
Using water or other liquid coolants may result in
electrocution or shock.
q) Recommendation that the tool always be supplied
via a residual current device with a rated residual
current of 30mA or less.
FURTHER SAFETY INSTRUCTIONS FOR ALL
OPERATIONS
KICKBACK AND RELATED WARNINGS
Kickback is a sudden reaction to a pinched or
snagged rotating wheel, backing pad, brush or
any other accessory. Pinching or snagging causes
rapid stalling of the rotating accessory which in
turn causes the uncontrolled power tool to be
forced in the direction opposite of the accessory’s
rotation at the point of the binding.
For example, if an abrasive wheel is snagged or
pinched by the workpiece, the edge of the wheel
that is entering into the pinch point can dig into
the surface of the material causing the wheel to
climb out or kick out. The wheel may either jump
toward or away from the operator, depending on
direction of the wheel’s movement at the point of
pinching. Abrasive wheels may also break under
these conditions.
Kickback is the result of power tool misuse and/
or incorrect operating procedures or conditions
and can be avoided by taking proper precautions
as given below.
a) Maintain a firm grip on the power tool and position
your body and arm to allow you to resist kickback
forces. Always use auxiliary handle, if provided, for
maximum control over kickback or torque reaction
during start-up. The operator can control torque
reactions or kickback forces, if proper precautions are
taken.
b) Never place your hand near the rotating accessory.
Accessory may kickback over your hand.
c) Do not position your body in the area where power
tool will move if kickback occurs. Kickback will propel
the tool in direction opposite to the wheel’s movement
at the point of snagging.
d) Use special care when working corners, sharp
edges etc. Avoid bouncing and snagging the
accessory. Corners, sharp edges or bouncing have a
tendency to snag the rotating accessory and cause
loss of control or kickback.
e) Do not attach a saw chain woodcarving blade or
toothed saw blade. Such blades create frequent
kickback and loss of control.
SAFETY WARNINGS SPECIFIC FOR GRINDING
AND ABRASIVE CUTTING-OFF OPERATIONS:
a) Use only wheel types that are recommended for
your power tool and the specific guard designed for
the selected wheel. Wheels for which the power tool
was not designed cannot be adequately guarded and
are unsafe.
b) The grinding surface of centre depressed wheels
must be mounted below the plane of the guard lip.
An improperly mounted wheel that projects through
the plane of the guard lip cannot be adequately
protected.
c) The guard must be securely attached to the power
tool and positioned for maximum safety, so the least
amount of wheel is exposed towards the operator.
The guard helps to protect operator from broken
wheel fragments and accidental contact with wheel
and sparks that could ignite clothing.
d) Wheels must be used only for recommended
applications. For example: do not grind with the side
of cut-off wheel. Abrasive cut-off wheels are intended
for peripheral grinding, side forces applied to these
wheels may cause them to shatter.
e) Always use undamaged wheel flanges that are of
correct size and shape for your selected wheel.
Proper wheel flanges support the wheel thus
reducing the possibility of wheel breakage. Flanges
for cut-off wheels may be different from grinding wheel
flanges.

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f) Do not use worn down wheels from larger power
tools. Wheel intended for larger power tool is not
suitable for the higher speed of a smaller tool and may
burst.
ADDITIONAL SAFETY WARNINGS SPECIFIC FOR
ABRASIVE CUTTING-OFF OPERATIONS:
OPERATIONS
a) Do not “jam” the cut-off wheel or apply excessive
pressure. Do not attempt to make an excessive
depth of cut. Overstressing the wheel increases the
loading and susceptibility to twisting or binding of the
wheel in the cut and the possibility of kickback or wheel
breakage.
b) Do not position your body in line with and behind
the rotating wheel. When the wheel, at the point of
operation, is moving away from your body, the possible
kickback may propel the spinning wheel and the power
tool directly at you.
c) When wheel is binding or when interrupting a cut
for any reason, switch off the power tool and hold
the power tool motionless until the wheel comes
to a complete stop. Never attempt to remove the
cut-off wheel from the cut while the wheel is in motion
otherwise kickback may occur. Investigate and take
corrective action to eliminate the cause of wheel
binding.
d) Do not restart the cutting operation in the
workpiece. Let the wheel reach full speed and
carefully reenter the cut. The wheel may bind, walk
up or kickback if the power tool is restarted in the
workpiece.
e) Support panels or any oversized workpiece to
minimize the risk of wheel pinching and kickback.
Large workpieces tend to sag under their own
weight. Supports must be placed under the workpiece
near the line of cut and near the edge of the workpiece
on both sides of the wheel.
f) Use extra caution when making a “pocket cut” into
existing walls or other blind areas. The protruding
wheel may cut gas or water pipes, electrical wiring or
objects that can cause kickback.
SAFETY WARNINGS SPECIFIC FOR SANDING
OPERATIONS:
a) Do not use excessively oversized sanding disc
paper. Follow manufacturers recommendations,
when selecting sanding paper. Larger sanding
paper extending beyond the sanding pad presents a
laceration hazard and may cause snagging, tearing of
the disc or kickback.
SYMBOLS
To reduce the risk of injury, user must
read instruction manual
Double insulation
Warning
Wear ear protection
Wear eye protection
Wear dust mask
Wear protective gloves
RCM marking
ABN: Australian Business Number. By this number,
business information such as entity type, status,
business location etc. can be found at website http://
abr.business.gov.au.
ABN of Positec Australia Pty Limited is 14 101 682
357

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COMPONENT LIST
1. Auxiliary Handle
2. Spindle Lock Button
3. On-Off Switch
4. Hand Grip Area
5. Inner Flange
6. Outer Flange
7. Spanner
8. Grinding Disc*
9. Clamping Screw
10. Protection Guard For Grinding
11. Coded Projection
12. Protection Guard For Cutting*
*Not all the accessories illustrated or described are included in standard delivery.
1 2 3
5
8
7
6
9
10
11
12
4

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ACCESSORIES
Auxiliary handle 1
Spanner 1
Wheel guard for cutting (not supplied, available for helpline)
We recommend that you purchase your accessories from the same store that sold you the tool. Refer to the
accessory packaging for further details. Store personnel can assist you and offer advice.
TECHNICAL DATA
Rated voltage 230-240 V~50 Hz
Rated input power 850W
Rated speed 12000/min
Protection class /II
Spindle thread M10
Disc size 100mm
Disc bore 16mm
Machine weight 1.85k g

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OPERATION INSTRUCTIONS
NOTE: Before using the tool, read the instruction book
carefully.
INTENDED USE
The machine is intended for cutting, roughing and brushing
metal and stone materials without using water. For cutting
metal, a special protection guard for cutting (accessory) must
be used.
ASSEMBLY AND ADJUSTMENT
MOUNTING THE PROTECTIVE DEVICES
1. AUXILIARY HANDLE
For all work with the machine, the auxiliary handle (1) must
be mounted.
Screw the auxiliary handle (1) on the right or left of the
machine head depending on the working method. (See Fig. A)
Do not make any alterations to the auxiliary handle.
Do not continue to use an auxiliary handle if it is
damaged.
MOUNTING THE GRINDING TOOLS
Before any work on the machine itself, pull the mains plug.
Grinding and cutting discs become very hot while working; do
not touch until they have cooled.
1. SPINDLE LOCK BUTTON
Clean the grinder spindle and all parts to be mounted. For
clamping and loosening the grinding tools, lock the grinder
spindle with the spindle lock button (2).
Actuate the spindle lock button (2) only when the grinder
spindle is at a standstill!
2. GRINDING/CUTTING DISC
Pay attention to the dimensions of the grinding disc. The
mounting hole diameter must fit the inner flange (5) without
play. Do not use reducers or adapters.
When using a diamond cutting disc, take care that the
direction-of-rotation arrow on the diamond cutting disc and the
direction of rotation of the machine (direction-of-rotation arrow
on the machine head) agree.
For mounting, see the Component list illustration page.
Screw on the outer flange (6) and tighten with the two-pin
spanner (7).
3. ADJUSTABLE OUTER FLANGE CLAMPING
The outer flange (6) should be adjusted to suit different disc
thickness. For thinner cutting or diamond discs the raised part
of the outer flange is fitted facing away from the disc (See Fig.
C.2). For thicker grinding discs the raised part of the outer
3
15o-30o
Fig.A
Fig.B
Fig.C1
Fig.C2
Fig.D
Fig.E

9
flange is fitted facing towards the disc to provide improved
support for the disc hole (See Fig. C.1). Always ensure your disc
is securely clamped.
Adjusting the protection guard
Before any work on the machine itself, pull the mains plug.
For work with grinding or cutting discs, the protection guard
must be mounted.
The coded projection (11) on the protection guard (10)
ensures that only a guard that fits the machine type can be
mounted.
Loosen the clamping screw (9), if necessary.
Place the protection guard (10) with coded projection (11) into
the coded groove on the spindle collar of the machine head and
rotate to the required position (working position).
The closed side of the protection guard (10) must always point
to the operator.
Tighten clamping screw (9).
OPERATION
STARTING OPERATION
To start the power tool, push the on/off switch (3) forward.
To lock the on/off switch (3), press the on/off switch (3) down
at the front until it engages.
To switch off the power tool, release the on/off switch (3) or, if
it is locked, briefly push down the back of the on/off switch (3)
and then release it. (See Fig. D)
OPERATING INSTRUCTIONS
• Clamp the workpiece if it does not remain stationary due to its
own weight.
• Do not strain the machine so heavily that it comes to a
standstill.
• Grinding and cutting discs become very hot while working; do
not touch until they have cooled.
• Pull the plug from the socket-outlet when not using the
machine. With the plug inserted and mains voltage existing,
the power tool still has low power consumption even when it
switched off.
1. HAND GRIP AREAS
Always hold your angle grinder firmly with both hands when
operating (See Fig. E).
2. ROUGH GRINDING
The best roughing results are achieved when setting the
machine at an angle of 30° to 40°. Move the machine back and
forth with moderate pressure. In this manner, the workpiece
will not become too hot, does not discolour and no grooves are
formed.
WARNING: Never use a cutting disc for roughing.
3. CUTTING
3
15o-30o
Fig.A
Fig.B
Fig.C1
Fig.C2
Fig.D
Fig.E

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3. CUTTING
WARNING! For cutting metal, always work with
the wheel guard for cutting.
When cutting, do not press, tilt or oscillate the
machine. Work with moderate feed, adapted to the
material being cut.
Do not reduce the speed of running down cutting
discs by applying sideward pressure.
The direction in which the cutting is performed is
important.
The machine must always work in an up-grinding
motion. Therefore, never move the machine in the
other direction! Otherwise, the danger exists of it being
pushed uncontrolled out of the cut.
WORKING HINTS FOR YOUR
ANGLE GRINDER
If your power tool becomes too hot, run no load for 2-3
minutes to cool the motor.
Never start your angle grinder with the disc/ accessory in
contact with the workpiece.
Always start at no load to achieve maximum speed then
start working.
Do not force the disc to work faster, reducing the Disc’s
moving speed means longer working time.
When grinding, always work with a 30° to 40° angle
between disc and workpiece. Larger angles will cut ridges
into the workpiece and affect the surface finish. Move
the angle grinder across and back and forth over the
workpiece.
When using a cutting disc, never change the cutting angle
otherwise you will stall the disc and angle grinder motor or
break the disc.
When cutting, only cut in the opposite direction to the
disc rotation. If you cut in the same direction as the disc
rotation the disc may push itself out of the cut slot.
When cutting very hard material best results can be
achieved with a diamond disc.
When using a diamond disc it will become very hot. If
this happens you will see a full ring of sparks around the
rotating disc. Stop cutting and allow cooling at no load
speed for 2-3 minutes.
Always ensure the workpiece is firmly held or clamped to
prevent movement.
MAINTENANCE
Remove the plug from the socket before carrying
out any adjustment, servicing or maintenance.
Your power tool requires no additional lubrication or
maintenance.
There are no user serviceable parts in your power
tool. Never use water or chemical cleaners to clean
your power tool. Wipe clean with a dry cloth. Always
store your power tool in a dry place. Keep the motor
ventilation slots clean. Keep all working controls free
of dust. Occasionally you may see sparks through the
ventilation slots. This is normal and will not damage
your power tool.
If the supply cord is damaged, it must be replaced
by the manufacturer, its service agent or similarly
qualified persons in order to avoid a hazard.
WARRANTY
This product is warranted for a 2-year period for
home domestic use from the date of the original
purchase. If found to be defective in materials
or workmanship, the tool or the offending faulty
component will be replaced free of charge with
another of the same item. A small freight charge
may apply.
The warranty replacement unit only made available
by returning the tool to the place of purchase with
a confirmed register receipt.
Proof of purchase is essential.
We reserve the right to reject any claim where
the purchase cannot be verified.
This warranty does not include damage or defects
to the tool caused by or resulting from abuse,
accidents, alterations or commercial or business
use.