Matco Tools RL4120 User manual

1 RL4120 02/22/02
RL4120
4-1/2" Electric
Grinder
• Operating Instructions
• Warning Information
• Parts Breakdown
Motor: . . . . . . . . . . . . . . . . . 710 W
Input Current: . . . . . . . . . . . . . 6.2A
Input: . . . . . . . . . . . . . . 120V, 60Hz
No Load Speed: . . . . . . 11,500 RPM
SPECIFICATIONS
ALWAYS READ
INSTRUCTIONS
BEFORE USING
POWER TOOLS
ALWAYS WEAR
SAFETY GOGGLES
WEAR HEARING
PROTECTION
AVOID
PROLONGED
EXPOSURE TO
VIBRATION
Some dust created by power sanding,
sawing, grinding, drilling, and other
construction activities contains chemicals
known to cause cancer, birth defects or
other reproductive harm. Some examples
of these chemicals are:
• lead from lead-based paints,
• crystalline silica from bricks and
cement and other masonry products,
and
• arsenic and chromium from
chemically-treated lumber.
Your risk from these exposures varies,
depending on how often you do this type
of work. To reduce your exposure to these
chemicals: work in a well ventilated
area, and work with approved safety
equipment, such as those dust masks that
are specially designed to filter out
microscopic particles.

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WARNING - READ AND UNDERSTAND ALL INSTRUCTIONS!
FAILURE TO FOLLOW ALL INSTRUCTIONS LISTED BELOW MAY RESULT IN ELECTRIC
SHOCK, FIRE AND/OR SERIOUS PERSONAL INJURY
SAVE THESE INSTRUCTIONS
This instruction manual contains
important safety information.
READ THIS INSTRUCTION MANUAL
CAREFULLY AND UNDERSTAND ALL
INFORMATION BEFORE OPERATING
THIS TOOL.
WORK AREA
• Keep your work area clean and well lit. Cluttered
benches and dark areas invite accidents.
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.
• Keep bystanders, children, and visitors away while
operating power tool. Distractions can cause you to
lose control.
ELECTRICAL SAFETY
• Double insulated tools are equipped with a
polarized plug (one blade is wider than the other).
This plug will fit in a polarized outlet only one way.
If the plug does not fit fully in the outlet, reverse
the plug. If it still does not fit, contact a qualified
electrician to install a polarized outlet. Do not
change the plug in any way. Double insulation
eliminates the need for the three wire grounded
power cord and grounded power supply system.
• Avoid body contact with grounded surfaces such as
pipes, radiators, ranges and refrigerators. There is an
increased risk of electric shock if your body is
grounded.
• Don’t expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of
electric shock.
• Do not abuse the cord. Never use the cord to carry
the tools or pull the plug from an outlet. Keep cord
away from heat, oil, sharp edges or moving parts.
Replace damaged cords immediately. Damaged
cords increase the risk of electric shock.
• When operating a power tool outside, use an
outdoor extension cord marked “W-A” or “W”.
These cords are rated for outdoor use and reduce the
risk of electric shock.
PERSONAL SAFETY
• Stay alert, watch what you are doing and use
common sense when operating a power tool. Do not
use tools while tired or under the influence of drugs,
alcohol, or medication. A moment of inattention
while operating power tools may result in serious
personal injury.
• Dress properly. Do not wear loose
clothing or jewelry. Contain long hair.
Keep your hair, clothing, and gloves away
from moving parts. Loose clothes, jewelry,
or long hair can be caught in moving
parts.
• Avoid accidental starting. Be sure
switch is off before plugging in. Carrying
tools with your finger on the switch or
plugging in tools that have the switch on
invites accidents.
Remove adjusting keys or switches before
turning the tool on. A wrench or a key
that is left attached to a rotating part or
the tool may result in personal injury.
• Do not overreach. Keep proper footing
and balance at all times. Proper footing
and balance enables better control of the
tool in unexpected situations.
• Use safety equipment. Always wear
eye protection. Dust mask, non-skid safety
shoes, hard hat, or hearing protection
must be used for appropriate conditions.

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TOOL USE AND CARE
• Use clamps or other practical way to secure and
support the workpiece to a stable platform. Holding
the work by hand or against your body is unstable
and may lead to loss of control.
• Do not force tool. Use the correct tool for your
applications. The correct tools will do the job better
and safer at the rate for which it is designed.
• Do not use tool if switch does not turn it on or off.
Any tool that cannot be controlled with the switch is
dangerous and must be repaired.
• Disconnect the plug from the power source before
making any adjustments, changing accessories, or
storing the tool. Such preventive safety measures
reduce the risk of starting the tool accidentally.
• Store idle tools out of reach of children and other
untrained persons. Tools are dangerous in the hands
of untrained users.
Maintain tools with care. Keep cutting tools sharp and
clean. Properly maintained tools, with sharp cutting
edges are less likely to bind and are easier to control.
Check for misalignment of binding or binding or
moving parts, breakage of parts, and any other
condition that may effect the tool’s operation. If
damaged, have the tool serviced before using. Many
accidents are caused by poorly maintained tools.
Use only accessories that are recommended by the
manufacturer for your model. Accessories that may be
suitable for one tool, may become hazardous when
used on another tool.
SERVICE
Tool service must be performed only by qualified
repair personnel. Service or maintenance performed
by unqualified personnel could result in a risk
of injury.
When servicing a tool, use only identical replacement
parts. Follow instruction in the Maintenance section of
this manual. Use of unauthorized parts or failure to
follow Maintenance instructions may create a risk of
electric shock or injury.
SPECIFIC SAFETY RULES
Always use proper guard with grinding wheel. A
guard protects operator from broken wheel.
Accessories must be rated for at least the speed
recommended on the tool warning label. Wheels
and other accessories running over rated speed can
fly apart and cause injury.
Hold tool by insulated gripping surfaces when
performing an operation where the cutting tool 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.
OPERATION
1. Preparing your grinder
To prepare your grinder proceed as follows:
Disconnect the plug from the electricity supply.
Fit the appropriate disc to the grinder
2. Operating your sander
To switch your sander on, press the switch marked “1”.
To switch your sander off, press the switch marked “0”.
MAINTENANCE
1. The brushes should be checked periodically and
worn out brushes should be replaced in time by a
qualified serviceman.
2. Keep the vent passage clear from dirt, clean off the
accumulated dust and oil dirt periodically.
3. During normal operation, if anything happens, the
power supply should be cut off at once and the tool
should be checked and repaired.
CAUTION: Only a qualified serviceman can repair
the tool.
WARRANTY
Matco warrants its electric tools for a period of
1 year to the consumer. We will repair any electric
tool covered under this warranty which proves to
be defective in material or workmanship during the
warranty period. In order to have your tool repaired,
return the tool to any Matco Authorized Electric
Warranty Center, freight prepaid. Please include a
copy of your proof of purchase and a brief description
of the problem. The tool will be inspected and if any
part or parts are found to be defective in material or
workmanship, they will be repaired free of charge
and the repaired tool will be returned to you
freight prepaid.
This warranty does not apply to normal wear and
tear, nor does it cover any damage caused by careless
or unsafe handling, alterations, accidents, misuse, or
repair attempts by anyone other than an authorized
warranty center.
This warranty gives you specific rights. You may also
have other rights which vary from state to state.
The foregoing obligation is Matco’s sole liability
under this or any implied warranty and under no
circumstances shall Matco be liable for any incidental
or consequential damages.
Note: Some states do not allow the exclusion or
limitation of incidental or consequential damages
so the above limitation or exclusion may not apply
to you.

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Ref. Part
No. No. Description
1 412001 Switch Knob
3 412003 Spring
4 412004 Slide Bar
5 412005 Electric Capacity
6 412006 Blade
7 412007 Switch
8 412008 Back Cover
9 412009 Spring Washer
10 412010 Tapping Screw
11 412011 Switch Holder
12 412012 Tapping Screw
13 412013 Spring Washer
14 412014 Cord Sets
15 412015 Cord Armor
16 412016 Brush Cap
17 412017 Carbon Brush
18 412018 Brush Holder
19 412019 Cord Clip
20 412020 Screw
22 412022 Frame
23 412023 Stator
Ref. Part
No. No. Description
24 412024 Tapping Screw
25 412025 Spring Washer
26 412026 Ball Bearing
27 412027 Stop Plate
28 412028 Armature
29 412029 Bearing Cover
30 412030 Ball Bearing
31 412031 Handle
32 412032 Bevel Gear
33 412033 Hex Nut
34 412034 Bearing Cover
35 412035 Ball Bearing
36 412036 Spacer Shim
37 412037 Plain Washer
38 412038 Spring Washer
39 412039 Tapping Screw
40 412040 End Cover
41 412041 Spindle
42 412042 Key
43 412043 Wheel Nut
44 RL4120GW Abrasive Disc (pk. of 2)
Ref. Part
No. No. Description
45 412045 Wheel Flange
46 412046 Screw
47 412047 Dust Cover
48 412048 Plain Washer
49 412049 Spring Washer
50 412050 Hex Nut
51 412051 Screw
52 412052 Bevel Gear
53 412053 Washer For Shaft
54 412054 Needle Bearing
55 412055 Driver Gear Box
56 412056 Tapping Screw
57 412057 Spring Washer
58 412058 Dust Cover
59 412059 Plain Washer
60 412060 Spring Washer
61 412061 Tapping Screw
62 412062 Spring
63 412063 Bottom
64 412064 Pin
RL4120
4-1/2" Electric
Grinder
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