Matco Tools RL-450 User manual

RL-450 1 Rev. 08/06/03
Operating Instructions • Warning Information • Parts Breakdown
SPECIFICATIONS RL-450
4" HEAVY
DUTY ANGLE
GRINDER
Max. Free Speed....11,000 RPM
Air Inlet ....................1/4" NPT
Hose Size ....................3/8" ID
Air Pressure ....................90 PSI
Air Consumption ............6 CFM
Pad Size ............................4"
Height..........................3-1/2"
Length..........................9-1/2"
Shipping Wt. ................4 Lbs.
™
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.
ALWAYS READ
INSTRUCTIONS
BEFORE USING
POWER TOOLS
ALWAYS WEAR
SAFETY GOGGLES
WEAR HEARING
PROTECTION
AVOID
PROLONGED
EXPOSURE TO
VIBRATION
•MAXIMUM RPM OF 11,000
•MAX AIR PRESSURE: 90
PSIG, 6.2 BAR
•RPM OF THE ACCESSORY
MUST EXCEED TOOL RPM
•RPM ON WHEEL MUST
EXCEED GRINDER RPM

RL-450 2 Rev. 08/06/03
THIS INSTRUCTION MANUAL CONTAINS
IMPORTANT SAFETY INFORMATION.
READ THIS INSTRUCTION MANUAL
CAREFULLY AND UNDERSTAND ALL
INFORMATION BEFORE OPERATING
THIS TOOL.
•Always operate, inspect and maintain
this tool in accordance with American National
Standards Institute Safety Code of Portable Air Tools
(ANSI B186.1) and any other applicable safety
codes and regulations.
•For safety, top performance and maximum
durability of parts, operate this tool at 90 psig 6.2
bar max air pressure with 3/8" diameter air supply
hose.
•Always wear impact-resistant eye and face
protection when operating or performing
maintenance on this tool. Always wear
hearing protection when using this tool.
•High sound levels can cause
permanent hearing loss. Use hearing
protection as recommended by your
employer or OSHA regulation.
• Keep the tool in efficient operating
condition.
• Operators and maintenance personnel
must be physically able to handle the bulk, weight
and power of this tool.
•Air under pressure can cause severe injury.
Never direct air at yourself or others. Always turn off
the air supply, drain hose of air pressure and detach
tool from air supply before installing, removing or
adjusting any accessory on this tool, or before performing
any maintenance on this tool. Failure to
do so could result in injury. Whip hoses
can cause serious injury. Always check
for damaged, frayed or loose hoses and
fittings, and replace immediately. Do not
use quick detach couplings at tool. See instructions
for correct set-up.
•Air powered tools can vibrate in use. Vibration,
repetitive motions or uncomfortable positions over
extended periods of time may be harmful to your
FAILURE TO OBSERVE THESE WARNINGS COULD RESULT IN INJURY.
hands and arms. Discontinue use of
tool if discomfort, tingling feeling or
pain occurs. Seek medical advice before
resuming use.
• Place the tool on the work before
starting the tool.
•Slipping, tripping and/or falling while operating air
tools can be a major cause of serious injury or
death. Be aware of excess hose left on the walking or
work surface.
• Keep body working stance balanced
and firm. Do not overreach when operating
the tool.
• Anticipate and be alert for sudden
changes in motion during start up and
operation of any power tool.
•Do not carry tool by the hose. Protect the hose from
sharp objects and heat.
•Tool shaft may continue to rotate briefly after throttle
is released. Avoid direct contact with
accessories during and after use. Gloves will
reduce the risk of cuts or burns.
•Keep away from rotating end of tool. Do not wear
jewelry or loose clothing. Secure long hair. Scalping
can occur if hair is not kept away from tool and
accessories. Choking can occur if neckwear is not
kept away from tool and accessories.
• Correct grinding wheel mounting is
necessary to prevent injury from
broken wheels. Do not use chipped or
cracked grinding wheels. Grinding
wheels should be a free fit on the
spindle to prevent stress at the hole. Use only wheel
collars that come with the grinder for mounting the
grinding wheel. Flat washers or other adapters may
over stress the wheel. Always use heavy paper
blotter discs between the wheel collars and the
grinding wheel. Tighten the wheel on the spindle to
prevent spin off when the air grinder is turned off.
•Do not lubricate tools with flammable or volatile liquids
such as kerosene, diesel or jet fuel.
•Don’t force tool beyond its rated capacity.
•Do not remove any labels. Replace damaged labels.

RL-450 3 Rev. 08/06/03
4
34
4
7
37
3
8
11
12
10
43
13
9
14
19
2
6
16 48
15
1
41 40
17
26
25
24
22
23
20
17
18
52
53 54
55
59 56 62
57
58
60
51
50
61
39
47
45
28
42
44
4546
RL-450
4" Heavy Duty Angle Grinder
REF.
NO. DESCRIPTION QTY.
PART
NO.
4
1
1
1
1
1
1
8
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Cap Screw
O-Ring
Disc Spanner
Stop Spanner
Adjust Screw & Nut
Wave Washer
Governor Assembly
Pendulum
Plunger
Spring Pin
Exhaust Cover
Lock Ring
Coupling Nut
Valve Screw
O-Ring
Valve Spring
O-Ring
Valve Housing
Hose Adapter
Spring Pin
Valve Pin
Throttle Lever
Valve Bushing
Plastic Cover
21137
21139
21140
21141
21142
21143
21144
21145
21146
21147
21148
21150
21151
21152
21153
21154
21155
21156
21157
21158
21159
21160
21161
21162
DESCRIPTION QTY.
PART
NO.
REF.
NO.
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
4
1
1
1
Body
Screw
Disc Cover
Disc Nut
Grip
Retainer
Gasket
Ball Bearing
Bevel Gear
Gear Shaft
Key
Ret. Ring
Ball Bearing
Pinion Gear
Screw
Ball Bearing
Ball Bearing
Spacer
Front Plate
Spring Pin
Cylinder
Rotor
Rotor Blade
Rear Plate
Spring
Disc Wheel
1
2
3
4
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
22
23
24
25
26
28
34
21101
21102
21103
21104
21106
21107
21108
21109
21110
21111
21112
21113
21114
21115
21116
30531
21118
21119
21120
21122
21123
21124
21125
21126
21128
21134
37
39
40
41
42
43
44
45
46
47
48
50
51
52
53
54
55
56
57
58
59
60
61
62

RL-450 4 Rev. 08/06/03
Nipple
Leader Hose
Whip Hose
Nipple Filter
Air Supply
Regulator
Quick Coupler Oiler
Drain Daily
Do Not Install
Quick Coupling
Here
Operating Instructions • Warning Information • Parts Breakdown
Operation...
•Always use the recommended wheel guard to prevent injury
from broken grinding wheel parts. If a guard has withstood a
wheel breakage, discontinue its use and replace it with a new
guard. It may be damaged. Position the guard between the
grinding wheel and the operator. Use barriers to protect others
from wheel fragments and grinding sparks.
•Always wear impact-resistant eye and face protection when in-
volved in the operation of this tool. Even small projectiles can
injure eyes and cause blindness. A grinding wheel that bursts
can cause very serious injury. Daily measure the air grinder
speed with a tachometer to make sure it's not greater than the
RPM marked on the grinding wheel. Never use a grinding wheel
marked with a speed lower than the air grinder speed.
•Before grinding, test grinding wheel by briefly running the tool
at full throttle. Be sure to use a barrier (such as under a heavy
work table) to stop any possible broken wheel parts.
To Assemble Grinding Discs:
1. Use stop spanner (#41) to hold gear shaft (#11).
2. Screw on disc nut (#4) with shoulder side facing tool. Tighten.
3. Attach grinding disc wheel.
4. Screw on other disc nut, shoulder side facing tool.
Secure tightly!
Air Supply...
Tools of this class operate on a wide range of air pressures. It is
recommended that air pressure of these tools measure 90 PSI at the
tool while running free. Higher pressure (over 90 psig; 6.2 bar) raises
performance beyond the rated capacity of the tool which will shorten
the tool’s life because of faster wear and could cause injury.
Always use clean, dry air. Dust, corrosive fumes and/or water in the
air line will cause damage to the tool. Drain the air tank daily. Clean
the air inlet filter screen on at least a weekly schedule. The recom-
mended hookup procedure can be viewed in the above figure.
The air inlet used for connecting air supply, has standard 1/4" NPT.
Line pressure should be increased to compensate for unusually long
air hoses (over 25 feet). Minimum hose diameter should be 3/8" I.D.
and fittings should have the same inside dimensions and be
tightly secured.
Lubrication...
Lubricate the air motor daily with quality motor oil. If no air line oiler
is used, run a teaspoon of oil through the tool. The oil can be squirted
into the tool air inlet or into the hose at the nearest connection to the
air supply, then run the tool. The amount of oil to be used is 1 ounce.
Overfilling will cause a reduction in the power of the tool.
MATCO TOOLS™ 1 YEAR LIMITED WARRANTY FOR AIR TOOLS
Matco warrants its air tools for a period of 1 year to the consumer. We will repair any air 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 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 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.